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A4408 Datasheet Adjustable Frequency Buck or Buck-Boost Pre-Regulator

Manufacturer: Allegro Micro Systems

Datasheet Details

Part number A4408
Manufacturer Allegro Micro Systems
File Size 3.29 MB
Description Adjustable Frequency Buck or Buck-Boost Pre-Regulator
Datasheet download datasheet A4408 Datasheet

General Description

The A4408 is power management IC that uses a buck or buck-boost pre-regulator to efficiently convert automotive battery voltages into a tightly regulated intermediate voltage, complete with control, diagnostics, and protections.

The output of the pre-regulator supplies a 5 V / 115 mAMAX tracking/protected LDO, a 3.3 V / 165 mAMAX LDO, a 5 V / 325 mAMAX LDO, and an adjustable output synchronous buck regulator (1.25 VTYP / 700 mADC).

Designed to supply CAN or microprocessor power supplies in high-temperature environments, the A4408 is ideal for underhood applications.

Overview

A4408 Adjustable Frequency Buck or Buck-Boost Pre-Regulator with Synchronous Buck, 3 Internal LDOs, Watchdog Timer, NPOR, and.

Key Features

  • Automotive AEC-Q100 qualified.
  • 2.8 to 36 VIN operating range, 40 VIN maximum.
  • Buck or buck-boost pre-regulator (VREG).
  • Adjustable PWM switching frequency: 250 kHz to 2.4 MHz.
  • PWM frequency can be synchronized to external clock.
  • Adjustable synchronous buck regulator (1.25 VNOM).
  • 3.3V (3V3) and 5V (V5) internal LDO regulators with foldback short-circuit protections.
  • 5V (V5P) internal tracking LDO regulator with foldback short.