LM3150MH Datasheet, PDF (1/26 Pages) Texas Instruments – LM3150 SIMPLE SWITCHER CONTROLLER, 42V Synchronous Step-Down

LM3150
www.ti.com
SNVS561D – SEPTEMBER 2008 – REVISED MARCH 2011
LM3150 SIMPLE SWITCHER^® CONTROLLER, 42V Synchronous Step-Down
Check for Samples: LM3150
FEATURES
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•2 PowerWise^® Step-down Controller
• 6V to 42V Wide Input Voltage Range
• Adjustable Output Voltage Down to 0.6V
• Programmable Switching Frequency up to 1
MHz
• 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
TYPICAL APPLICATIONS
• Telecom
• Networking Equipment
• Routers
• Security Surveillance
• Power Modules
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.
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 Application
V_IN
R_ON
C_IN
C_SS
EN
VIN
RON _LM3150
SS
FB
SGND
PGND
VCC
V_IN
C_VCC
HG
M1
BST
SW
C_BST
ILIM
R_LIM
LG
M2
L
R_FB2
R_FB1
V_OUT
C_OUT
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2
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.
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