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A4409 Datasheet Adjustable Frequency Buck or Buck-Boost Pre-Regulator

Manufacturer: Allegro Micro Systems

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Datasheet Details

Part number A4409
Manufacturer Allegro Micro Systems
File Size 1.40 MB
Description Adjustable Frequency Buck or Buck-Boost Pre-Regulator
Datasheet download datasheet A4409 Datasheet

Overview

A4409 Adjustable Frequency Buck or Buck-Boost Pre-Regulator with 2 LDOs, Window Watchdog Timer, and.

Key Features

  • Automotive AEC-Q100 qualified.
  • VIN operating range from 3 to 36 V, with 40 V 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.
  • Two 5 V internal LDO regulators with foldback short- circuit protection.
  • Power-on reset (NPOR) with fixed delay of 22.5 ms.
  • Programmable window watchdog timer with a fixed activation.

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