Allegro MicroSystems, LLC announced the availability of its simple yet robust automotive linear regulator integrated circuit. It offers control, diagnostics, and protection features designed for automotive applications.
Allegro’s A4481 regulates input voltages between 5.25 to 40 V, down to a 5 V ±1% accurate output voltage, and is able to supply up to 50 mA of load current. This new device is designed to power sensors, low power microcontrollers and transceivers in interior and underhood automotive control units.
The diagnostic output from the A4481 includes a Power OK (POK) output. Protection features include output protection from a short-to-battery event up to 32 V, for instance in the case of a wiring harness fault. Protection also includes input undervoltage lockout (UVLO), foldback overcurrent protection, output undervoltage and overvoltage protections (UV/OVP), and thermal shutdown (TSD).
The A4481KLJTR-T device is available in an 8-pin SOIC package with exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte-tin leadframe plating.
Features
- Automotive AEC-Q100 qualified
- 5.25 to 40 VIN operating range, 50 V load dump rating
- 5 V ±1% internal LDO regulator
- Foldback short-circuit protection
- Short-to-battery protection (to 32 V, independent of VIN) for harness faults
- Power OK (POK) flag
- High-voltage logic level enable input (ENB) for microprocessor control or connection directly to battery
- Pin-to-pin and pin-to-ground tolerant at every pin
Advertisement
Learn more about Allegro MicroSystems
