PI31XX-0X-HVIZ

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48 Volt Rev 1.3 Page 1 of 22 01/2017 48VIN and 3.3 – 18VOUT, ZVS Isolated DC-DC Converter Modules

48 Volt

The ZVS Isolated Converter Module Series consists of high density isolated DC-DC converters implementing Zero Voltage Switching topology. The 48VIN series operates over a wide input range of 36V to 75V with 3.3V and 12V output models and a narrower range of 41V to 57V at 18V output for PoE and other applications. Both model sets produce 60W of output power, yeilding an unprecedented power density of 400W/in 3. These converter modules are surface mountable and only ~.5” square in area achieving ~50% space reduction versus conventional solutions. A switching frequency of 900kHz allows for small input and output filter components which further reduces the total size and cost of the overall system solution. The output voltage is sensed and fed back to the internal controller using a proprietary isolated magnetic feedback scheme which allows for high bandwidth and good common mode noise immunity. The 48 Volt PI31xx series requires no external feedback compensation and offers a total solution with a minimum number of external components. A rich feature set is offered, including output voltage trim capability, output over-voltage protection, adjustable soft-start, over-current protection with auto-restart, over and under input voltage lockout and a temperature monitoring and protection function that provides an analog voltage proportional to the die temperature as shut down and alarm capabilities. Features & Benefits

• Efficiency up to 89%
• High switching frequency minimizes input filter requirements and reduces output capacitance
• Proprietary “Double-Clamped” ZVS Buck-Boost Topology
• Proprietary isolated magnetic feedback
• Small footprint (0.57in2) enables PCB area savings
• Very low profile (0.265in)
• On/Off Control, positive logic
• Wide trim range +10/-20% for PI3105-00-HVIZ (+10/-10% for other models)
• Temperature Monitor (TM) & Overtemperature Protection (OTP)
• Input UVLO & OVLO and output OVP
• Overcurrent protection with auto restart
• Adjustable soft-start
• 2250VDC input to output isolation

Applications

• Space Constrained Systems
• Isolated Board Level Power
• Network Power Systems
• Telecommunications
• Distributed Power Architecture
• PoE – Power Over Ethernet
• IPoL – Isolated Point of Load Power

Package Information

• Surface Mountable 0.87” x 0.65” x 0.265” package
• Weight = 7.8 grams Device Output Voltage IOUT Max Set Range PI3101-00-HVIZ 3.3V 2.97 to 3.63V 18A PI3105-00-HVIZ 12V 9.6 to 13.2V 5A PI3110-01-HVIZ 18V 16.2 to 19.8V 3.3A

48 Volt Rev 1.3 Page 3 of 22 01/2017 PI31xx-0x-HVIZ Order Information Part Number VIN VOUT IOUT Max Package Transport Media PI3101-00-HVIZ 36 – 75V 3.3V 18A 0.87” x 0.65” x 0.265” TRAY PI3105-00-HVIZ 36 – 75V 12V 5A 0.87” x 0.65” x 0.265” TRAY PI3110-01-HVIZ 41 – 57V 18V 3.3A 0.87” x 0.65” x 0.265” TRAY Also Available PI3109-01-HVIZ 18 – 36V 5V 10A 0.87” x 0.65” x 0.265” TRAY PI3106-01-HVIZ 18 – 36V 12V 4.2A 0.87” x 0.65” x 0.265” TRAY PI3108-00-HVMZ 16 – 50V 3.3V 10A 0.87” x 0.65” x 0.265” TRAY PI3109-00-HVMZ 16 – 50V 5V 10A 0.87” x 0.65” x 0.265” TRAY PI3106-00-HVMZ 16 – 50V 12V 4.2A 0.87” x 0.65” x 0.265” TRAY PI3111-00-HVMZ 16 – 50V 15V 3.33A 0.87” x 0.65” x 0.265” TRAY

48 Volt Rev 1.3 Page 4 of 22 01/2017 PI31xx-0x-HVIZ Absolute Maximum Ratings Name Rating +IN to –IN Max Operating Voltage PI3101-00-HVIZ / PI3105-00-HVIZ -1.0 to 75VDC (operating) PI3110-01-HVIZ -1.0 to 57VDC (operating) +IN to –IN Max Peak Voltage PI3101-00-HVIZ / PI3105-00-HVIZ 100VDC (non-operating, 100ms) PI3110-01-HVIZ 80VDC (non-operating, 100ms) ENABLE to –IN -0.3 to 6.0VDC TM to –IN -0.3 to 6.0VDC TRIM/SS to –IN -0.3 to 6.0VDC +OUT to –OUT See relevant model output section Isolation Voltage (+IN/–IN to +OUT/–OUT) 2250VDC Continuous Output Current See relevant model output section Peak Output Current See relevant model output section Operating Junction Temperature -40 to 125°C Storage Temperature -50 to 125°C Case Temperature During Reflow 245°C Peak Compressive Force Applied to Case (Z-axis) 3lbs (supported by J-lead only)

48 Volt Rev 1.3 Page 5 of 22 01/2017 PI31xx-0x-HVIZ Functional Block Diagram TRIM/SS +OUT SGND -OUT -IN +IN ENABLE TM LFF RSS CSS INT VREF 1.22V RFB1 CFB1 CFB2 + Error Amp Driver DC Slow Current Limit Driver Synchronous Rectifier DC Output OVP DC Input UVP Input OVP DC DC Fast Current Limit Over Temp DC ENB Period Ramp DC Enable +DC On-Duty Ramp ZVS POWER TRAIN -DC Timing Logic FB FB ENB +5V EA Fault DC 120us delay 120us delay Fault Latch And Reset Logic Reset Fault RUN BIAS START BIAS Vcc Temp Sensor ZVS POWER TRAIN ZVS FB TRIM/SS +OUT SGND -OUT -IN +IN ENABLE TM LFF RSS CSS INT VREF 1.22V RFB1 CFB1 CFB2 + Error Amp Driver DC Slow Current Limit Driver Synchronous Rectifier DC Output OVP DC Input UVP Input OVP DC DC Fast Current Limit Over Temp DC ENB Period Ramp DC Enable +DC On-Duty Ramp ZVS POWER TRAIN -DC Timing Logic FB FB ENB +5V EA Fault DC 120us delay 120us delay Fault Latch And Reset Logic Reset Fault RUN BIAS START BIAS Vcc Temp Sensor ZVS POWER TRAIN ZVS FB

48 Volt Rev 1.3 Page 6 of 22 01/2017 PI31xx-0x-HVIZ Package Pin-Out Pin Description U.S. PATS. LISTED ON PACKING MATERIALS & DATASHEETS MADE IN USA DC-DC Converter +IN -IN +OUT -OUT SGND TM TRIM/SS ENABLE Pin Name Description +IN Primary side positive input voltage terminals. –IN Primary side negative input voltage terminals. ENABLE Converter enable option, functions as 5V reference and on / off control pin. Pull low for off. TRIM/SS External soft start pin and trim function. Connect to SGND or ENABLE through resistor for trim up or trim down. TM Temperature measurement output pin. SGND Signal ground, primary side referenced. +OUT Isolated secondary DC output voltage positive terminals. –OUT Isolated secondary DC output voltage negative terminals.

48 Volt Rev 1.3 Page 7 of 22 01/2017 PI31xx-0x-HVIZ Unless otherwise specified: 36V < VIN < 75V, 0A < IOUT < 18A, -40°C < TCASE < 100°C [1] [1] These parameters are not production tested but are guaranteed by design, characterization and correlation with statistical process control. Unless otherwise specified, ATE tests are completed at room temperature. [2] Current flow sourced by a pin has a negative sign. Parameter Symbol Conditions Min Typ Max Unit Input Specifications Input Voltage Range VIN 36 48 75 VDC Input dV/dt [1] VINDVDT VIN = 75V 1.0 V/µs Input Undervoltage Turn-on VUVON IO = 1.8A 32.5 34.0 35.0 VDC Input Undervoltage Turn-off VUVOFF IO = 1.8A 30.5 32.0 33.0 VDC Input Undervoltage Hysteresis VUVH IO = 1.8A 2 VDC Input Overvoltage Turn-on VOVON IO = 1.8A 75.7 78 81.0 VDC Input Overvoltage Turn-off VOVOFF IO = 1.8A 77.7 80.0 82.3 VDC Input Overvoltage Hysteresis VOVH IO = 1.8A 1.6 VDC Input Quiescent Current IQ VIN = 48V, ENABLE = 0V 2.5 mADC Input Idling Power PIDLE VIN = 48V, IOUT = 0A 4 W Input Standby Power PSBY VIN = 48V, ENABLE = 0V 0.120 W Input Current Full Load IIN TCASE = 100°C, IOUT = 18A, ηFL = 86.5% typical, VIN = 48V 1.43 ADC Input Reflected Ripple Current IINRR LIN = 2µH CIN = 47µF 100V electrolytic + 2 x 1µF 100V X7R ceramic 10 mApp Recommended Ext Input Capacitance CIN CIN = 47µF 100V electrolytic + 2 x 1µF 100V X7R ceramic CIN = Cbulk + Chf 49 µF Output Specifications Output Voltage Set Point VOUT IOUT = 9A 3.3 VDC Total Output Accuracy VOA -0ºC < TCASE < 100ºC -3 +3 % -40ºC < TCASE < 0ºC -4 +3 % Output Voltage Trim Range VOADJ -10 10 % Output Current Range IOUT 18 ADC Overcurrent Protection IOCP 18.8 26 34 ADC Efficiency – Full Load ηFL TCASE = 100ºC, VIN = 48V 84.5 86.5 % Efficiency – Half Load ηHL TCASE = 100ºC, VIN = 48V 84.5 % Output OVP Set Point VOVP 3.9 4.1 4.3 VDC Output Ripple Voltage VORPP COUT = 12 x 10µF 10V X7R DC-20MHz 75 mVpp Switching Frequency fSW 900 kHz Output Turn-on Delay Time tONDLY VIN = VUVON to ENABLE = 5V 80 ms Output Turn-off Delay Time tOFFDLY VIN = VUVOFF to ENABLE < 1.8V 10 µs Soft-Start Ramp Time tSS ENABLE = 5V to 90% VOUT CREF = 0 230 µs Maximum Load Capacitance COUT CREF = 1µF, COUT = Al Electrolytic 10000 µF Load Transient Deviation VODV IOUT = 25% step 0.1A/µS COUT = 12 x 10µF 10V X7R 75 mV Load Transient Recovery Time tOVR IOUT = 25% step 0.1A/µS COUT = 12 x 10µF 10V X7R VOUT - 1% 120 µs Maximum Output Power POUT 60 W Absolute Maximum Output Ratings Name Rating +OUT to –OUT -0.5V to 4.5VDC Continuous Output Current 18ADC Peak Output Current 34ADC

48 Volt Rev 1.3 Page 8 of 22 01/2017 PI31xx-0x-HVIZ Parameter Symbol Conditions Min Typ Max Unit ENABLE DC Voltage Reference Output VERO 4.65 4.9 5.15 VDC Output Current Limit [2] IECL ENABLE = 3.3V -3.3 -2.6 -1.9 mADC Start Up Current Limit [2] IESL ENABLE = 1V -120 -90 -60 µA Module Enable Voltage VEME 1.95 2.5 3.05 VDC Module Disable Voltage VEMD 1.8 2.35 2.9 VDC Disable Hysteresis VEDH 150 mV Enable Delay Time tEE 10 µs Disable Delay Time tED 10 µs Maximum Capacitance CEC 1500 pF Maximum External Toggle Rate fEXT 1 Hz TRIM/SS Trim Voltage Reference VREF 1.22 VDC Internal Capacitance CREFI 10 nF External Capacitance CREF 1 µF Internal Resistance RREFI 10 kΩ TM (Temperature Monitor) Temperature Coefficient [1] TMTC 10 mV/ºK Temperature Full Range Accuracy [1] TMACC -5 5 ºK Drive Capability ITM -100 µA TM Output Setting VTM Ambient Temperature = 300ºK 3.00 V Thermal Specification Junction Temperature Shutdown [1] TMAX 130 135 140 ºC Junction-to-Case Thermal Impedance RΘJ-C 3 ºC/W Case-to-Ambient Thermal Impedance RΘC-A Mounted on 9in2 1oz. Cu 6 layer PCB 25°C 8.65 ºC/W Regulatory Specification IEC 60950-1:2005 (2nd Edition) EN 60950-1:2006 IEC 61000-4-2 UL60950-1:2007 CAN/CSA C22.2 NO. 60950-1-07 Recommended Input Fuse Rating IFUSE Fast acting LITTLEFUSE Nano2 Series Fuse 4 10 A [1] These parameters are not production tested but are guaranteed by design, characterization and correlation with statistical process control. Unless otherwise specified, ATE tests are completed at room temperature. [2] Current flow sourced by a pin has a negative sign.

48 Volt Rev 1.3 Page 11 of 22 01/2017 PI31xx-0x-HVIZ Unless otherwise specified: 36V < VIN < 75V, 0A < IOUT < 5A, -40°C < TCASE < 100°C [1] [1] These parameters are not production tested but are guaranteed by design, characterization and correlation with statistical process control. Unless otherwise specified, ATE tests are completed at room temperature. [2] Current flow sourced by a pin has a negative sign. Parameter Symbol Conditions Min Typ Max Unit Input Specifications Input Voltage Range VIN 36 48 75 VDC Input dV/dt [1] VINDVDT VIN = 75V 1.0 V/µs Input Undervoltage Turn-on VUVON IO = 5A 32.5 34.0 35.0 VDC Input Undervoltage Turn-off VUVOFF IO = 5A 30.5 31.5 33 VDC Input Undervoltage Hysteresis VUVH IO = 5A 2.5 VDC Input Overvoltage Turn-on VOVON IO = 5A 75.7 78 81.0 VDC Input Overvoltage Turn-off VOVOFF IO = 5A 77.7 80 82.3 VDC Input Overvoltage Hysteresis VOVH IO = 5A 2 VDC Input Quiescent Current IQ VIN = 48V, ENABLE = 0V 2.5 mADC Input Idling Power PIDLE VIN = 48V, IOUT = 0A 4.1 W Input Standby Power PSBY VIN = 48V, ENABLE = 0V 0.120 W Input Current Full Load IIN TCASE = 100°C, IOUT = 5A, ηFL = 88.5% typical, VIN = 48V 1.412 ADC Input Reflected Ripple Current IINRR LIN = 2µH CIN = 47µF 100V electrolytic + 2 x 1µF 100V X7R ceramic 10 mApp Recommended Ext Input Capacitance CIN CIN = 47µF 100V electrolytic + 2 x 1µF 100V X7R ceramic CIN = Cbulk + Chf 49 µF Output Specifications Output Voltage Set Point VOUT IOUT = 2.5A 12.0 VDC Total Output Accuracy VOA -0ºC < TCASE < 100ºC -3 +3 % -40ºC < TCASE < 0ºC -4 +3 % Output Voltage Trim Range VOADJ -20 10 % Output Current Range IOUT 5 ADC Overcurrent Protection IOCP 5.5 7.9 10 ADC Efficiency – Full Load ηFL TCASE = 100ºC, VIN = 48V 86.5 88.5 % Efficiency – Half Load ηHL TCASE = 100ºC, VIN = 48V 84.0 86.0 % Output OVP Set Point VOVP 13.8 14.5 15.3 VDC Output Ripple Voltage VORPP COUT = 6 x 4.7µF 16V X7R DC-20MHz 175 mVpp Switching Frequency fSW 900 kHz Output Turn-on Delay Time tONDLY VIN = VUVON to ENABLE = 5V 80 ms Output Turn-off Delay Time tOFFDLY VIN = VUVOFF to ENABLE < 1.8V 10 µs Soft-Start Ramp Time tSS ENABLE = 5V to 90% VOUT CREF = 0 230 µs Maximum Load Capacitance COUT CREF = 0.22µF, COUT = Al Electrolytic 1200 µF Load Transient Deviation VODV IOUT = 50% step 0.1A/µS COUT = 6 x 4.7µF 16V X7R 220 mV Load Transient Recovery Time tOVR IOUT = 50% step 0.1A/µS COUT = 6 x 4.7µF 16V X7R VOUT - 1% 120 µs Maximum Output Power POUT 60 W Absolute Maximum Output Ratings Name Rating +OUT to –OUT -0.5V to 16VDC Continuous Output Current 5ADC Peak Output Current 10ADC

48 Volt Rev 1.3 Page 12 of 22 01/2017 PI31xx-0x-HVIZ [1] These parameters are not production tested but are guaranteed by design, characterization and correlation with statistical process control. Unless otherwise specified, ATE tests are completed at room temperature. [2] Current flow sourced by a pin has a negative sign. Parameter Symbol Conditions Min Typ Max Unit ENABLE DC Voltage Reference Output VERO 4.65 4.9 5.15 VDC Output Current Limit [2] IECL ENABLE = 3.3V -3.3 -2.6 -1.9 mADC Start Up Current Limit [2] IESL ENABLE = 1V -120 -90 -60 µA Module Enable Voltage VEME 1.95 2.5 3.05 VDC Module Disable Voltage VEMD 1.8 2.35 2.9 VDC Disable Hysteresis VEDH 150 mV Enable Delay Time tEE 10 µs Disable Delay Time tED 10 µs Maximum Capacitance CEC 1500 pF Maximum External Toggle Rate fEXT 1 Hz TRIM/SS Trim Voltage Reference VREF 1.235 VDC Internal Capacitance CREFI 10 nF External Capacitance CREF 0.22 µF Internal Resistance RREFI 10 kΩ TM (Temperature Monitor) Temperature Coefficient [1] TMTC 10 mV/ºK Temperature Full Range Accuracy [1] TMACC -5 5 ºK Drive Capability ITM -100 µA TM Output Setting VTM Ambient Temperature = 300ºK 3.00 V Thermal Specification Junction Temperature Shutdown [1] TMAX 130 135 140 ºC Junction-to-Case Thermal Impedance RΘJ-C 3 ºC/W Case-to-Ambient Thermal Impedance RΘC-A Mounted on 9in2 1oz. Cu 6 layer PCB 25°C 7.65 ºC/W Regulatory Specification IEC 60950-1:2005 (2nd Edition) EN 60950-1:2006 IEC 61000-4-2 UL60950-1:2007 CAN/CSA C22.2 NO. 60950-1-07 Recommended Input Fuse Rating IFUSE Fast acting LITTLEFUSE Nano2 Series Fuse 4 10 A

48 Volt Rev 1.3 Page 15 of 22 01/2017 PI31xx-0x-HVIZ Unless otherwise specified: 41V < VIN < 57V, 0A < IOUT < 3.3A, -0°C < TCASE < 100°C [1] [1] These parameters are not production tested but are guaranteed by design, characterization and correlation with statistical process control. Unless otherwise specified, ATE tests are completed at room temperature. [2] Current flow sourced by a pin has a negative sign. Parameter Symbol Conditions Min Typ Max Unit Input Specifications Input Voltage Range VIN 41 52 57 VDC Input dV/dt [1] VINDVDT VIN = 57V 1.0 V/µs Input Undervoltage Turn-on VUVON IO = 3.3A 37.1 38.6 40.2 VDC Input Undervoltage Turn-off VUVOFF IO = 3.3A 34.5 36.2 38 VDC Input Undervoltage Hysteresis VUVH IO = 3.3A 2.4 VDC Input Overvoltage Turn-on VOVON IO = 3.3A 57.5 60 62.5 VDC Input Overvoltage Turn-off VOVOFF IO = 3.3A 59 61.3 63.5 VDC Input Overvoltage Hysteresis VOVH IO = 3.3A 1.3 VDC Input Quiescent Current IQ VIN = 52V, ENABLE = 0V 2.5 mADC Input Idling Power PIDLE VIN = 52V, IOUT = 0A 3.3 W Input Standby Power PSBY VIN = 52V, ENABLE = 0V 0.130 W Input Current Full Load IIN TCASE = 100°C, IOUT = 3.3A, ηFL = 89% typical, VIN = 52V 1.28 ADC Input Reflected Ripple Current IINRR LIN = 2µH CIN = 47µF 100V electrolytic + 2 x 1µF 100V X7R ceramic 20 mApp Recommended Ext Input Capacitance CIN CIN = 47µF 100V electrolytic + 2 x 1µF 100V X7R ceramic CIN = Cbulk + Chf 49 µF Output Specifications Output Voltage Set Point VOUT IOUT = 1.65A 18 VDC Total Output Accuracy VOA -0ºC < TCASE < 100ºC -3 +3 % Output Voltage Trim Range VOADJ -10 10 % Output Current Range IOUT 3.3 ADC Overcurrent Protection IOCP 3.8 5.8 9 ADC Efficiency – Full Load ηFL TCASE = 100ºC, VIN = 52V 87.0 89.0 % Efficiency – Half Load ηHL TCASE = 100ºC, VIN = 52V 84.0 86.0 % Output OVP Set Point VOVP 21.7 22.5 23.3 VDC Output Ripple Voltage VORPP COUT = 6 x 2.2µF 25V X7R DC-20MHz 275 mVpp Switching Frequency fSW 900 kHz Output Turn-on Delay Time tONDLY VIN = VUVON to ENABLE = 5V 80 ms Output Turn-off Delay Time tOFFDLY VIN = VUVOFF to ENABLE < 1.8V 10 µs Soft-Start Ramp Time tSS ENABLE = 5V to 90% VOUT CREF = 0 230 µs Maximum Load Capacitance COUT CREF = 0.68µF, COUT = Al Electrolytic 220 µF Load Transient Deviation VODV IOUT = 50% step 0.1A/µS COUT = 6 x 2.2µF 25V X7R 360 mV Load Transient Recovery Time tOVR IOUT = 50% step 0.1A/µS COUT = 6 x 2.2µF 25V X7R VOUT - 1% 100 µs Maximum Output Power POUT 60 W Absolute Maximum Output Ratings Name Rating +OUT to –OUT -0.5V to 24.5VDC Continuous Output Current 4.2ADC Peak Output Current 12ADC

48 Volt Rev 1.3 Page 16 of 22 01/2017 PI31xx-0x-HVIZ [1] These parameters are not production tested but are guaranteed by design, characterization and correlation with statistical process control. Unless otherwise specified, ATE tests are completed at room temperature. [2] Current flow sourced by a pin has a negative sign. Parameter Symbol Conditions Min Typ Max Unit ENABLE DC Voltage Reference Output VERO 4.65 4.9 5.15 VDC Output Current Limit [2] IECL ENABLE = 3.3V -3.3 -2.6 -1.9 mADC Start Up Current Limit [2] IESL ENABLE = 1V -120 -90 -60 µA Module Enable Voltage VEME 1.95 2.5 3.05 VDC Module Disable Voltage VEMD 1.8 2.35 2.9 VDC Disable Hysteresis VEDH 150 mV Enable Delay Time tEE 10 µs Disable Delay Time tED 10 µs Maximum Capacitance CEC 1500 pF Maximum External Toggle Rate fEXT 1 Hz TRIM/SS Trim Voltage Reference VREF 1.23 VDC Internal Capacitance CREFI 10 nF External Capacitance CREF 0.68 µF Internal Resistance RREFI 10 kΩ TM (Temperature Monitor) Temperature Coefficient [1] TMTC 10 mV/ºK Temperature Full Range Accuracy [1] TMACC -5 5 ºK Drive Capability ITM -100 µA TM Output Setting VTM Ambient Temperature = 300ºK 3.00 V Thermal Specification Junction Temperature Shutdown [1] TMAX 130 135 140 ºC Junction-to-Case Thermal Impedance RΘJ-C 3 ºC/W Case-to-Ambient Thermal Impedance RΘC-A Mounted on 9in2 1oz. Cu 6 layer PCB 25°C 10.6 ºC/W Regulatory Specification IEC 60950-1:2005 (2nd Edition) EN 60950-1:2006 IEC 61000-4-2 UL60950-1:2007 CAN/CSA C22.2 NO. 60950-1-07 Recommended Input Fuse Rating IFUSE Fast acting LITTLEFUSE Nano2 Series Fuse 4 10 A

48 Volt Rev 1.3 Page 20 of 22 01/2017 PI31xx-0x-HVIZ TM The TM pin serves as an output indicator of the internal package temperature which is within +/-5°K of the hottest junction temperature. Because of this, it is a good indicator of a thermal overload condition. The output is a scaled, buffered analog voltage which indicates the internal temperature in degrees Kelvin. Upon a thermal overload, the TM pin is pulled low, indicating a thermal fault has occurred. Upon restart of the converter, the TM pin reverts back to a buffered monitor. The thermal shutdown function of the 48 Volt PI31xx is a fault feature which interrupts power processing if a certain maximum temperature is exceeded. TM can be monitored by an external microcontroller or circuit configured as an adaptive fan speed controller so that air flow in the system can be conveniently regulated. SGND The 48 Volt PI31xx SGND pin is the “quiet” control circuitry return. It is basically an extension of the internal signal ground. To avoid contamination and potential ground loops, this ground should NOT be connected to -IN since it is already star connected inside the package. Connect signal logic to SGND. Output Power Pins +OUT And -OUT The output power terminals OUT(+) and OUT(-) deliver the maximum output current from the 48 Volt PI31xx through the J-lead output pins. This configuration allows for a low impedance output and should be connected to multi-layer PCB parallel planes for best performance. Due to the high switching frequency, output ripple and noise can be easily attenuated by adding just a few high quality X7R ceramic capacitors while retaining adequate transient response for most applications. The 48 Volt PI31xx does not require any feedback loop compensation nor does it require any opto-isolation. All isolation is contained within the package. This greatly simplifies the use of the converter and eliminates all outside influences of noise on the quality of the output voltage regulation and feedback loop. It is important for the user to minimize resistive connections from the load to the converter output and to keep stray inductance to a minimum for best regulation and transient response. The very small size footprint and height of the 48 Volt PI31xx allows the converter to be placed in the optimum location to allow for tight connections to the point of load.

48 Volt Rev 1.3 Page 21 of 22 01/2017 PI31xx-0x-HVIZ Package Outline & Recommended PCB Land Pattern Figure 33 — Package Outline & Recommended PCB Land Pattern

48 Volt Rev 1.3 Page 22 of 22 01/2017 PI31xx-0x-HVIZ Contact Us: http://www.vicorpower.com/contact-us Vicor Corporation

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