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Summary of Contents for Murata pSemi PE25203
- Page 1 PE25203 Evaluation Kit User's Manual Divide-by-2 and -3, 4A Charge Pump, Capacitor Divider ©2023–2025, pSemi Corporation. All rights reserved. • Headquarters: 9369 Carroll Park Drive, San Diego, CA, 92121 Evaluation Kit User's Manual DOC-111189-2 – (02/2025) www.psemi.com...
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Page 2: Table Of Contents
PE25203 EVK User's Manual Table of Contents Introduction ..............3 Evaluation Kit Overview ..............3 Document Overview ..............3 EVK Contents and Requirements ..........4 Kit Contents ................4 Hardware Requirements ............4 Quick Start Guide ............5 Evaluation Board Overview ............5 PCB Headers ................ -
Page 3: Introduction
PE25203 EVK User's Manual Introduction PE25203 is an ultra-high efficiency charge pump capacitor divider that you can configure to divide down an input voltage by two or three and deliver up to 4A output at up to 99% peak efficiency. The PE25203 supports the following input voltage ranges and is available in a WLCSP package: ... -
Page 4: Evk Contents And Requirements
PE25203 EVK User's Manual EVK Contents and Requirements Kit Contents Table 2 lists the hardware required for evaluation. Table 2. EVK Contents Quantity Description Part Number PE25203 DC-DC converter evaluation board assembly EK25203-01 Hardware Requirements To evaluate the performance of the evaluation board, the following equipment is required: ... -
Page 5: Quick Start Guide
PE25203 EVK User's Manual Quick Start Guide The evaluation board is designed to ease your evaluation of the PE25203. This section guides you through the hardware configuration and the start-up procedures. Evaluation Board Overview The evaluation board contains the following: ... -
Page 6: Pcb Headers
PE25203 EVK User's Manual PCB Headers The PE25203 EVK has two types of PCB headers: Three-way PCB headers configure the EVK. Two-way PCB headers enhance the EVK functionality. Configuration PCB headers Before you apply power to the EVK, fit the jumper sockets on the H1 and H2 PCB headers. The settings are loaded at IC power-up. -
Page 7: Pcb Header Functionality
PE25203 EVK User's Manual PCB Header Functionality Some extra functions are added to the EVK. Two-way PCB headers are optional to use. Table 4 lists the two-way PCB headers. To use any of the functions described in Table 4, a jumper should be used to ensure the extra function is enabled. -
Page 8: Evk Connection
PE25203 EVK User's Manual EVK Connection Connect the EVK and the measuring equipment as shown in Figure 3. Figure 3. EVK Connection Example Figure 4 shows the connections for voltage-only measurements. Figure 4. PE25203 EVK Connections to Measure Voltage If the power supply has remote sense capability, use the +SI and -SI pins to sense the input voltage at the VIN IC pins. - Page 9 PE25203 EVK User's Manual Figure 5 shows the connections for voltage and current measurements Figure 5. PE25203 EKV Connections to Measure Voltage and Current ©2023–2025, pSemi Corporation. All rights reserved. • Headquarters: 9369 Carroll Park Drive, San Diego, CA, 92121 Page 9 of 31 DOC-111189-2 –...
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Page 10: Hardware Operation
PE25203 EVK User's Manual Hardware Operation This section includes the general guidelines for operating the EVK. To configure the EVK and achieve optimal performance, follow these steps: Before you power-up the EVK, set the H1 and H2 PCB headers by fitting the jumper sockets. In Figure 6, H1 is in the enable position and H2 is in fixed-frequency mode. -
Page 11: Evk Startup
PE25203 EVK User's Manual EVK Startup When starting the EVK, start it with no load. If the EVK is started with a load, it might not start due to the soft-start current limit. Figure 6. Jumper Configuration ©2023–2025, pSemi Corporation. All rights reserved. • Headquarters: 9369 Carroll Park Drive, San Diego, CA, 92121 Page 11 of 31 DOC-111189-2 –... -
Page 12: Set The Operating Frequency
PE25203 EVK User's Manual Set the Operating Frequency Use the FREQ pin to set the PE25203 operating frequency. To save a resistor, you can also connect the FREQ pin to GND to oscillate at a nominal 200 kHz. This is the oscillation frequency at the VX pin and the charge pump frequency per phase switches at 50% of this value. - Page 13 PE25203 EVK User's Manual Figure 8 shows the location of FREQ resistor R2. The PE25203 EVK uses a 499 KΩ resistor for R2. Figure 8. R2 Location ©2023–2025, pSemi Corporation. All rights reserved. • Headquarters: 9369 Carroll Park Drive, San Diego, CA, 92121 Page 13 of 31 DOC-111189-2 –...
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Page 14: Test Results
PE25203 EVK User's Manual Test Results Figure 9 and Figure 10 show the typical performance of the PE25203 evaluation board at the following nominal voltages: 7.7V for divide-by-2 mode 11.55V for divide-by-3 mode PE25203 Efficiency vs IOUT (Inductor: 100nH, TFM252012ALMAR10MTAA, Fsw=200KHz) Div2 cycle skip Div2 fixed frequency... -
Page 15: Auto-Switch Mode
PE25203 EVK User's Manual Auto-switch Mode Auto-switch mode allows the EVK to automatically change the division ratio by measuring the input voltage. An inverting comparator with hysteresis shown in Figure 11 is implemented to achieve the auto-switch mode of the PE25203 EVK. -
Page 16: Auto-Switch Mode Implementation
PE25203 EVK User's Manual Auto-switch Mode Implementation To implement the auto-switch mode function, place a jumper socket on the H5 and H6 PCB headers and remove the jumper socket from H3. If not using the EVK in auto-switch mode, the H3 header is used for the fixed-division ratio (divide-by-2 (HIGH position) or divide-by-3 (LOW position)). -
Page 17: Excel File Instructions
PE25203 EVK User's Manual Excel File Instructions Table 6 lists the indications in the Excel file, as shown in Figure 14. Table 6. Excel File Indications Color Indication Yellow User interface Blue The V and V voltages are within range. SENSE Green Low percentage of error between the calculated resistor values and the implemented resistor values. -
Page 18: Step 1: Measure The Vdd Voltage From The Evk
PE25203 EVK User's Manual Step 1: Measure the VDD voltage from the EVK Use the VDD test point to measure the VDD voltage from the EVK. Enter this value in the Excel file. Figure 15. VDD Test Point Set the voltage trigger levels Set the voltage levels where the charge pump is required to automatically change the division ratio: ... -
Page 19: Step 2: Tune The Vsense Resistor
PE25203 EVK User's Manual Step 2: Tune the Vsense Resistor Using the Excel file, modify the R9 and R10 values to match their calculated values. R9 and R10 are in series to achieve more resistor values than by using only one resistor at the bottom of the voltage divider network. -
Page 20: Layout Considerations
PE25203 EVK User's Manual Layout Considerations Figure 19 shows the critical components required to implement the PE25203. The highlighted red lines are the high-power nodes in the design. Pay close attention to the parasitic resistance and inductance at these nodes. Figure 19. -
Page 21: Component Placement
PE25203 EVK User's Manual Component Placement Figure 20 shows the PE25203 pin map for the WLCSP. Figure 21 shows a 3D image of the placement of the most critical components required to implement the PE25203. All components are placed on the top layer of the PCB. In the PE25203 EVK, the IC is placed as shown in Figure 21 where the V voltage is on the right side and the VX voltage (the IC output voltage that must be filtered) is on the left side. -
Page 22: Pcb Layout Information
PE25203 EVK User's Manual PCB Layout Information Figure 22 shows the PCB routing of the IC. Wide traces reduce the resistance and multiple vias connect the different layers, thus improving the vertical connection and reducing the parasitic inductance. Figure 22. PE25203 PCB Routing Example Figure 23–Figure 27 show a Type-III PCB layout example using a 4-layer board. - Page 23 PE25203 EVK User's Manual Figure 23. Top Layer Figure 24. Inner Copper Layer 1 ©2023–2025, pSemi Corporation. All rights reserved. • Headquarters: 9369 Carroll Park Drive, San Diego, CA, 92121 Page 23 of 31 DOC-111189-2 – (02/2025) www.psemi.com...
- Page 24 PE25203 EVK User's Manual Figure 25. Inner Copper Layer 2 Figure 26. Bottom Copper Layer ©2023–2025, pSemi Corporation. All rights reserved. • Headquarters: 9369 Carroll Park Drive, San Diego, CA, 92121 Page 24 of 31 DOC-111189-2 – (02/2025) www.psemi.com...
- Page 25 PE25203 EVK User's Manual Figure 27. Top Layer Silkscreen ©2023–2025, pSemi Corporation. All rights reserved. • Headquarters: 9369 Carroll Park Drive, San Diego, CA, 92121 Page 25 of 31 DOC-111189-2 – (02/2025) www.psemi.com...
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Page 26: Functional Block Diagram
PE25203 EVK User's Manual Functional Block Diagram Figure 28 shows the PE25203 functional block diagram. Figure 28. PE25203 Functional Block Diagram ©2023–2025, pSemi Corporation. All rights reserved. • Headquarters: 9369 Carroll Park Drive, San Diego, CA, 92121 Page 26 of 31 DOC-111189-2 –... -
Page 27: Evk Pcb Schematics
PE25203 EVK User's Manual EVK PCB Schematics Figure 29 shows the EVK PCB schematic. Figure 29. Charge Pump Circuit Schematic without Auto-switch Mode Circuit ©2023–2025, pSemi Corporation. All rights reserved. • Headquarters: 9369 Carroll Park Drive, San Diego, CA, 92121 Page 27 of 31 DOC-111189-2 –... - Page 28 PE25203 EVK User's Manual Figure 30 shows the auto-switch mode circuit schematic. Figure 30. Auto-switch Mode Circuit Schematic ©2023–2025, pSemi Corporation. All rights reserved. • Headquarters: 9369 Carroll Park Drive, San Diego, CA, 92121 Page 28 of 31 DOC-111189-2 – (02/2025) www.psemi.com...
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Page 29: Application Circuit Part List
PE25203 EVK User's Manual Application Circuit Part List Table 7 lists the recommended components. Table 7. Recommended Components Reference Value Description Part Number Required components 1 µF CAP CER 1UF 6.3V X7R 0402 GRM155R70J105KA12D C4,C5,C6,C7,C10,C11,C 10 µF GRM188R61E106KA73D CAP CER 10UF 25V X5R 0603 12,C13,C14,C15,C16,C1 7,C18,C19,C20,C21 C8,C9... - Page 30 PE25203 EVK User's Manual SI -, SO -, GND PC TEST POINT MULTIPURPOSE BLACK 5011 EN,MODE,PGOOD,FF,V PC TEST POINT MULTIPURPOSE WHITE 5012 DD,FREQ,EXT_VDD GND1,GND2,GND3,GN TP SMT PC TEST POINT COMPACT SMT 5016 D4,GND5 – CONN HEADER VERT 4POS 2.5MM DF1BZ-4P-2.5DSA ©2023–2025, pSemi Corporation.
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Page 31: Technical Resources
PE25203 EVK User's Manual Technical Resources Additional technical resources are available for download in the Products section at www.psemi.com. These include the product specification datasheet, S-parameters, zip file, evaluation kit schematic, bill of materials, material declaration form, and PC-compatible software file. Trademarks are subject to trademark claims.
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