A4491EESTR-T - Allegro MicroSystems

Manufacturer Part Number

A4491EESTR-T

Manufacturer

Allegro Microsystems

Introduction

The A4491EESTR-T is a step-down DC-DC switching regulator designed to provide an adjustable output from a higher input voltage.

Product Features and Performance

Step-Down Voltage Regulator

Adjustable Output Voltage

Topology: Buck

Three Output Channels

Surface Mount Technology

Packaging: Tape & Reel for automated assembly

Product Advantages

High Input Voltage Range: 4.5V to 23V

Adjustable Output: 0.8V to 20.7V

Supports SMD mounting with 20-WFQFN Exposed Pad

Capable of operating at 550kHz switching frequency

Designed for use in commercial temperature ranges (-40°C to 85°C)

Key Technical Parameters

Input Voltage (Min): 4.5V

Input Voltage (Max): 23V

Output Voltage (Min/Fixed): 0.8V

Output Voltage (Max): 20.7V

Output Configuration: Positive

Control Method: Voltage Mode PWM

Number of Outputs: 3

Switching Frequency: 550kHz

Synchronous Rectifier: No

Temperature Range: -40°C to 85°C

Quality and Safety Features

Thermal Overload Protection

Designed for reliable operation in a wide range of temperatures

Compatibility

Compatible with 20-QFN-EP (4x4) pad layouts

Suitable for use with multiple input and output voltage configurations

Application Areas

Power supply modules

Consumer electronics

Industrial controls

Telecommunication equipment

Product Lifecycle

Product Status: Active

No indication of near-term discontinuation

Replacements or upgrades should be available as standard with Allegro Microsystems' product evolution

Several Key Reasons to Choose This Product

High versatility in input and output voltage compatibility

Flexible for use in a broad range of applications

Robust design suitable for harsh environments

High-frequency switching allows for smaller external components

Available in quantity with Tape & Reel packaging for efficient assembly

Allegro Microsystems' reputation for reliability and quality in power management products