ISL85403FRZ

Voltage Regulators - DC DC Switching Regulators Overview

The ISL85403FRZ is a synchronous switching voltage regulator manufactured by Renesas Electronics Corporation, housed in a QFN-EP-20 package. It supports boost and buck topologies with an input voltage range of 3 V to 40 V and delivers up to 2.5 A output current. The adjustable output voltage spans from 800 mV to 33 V. Operating frequencies are configurable between 200 kHz and 2.2 MHz. The device functions within a temperature range of -40 °C to +105 °C and includes shutdown capability.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Supports synchronous buck and two-stage boost-buck configurations for versatile power conversion
• Enables flexible design through programmable switching frequency selection
• Integrates internal power FETs to minimize external component count

Voltage Regulators - DC DC Switching Regulators Applications

• Low-power wide input voltage point-of-load applications
• Industrial systems requiring regulated DC-DC conversion
• Embedded equipment utilizing the ISL85403EVAL1Z development board

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against official datasheets to confirm pinout and thermal pad specifications. Confirm RoHS compliance status directly with the manufacturer or authorized distributors. Ensure ESD handling protocols are followed during storage and installation due to moisture sensitivity classification. Cross-reference the exact part number with current Renesas documentation to avoid discrepancies.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing circuits requiring both step-up and step-down capabilities within a single IC. The wide input voltage range accommodates various supply sources. Consider the thermal performance of the QFN-EP-20 package for high-current applications. Evaluate the required switching frequency against electromagnetic interference constraints and inductor size requirements.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the ISL85403 series of power management integrated circuits. It is distinct from other regulators like the ISL85410 or ISL85413, which offer different current ratings and fixed frequencies. The FRZ designation indicates the specific tape-and-reel packaging variant available from manufacturers.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Consult official substitution lists for direct equivalents. Verify that any alternative maintains the same 20-pin QFN footprint and electrical characteristics.