RHFL4913SCA1

Overview

The RHFL4913SCA1 is a radiation-hardened positive adjustable linear voltage regulator designed for high-reliability applications in aerospace and nuclear environments. It supports an output current of up to 3A with an adjustable output range from 1.23V to 9V, operating from an input voltage up to 12V. This regulator includes specialized features such as adjustable overcurrent limitation, remote sensing, and SET characterization for stable performance in harsh radiation fields.

Why Choose This Part

This regulator offers robust protection mechanisms including programmable short-circuit current and overtemperature protection. Its low dropout voltage of 0.95V at 2A current allows for efficient regulation even with narrow input-to-output differentials. The inclusion of TTL-compatible inhibit control and output overload monitoring simplifies integration into complex power sequencing designs.

Applications

Getting Started

When designing with the RHFL4913, ensure the SMD5C package is properly thermally coupled to the PCB or chassis to manage heat dissipation at 3A loads. Consult the STMicroelectronics Rad-Hard databook for specific Single Event Transient (SET) and Total Ionizing Dose (TID) performance curves. Use low-ESR capacitors as specified in the datasheet to maintain stability across the full operating temperature range of -55C to +125C.

RHFL4913 Family

Comparing specs that differ across variants. The current part is highlighted.

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