ISL8225MEVAL3Z INTERSIL | Alldatasheet

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1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. Copyright Intersil Americas Inc. 2012. All Rights Reserved. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. risks while dramatically improving time to market. power density and better efficiency than competing solutions. reduces ripple currents, BOM costs, and complexity. adjusted to different voltages.

  • 0V to 20V power supply with at least 10A source current capability
  • Electronic load capable of sinking current up to 30A
  • Digital multimeters (DMMs)
  • 100MHz quad-trace oscilloscope Quick Start The inputs are J1 (VIN) and J2 (GND). The outputs are J3 (VOUT) and J4 (GND). Refer to Figure 1 for connections. 1. Connect a power supply capable of sourcing at least 10A to the input (VIN J1 and GND J2) of the ISL8225MEVAL3Z evaluation board, with a voltage between 4.5V to 20V. Connect an electronic load or the device to be powered to the output (VOUT J3 and GND J4) of the board. All connections, especially the low voltage, high current V OUT lines, should be able to carry the desired load current and should be made as short as possible. 2. Turn on the power supply. Measure the output voltage, V OUT, which should be at 1.2V if the board is working properly. 3. The ISL8225MEVAL3Z is manufactured with a default VOUT value of 1.2V; if different output voltages are desired, board resistors can be exchanged to provide the desired VOUT. Please refer to the table printed on the backside of the evaluation board or Table 1 on page 2 for RVSET resistor values, which can be used to produce different output voltages. See how-to video at intersil.com/ evid01

FIGURE 1. ISL8225MEVAL3Z BOARD IMAGE

For VIN < 5.5V, please tie VIN directly to VCC for best efficiency. to achieve better stability. components, including the solder attachment, are lead-free. room temperature without additional cooling systems needed. determine the output current available.

  1. Use the top and bottom layers to carry the large current.
  2. Phase 1 and Phase 2 pads are switching nodes that generate
  3. To avoid noise coupling, we recommend adding 470pF
  4. If the ambient temperature is high or the board space is

TABLE 1. RESISTANCE SETTING FOR DIFFERENT OUTPUT VOLTAGES

1.2 Default Default Default

FIGURE 2. ISL8225MEVAL3Z BOARD SCHEMATIC

FIGURE 7. BOTTOM LAYER FIGURE 8. BOTTOM COMPONENTS

6 AN1790.0 December 3, 2012 Bill of Materials PART NUMBER REF DES QTY. VALUE TOL. VOLTAGE POWER PACKAGE TYPE JEDEC TYPE MANUFACTURER DESCRIPTION 108-0740-001 J1-J4 4 CONN BAN-JACK Johnson Components Standard type banana jack 10TPB330M C15 1 330µF 20% 10V SMD CAP_7343_149 SANYO-POSCAP St andard solid electrolytic chip tantalum SMD capacitor 5002 TP1-TP10 10 THOLE MTP500X Keystone Miniature white test point 0.100 pad 0.040 Thole EEE1EA471P C1 1 470µF 20% 25V SMD CAPAE_393X402 Panasonic Alumi num electrolytic S series type V capacitor (RoHS compliant) GRM32ER71E226KE15L C2-C5 4 22µF 10% 25V 1210 CA P_1210 Murata Ceramic chip capacitor H1045-00102-50V10-T C7 1 1000pF 10% 50V 603 CAP_0603 Generic Multilayer capacitor H1045-00471-50V10 C8, C16 2 470pF 10% 50V 603 CAP_0603 Generic Multilayer capacitor H1045-00475-6R3V10-T C6 1 4.7µF 10% 6.3V 603 CAP_0603 Generic Multilayer capacitor H1045-OPEN C9 1 OPEN 5% OPEN 603 CAP_0 603 Generic Multilayer capacitor H1046-00476-6R3V20-T C10 1 47µF 20% 6.3V 805 CAP_0805 Generic Multilayer capacitor H1065-00107-6R3V20-T C12-C14 3 100µF 20% 6.3V 1206 CAP_1206 Generic Multilayer capacitor H1065-OPEN C11 1 OPEN 5% OPEN 1206 CAP_1 206 Generic Multilayer capacitor H2505-DNP-DNP-1 RFSET 1 DNP 1% DNP 603 RES_0603 Generic Met al film chip resistor (do not populate) H2511-02051-1/10W1-T R2 1 2.05k Ω 1% 1/10W 603 RES_0603 Generic T hick filmchip resistor H2511-01001-1/16W1 R3, RVSET 2 1k Ω 1% 1/16W 603 RES_0603 Generic T hick filmchip resistor H2511-03301-1/16W5 R4 1 3.3k Ω 5% 1/16W 603 RES_0603 Generic T hick filmchip resistor H2511-06041-1/16W1 R1 1 6.04k Ω 1% 1/10W 603 RES_0603 Generic T hick filmchip resistor ISL8225MIRZ M1 1 QFN QFN26_670X 670_ISL8225M Intersil Dual 15A DC/DC power module

cautioned to verify that the Application Note or Technical Brief is current before proceeding. ISL8225MEVAL3Z Efficiency Curves Test conditions at +25°C and no air flow. FIGURE 9. EFFICIENCY CURVES FOR 12V INPUT F IGURE 10. EFFICIENCY CURVES FOR 5V INPUT