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.