Allegro MicroSystems A4402KLPTR-T

Overview

A4402KLPTR-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 16-pin eTSSOP package with exposed thermal pad.

Compared with the E-temperature version, A4402KLPTR-T is the higher-temperature K version intended for more demanding operating environments. For engineers reviewing the A4402KLPTR-T datasheet, A4402KLPTR-T pinout, A4402KLPTR-T application, or A4402KLPTR-T equivalent, this device is suitable for wide-input embedded control and automotive-style power-supply designs.

Technical Context

In embedded control systems, A4402KLPTR-T converts a higher system supply into regulated rails used by microcontrollers, DSPs, sensors, communication ICs, and support circuitry. The integrated LDO provides a second regulated output for auxiliary loads or local low-noise supply needs.

The device supports a 6 V to 50 V supply range and a 2 MHz switching frequency, making it useful in systems powered from industrial, automotive, or distributed DC rails. Integrated power-on reset and watchdog functions help supervise the powered controller.

A4402KLPTR-T is commonly used in body-control modules, power steering controls, transmission controls, lighting systems, infotainment equipment, printers, industrial controllers, and other microcontroller-based platforms requiring higher temperature capability.

Key Specifications

Pinout & Package

The A4402KLPTR-T pinout supports wide-input buck conversion, integrated LDO regulation, watchdog supervision, power-on reset, enable control, soft-start timing, and feedback configuration. The exposed thermal pad should be connected to a suitable copper area for heat dissipation.

For PCB design, the buck power loop should be compact, with input capacitors close to VIN and ground, short LX and power-component 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.
• K version supports high-temperature operating environments.
• Overcurrent protection, UVLO, and thermal shutdown protection improve reliability.

Applications

Equivalent & Alternatives

When evaluating a A4402KLPTR-T equivalent, engineers should compare regulator topology, output-current capability, package footprint, thermal behavior, sequencing functions, control interface, and long-term sourcing requirements.

Compared with A4402ELPTR-T, A4402KLPTR-T is optimized for higher-temperature operating environments while keeping the same general A4402 dual-output regulator architecture. A4402KLPTR-T vs discrete buck-plus-LDO solutions selection depends on temperature rating, integration level, watchdog/reset requirements, thermal budget, and PCB area constraints.

Quality

A4402KLPTR-T should be sourced as original Allegro MicroSystems components through traceable and controlled supply channels. Quality verification procedures may include package inspection, marking validation, solderability testing, thermal characterization, and electrical output verification according to embedded production requirements.

Because the device operates from wide input voltages and includes switching power conversion, PCB layout, component voltage ratings, thermal copper, watchdog/reset behavior, and transient protection should be validated before production release. Traceable sourcing helps maintain reliable long-term operation and reduce counterfeit supply-chain risk.

Availability

A4402KLPTR-T available at Aetrix Electronics and is suitable for automotive-style, industrial, embedded controller, and commercial power-management platforms requiring stable component availability and repeatable production support.

Supply support may include volume procurement planning, scheduled delivery arrangements, traceable sourcing management, and long-term supply support for OEM, industrial electronics manufacturers, automotive electronics programs, and embedded control production programs.

For production builds, confirming package type, temperature grade, lead time, lifecycle status, output-current requirements, and sourcing continuity helps reduce procurement risk and improve manufacturing stability.

Manufacturer

Allegro MicroSystems is a semiconductor manufacturer specializing in power and sensing solutions for automotive, industrial, consumer, and embedded applications. Its product portfolio includes regulators, motor drivers, magnetic sensors, current sensors, and power-management devices.

For embedded power systems, Allegro regulator products support robust power conversion, monitoring, and system-control functions in demanding electronic platforms where thermal performance, protection features, and supervisory functions are important.

FAQ

What is A4402KLPTR-T used for?

A4402KLPTR-T is used for microcontroller and DSP power supplies, automotive control electronics, industrial control systems, printer electronics, lighting controls, and wide-input embedded power platforms.

Where can I find the A4402KLPTR-T datasheet download?

The A4402KLPTR-T datasheet download is available from Allegro MicroSystems and includes electrical specifications, package details, application circuits, and pin-function information.

What is the difference between A4402KLPTR-T and A4402ELPTR-T?

A4402KLPTR-T is the higher-temperature K version, while A4402ELPTR-T is the E version with a lower operating temperature range.

Does A4402KLPTR-T include an LDO?

Yes. A4402KLPTR-T integrates a buck converter and a linear regulator, providing dual-output regulation in one package.

What are common A4402KLPTR-T equivalent solutions?

Common related solutions include A4402ELPTR-T for lower-temperature applications or discrete buck-plus-LDO designs when integrated supervisory functions are not required.