1 Features

1• PowerWise™ Step-Down Controller

• 6-V to 42-V Wide Input Voltage Range

• Adjustable Output Voltage Down to 0.6 V

• Programmable Switching Frequency up to 1 MHz

• No Loop Compensation Required

• Fully WEBENCH® Enabled

• Low External Component Count

• Constant On-Time (COT) Control

• Ultra-Fast Transient Response

• Stable With Low ESR Capacitors

• Output Voltage PreBias Startup

• Valley Current Limit

• Programmable Soft-Start

• Create a Custom Design Using the LM3150 with

the WEBENCH Power Designer

2 Applications

• Telecom

• Networking Equipment

• Routers

• Security Surveillance

• Power Modules

3 Description

The LM3150 SIMPLE SWITCHER® controller is an

easy-to-use and simplified step-down power

controller capable of providing up to 12 A of output

current in a typical application. Operating with an

input voltage range of 6 V to 42 V, the LM3150

controller features an adjustable output voltage down

to 0.6 V. The switching frequency is adjustable up to

1 MHz and the synchronous architecture provides for

highly efficient designs. The LM3150 controller

employs a constant on-time (COT) architecture with a

proprietary emulated ripple mode (ERM) control that

allows for the use of low ESR output capacitors,

which reduces overall solution size and output

voltage ripple. The COT regulation architecture allows

for fast transient response and requires no loop

compensation, which reduces external component

count and reduces design complexity.

Fault protection features such as thermal shutdown,

undervoltage lockout, overvoltage protection, shortcircuit

protection, current limit, and output voltage

prebias start-up allow for a reliable and robust

solution.

The LM3150 concept provides for an easy-to-use

complete design using a minimum number of external

components and TI’s WEBENCH online design tool.

WEBENCH provides design support for every step of

the design process and includes features such as

external component calculation with a new MOSFET

selector, electrical simulation, thermal simulation, and

Build-It boards for prototyping.