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Cool-Power® Rev 1.1 vicorpower.com Page 1 of 17 05/2016 800 927.9474 11V to 36VIN, 5 Vout, 15A, Cool-Power ZVS Buck Regulator Cool-Power® PI3302-03 Product Description The PI3302-03 is a high efficiency, wide input range DC-DC ZVS Buck Regulator 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 PI3302-03 model, increases point of load performance providing best in class power efficiency. The PI3302-03 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. *I2C is a trademark of NXP Semiconductors Features & Benefits

  • High Efficiency ZVS-Buck Topology
  • Wide input voltage range of 11V to 36V
  • Output power up to 75W
  • Very fast transient response
  • High accuracy pre-trimmed output voltage
  • User adjustable soft-start & tracking
  • Parallel capable with single wire current sharing
  • Input Over/Undevoltage Lockout (OVLO/UVLO)
  • Output Overvoltage Protection (OVP)
  • Overtemperature Protection (OTP)
  • Fast and slow current limits
  • -40°C to 125°C operating range (TJ)

Applications

  • High efficiency systems
  • Computing, Communications, Industrial, Automotive Equipment
  • High voltage battery operation

Package Information

  • 10mm x 14mm x 2.6mm (LGA SiP) Device Output Voltage IOUT Max Set Range PI3302-03-LGIZ 5.0V 3.3 to 6.5V 15A

Cool-Power® Rev 1.1 vicorpower.com Page 3 of 17 05/2016 800 927.9474 PI3302-03 Order Information 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. Cool-Power Output Range IOUT Max Package Transport MediaSet Range PI3302-03-LGIZ 5.0V 3.3 to 6.5V 15A 10mm x 14mm 123-pin LGA TRAY Name Rating VIN –0.7V to 36V VS1 –0.7 to 36V, –4V for 5ns SGND 100mA PGD, SYNCO, SYNCI, EN, EAO, ADJ, TRK, ADR1, ADR2, SCL, SDA, REM –0.3V to 5.5V / 5mA VOUT –1.5V to 21V 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 Absolute Maximum Ratings Functional Block Diagram Simplified Block Diagram

Cool-Power® Rev 1.1 vicorpower.com Page 4 of 17 05/2016 800 927.9474 PI3302-03 Pin Description Pin Number Pin Name 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. PGD A1 Power Good: High impedance when regulator is operating and VOUT is in regulation. May also be used as “Parallel Good” – see applications section. 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 I 2C 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 K3, A4 No Connect: Leave pins floating. 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: I 2C serial data line. SCL E1 Clock Line: I2C serial clock line. ADR1 H1 Tri-state Address: Supports I2C addressing. Package Pin-Out PGD EAO EN REM VS1 Block 4 VIN Block 3 PGND Block 2 SYNCI SYNCO NC SGND ADJ TRK SDA SCL ADR0 ADR1 K J H G F E D C B A 13 125 4 31 1421 0 9 8 761 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

Cool-Power® Rev 1.1 vicorpower.com Page 5 of 17 05/2016 800 927.9474 PI3302-03

Electrical Characteristics

Specifications apply for the conditions -40°C < TJ < 125°C, VIN = 2 V, L1 = 185nH [1] unless other conditons are noted. Parameter Symbol Conditions Min Typ Max Unit Input Specifications Input Voltage VIN_DC [7] 11 24 36 V Input Current IIN_DC VIN = 24V, TC = 25°C, IOUT = 15A 3.31 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 Input Voltage Slew Rate VIN_SR [2] 1 V/µs Output Specifications Output Voltage Total Regulation VOUT_DC [2] 4.92 5.00 5.08 V Output Voltage Trim Range [3][7] 3.3 6.5 V Line Regulation ∆VOUT(∆VIN) @ 25°C, 11V <VIN <36V 0.10 % Load Regulation ∆VOUT(∆IOUT) @ 25°C, 0.5A <IOUT <15A 0.10 % Output Voltage Ripple VOUT_AC IOUT = 7.5A, COUT = 5 x 47µF 20MHz BW [4] 44 mVp-p Continuous Output Current Range IOUT_DC [5][7] 15 A Current Limit IOUT_CL 18 A Protection VIN UVLO Start Threshold VUVLO_START 9.6 10.4 10.87 V VIN UVLO Stop Threshold VUVLO_STOP 9.3 9.9 10.6 V VIN UVLO Hysteresis VUVLO_HYS 0.50 V VIN OVLO Start Threshold VOVLO_START 36.1 37.6 V VIN OVLO Stop Threshold VOVLO_STOP 37.0 38.4 V VIN OVLO Hysteresis VOVLO_HYS 0.8 V VIN UVLO/OVLO Response Time tf 500 ns Output Over Voltage Protection VOVP Above VOUT 20 % Over-Temperature Fault Threshold TOTP [2] 130 135 140 °C Over-Temperature Restart Hysteresis TOTP_HYS 30 °C Timing Switching Frequency fS [6] 0.800 MHz Fault Restart Delay tFR_DLY 36 ms Sync In (SYNCI) Synchronization Frequency Range ∆fSYNCI Relative to set switching frequency [3] 50 110 % SYNCI Threshold VSYNCI 2.5 V

Cool-Power® Rev 1.1 vicorpower.com Page 6 of 17 05/2016 800 927.9474 PI3302-03 [1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI3302-03 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] VIN – VOUT must be 5V or more to avoid a minimum load requirement of 3mA. Regulator must be disabled if VIN – VOUT is less than 1V. Specifications apply for the conditions -40°C < TJ < 125°C, VIN = 24V, L1 = 185nH [1] unless other conditons are noted. Parameter Symbol Conditions Min Typ Max Unit 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 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, unfaulted) VEN_PU 2 V Enable Pull-Down Voltage (floating, faulted) V EN_PD 0 V Source Current IEN_SO -50 µA Sink Current IEN_SK 50 µA PGD PGD Rising Threshold VPG_HI% [2] 79 85 91 % VOUT_DC PGD Falling Threshold VPG_LO% [2] 77 83 89 % VOUT_DC PGD Output Low VPG_SAT Sink = 4mA [2] 0.4 V

Cool-Power® Rev 1.1 vicorpower.com Page 9 of 17 05/2016 800 927.9474 PI3302-03 Functional Description The PI3302-03 is a highly integrated ZVS-Buck regulator. The PI3302-03 has a set output voltage that can be trimmed within a prescribed range shown on page 1. Performance and maximum output current are characterized with a specific external power inductor (see Table 4). For basic operation, Figure 11 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 0.8V DC 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 11, 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 C OUT 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 (f S). The PI3302-03 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 PI3302-03 devices without the need for further user programming or external sync clock circuitry. When using the internal oscillator, the SYNCO pin provides a 5V clock that can be used to sync other regulators. Therefore, one PI3302-03 can act as the lead regulator and have one additional PI3302-03 running in parallel and interleaved. Soft-Start The PI3302-03 includes an internal soft-start capacitor to control the rate of rise of the output voltage. See “Electrical Characteristics” for the default value. 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 PI3302-03 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 V OUT. The Table 1 defines the voltage range for the PI3302-03. Output Current Limit Protection PI3302-03 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 (I OUT_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: PI3302-03 monitors the regulator inductor current pulse-by-pulse to prevent the output from supplying very high current due to sudden low impedance short. 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. Input Undervoltage Lockout If V IN falls below the input Undervoltage Lockout (UVLO) threshold, but remains high enough to power the internal bias supply, the PI3302-03 will complete the current cycle and stop switching. The system will restart once the input voltage is reestablished and after the Fault Restart Delay. Input Overvoltage Lockout If V IN exceeds the input Overvoltage Lockout (OVLO) threshold (VOVLO), while the controller is running, the PI3302-03 will complete the current cycle and stop switching. The system will resume operation after the Fault Restart Delay. EN SGND VIN VIN VOUT SYNCI VS1 VOUT PGND SYNCO REM TRK ADJ EAO PI33xxCIN COUT Figure 11 — ZVS Buck-Boost with required components Device Output Voltage Set Range PI3302-03-LGIZ 5.0V 3.3 to 6.5V Table 1 — PI3302-03 output adjustment range

Cool-Power® Rev 1.1 vicorpower.com Page 12 of 17 05/2016 800 927.9474 PI3302-03 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 Picor 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 PI3302-03 Evaluation board which is 3x4 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 400 LFM. I 2C Operation The PI3302-03 provides an I2C digital interface that enables the user to program EN pin polarity, frequency synchronization phase/delay, dynamic margining and fault monitoring. The fault telemetry that can be monitored is: n Input under and over voltage (UV/OV) n Output voltage too high n Fast and slow current limit n Over temperature protection Please refer to PI33XX-2X I2C Digital Interface Guide for details. Filter Considerations The PI3302-03 requires low impedance ceramic X5R input capacitors to ensure proper start up and high frequency decoupling for the power stage. The PI3302-03 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 source. If the source impedance is high at the switching frequency of the converter, a bulk capacitor may be necessary. This value has been chosen to be 100µF so that the PI3302-03 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 50 Ohms at 1MHz. If it is used, it should be decoupled from the ceramic capacitors using a 200nH inductor rated for the maximum input current. A parallel damping resistor of 1 Ohm is also recommended. Table 4 shows the recommended input and output capacitors to be used for the PI3302-03 as well as expected transient response, RMS ripple currents per capacitor, and input and output ripple voltages. Table 5 includes the recommended input and output ceramic capacitors. Table 4 — Recommended input and output capacitance Part Number Description Part Number Description GRM188R71C105KA12D - Murata 1µF 16V 0603 X7R C3216X5R1H106K160AB - TDK 10µF 50V 1206 X7R GRM319R71H104KA01D - Murata 0.1µF 50V 1206 X7R GRM31CR61A476ME15L - Murata 47µF 10V 1206 X5R Table 5 — Recommended capacitor types 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) Transient Deviation (mVpk) Recovery Time (µs) Load Step (A) (Slew/µs) PI3302-03 24 15 4 x 4.7µF 50V 100µF 50V 6 X 10µF 1.2 1.5 220 60 -/+170 30 7.5 (5A/µs)

Cool-Power® Rev 1.1 vicorpower.com Page 14 of 17 05/2016 800 927.9474 PI3302-03 Recommended PCB Footprint and Stencil Figure 20 — Details the recommended receiving footprint for PI3302-03 10mm x 14mm package. All pads should have a final copper size o f 0.55mm x 0.55mm, whether they are solder-mask defined or copper defined, on a 1mm x 1mm grid. All stencil o penings are 0.45mm when using either a 5 mil or 6 mil stencil.

Cool-Power® Rev 1.1 vicorpower.com Page 15 of 17 05/2016 800 927.9474 PI3302-03 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® Rev 1.1 vicorpower.com Page 16 of 17 05/2016 800 927.9474 PI3302-03

Revision History

Revision Date Description Page Number(s) 1.0 05/05/2016 Initial Release n/a 1.1 05/13/2016 Change PGD description 4 & 10

Cool-Power® Rev 1.1 vicorpower.com Page 17 of 17 05/2016 800 927.9474 PI3302-03 Vicor’s comprehensive line of power solutions includes high density AC-DC and DC-DC modules and accessory components, fully configurable AC-DC and DC-DC power supplies, and complete custom power systems. Information furnished by Vicor is believed to be accurate and reliable. However, no responsibility is assumed by Vicor for its use. Vicor makes no representations or warranties with respect to the accuracy or completeness of the contents of this publication. Vicor reserves the right to make changes to any products, specifications, and product descriptions at any time without notice. Information published by Vicor has been checked and is believed to be accurate at the time it was printed; however, Vicor assumes no responsibility for inaccuracies. Testing and other quality controls are used to the extent Vicor deems necessary to support Vicor’s product warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. Specifications are subject to change without notice. Vicor’s Standard Terms and Conditions All sales are subject to Vicor’s Standard Terms and Conditions of Sale, which are available on Vicor’s webpage or upon request. Product Warranty In Vicor’s standard terms and conditions of sale, Vicor warrants that its products are free from non-conformity to its Standard Specifications (the “Express Limited Warranty”). This warranty is extended only to the original Buyer for the period expiring two (2) years after the date of shipment and is not transferable. UNLESS OTHERWISE EXPRESSLY STATED IN A WRITTEN SALES AGREEMENT SIGNED BY A DULY AUTHORIZED VICOR SIGNATORY, VICOR DISCLAIMS ALL REPRESENTATIONS, LIABILITIES, AND WARRANTIES OF ANY KIND (WHETHER ARISING BY IMPLICATION OR BY OPERATION OF LAW) WITH RESPECT TO THE PRODUCTS, INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES OR REPRESENTATIONS AS TO MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE, INFRINGEMENT OF ANY PATENT, COPYRIGHT, OR OTHER INTELLECTUAL PROPERTY RIGHT, OR ANY OTHER MATTER. This warranty does not extend to products subjected to misuse, accident, or improper application, maintenance, or storage. Vicor shall not be liable for collateral or consequential damage. Vicor disclaims any and all liability arising out of the application or use of any product or circuit and assumes no liability for applications assistance or buyer product design. Buyers are responsible for their products and applications using Vicor products and components. Prior to using or distributing any products that include Vicor components, buyers should provide adequate design, testing and operating safeguards. Vicor will repair or replace defective products in accordance with its own best judgment. For service under this warranty, the buyer must contact Vicor to obtain a Return Material Authorization (RMA) number and shipping instructions. Products returned without prior authorization will be returned to the buyer. The buyer will pay all charges incurred in returning the product to the factory. Vicor will pay all reshipment charges if the product was defective within the terms of this warranty. Life Support Policy VICOR’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS PRIOR WRITTEN APPROVAL OF THE CHIEF EXECUTIVE OFFICER AND GENERAL COUNSEL OF VICOR CORPORATION. As used herein, life support devices or systems are devices which (a) are intended for surgical implant into the body, or (b) support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the user. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness. Per Vicor Terms and Conditions of Sale, the user of Vicor products and components in life support applications assumes all risks of such use and indemnifies Vicor against all liability and damages. Intellectual Property Notice Vicor and its subsidiaries own Intellectual Property (including issued U.S. and Foreign Patents and pending patent applications) relating to the products described in this data sheet. No license, whether express, implied, or arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Interested parties should contact Vicor’s Intellectual Property Department. Vicor Corporation

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North Smithfield, RI 02896 USA email Customer Service: custserv@vicorpower.com Technical Support: apps@vicorpower.com The products described on this data sheet are protected by the following U.S. Patents Numbers: RE 40,072, 6,421,262, 8,669,744