LM3150
www.ti.com
SNVS561D –SEPTEMBER 2008–REVISED MARCH 2011
®
LM3150 SIMPLE SWITCHER CONTROLLER, 42V Synchronous Step-Down
Check for Samples: LM3150
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FEATURES
DESCRIPTION
The LM3150 SIMPLE SWITCHER® Controller is an
easy to use and simplified step down power controller
capable of providing up to 12A of output current in a
typical application. Operating with an input voltage
range of 6V-42V, the LM3150 features an adjustable
output voltage down to 0.6V. 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 Constant On-Time
(COT) regulation architecture allows for fast transient
response and requires no loop compensation, which
reduces external component count and reduces
design complexity.
PowerWise® Step-down Controller
6V to 42V Wide Input Voltage Range
Adjustable Output Voltage Down to 0.6V
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Programmable Switching Frequency up to 1
MHz
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No Loop Compensation Required
Fully WEBENCH® Enabled
Low External Component Count
Constant On-Time Control
Ultra-fast Transient Response
Stable with Low ESR Capacitors
Output Voltage Pre-bias Startup
Valley Current Limit
Programmable Soft-start
Fault protection features such as thermal shutdown,
under-voltage lockout, over-voltage protection, short-
circuit protection, current limit, and output voltage pre-
bias startup allow for a reliable and robust solution.
The LM3150 SIMPLE SWITCHER® 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.
TYPICAL APPLICATIONS
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Telecom
Networking Equipment
Routers
Security Surveillance
Power Modules
Typical Application
V
IN
VCC
EN
C
VCC
VIN
V
IN
M1
HG
R
ON
C
IN
BST
RON
SS
C
LM3150
BST
L
SW
V
OUT
C
SS
C
OUT
ILIM
R
R
FB2
FB
R
LIM
SGND
M2
LG
FB1
PGND
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008–2011, Texas Instruments Incorporated