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LM3150
SNVS561G – SEPTEMBER 2008 – REVISED SEPTEMBER 2015
LM3150 Wide-VIN Synchronous Buck Controller
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, short-
circuit 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.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM3150
HTSSOP (14)
5.00 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Typical Application Schematic
VIN
RON
CIN
CSS
EN
VIN
RON LM3150
SS
FB
SGND
PGND
VCC
VIN
CVCC
HG
M1
BST
SW
CBST
ILIM
RLIM
LG
M2
L
RFB2
RFB1
VOUT
COUT
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
