Automotive linear regulator IC with built-in diagnostics and protection features

50 V load dump rating with short-to-battery protection

Allegro MicroSystems: The new A4481 from Allegro MicroSystems Europe is an AEC-Q100 qualified linear voltage regulator IC with built-in control, diagnostics and protection features that address the requirements of automotive applications.

The new device regulates input voltages between 5.25 and 40 V down to an output voltage of 5 V ±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 32 V - 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. It is lead (Pb) free, with 100% matt-tin leadframe plating.

About Allegro
Allegro MicroSystems, LLC is a leader in developing, manufacturing and marketing high-performance semiconductors. Allegro's innovative solutions serve high-growth applications within the automotive market, with additional focus on office automation, industrial, and consumer/communications solutions. Allegro is headquartered in Worcester, Massachusetts (USA) with design, applications, and sales support centers located worldwide. Further information about Allegro can be found at www.allegromicro.com

Allegro MicroSystems Europe, headquartered in Chertsey, United Kingdom, is the European sales and marketing operation, and operates a network of representatives and distributors throughout Europe.  Allegro also has an engineering design centre in Edinburgh in Scotland and an application and marketing centre in Annecy in France.