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LMR14050SDDAR

TILMR14050SDDAR

Texas Instruments
Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 5A 8-PowerSOIC (0.154", 3.90mm Width)
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Overview

The LMR14050SDDAR is a 40V, 5A step-down buck regulator designed for high-efficiency power conversion in industrial and general-purpose applications. It features a wide input range from 4V to 40V and an adjustable switching frequency between 200kHz and 2.5MHz, allowing engineers to optimize for either component size or thermal efficiency. The device integrates a 90mohm high-side MOSFET and utilizes current mode control for simplified loop compensation.

Why Choose This Part

The wide switching frequency range and external clock synchronization help in managing EMI sensitive designs. Its high 5A current capability in a compact 8-PowerSOIC package, combined with internal compensation and a low 1uA shutdown current, simplifies board layout while maintaining high power density.

Applications

Industrial 24V Rail Regulation
Efficiently steps down standard 24V industrial bus voltages to 5V or 3.3V logic levels with up to 5A output current.
Distributed Power Systems
Used as an intermediate bus regulator in complex systems requiring localized high-current point-of-load conversion.
Battery Powered Equipment
Provides efficient regulation for multi-cell battery packs with low 40uA operating quiescent current to extend standby life.

Key Specifications

Function Step-Down
Topology Buck
Output Type Adjustable
Mounting Type Surface Mount
Package / Case 8-PowerSOIC (0.154", 3.90mm Width)
Current - Output 5A
Number of Outputs 1
Output Configuration Positive
Frequency - Switching 200kHz ~ 2.5MHz
Operating Temperature -40degC ~ 125degC (TJ)
Synchronous Rectifier No
Voltage - Input (Max) 40V
Voltage - Input (Min) 4V
Voltage - Output (Max) 28V
Supplier Device Package 8-SO PowerPad
Voltage - Output (Min/Fixed) 0.8V

Getting Started

Designers can use the TI WEBENCH Power Designer tool to generate schematics and BOMs based on specific input/output requirements. Ensure the thermal pad of the HSOIC-8 package is soldered to a large ground plane to manage heat dissipation at 5A loads. For prototyping, look for the LMR14050SEVM evaluation module to verify performance and transient response.

Also Consider

LMR16030SDDAR TITexas Instruments - Lower current 3A alternative if the 5A rating of the LMR14050 is not required for the application.
LT3976EMSE Analog Devices - Offers a higher input voltage rating up to 40V with lower quiescent current for ultra-low power standby requirements.