A4480: Wide Input 5 V, 50 mA, Automotive Regulator with Output Short-to-Battery Protection and Power OK

The A4480 is a wide input regulator with complete control, diagnostics, and protection features that address many requirements of automotive applications. It includes a boost function to allow operation with input voltages from 3.5 to 28 V, while maintaining a 5 V output voltage. The A4480 is able to supply up to 50 mA of load current.

An enable pin (ENB) allows control of the regulator output. This pin is rated to operate at up to 40 V, so it can be connected directly to a car battery.

Diagnostic output from the A4480 includes an open-drain Power OK (POK) output to alert the microprocessor that a fault has occurred.

Protection features include input undervoltage lockout (UVLO), foldback overcurrent protection, output under/overvoltage protections (UV/OVP), and thermal shutdown (TSD). In addition, the output is protected from a short-to-battery event.

The A4480 device is available in an 8-pin eSOIC package with exposed pad for enhanced thermal dissipation. It is lead (PB) free, with 100% matte tin leadframe plating.


  • Microcontroller power
  • Transceivers (CAN, LIN, etc.) power supplies
  • Sensors

Astrorep Inc. (Allegro and Sanken Semiconductors, Sanken Power Supplies)
141 John Street, Suite 300
Babylon, NY 11702
Phone: (631)422-2500
Fax: (631)422-2504
Web: www.astrorepinc.com
Email: donna.tweedy@astrorepinc.com

If this is not your local representative, find your local sales rep here.

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  • Features and BenefitsFeatures and Benefits
  • PackagingPackaging
  • Technical DocsTechnical Docs
  • NewsNews
  • Automotive AEC-Q100 qualified
  • Wide operating range of 3.5 to 28 V, with 40 V load dump rating
  • Linear regulator output with foldback short-circuit and short-to-battery protection
  • Boost function to maintain output when input is low
  • Power OK (POK) flag
  • High-voltage logic-level enable input (ENB) for microprocessor or ignition control
  • Pin-to-pin and pin-to-ground tolerant at every pin
  • Allegro Sensor Bias LDO
A4480 Packages

Click the image to view larger
A4480 Product Image A4480 Block Diagram A4480 Application

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
A4480KLJTR-T 8-lead SOIC -40°C to 150°C Yes View Data New Contact your
local sales rep
Check Stock
APEK4480KLJ-01-MH DEMO BOARD -40°C to 150°C No -- New Contact your
local sales rep
Check Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

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