Power Management

PI33XX-X0

Vicor Corporation

8V to 36VIN Cool-Power ZVS Buck Regulator Family

Manufacturer: Vicor Corporation

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8V to 36VIN Cool-Power ZVS Buck Regulator Family Cool-Power® ZVS Switching Regulators PI33xx-x0 Cool-Power® ZVS Switching Regulators Rev 2.5 Page 1 of 41 06/2017 Product Description The PI33xx-x0 is a family of high efficiency, wide input range DC-D C ZVS-Buck regulators integrating controller, power switches, and support components all within a high density System-in-Package (SiP). The integration of a high performance Zero-Voltage Switching (ZVS) topology, within the PI33xx-x0 series, increases point of load performance providing best in class power efficiency. The PI33xx-x0 requires only an external inductor and minimal capacitors to form a complete DC-DC switching mode Buck Regulator. The ZVS architecture also enables high frequency operation while minimizing switching losses and maximizing efficiency. The high switching frequency operation reduces the size of the external filtering components, improves power density, and enables very fast dynamic response to line and load transients. The PI33xx-x0 series sustains high switching frequency all the way up to the rated input voltage without sacrificing efficiency and, with its 20ns minimum on-time, supports large step down conversions up to 36V IN. Features & Benefits

High Efficiency ZVS-Buck Topology
Wide input voltage range of 8V to 36V
Very-Fast transient response
High accuracy pre-trimmed output voltage
User adjustable soft-start & tracking
Power-up into pre-biased load (select versions)
Parallel capable with single wire current sharing
Input Over/Undervoltage Lockout (OVLO/UVLO)
Output Overvoltage Protection (OVP)
Overtemperature Protection (OTP)
Fast and slow current limits
-40°C to 125°C operating range (TJ)
Optional I2C™ * functionality & programmability: ■■ VOUT margining ■■ Fault reporting ■■ Enable and SYNCI pin polarity ■■ Phase delay (interleaving multiple regulators)

Applications

High efficiency systems
High voltage battery operation

Package Information

10mm x 14mm x 2.6mm LGA SiP Device Output Voltage IOUT Max Set Range PI3311-x0 1.0V 1.0 to 1.4V 10A PI3318-x0 1.8V 1.4 to 2.0V 10A PI3312-x0 2.5V 2.0 to 3.1V 10A PI3301-x0 3.3V 2.3 to 4.1V 10A PI3302-x0 5.0V 3.3 to 6.5V 10A PI3303-x0 12V 6.5 to 13.0V 8A PI3305-x0 15V 10.0 to 16.0V 8A * I2C™ is a trademark of NXP Semiconductors

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 3 of 41 06/2017 PI33xx-x0 Order Information Cool-Power Output Range IOUT Max Package Transport MediaSet Range PI3311-00-LGIZ 1.0V 1.0 to 1.4V 10A 10mm x 14mm 123-pin LGA TRAY PI3318-00-LGIZ 1.8V 1.4 to 2.0V 10A 10mm x 14mm 123-pin LGA TRAY PI3312-00-LGIZ 2.5V 2.0 to 3.1V 10A 10mm x 14mm 123-pin LGA TRAY PI3301-00-LGIZ 3.3V 2.3 to 4.1V 10A 10mm x 14mm 123-pin LGA TRAY PI3302-00-LGIZ 5.0V 3.3 to 6.5V 10A 10mm x 14mm 123-pin LGA TRAY PI3303-00-LGIZ 12V 6.5 to 13.0V 8A 10mm x 14mm 123-pin LGA TRAY PI3305-00-LGIZ 15V 10.0 to 16.0V 8A 10mm x 14mm 123-pin LGA TRAY I2C™ Functionality & Programmability Cool-Power Output Range IOUT Max Package Transport MediaSet Range PI3311-20-LGIZ 1.0V 1.0 to 1.4V 10A 10mm x 14mm 123-pin LGA TRAY PI3318-20-LGIZ 1.8V 1.4 to 2.0V 10A 10mm x 14mm 123-pin LGA TRAY PI3312-20-LGIZ 2.5V 2.0 to 3.1V 10A 10mm x 14mm 123-pin LGA TRAY PI3301-20-LGIZ 3.3V 2.3 to 4.1V 10A 10mm x 14mm 123-pin LGA TRAY PI3302-20-LGIZ 5.0 V 3.3 to 6.5V 10A 10mm x 14mm 123-pin LGA TRAY PI3303-20-LGIZ 12V 6.5 to 13.0V 8A 10mm x 14mm 123-pin LGA TRAY PI3305-20-LGIZ 15V 10.0 to 16.0V 8A 10mm x 14mm 123-pin LGA TRAY

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 4 of 41 06/2017 PI33xx-x0 Absolute Maximum Ratings Functional Block Diagram VIN VOUT Notes: At 25°C ambient temperature. Stresses beyond these limits may cause permanent damage to the device. Operation at these conditions or conditions beyond those listed in the Electrical Specifications table is not guaranteed. All voltage nodes are referenced to PGND unless otherwise noted. Test conditions are per the specifications within the individual product electrical characteristics. Simplified Block Diagram (I2C™ pins SCL, SDA, ADR0, and ADR1 only active for PI33xx-20 device versions) Name Rating VIN -0.7 to 36V VS1 -0.7 to 36VDC SGND 100mA PWRGD, SYNCO, SYNCI, EN, EAO, ADJ, TRK, ADR1, ADR2, SCL, SDA, REM -0.3V to 5.5V / 5mA VOUT PI3311-x0-LGIZ -0.3V to 5.5V PI3318-x0-LGIZ -0.5V to 9V PI3312-x0-LGIZ -0.8V to 13V PI3301-x0-LGIZ -1.0V to 18V PI3302-x0-LGIZ -1.5V to 21V PI3303-x0-LGIZ -3.6V to 25V PI3305-x0-LGIZ -4.5V to 25V Storage Temperature -65°C to 150°C Operating Junction Temperature -40°C to 125°C Soldering Temperature for 20 seconds 245°C ESD Rating 2kV HBM

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 5 of 41 06/2017 PI33xx-x0 Package Pin-Out Pin Description PWRGD EAO EN REM VS1 Block 4 VIN Block 3 PGND Block 2 SYNCI SYNCO VDR SGND ADJ TRK SDA SCL ADR0 ADR1 K J H G F E D C B A 13125431 1421 098761 1 SGND Block 1 VOUT Block 5 NC Block 3: G12-14, H12-14, J12-14, K12-14 Block 4: A12-14, B12-14, C12-14, D12-14, E12-14 Block 5: A6-7, B6-7, C6-7, D6-7 Pin Name Number Description SGND Block 1 Signal Ground: Internal logic ground for EA, TRK, SYNCI, SYNCO, ADJ and I2C (options) communication returns. SGND and PGND are star connected within the regulator package. PGND Block 2 Power Ground: VIN and VOUT power returns. VIN Block 3 Input Voltage: and sense for UVLO, OVLO and feed forward ramp. VOUT Block 5 Output Voltage: and sense for power switches and feed-forward ramp. VS1 Block 4 Switching Node: and ZVS sense for power switches. PWRGD A1 Power Good: High impedance when regulator is operating and V OUT is in regulation. Otherwise pulls to SGND. Also can be used for parallel timing management intended for lead regulator. EAO A2 Error Amp Output: External connection for additional compensation and current sharing. EN A3 Enable Input: Regulator enable control. Asserted high or left floating – regulator enabled; Asserted low, regulator output disabled. Polarity is programmable via I2C interface. REM A5 Remote Sense: High side connection. Connect to output regulation point. ADJ B1 Adjust Input: An external resistor may be connected between ADJ pin and SGND or VOUT to trim the output voltage up or down. TRK C1 Soft-start and Track Input: An external capacitor may be connected between TRK pin and SGND to decrease the rate of rise during soft-start. NC A4 No Connect: Leave pins floating. VDR K3 VDR can only be used for ADR0 and ADR1 pull up reference voltage. No other external loading is permitted SYNCO K4 Synchronization Output: Outputs a low signal for ½ of the minimum period for synchronization of other converters. SYNCI K5 Synchronization Input: Synchronize to the falling edge of external clock frequency. SYNCI is a high impedance digital input node and should always be connected to SGND when not in use. SDA D1 Data Line: Connect to SGND for PI33xx-00. For use with PI33xx-20 only. SCL E1 Clock Line: Connect to SGND for PI33xx-00. For use with PI33xx-20 only. ADR1 H1 Tri-state Address: No connect for PI33xx-00. For use with PI33xx-20 only. ADR0 G1 Tri-state Address: No connect for PI33xx-00. For use with PI33xx-20 only.

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 6 of 41 06/2017 PI33xx-x0 PI3311-x0-LGIZ (1.0VOUT) Electrical Characteristics Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 125nH [1] [1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [3] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or VOUT is modified. [4] Refer to Output Ripple plots. [5] Refer to Load Current vs. Ambient Temperature curves. [6] Refer to Switching Frequency vs. Load current curves. Parameter Symbol Conditions Min Typ Max Unit Input Specifications Input Voltage VIN_DC 8 24 36 V Input Current IIN_DC VIN = 24V, TC = 25°C, IOUT =10A 476 mA Input Current At Output Short (fault condition duty cycle) IIN_Short [2] 20 mA Input Quiescent Current IQ_VIN Disabled 2.0 mA Enabled (no load) 2.5 mA Input Voltage Slew Rate VIN_SR 1 V/μs Output Specifications Output Voltage Total Regulation VOUT_DC [2] 0.987 1.0 1.013 V Output Voltage Trim Range VOUT_DC [3] 1.0 1.4 V Line Regulation ∆VOUT (∆VIN) @25°C, 8V < VIN < 36V 0.10 % Load Regulation ∆VOUT (∆IOUT) @25°C, 0.5A < IOUT < 10A 0.10 % Output Voltage Ripple VOUT_AC IOUT = 5A, COUT = 8 x 100μF, 20MHz BW [4] 20 mVp-p Continuous Output Current Range IOUT_DC [5] Minimum 1mA load required 0.001 10 A Current Limit IOUT_CL 12 A Protection VIN UVLO Start Threshold VUVLO_START 7.10 7.60 8.00 V VIN UVLO Stop Threshold VUVLO_STOP 6.80 7.25 7.60 V VIN UVLO Hysteresis VUVLO_HYS 0.33 V VIN OVLO Start Threshold VOVLO_START 36.1 V VIN OVLO Stop Threshold VOVLO_STOP 37.0 38.4 V VIN OVLO Hysteresis VOVLO_HYS 0.77 V VIN UVLO/OVLO Response Time tf 500 ns Output Overvoltage Protection VOVP Above VOUT 20 % Overtemperature Fault Threshold TOTP 130 135 140 °C Overtemperature Restart Hysteresis TOTP_HYS 30 °C

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 7 of 41 06/2017 PI33xx-x0 [1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [3] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or VOUT is modified. [4] Refer to Output Ripple plots. [5] Refer to Load Current vs. Ambient Temperature curves. [6] Refer to Switching Frequency vs. Load current curves. PI3311-x0-LGIZ (1.0VOUT) Electrical Characteristics (Cont.) Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 125nH [1] Parameter Symbol Conditions Min Typ Max Unit Timing Switching Frequency fS [6] 500 kHz Fault Restart Delay tFR_DLY 30 ms Sync In (SYNCI) Synchronization Frequency Range ∆fSYNCI Relative to set switching frequency [3] 50 110 % SYNCI Threshold VSYNCI 2.5 V SYNCI Input Impedance ZSYNCI 100 kΩ Sync Out (SYNCO) SYNCO High VSYNCO_HI Source 1mA 4.5 V SYNCO Low VSYNCO_LO Sink 1mA 0.5 V SYNCO Rise Time tSYNCO_RT 20pF load 10 ns SYNCO Fall Time tSYNCO_FT 20pF load 10 ns Soft Start And Tracking TRK Active Input Range VTRK Internal reference tracking range 0 1.04 V TRK Max Output Voltage 1.2 V TRK Disable Threshold VTRK_OV 20 40 60 mV Charge Current (Soft – Start) ITRK 70 50 30 μA Discharge Current (Fault) ITRK_DIS VTRK = 0.5V 6.8 mA Soft-Start Time tSS CTRK = 0μF 2.2 ms Enable High Threshold VEN_HI 0.9 1 1.1 V Low Threshold VEN_LO 0.7 0.8 0.9 V Threshold Hysteresis VEN_HYS 100 200 300 mV Enable Pull-Up Voltage (Floating) VEN_PU With positive logic EN polarity 2 V Enable Pull-Down Voltage (Floating) VEN_PD With negative logic EN polarity 0 V Source Current IEN_SO With positive logic EN polarity 50 μA Sink Current IEN_SK With negative logic EN polarity 50 μA

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 9 of 41 06/2017 PI33xx-x0 PI3318-x0-LGIZ (1.8VOUT) Electrical Characteristics Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 155nH [1] Parameter Symbol Conditions Min Typ Max Unit Input Specifications Input Voltage VIN_DC 8 24 36 V Input Current IIN_DC VIN = 24V, TC = 25°C, IOUT =10A 835 mA Input Current At Output Short (fault condition duty cycle) IIN_Short [2] 20 mA Input Quiescent Current IQ_VIN Disabled 2.0 mA Enabled (no load) 2.5 mA Input Voltage Slew Rate VIN_SR 1 V/μs Output Specifications Output Voltage Total Regulation VOUT_DC [2] 1.773 1.8 1.827 V Output Voltage Trim Range VOUT_DC [3] 1.4 2.0 V Line Regulation ∆VOUT (∆VIN) @25°C, 8V < VIN < 36V 0.10 % Load Regulation ∆VOUT (∆IOUT) @25°C, 0.5A < IOUT < 10A 0.10 % Output Voltage Ripple VOUT_AC IOUT = 5A, COUT = 6 x 100μF, 20MHz BW [4] 25 mVp-p Continuous Output Current Range IOUT_DC [5] Minimum 1mA load required 0.001 10 A Current Limit IOUT_CL 12 A Protection VIN UVLO Start Threshold VUVLO_START 7.10 7.60 8.00 V VIN UVLO Stop Threshold VUVLO_STOP 6.80 7.25 7.60 V VIN UVLO Hysteresis VUVLO_HYS 0.33 V VIN OVLO Start Threshold VOVLO_START 36.1 V VIN OVLO Stop Threshold VOVLO_STOP 37.0 38.4 V VIN OVLO Hysteresis VOVLO_HYS 0.77 V VIN UVLO/OVLO Response Time tf 500 ns Output Overvoltage Protection VOVP Above VOUT 20 % Overtemperature Fault Threshold TOTP 130 135 140 °C Overtemperature Restart Hysteresis TOTP_HYS 30 °C [1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [3] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or VOUT is modified. [4] Refer to Output Ripple plots. [5] Refer to Load Current vs. Ambient Temperature curves. [6] Refer to Switching Frequency vs. Load current curves.

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 10 of 41 06/2017 PI33xx-x0 PI3318-x0-LGIZ (1.8VOUT) Electrical Characteristics (Cont.) Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 155nH [1] Parameter Symbol Conditions Min Typ Max Unit Timing Switching Frequency fS [6] 600 kHz Fault Restart Delay tFR_DLY 30 ms Sync In (SYNCI) Synchronization Frequency Range ∆fSYNCI Relative to set switching frequency [3] 50 110 % SYNCI Threshold VSYNCI 2.5 V SYNCI Input Impedance ZSYNCI 100 kΩ Sync Out (SYNCO) SYNCO High VSYNCO_HI Source 1mA 4.5 V SYNCO Low VSYNCO_LO Sink 1mA 0.5 V SYNCO Rise Time tSYNCO_RT 20pF load 10 ns SYNCO Fall Time tSYNCO_FT 20pF load 10 ns Soft Start And Tracking TRK Active Input Range VTRK Internal reference tracking range 0 1.04 V TRK Max Output Voltage 1.2 V TRK Disable Threshold VTRK_OV 20 40 60 mV Charge Current (Soft – Start) ITRK 70 50 30 μA Discharge Current (Fault) ITRK_DIS VTRK = 0.5V 6.8 mA Soft-Start Time tSS CTRK = 0μF 2.2 ms Enable High Threshold VEN_HI 0.9 1 1.1 V Low Threshold VEN_LO 0.7 0.8 0.9 V Threshold Hysteresis VEN_HYS 100 200 300 mV Enable Pull-Up Voltage (Floating) VEN_PU With positive logic EN polarity 2 V Enable Pull-Down Voltage (Floating) VEN_PD With negative logic EN polarity 0 V Source Current IEN_SO With positive logic EN polarity 50 μA Sink Current IEN_SK With negative logic EN polarity 50 μA [1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [3] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or VOUT is modified. [4] Refer to Output Ripple plots. [5] Refer to Load Current vs. Ambient Temperature curves. [6] Refer to Switching Frequency vs. Load current curves.

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 12 of 41 06/2017 PI33xx-x0 PI3312-x0-LGIZ (2.5VOUT) Electrical Characteristics Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 200nH [1] Parameter Symbol Conditions Min Typ Max Unit Input Specifications Input Voltage VIN_DC [7] 8 24 36 V Input Current IIN_DC VIN = 24V, TC = 25°C, IOUT = 10A 1.14 A Input Current At Output Short (fault condition duty cycle) IIN_Short [2] 20 mA Input Quiescent Current IQ_VIN Disabled 2.0 mA Enabled (no load) 2.5 mA Input Voltage Slew Rate VIN_SR 1 V/μs Output Specifications Output Voltage Total Regulation VOUT_DC [2] 2.465 2.500 2.535 V Output Voltage Trim Range VOUT_DC [3] [7] 2.0 2.5 3.1 V Line Regulation ∆VOUT (∆VIN) @25°C, 8V < VIN < 36V 0.10 % Load Regulation ∆VOUT (∆IOUT) @25°C, 0.5A < IOUT < 10A 0.10 % Output Voltage Ripple VOUT_AC IOUT = 5A, COUT = 4 x 100μF, 20MHz BW [4] 28 mVp-p Continuous Output Current Range IOUT_DC [5] [7] 10 A Current Limit IOUT_CL 12 A Protection VIN UVLO Start Threshold VUVLO_START 7.10 7.60 8.00 V VIN UVLO Stop Threshold VUVLO_STOP 6.80 7.25 7.60 V VIN UVLO Hysteresis VUVLO_HYS 0.33 V VIN OVLO Start Threshold VOVLO_START 36.1 V VIN OVLO Stop Threshold VOVLO_STOP 37.0 38.4 V VIN OVLO Hysteresis VOVLO_HYS 0.77 V VIN UVLO/OVLO Response Time tf 500 ns Output Overvoltage Protection VOVP Above VOUT 20 % Overtemperature Fault Threshold TOTP 130 135 140 °C Overtemperature Restart Hysteresis TOTP_HYS 30 °C [1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [3] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or VOUT is modified. [4] Refer to Output Ripple plots. [5] Refer to Load Current vs. Ambient Temperature curves. [6] Refer to Switching Frequency vs. Load current curves. [7] Minimum 5V between VIN-VOUT must be maintained or a minimum load of 1mA required.

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 13 of 41 06/2017 PI33xx-x0 PI3312-x0-LGIZ (2.5VOUT) Electrical Characteristics (Cont.) Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 200nH [1] Parameter Symbol Conditions Min Typ Max Unit Timing Switching Frequency fS [6] 500 kHz Fault Restart Delay tFR_DLY 30 ms Sync In (SYNCI) Synchronization Frequency Range ∆fSYNCI Relative to set switching frequency [3] 50 110 % SYNCI Threshold VSYNCI 2.5 V SYNCI Input Impedance ZSYNCI 100 kΩ Sync Out (SYNCO) SYNCO High VSYNCO_HI Source 1mA 4.5 V SYNCO Low VSYNCO_LO Sink 1mA 0.5 V SYNCO Rise Time tSYNCO_RT 20pF load 10 ns SYNCO Fall Time tSYNCO_FT 20pF load 10 ns Soft Start And Tracking TRK Active Input Range VTRK Internal reference tracking range 0 1.04 V TRK Max Output Voltage 1.2 V TRK Disable Threshold VTRK_OV 20 40 60 mV Charge Current (Soft – Start) ITRK 70 50 30 μA Discharge Current (Fault) ITRK_DIS VTRK = 0.5V 6.8 mA Soft-Start Time tSS CTRK = 0μF 2.2 ms Enable High Threshold VEN_HI 0.9 1 1.1 V Low Threshold VEN_LO 0.7 0.8 0.9 V Threshold Hysteresis VEN_HYS 100 200 300 mV Enable Pull-Up Voltage (Floating) VEN_PU With positive logic EN polarity 2 V Enable Pull-Down Voltage (Floating) VEN_PD With negative logic EN polarity 0 V Source Current IEN_SO With positive logic EN polarity 50 μA Sink Current IEN_SK With negative logic EN polarity 50 μA [1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [3] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or VOUT is modified. [4] Refer to Output Ripple plots. [5] Refer to Load Current vs. Ambient Temperature curves. [6] Refer to Switching Frequency vs. Load current curves. [7] Minimum 5V between VIN-VOUT must be maintained or a minimum load of 1mA required.

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 16 of 41 06/2017 PI33xx-x0 PI3301-x0-LGIZ (3.3VOUT) Electrical Characteristics Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 200nH [1] Parameter Symbol Conditions Min Typ Max Unit Input Specifications Input Voltage VIN_DC [7] 8 24 36 V Input Current IIN_DC VIN = 24V, TC = 25°C, IOUT =10A 1.49 A Input Current At Output Short (fault condition duty cycle) IIN_Short [2] 20 mA Input Quiescent Current IQ_VIN Disabled 2.0 mA Enabled (no load) 2.5 mA Input Voltage Slew Rate VIN_SR 1 V/μs Output Specifications Output Voltage Total Regulation VOUT_DC [2] 3.25 3.30 3.36 V Output Voltage Trim Range VOUT_DC [3] [7] 2.3 3.3 4.1 V Line Regulation ∆VOUT (∆VIN) @25°C, 8V < VIN < 36V 0.10 % Load Regulation ∆VOUT (∆IOUT) @25°C, 0.5A < IOUT < 10A 0.10 % Output Voltage Ripple VOUT_AC IOUT = 5A, COUT = 4 x 100μF, 20MHz BW [4] 37.5 mVp-p Continuous Output Current Range IOUT_DC [5] 10 A Current Limit IOUT_CL 12 A Protection VIN UVLO Start Threshold VUVLO_START 7.10 7.60 8.00 V VIN UVLO Stop Threshold VUVLO_STOP 6.80 7.25 7.60 V VIN UVLO Hysteresis VUVLO_HYS 0.33 V VIN OVLO Start Threshold VOVLO_START 36.1 V VIN OVLO Stop Threshold VOVLO_STOP 37.0 38.4 V VIN OVLO Hysteresis VOVLO_HYS 0.77 V VIN UVLO/OVLO Response Time tf 500 ns Output Overvoltage Protection VOVP Above VOUT 20 % Overtemperature Fault Threshold TOTP 130 135 140 °C Overtemperature Restart Hysteresis TOTP_HYS 30 °C [1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [3] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or VOUT is modified. [4] Refer to Output Ripple plots. [5] Refer to Load Current vs. Ambient Temperature curves. [6] Refer to Switching Frequency vs. Load current curves. [7] Minimum 5V between VIN-VOUT must be maintained or a minimum load of 1mA required.

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 17 of 41 06/2017 PI33xx-x0 PI3301-x0-LGIZ (3.3VOUT) Electrical Characteristics (Cont.) Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 200nH [1] Parameter Symbol Conditions Min Typ Max Unit Timing Switching Frequency fS [6] 650 kHz Fault Restart Delay tFR_DLY 30 ms Sync In (SYNCI) Synchronization Frequency Range ∆fSYNCI Relative to set switching frequency [3] 50 110 % SYNCI Threshold VSYNCI 2.5 V SYNCI Input Impedance ZSYNCI 100 kΩ Sync Out (SYNCO) SYNCO High VSYNCO_HI Source 1mA 4.5 V SYNCO Low VSYNCO_LO Sink 1mA 0.5 V SYNCO Rise Time tSYNCO_RT 20pF load 10 ns SYNCO Fall Time tSYNCO_FT 20pF load 10 ns Soft Start And Tracking TRK Active Input Range VTRK Internal reference tracking range 0 1.04 V TRK Max Output Voltage 1.2 V TRK Disable Threshold VTRK_OV 20 40 60 mV Charge Current (Soft – Start) ITRK 70 50 30 μA Discharge Current (Fault) ITRK_DIS VTRK = 0.5V 6.8 mA Soft-Start Time tSS CTRK = 0μF 2.2 ms Enable High Threshold VEN_HI 0.9 1 1.1 V Low Threshold VEN_LO 0.7 0.8 0.9 V Threshold Hysteresis VEN_HYS 100 200 300 mV Enable Pull-Up Voltage (Floating) VEN_PU With positive logic EN polarity 2 V Enable Pull-Down Voltage (Floating) VEN_PD With negative logic EN polarity 0 V Source Current IEN_SO With positive logic EN polarity 50 μA Sink Current IEN_SK With negative logic EN polarity 50 μA [1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [3] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or VOUT is modified. [4] Refer to Output Ripple plots. [5] Refer to Load Current vs. Ambient Temperature curves. [6] Refer to Switching Frequency vs. Load current curves. [7] Minimum 5V between VIN-VOUT must be maintained or a minimum load of 1mA required.

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 20 of 41 06/2017 PI33xx-x0 PI3302-x0-LGIZ (5.0VOUT) Electrical Characteristics Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 200nH [1] Parameter Symbol Conditions Min Typ Max Unit Input Specifications Input Voltage VIN_DC [7] 8 24 36 V Input Current IIN_DC VIN = 24V, TC = 25°C, IOUT =10A 2.23 A Input Current At Output Short (fault condition duty cycle) IIN_Short [2] 20 mA Input Quiescent Current IQ_VIN Disabled 2.0 mA Enabled (no load) 2.5 mA Input Voltage Slew Rate VIN_SR 1 V/μs Output Specifications Output Voltage Total Regulation VOUT_DC [2] 4.93 5.00 5.07 V Output Voltage Trim Range VOUT_DC [3] [7] 3.3 6.5 V Line Regulation ∆VOUT (∆VIN) @25°C, 8V <VIN < 36V 0.10 % Load Regulation ∆VOUT (∆IOUT) @25°C, 0.5A <IOUT < 10A 0.10 % Output Voltage Ripple VOUT_AC IOUT = 5A, COUT = 4 x 47μF, 20MHz BW [4] 30 mVp-p Continuous Output Current Range IOUT_DC [5] [7] 10 A Current Limit IOUT_CL 12 A Protection VIN UVLO Start Threshold VUVLO_START 7.10 7.60 8.00 V VIN UVLO Stop Threshold VUVLO_STOP 6.80 7.25 7.60 V VIN UVLO Hysteresis VUVLO_HYS 0.33 V VIN OVLO Start Threshold VOVLO_START 36.1 V VIN OVLO Stop Threshold VOVLO_STOP 37.0 38.4 V VIN OVLO Hysteresis VOVLO_HYS 0.77 V VIN UVLO/OVLO Response Time tf 500 ns Output Overvoltage Protection VOVP Above VOUT 20 % Overtemperature Fault Threshold TOTP 130 135 140 °C Overtemperature Restart Hysteresis TOTP_HYS 30 °C [1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [3] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or VOUT is modified. [4] Refer to Output Ripple plots. [5] Refer to Load Current vs. Ambient Temperature curves. [6] Refer to Switching Frequency vs. Load current curves. [7] Minimum 5V between VIN-VOUT must be maintained or a minimum load of 1mA required.

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 21 of 41 06/2017 PI33xx-x0 PI3302-x0-LGIZ (5.0VOUT) Electrical Characteristics (Cont.) Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 200nH [1] Parameter Symbol Conditions Min Typ Max Unit Timing Switching Frequency fS [6] 1.0 MHz Fault Restart Delay tFR_DLY 30 ms Sync In (SYNCI) Synchronization Frequency Range ∆fSYNCI Relative to set switching frequency [3] 50 110 % SYNCI Threshold VSYNCI 2.5 V SYNCI Input Impedance ZSYNCI 100 kΩ Sync Out (SYNCO) SYNCO High VSYNCO_HI Source 1mA 4.5 V SYNCO Low VSYNCO_LO Sink 1mA 0.5 V SYNCO Rise Time tSYNCO_RT 20pF load 10 ns SYNCO Fall Time tSYNCO_FT 20pF load 10 ns Soft Start And Tracking TRK Active Input Range VTRK 0 1.04 V TRK Max Output Voltage 1.2 V TRK Disable Threshold VTRK_OV 20 40 60 mV Charge Current (Soft – Start) ITRK 70 50 30 μA Discharge Current (Fault) ITRK_DIS VTRK = 0.5V 6.8 mA Soft-Start Time tSS CTRK = 0μF 2.2 ms Enable High Threshold VEN_HI 0.9 1 1.1 V Low Threshold VEN_LO 0.7 0.8 0.9 V Threshold Hysteresis VEN_HYS 100 200 300 mV Enable Pull-Up Voltage (Floating) VEN_PU With positive logic EN polarity 2 V Enable Pull-Down Voltage (Floating) VEN_PD With negative logic EN polarity 0 V Source Current IEN_SO With positive logic EN polarity 50 μA Sink Current IEN_SK With negative logic EN polarity 50 μA [1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [3] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or VOUT is modified. [4] Refer to Output Ripple plots. [5] Refer to Load Current vs. Ambient Temperature curves. [6] Refer to Switching Frequency vs. Load current curves. [7] Minimum 5V between VIN-VOUT must be maintained or a minimum load of 1mA required.

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 24 of 41 06/2017 PI33xx-x0 PI3303-x0-LGIZ (12.0VOUT) Electrical Characteristics Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 230nH [1] Parameter Symbol Conditions Min Typ Max Unit Input Specifications Input Voltage VIN_DC [7] 17.4 24 36 V Input Current IIN_DC VIN = 24V, TC = 25°C, IOUT = 8A 4.15 A Input Current At Output Short (fault condition duty cycle) IIN_Short [2] 20 mA Input Quiescent Current IQ_VIN Disabled 2.0 mA Enabled (no load) 2.5 mA Input Voltage Slew Rate VIN_SR 1 V/μs Output Specifications Output Voltage Total Regulation VOUT_DC [2] 11.82 12.0 12.18 V Output Voltage Trim Range VOUT_DC [3] [7] 6.5 12 13.0 V Line Regulation ∆VOUT (∆VIN) @25°C, 8V < VIN < 36V 0.10 % Load Regulation ∆VOUT (∆IOUT) @25°C, 0.5A < IOUT < 8A 0.10 % Output Voltage Ripple VOUT_AC IOUT = 4A, COUT = 4 x 22μF, 20MHz BW [4] 60 mVp-p Continuous Output Current Range IOUT_DC [5] 8 A Current Limit IOUT_CL 9 A Protection VIN UVLO Start Threshold VUVLO_START 15.80 16.60 17.40 V VIN UVLO Stop Threshold VUVLO_STOP 15.00 15.80 16.60 V VIN UVLO Hysteresis VUVLO_HYS 0.77 V VIN OVLO Start Threshold VOVLO_START 36.1 V VIN OVLO Stop Threshold VOVLO_STOP 37.0 38.4 V VIN OVLO Hysteresis VOVLO_HYS 0.77 V VIN UVLO/OVLO Response Time tf 500 ns Output Overvoltage Protection VOVP Above VOUT 20 % Overtemperature Fault Threshold TOTP 130 135 140 °C Overtemperature Restart Hysteresis TOTP_HYS 30 °C [1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [3] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or VOUT is modified. [4] Refer to Output Ripple plots. [5] Refer to Load Current vs. Ambient Temperature curves. [6] Refer to Switching Frequency vs. Load current curves. [7] Minimum 5V between VIN-VOUT must be maintained or a minimum load of 1mA required.

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 25 of 41 06/2017 PI33xx-x0 PI3303-x0-LGIZ (12.0VOUT) Electrical Characteristics (Cont.) Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 230nH [1] Parameter Symbol Conditions Min Typ Max Unit Timing Switching Frequency fS [6] 1.4 MHz Fault Restart Delay tFR_DLY 30 ms Sync In (SYNCI) Synchronization Frequency Range ∆fSYNCI Relative to set switching frequency [3] 50 110 % SYNCI Threshold VSYNCI 2.5 V SYNCI Input Impedance ZSYNCI 100 kΩ Sync Out (SYNCO) SYNCO High VSYNCO_HI Source 1mA 4.5 V SYNCO Low VSYNCO_LO Sink 1mA 0.5 V SYNCO Rise Time tSYNCO_RT 20pF load 10 ns SYNCO Fall Time tSYNCO_FT 20pF load 10 ns Soft Start And Tracking TRK Active Input Range VTRK 0 1.04 V TRK Max Output Voltage 1.2 V TRK Disable Threshold VTRK_OV 20 40 60 mV Charge Current (Soft – Start) ITRK 70 50 30 μA Discharge Current (Fault) ITRK_DIS VTRK = 0.5V 6.8 mA Soft-Start Time tSS CTRK = 0μF 2.2 ms Enable High Threshold VEN_HI 0.9 1 1.1 V Low Threshold VEN_LO 0.7 0.8 0.9 V Threshold Hysteresis VEN_HYS 100 200 300 mV Enable Pull-Up Voltage (Floating) VEN_PU With positive logic EN polarity 2 V Enable Pull-Down Voltage (Floating) VEN_PD With negative logic EN polarity 0 V Source Current IEN_SO With positive logic EN polarity 50 μA Sink Current IEN_SK With negative logic EN polarity 50 μA [1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [3] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or VOUT is modified. [4] Refer to Output Ripple plots. [5] Refer to Load Current vs. Ambient Temperature curves. [6] Refer to Switching Frequency vs. Load current curves. [7] Minimum 5V between VIN-VOUT must be maintained or a minimum load of 1mA required.

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 28 of 41 06/2017 PI33xx-x0 PI3305-x0-LGIZ (15.0VOUT) Electrical Characteristics Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 230nH [1] Parameter Symbol Conditions Min Typ Max Unit Input Specifications Input Voltage VIN_DC [7] 20.4 24 36 V Input Current IIN_DC VIN = 24V, TC = 25°C, IOUT = 8A 5.15 A Input Current At Output Short (fault condition duty cycle) IIN_Short [2] 20 mA Input Quiescent Current IQ_VIN Disabled 2.0 mA Enabled (no load) 2.5 mA Input Voltage Slew Rate VIN_SR 1 V/μs Output Specifications Output Voltage Total Regulation VOUT_DC [2] 14.78 15.0 15.23 V Output Voltage Trim Range VOUT_DC [3] [7] 10.0 15 16 V Line Regulation ∆VOUT (∆VIN) @25°C, 8V < VIN < 36V 0.1 % Load Regulation ∆VOUT (∆IOUT) @25°C, 0.5A < IOUT < 8A 0.1 % Output Voltage Ripple VOUT_AC IOUT = 4A, COUT = 4 x 22μF, 20MHz BW [4] 60 mVp-p Continuous Output Current Range IOUT_DC [5] [7] 8 A Current Limit IOUT_CL 9 A Protection VIN UVLO Start Threshold VUVLO_START 18.4 19.4 20.4 V VIN UVLO Stop Threshold VUVLO_STOP 17.4 18.4 19.4 V VIN UVLO Hysteresis VUVLO_HYS 0.90 V VIN OVLO Start Threshold VOVLO_START 36.1 V VIN OVLO Stop Threshold VOVLO_STOP 37.0 38.4 V VIN OVLO Hysteresis VOVLO_HYS 0.77 V VIN UVLO/OVLO Response Time tf 500 ns Output Overvoltage Protection VOVP Above VOUT 20 % Overtemperature Fault Threshold TOTP 130 135 140 °C Overtemperature Restart Hysteresis TOTP_HYS 30 °C [1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [3] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or VOUT is modified. [4] Refer to Output Ripple plots. [5] Refer to Load Current vs. Ambient Temperature curves. [6] Refer to Switching Frequency vs. Load current curves. [7] Minimum 5V between VIN-VOUT must be maintained or a minimum load of 1mA required.

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 29 of 41 06/2017 PI33xx-x0 PI3305-x0-LGIZ (15.0VOUT) Electrical Characteristics (Cont.) Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 230nH [1] Parameter Symbol Conditions Min Typ Max Unit Timing Switching Frequency fS [6] 1.5 MHz Fault Restart Delay tFR_DLY 30 ms Sync In (SYNCI) Synchronization Frequency Range ∆fSYNCI Relative to set switching frequency [3] 50 110 % SYNCI Threshold VSYNCI 2.5 V SYNCI Input Impedance ZSYNCI 100 kΩ Sync Out (SYNCO) SYNCO High VSYNCO_HI Source 1mA 4.5 V SYNCO Low VSYNCO_LO Sink 1mA 0.5 V SYNCO Rise Time tSYNCO_RT 20pF load 10 ns SYNCO Fall Time tSYNCO_FT 20pF load 10 ns Soft Start And Tracking TRK Active Input Range VTRK 0 1.04 V TRK Max Output Voltage 1.2 V TRK Disable Threshold VTRK_OV 20 40 60 mV Charge Current (Soft – Start) ITRK 70 50 30 μA Discharge Current (Fault) ITRK_DIS VTRK = 0.5V 6.8 mA Soft-Start Time tSS CTRK = 0μF 2.2 ms Enable High Threshold VEN_HI 0.9 1 1.1 V Low Threshold VEN_LO 0.7 0.8 0.9 V Threshold Hysteresis VEN_HYS 100 200 300 mV Enable Pull-Up Voltage (Floating) VEN_PU With positive logic EN polarity 2 V Enable Pull-Down Voltage (Floating) VEN_PD With negative logic EN polarity 0 V Source Current IEN_SO With positive logic EN polarity 50 μA Sink Current IEN_SK With negative logic EN polarity 50 μA [1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4” dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value. [2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. [3] Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or VOUT is modified. [4] Refer to Output Ripple plots. [5] Refer to Load Current vs. Ambient Temperature curves. [6] Refer to Switching Frequency vs. Load current curves. [7] Minimum 5V between VIN-VOUT must be maintained or a minimum load of 1mA required.

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 32 of 41 06/2017 PI33xx-x0 Functional Description The PI33xx-x0 is a family of highly integrated ZVS-Buck regulators. The PI33xx-x0 has a set output voltage that is trimmable within a prescribed range shown in Table 1. Performance and maximum output current are characterized with a specific external power inductor (see Table 4). For basic operation, Figure 58 shows the connections and components required. No additional design or settings are required. ENABLE (EN) EN is the enable pin of the converter. The EN Pin is referenced to SGND and permits the user to turn the regulator on or off. The EN default polarity is a positive logic assertion. If the EN pin is left floating or asserted high, the converter output is enabled. Pulling EN pin below 0.8VDC with respect to SGND will disable the regulator output. The EN input polarity can be programmed (PI33xx-20 device versions only) via the I2C™ data bus. When the EN pin polarity is programmed for negative logic assertion; and if the EN pin is left floating, the regulator output is enabled. Pulling the EN pin above 1.0VDC with respect to SGND, will disable the regulator output. Remote Sensing An internal 100Ω resistor is connected between REM pin and VOUT pin to provide regulation when the REM connection is broken. Referring to Figure 58, it is important to note that L1 and COUT are the output filter and the local sense point for the power supply output. As such, the REM pin should be connected at COUT as the default local sense connection unless remote sensing to compensate additional distribution losses in the system. The REM pin should not be left floating. Switching Frequency Synchronization The SYNCI input allows the user to synchronize the controller switching frequency by an external clock referenced to SGND. The external clock can synchronize the unit between 50% and 110% of the preset switching frequency (fS). For PI33xx-20 device versions only, the phase delay can be programmed via I2C bus with respect to the clock applied at SYNCI pin. Phase delay allows PI33xx-20 regulators to be paralleled and operate in an interleaving mode. The PI33xx-x0 default for SYNCI is to sync with respect to the falling edge of the applied clock providing 180° phase shift from SYNCO. This allows for the paralleling of two PI33xx-x0 devices without the need for further user programming or external sync clock circuitry. The user can change the SYNCI polarity to sync with the external clock rising edge via the I2C data bus (PI33xx-20 device versions only). When using the internal oscillator, the SYNCO pin provides a 5V clock that can be used to sync other regulators. Therefore, one PI33xx-x0 can act as the lead regulator and have additional PI33xx-x0s running in parallel and interleaved. Soft-Start The PI33xx-x0 includes an internal soft-start capacitor to ramp the output voltage in 2ms from 0V to full output voltage. Connecting an external capacitor from the TRK pin to SGND will increase the start-up ramp period. See, “Soft Start Adjustment and Track,” in the Applications Description section for more details. Output Voltage Trim The PI33xx-x0 output voltage can be trimmed up from the preset output by connecting a resistor from ADJ pin to SGND and can be trimmed down by connecting a resistor from ADJ pin to VOUT. The Table 1 defines the voltage ranges for the PI33xx-x0 family. EN SGND VIN VIN VOUT SYNCI VS1 VOUT PGND SYNCO REM TRK ADJ EAO PI33xxCIN COUT Table 1 — PI33xx-x0 family output voltage range Figure 58 — ZVS-Buck with required components Device Output Voltage Set Range PI3311-x0-LGIZ 1.0V 1.0 to 1.4V PI3318-x0-LGIZ 1.8V 1.4 to 2.0V PI3312-x0-LGIZ 2.5V 2.0 to 3.1V PI3301-x0-LGIZ 3.3V 2.3 to 4.1V PI3302-x0-LGIZ 5.0V 3.3 to 6.5V PI3303-x0-LGIZ 12V 6.5 to 13.0V PI3305-x0-LGIZ 15V 10.0 to 16.0V

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 33 of 41 06/2017 PI33xx-x0 Output Current Limit Protection PI33xx-x0 has two methods implemented to protect from output short or over current condition. Slow Current Limit protection: prevents the output load from sourcing current higher than the regulator’s maximum rated current. If the output current exceeds the Current Limit (IOUT_CL) for 1024μs, a slow current limit fault is initiated and the regulator is shutdown which eliminates output current flow. After Fault Restart Delay (tFR_DLY ), a soft-start cycle is initiated. This restart cycle will be repeated indefinitely until the excessive load is removed. Fast Current Limit protection: PI33xx-x0 monitors the regulator inductor current pulse-by-pulse to prevent the output from supplying very high current due to sudden low impedance short (50A Typical). If the regulator senses a high inductor current pulse, it will initiate a fault and stop switching until Fault Restart Delay ends and then initiate a soft-start cycle. Both the Fast and Slow current limit faults are stored in a Fault Register and can be read and cleared (PI33xx-20 device versions only) via I2C data bus. Input Undervoltage Lockout If VIN falls below the input Undervoltage Lockout (UVLO) threshold, but remains high enough to power the internal bias supply, the PI33xx-x0 will complete the current cycle, stop switching, enter a low power state and initiate a fault. The system will restart once the input voltage is reestablished and after the Fault Restart Delay. A UVLO fault is stored in a Fault Register and can be read and cleared (PI33xx-20 device versions only) via I2C data bus. Input Overvoltage Lockout If VIN exceeds the input Overvoltage Lockout (OVLO) threshold (VOVLO), while the controller is running, the PI33xx-x0 will complete the current cycle, stop switching, enter a low power state and set an OVLO fault. The system will resume operation when the input voltage falls below 98% of the OVLO threshold and after the Fault Restart Delay. The OVLO fault is stored in a Fault Register and can be read and cleared (PI33xx-20 device versions only) via I2C™ data bus. Output Overvoltage Protection The PI33xx-x0 family is equipped with output Overvoltage Protection (OVP) to prevent damage to input voltage sensitive devices. If the output voltage exceeds 20% of its set regulated value, the regulator will complete the current cycle, stop switching and issue an OVP fault. The system will resume operation once the output voltage falls below the OVP threshold and after Fault Restart Delay. The OVP fault is stored in a Fault Register and can be read and cleared (PI33xx-20 device versions only) via I2C data bus. Overtemperature Protection The internal package temperature is monitored to prevent internal components from reaching their thermal maximum. If the Over Temperature Protection Threshold (OTP) is exceeded (TOTP), the regulator will complete the current switching cycle, enter a low power mode, set a fault flag, and will soft-start when the internal temperature falls below Overtemperature Restart Hysteresis (TOTP_HYS). The OTP fault is stored in a Fault Register and can be read and cleared (PI33xx-20 device versions only) via I2C data bus. Pulse Skip Mode (PSM) PI33xx-x0 features a PSM to achieve high efficiency at light loads. The regulators are setup to skip pulses if EAO falls below a PSM threshold. Depending on conditions and component values, this may result in single pulses or several consecutive pulses followed by skipped pulses. Skipping cycles significantly reduces gate drive power and improves light load efficiency. The regulator will leave PSM once the EAO rises above the Skip Mode threshold. Variable Frequency Operation Each PI33xx-x0 is preprogrammed to a base operating frequency, with respect to the power stage inductor (see Table 4), to operate at peak efficiency across line and load variations. At low line and high load applications, the base frequency will decrease to accommodate these extreme operating ranges. By stretching the frequency, the ZVS operation is preserved throughout the total input line voltage range therefore maintaining optimum efficiency. Parallel Operation Paralleling modules can be used to increase the output current capability of a single power rail and reduce output voltage ripple. SGND VS1 PGND REM TRK EAO (#1) SGND VS1 PGND REM(#2) EN EAO(#2) TRK(#2) EN(#2) SYNCI SYNCOSYNCI(#2) SYNCO(#2) TRK EAO EN EAO(#1) TRK(#1) EN(#1) PWRGD SYNCI SYNCOSYNCI(#1) SYNCO(#1) VIN VIN VOUT VOUT CIN COUT VIN VIN VOUTCIN COUT PI33xx PI33xx PWRGD Figure 59 — PI33xx-x0 parallel operation

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 34 of 41 06/2017 PI33xx-x0 The PI33xx-x0 default for SYNCI is to sync with respect to the falling edge of the applied clock providing 180° phase shift from SYNCO. This allows for the paralleling of two PI33xx-x0 devices without the need for further user programming or external sync clock circuitry. The user can change the SYNCI polarity to sync with the external clock rising edge via the I 2C™ data bus (PI33xx-20 device versions only). By connecting the EAO pins and SGND pins of each module together the units will share the current equally. When the TRK pins of each unit are connected together, the units will track each other during soft-start and all unit EN pins have to be released to allow the units to start (See Figure 59). Also, any fault event in any regulator will disable the other regulators. The two regulators will be out of phase with each other reducing output ripple (refer to Switching Frequency Synchronization). To provide synchronization between regulators over the entire operational frequency range, the Power Good (PWRGD) pin must be connected to the lead regulator’s (#1) SYNCI pin and a 2.5kΩ Resistor, R1, must be placed between SYNCO (#2) return and the lead regulator’s SYNCI (#1) pin, as shown in Figure 59. In this configuration, at system soft-start, the PWRGD pin pulls SYNCI low forcing the lead regulator to initialize the open-loop startup synchronization. Once the regulators reach regulation, SYNCI is released and the system is now synchronized in a closed- loop configuration which allows the system to adjust, on the fly, when any of the individual regulators begin to enter variable frequency mode in the loop. Multi-phasing three regulators is possible (PI33xx-20 only) with no change to the basic single-phase design. For more information about how to program phase delays within the regulator, please refer to Picor application note PI33xx-2x Multi-Phase Design Guide. I2C™ Interface Operation PI33xx-20 devices provide an I2C digital interface that enables the user to program the EN pin polarity (from high to low assertion) and switching frequency synchronization phase/delay. These are one time programmable options to the device. Also, the PI33xx-20 devices allow for dynamic VOUT margining via I2C that is useful during development (settings stored in volatile memory only and not retained by the device). The PI33xx-20 also have the option for fault telemetry including: ■■ Fast/Slow current limit ■■ Output voltage high ■■ Input overvoltage ■■ Input undervoltage ■■ Over temperature protection For more information about how to utilize the I2C interface please refer to Picor application note PI33xx-2x I2C Digital Interface Guide. Application Description Output Voltage Trim The PI33xx-x0 family of Buck Regulators provides seven common post-package trim step is implemented to offset any resistor divider network errors ensuring maximum output accuracy. With a single resistor connected from the ADJ pin to SGND or REM, each device’s output can be varied above or below the nominal set voltage (with the exception of the PI3311-X0 which can only be above the set voltage of 1V). The remote pin (REM) should always be connected to the VOUT pin, if not used, to prevent an output voltage offset. Figure 60 shows the internal feedback voltage divider network. R1, R2, and R4 are all internal 1.0% resistors and Rlow and Rhigh are external resistors for which the designer can add to modify VOUT to a desired output. The internal resistor value for each regulator is listed below in Table 3. Table 2 — PI33xx-x0 family output voltage range - ADJ REM VOUT SGND Rlow Rhigh 1.0VDC Figure 60 — Internal resistor divider network Device Output Voltage Set Range PI3311-x0 1.0V 1.0 to 1.4V PI3318-x0 1.8V 1.4 to 2.0V PI3312-x0 2.5V 2.0 to 3.1V PI3301-x0 3.3V 2.3 to 4.1V PI3302-x0 5.0V 3.3 to 6.5V PI3303-x0 12V 6.5 to 13.0V PI3305-x0 15V 10.0 to 16.0V

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 36 of 41 06/2017 PI33xx-x0 Inductor Pairing The PI33xx-x0 utilizes an external inductor. This inductor has been optimized for maximum efficiency performance. Table 4 details the specific inductor value and part number utilized for each PI33xx-x0 device which are available from Coiltronics and Eaton. Data sheets are available at: http://www.cooperindustries.com Thermal Derating Thermal de-rating curves are provided that are based on component temperature changes versus load current, input voltage and air flow. It is recommended to use these curves as a guideline for proper thermal de-rating. These curves represent the entire system and are inclusive to both the PI33xx-x0 regulator and the external inductor. Maximum thermal operation is limited by either the MOSFETs or inductor depending upon line and load conditions. Thermal measurements were made using a standard PI33xx-x0 Evaluation board which is 3 x 4 inches in area and uses 4-layer, 2oz copper. Thermal measurements were made on the three main power devices, the two internal MOSFETs and the external inductor, with air flows of 0, 200, and 400LFM. Filter Considerations The PI33xx-x0 requires input bulk storage capacitance as well as low impedance ceramic X5R input capacitors to ensure proper start up and high frequency decoupling for the power stage. The PI33xx-x0 will draw nearly all of the high frequency current from the low impedance ceramic capacitors when the main high side MOSFET is conducting. During the time the high side MOSFET is off, they are replenished from the bulk capacitor. If the input impedance is high at the switching frequency of the converter, the bulk capacitor must supply all of the average current into the converter, including replenishing the ceramic capacitors. This value has been chosen to be 100μF so that the PI33xx-x0 can start up into a full resistive load and supply the output capacitive load with the default minimum soft start capacitor when the input source impedance is 50Ω at 1MHz. The ESR for this capacitor should be approximately 20mΩ. The RMS ripple current in this capacitor is small, so it should not be a concern if the input recommended ceramic capacitors are used. Table 5 shows the recommended input and output capacitors to be used for the various models as well as expected transient response, RMS ripple currents per capacitor, and input and output ripple voltages. Table 6 includes the recommended input and output ceramic capacitors. Table 4 — PI33xx-x0 Inductor pairing Device VIN (V) ILOAD (A) CINPUT Ceramic X5R CINPUT Bulk Elec. COUTPUT Ceramic X5R CINPUT Ripple Current (IRMS) COUTPUT Ripple Current (IRMS) Input Ripple (mVpp) Output Ripple (mVpp) Output Ripple (mVpp) Recovery Time (µs) Load Step (A) (Slew/µs) PI3311 24 10 4 x 4.7μF 50V 100μF 50V

8 X 100μF

2 X 1μF

1 X 0.1μF 0.5 0.8 120 20 ±40 40 5 (5A/μs)5 100 15 PI3318 24 10 4 x 4.7μF 100μF 50V

6 X 100μF

1 X 0.1μF 0.5 0.8 120 20 ±40 40 5 (5A/μs)5 100 15 PI3312 24 4 x 4.7μF 100μF 50V

4 X 100μF

1 X 0.1μF 1 1.75 150 50 ±80 25 5 (10A/μs)5 100 24 PI3301 24 4 x 4.7μF 100μF 50V 1 X 0.1μF 1.05 1.625 200 40 ±100 20 5 (10A/μs)5 125 33 PI3302 24 4 x 4.7μF 100μF 50V

4 X 47μF

1 X 0.1μF 1.2 1.5 220 50 ±170 30 5 (5A/μs)5 140 30 PI3303 24 4 x 4.7μF 100μF 50V

4 X 22μF

1 X 0.1μF 1.3 1.36 275 100 ±300 30 4 (10A/μs)4 150 60 PI3305 24 4 x 4.7μF 100μF 50V 1 X 0.1μF 1.38 1.2 280 150 ±400 30 4 (10A/μs)4 160 75 Table 5 — Recommended input and output capacitance Device Inductor [nH] Inductor Part Number Manufacturer PI3311-x0 125 FPV1006-125-R Eaton PI3318-x0 150 FPV1006-150-R Eaton PI3312-x0 200 FPT705-200-R Coiltronics PI3301-x0 200 FPT705-200-R Coiltronics PI3302-x0 200 FPT705-200-R Coiltronics PI3303-x0 230 FPT705-230-R Coiltronics PI3305-x0 230 FPT705-230-R Coiltronics

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 38 of 41 06/2017 PI33xx-x0 Figure 67 — Recommended Receiving PCB footprint Recommended PCB Footprint and Stencil

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 39 of 41 06/2017 PI33xx-x0 DIMESIONAL REFERENCES NOMMINREF. MAX A b L D E e aaa bbb ccc ddd eee 0.08 2.562.50 2.62 0.05 2.57

14.00 BSC

0.550.50 0.60

10.00 BSC

13.00 BSC

9.00 BSC

1.00 BSC

0.150.10 0.20 0.10 0.10 0.08 0.10 0.550.50 0.60

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 40 of 41 06/2017 PI33xx-x0

Revision History

Revision Date Description Page Number(s) 1.5 06/13 Last release in old format n/a 1.6 08/03/15 Reformatted in new template n/a 1.7 08/21/15 Formatting edits 6, 21, 22, 25, 26, 29, 30 & 36 1.8 09/18/15 Formatting edits all 1.9 01/06/16 Clarifications made in Enable Pin Conditions BGA package added 7, 18, 22, 26 & 30 1, 3, 20–23, 34 & 40 2.0 02/22/16 Corrected Input Current spec unit of measure from mA to A 12, 16, 20, 24 & 28 2.1 05/27/16 Revised Output Voltage Total Regulation 12 2.2 08/22/16 Corrected typo in temp range for Electrical Characteristics tables 7, 9, 10, 12, 13, 16, 17, 20, 21, 24, 25, 28 & 29 2.3 11/21/16 Clarified VS1 rating in Absolute Maximum Ratings Table Updated pin description table and package pin-out labels to show VDR capability 2.4 02/10/17 Block diagram typo corrected, VS1 Spec expanded PWRGD Pin Description updated Specification conditions clarified 6, 9 2.5 06/01/17 Move BGA package to separate data sheet Corrections 1, 3, 20-23, 40 1, 6-7, 9-31, 35 Note: page removed in Revision 2.5.

Cool-Power® ZVS Switching Regulators Rev 2.5 Page 41 of 41 06/2017 PI33xx-x0 Vicor Corporation

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Product Information

PI33XX-X0 specifications and overview.

Summary

8V to 36VIN Cool-Power ZVS Buck Regulator Family

Description

8V to 36VIN Cool-Power ZVS Buck Regulator Family

Source title PI33XX-X0_18 Datasheet(PDF) - Vicor Corporation

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