LM2657MTC - Texas Instruments

Manufacturer Part Number

LM2657MTC

Manufacturer

Texas Instruments

Introduction

The LM2657MTC from Texas Instruments is a power management integrated circuit specifically designed for DC DC switching control applications.

Product Features and Performance

Dual output step-down (buck) controller

Integrated synchronous rectifier for efficiency

Programmable switching frequency from 200kHz to 500kHz

Supports a maximum duty cycle of 70%

Soft start for controlled start-up

Current limit for overcurrent protection

Power Good indicator for system monitoring

Operational over a wide supply voltage range of 4.5V to 28V

Thermal operating range from -40°C to 125°C

Product Advantages

High efficiency due to synchronous rectification

Flexible frequency control allows optimization for various applications

Simultaneous power regulation of two outputs enhances power system design

Robust protection features for reliable operation

Dual-phase operation can help reduce input and output capacitance requirements

Key Technical Parameters

Topology: Buck

Number of Outputs: 2

Output Phases: 2

Voltage - Supply (Vcc/Vdd): 4.5V to 28V

Frequency - Switching: 200kHz to 500kHz

Duty Cycle (Max): 70%

Quality and Safety Features

Current limit protection

Thermal shutdown

Power Good output for system monitoring

Soft start function to prevent inrush current

Compatibility

Compatible with a variety of capacitors and inductors for flexible circuit design

Capable of driving N-channel MOSFETs

Application Areas

Switching power supplies

Distributed power systems

Telecommunications infrastructure

Networking and data communications

Industrial control systems

Product Lifecycle

Obsoleted product

Potential replacement or upgrade options should be sought for new designs

Several Key Reasons to Choose This Product

Highly integrated solution reduces component count and design complexity

Synchronous rectification for improved efficiency reduces heat generation

Dual outputs provide convenient power regulation for multiple rails

Programmable frequency offers design flexibility and optimization

Operates over a wide input voltage range to accommodate various power sources

Comprehensive protection features ensure long term reliability