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LM3151 Datasheet(PDF) 1 Page - Texas Instruments

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Part # LM3151
Description  SIMPLE SWITCHER짰 CONTROLLER, High Input Voltage Synchronous Step-Down
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM3151 Datasheet(HTML) 1 Page - Texas Instruments

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LM3151, LM3152, LM3153
www.ti.com
SNVS562G – SEPTEMBER 2008 – REVISED MARCH 2011
LM3151/LM3152/LM3153 SIMPLE SWITCHER® CONTROLLER, High Input Voltage
Synchronous Step-Down
Check for Samples: LM3151, LM3152, LM3153
1
FEATURES
DESCRIPTION
The LM3151/2/3 SIMPLE SWITCHER Controller is an
234
PowerWise™ Step-down Controller
easy to use and simplified step down power controller
6V to 42V Wide Input Voltage Range
capable of providing up to 12A of output current in a
Fixed Output Voltage of 3.3V
typical application. Operating with an input voltage
range from 6V-42V, the LM3151/2/3 features a fixed
Fixed Switching Frequencies of 250 kHz/500
output voltage of 3.3V, and features switching
kHz/750 kHz
frequencies of 250 kHz, 500 kHz, and 750 kHz. The
No Loop Compensation Required
synchronous architecture provides for highly efficient
Fully WEBENCH® Enabled
designs.
The
LM3151/2/3
controller
employs
a
Constant
On-Time
(COT)
architecture
with
a
Low External Component Count
proprietary Emulated Ripple Mode (ERM) control that
Constant On-Time Control
allows for the use of low ESR output capacitors,
Ultra-Fast Transient Response
which reduces overall solution size and output
voltage
ripple.
The
Constant
On-Time
(COT)
Stable with Low ESR Capacitors
regulation
architecture
allows
for
fast
transient
Output Voltage Pre-bias Startup
response and requires no loop compensation, which
Valley Current Limit
reduces external component count and reduces
design complexity.
Programmable Soft-start
Fault protection features such as thermal shutdown,
TYPICAL APPLICATIONS
under-voltage lockout, over-voltage protection, short-
circuit protection, current limit, and output voltage pre-
Telecom
bias startup allow for a reliable and robust solution.
Networking Equipment
The
LM3151/2/3
SIMPLE
SWITCHER
concept
Routers
provides for an easy to use complete design using a
Security Surveillance
minimum number of external components and TI’s
Power Modules
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.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
PowerWise is a trademark of Texas Instruments.
3
SIMPLE SWITCHER, WEBENCH are registered trademarks of Texas Instruments.
4
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008–2011, Texas Instruments Incorporated
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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