250mW automotive linear regulator integrates diagnostics and protection
The device regulates input voltages between 5.25 and 40V down to an output voltage of 5V ±1%, and is able to supply up to 50 mA of load current. As a result, it will power sensors, low-power microcontrollers and transceivers in automotive control units for interior and under-hood applications.
The diagnostic output from the A4481 includes a “power OK” output, while protection features include output protection from a short-to-battery event up to 32V – in the case of a wiring harness fault, for example – input undervoltage lockout, foldback overcurrent protection, output undervoltage and overvoltage protection, and thermal shutdown.
The A4481KLJTR-T is available in an 8-pin SOIC package with exposed pad for enhanced thermal dissipation. [data sheet]
Allegro MicroSystems; www.allegromicro.com