A4481

A4481 5 VOUT , 50 mA Automotive Linear Regulator with 50 V Load Dump and Short-to-Battery Protection FEATURES AND BENEFITS 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 Package: 8-pin SOIC with exposed thermal pad (suffix LJ) DESCRIPTION The A4481 is a single low-dropout linear regulator with complete control, diagnostics, and protection features that address many requirements of automotive applications. It regulates input voltages from 5.25 to 40 V, down to 5 V ±1% output voltage and is able to supply up to 50 mA of load current. Diagnostic output from the A4481 includes Power OK (POK) output to alert the microprocessor that a fault has occurred. Protection features include input undervoltage lockout (UVLO), foldback overcurrent protection, output undervoltage and overvoltage protections (UV/OVP), and thermal shutdown (TSD). In addition, the output is protected from a short-tobattery event up to 32 V. The A4481 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. Not to scale APPLICATIONS Power supplies ...