LM43603 Datasheet – Step-Down Voltage Converter – TI

Part Number: LM43603

Function: Synchronous Step-Down Voltage Converter

Package: HTSSOP, VSON 16 Pin Type

Manufacturer: Texas Instruments


LM43603 datasheet



The LM43603 SIMPLE SWITCHER regulator is an easy to use synchronous step-down DC-DC converter

capable of driving up to 3 A of load current from an input voltage ranging from 3.5 V to 36 V (42V abs max). The LM43603 provides exceptional efficiency, output accuracy and dropout voltage in a very small solution size.

An extended family is available in 0.5 A ,1 A and 2 A load current options in pin to pin compatible packages. Peak current mode control is employed to achieve simple control loop compensation and cycle-by-cycle current limiting. Optional features such as programmable switching frequency, synchronization, power-good flag, precision enable, internal soft-start, extendable soft start, and tracking provide a flexible and easy to use platform for a wide range of applications.

Block Diagram :

LM43603 Datasheet Diagram


1. High Efficiency at Light Load (DCM and PFM)

2. Meets EN55022/CISPR 22 EMI standards

3. Integrated Synchronous Rectification

4. Adjustable Frequency Range: 200 kHz to 2.2 MHz (500 kHz default)

5. Frequency Synchronization to External Clo



1. Industrial Power Supplies

2. Telecommunications Systems

3. Sub-AM Band Automotive

4. General Purpose Wide VIN Regulation

5. High Efficiency Point-Of-Load Regulation

LM43603 Datasheet PDF Download

LM43603 pdf

Other data sheets are available within the file: LM43603PWP, LM43603DSU