ISL85403FRZ-T

Voltage Regulators - DC DC Switching Regulators Overview

The ISL85403FRZ-T is a synchronous switching voltage regulator from Renesas Electronics, designed for wide input voltage applications. It supports both synchronous buck and two-stage boost-buck topologies within a single device. The component operates with an input voltage range of 3 V to 40 V and delivers a maximum output current of 2.5 A. The adjustable output voltage spans from 800 mV to 33 V. It features a programmable switching frequency between 200 kHz and 2.2 MHz. The device includes a shutdown function and maintains a typical operating supply current of 1.3 mA. It is housed in a QFN-EP-20 package and functions reliably across a temperature range of -40°C to +105°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Supports dual topology configurations including synchronous buck and two-stage boost-buck converters.
• Enables flexible power design through a wide input voltage range suitable for various bus voltages.
• Integrates internal power FETs to minimize external component count and board space.
• Provides adjustable switching frequencies to optimize efficiency and filter size requirements.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation in industrial systems with wide input voltage ranges
• Power management for automotive electronics requiring robust input tolerance
• Battery-powered equipment utilizing boost-buck conversion for stable output
• Communication infrastructure powering components with variable supply needs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against official Renesas documentation to confirm tape-and-reel packaging specifications. Ensure the part number matches the exact thermal pad configuration required for your PCB layout. Cross-reference the datasheet revision date to validate parameter accuracy before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing circuits that require both step-up and step-down capabilities from a single regulator IC. Consider the thermal performance of the QFN-EP-20 package for high-current applications. Evaluate the need for external compensation components based on the chosen switching frequency and load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the ISL85403 series of mixed-signal power management integrated circuits. It is manufactured by Renesas Electronics Corporation, formerly Intersil. The series targets applications needing efficient power conversion in compact form factors. It complements other PMIC offerings by providing versatile topology support.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Consult official Renesas cross-reference lists for verified substitutes. Verify pin compatibility and electrical parameters before considering alternative manufacturers. Ensure any replacement supports the same dual-topology functionality if required by the design.