Allegro MicroSystems A4402ELPTR-T

Overview

A4402ELPTR-T from Allegro MicroSystems is a constant on-time buck converter with an integrated linear regulator designed for microcontrollers, DSPs, automotive electronics, industrial controllers, and embedded power systems. The device combines a 2 MHz switching buck regulator and an LDO in a single 16-pin eTSSOP package with exposed thermal pad.

As a dual-output regulator, A4402ELPTR-T provides adjustable buck and linear regulator outputs, power-on reset, watchdog input, enable control, adjustable soft-start timing, and protection features. For engineers reviewing the A4402ELPTR-T datasheet, A4402ELPTR-T pinout, A4402ELPTR-T application, or A4402ELPTR-T equivalent, this device is suitable for wide-input microcontroller and DSP power-supply designs.

Technical Context

In embedded control systems, A4402ELPTR-T typically converts a higher system supply into regulated rails used by microcontrollers, DSPs, sensors, communication ICs, and support circuitry.

The device supports a 6 V to 50 V supply range, making it useful in systems powered from industrial, automotive, or distributed DC rails. Integrated reset and watchdog functions help supervise the powered controller.

A4402ELPTR-T is commonly used in commercial embedded systems, body-control modules, printers, lighting controls, infotainment systems, power steering controls, transmission controls, and other microcontroller-based platforms.

Key Specifications

Pinout & Package

The A4402ELPTR-T pinout supports wide-input buck conversion, integrated LDO regulation, watchdog supervision, power-on reset, enable control, soft-start timing, and feedback configuration.

For PCB design, the buck power loop should be compact, with input capacitors close to VIN and ground, short LX routing, and careful separation of feedback and watchdog/reset signals from noisy switching nodes.

Key Features

• Constant on-time buck converter with integrated linear regulator.
• 2 MHz switching frequency supports compact external components.
• 6 V to 50 V supply voltage range for wide-input embedded systems.
• Adjustable buck and linear regulator outputs.
• Integrated power-on reset output and watchdog input for controller supervision.
• Overcurrent protection, UVLO, and thermal shutdown protection improve reliability.

Applications

Equivalent & Alternatives

When evaluating a A4402ELPTR-T equivalent, engineers should compare electrical ratings, package, pinout, thermal behavior, control functions, and long-term sourcing requirements.

Quality

A4402ELPTR-T should be sourced as original Allegro MicroSystems components through traceable and controlled supply channels. Quality verification may include package inspection, marking validation, solderability testing, electrical output verification, and thermal validation under expected load conditions.

Because the device operates from wide input voltages and includes switching power conversion, PCB layout, component voltage ratings, thermal copper, and transient protection should be validated before production release.

Availability

A4402ELPTR-T available at Aetrix Electronics and is suitable for embedded controller, automotive-style, industrial, and commercial power-management platforms requiring stable component availability and repeatable production support.

For production builds, confirming package type, temperature grade, lead time, lifecycle status, and sourcing continuity helps reduce procurement and manufacturing risk.

Manufacturer

Allegro MicroSystems is a semiconductor manufacturer specializing in power and sensing solutions for automotive, industrial, consumer, and embedded applications.

FAQ

What is A4402ELPTR-T used for?

A4402ELPTR-T is used for microcontroller and DSP power supplies, automotive electronics, industrial control systems, printer electronics, lighting controls, and wide-input embedded power platforms.

Where can I find the A4402ELPTR-T datasheet download?

The A4402ELPTR-T datasheet download is available from Allegro MicroSystems and includes electrical specifications, package details, application circuits, and pin-function information.

Does A4402ELPTR-T include an LDO?

Yes. A4402ELPTR-T integrates a buck converter and a linear regulator, providing dual-output regulation in one package.

What should be considered in A4402ELPTR-T pinout design?

Prioritize compact buck-loop layout, input capacitor placement, thermal-pad grounding, feedback routing, watchdog/reset signal integrity, and proper separation of switching and control nodes.

What are common A4402ELPTR-T equivalent solutions?

Common related solutions include A4402KLPTR-T for higher temperature requirements or discrete buck-plus-LDO designs when integrated supervisory functions are not required.