TPS61175_11 Datasheet, PDF (1/24 Pages) Texas Instruments – 3-A High Voltage Boost Converter with Soft-start and Programmable Switching Frequency

TPS61175
www.ti.com
SLVS892A – DECEMBER 2008 – REVISED OCTOBER 2010
3-A High Voltage Boost Converter with Soft-start and Programmable Switching Frequency
Check for Samples: TPS61175
FEATURES
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•2 2.9-V to 18-V Input Voltage Range
• 3A, 40V Internal Switch
• High Efficiency Power Conversion: Up to 93%
• Frequency Set by External Resistor: 200-kHz
to 2.2-MHz
• Synchronous External Switching Frequency
• User Defined Soft Start into Full Load
• Skip-Switching Cycle for Output Regulation at
Light Load
• 14-pin HTSSOP Package with PowerPad™
APPLICATIONS
• 5V to 12V, 24V power conversion
• Supports SEPIC, Flyback topology
• ADSL Modems
• TV Tuner
DESCRIPTION
The TPS61175 is a monolithic switching regulator
with integrated 3-A, 40-V power switch. It can be
configured in several standard switching-regulator
topologies, including boost, SEPIC and flyback. The
device has a wide input voltage range to support
application with input voltage from multi-cell batteries
or regulated 5-V, 12-V power rails.
The TPS61175 regulates the output voltage with
current mode PWM (pulse width modulation) control.
The switching frequency of PWM is either set by an
external resistor or an external clock signal. The user
can program the switching frequency from 200-kHz to
2.2-MHz.
The device features a programmable soft-start
function to limit inrush current during start-up, and
has built-in other protection features, such as
pulse-by-pulse over current limit and thermal
shutdown. The TPS61175 is available in 14-pin
HTSSOP package with Powerpad.
TYPICAL APPLICATION FOR BOOST CONVERTER
V_IN
L1
D1
V_OUT
C1
R4
C3 R3
C4
TPS61175
VIN
SW
EN
SW
FREQ FB
SS PGND
COMP PGND
Syn PGND
AGND NC
C2
R1
R2
Figure 1. Typical Application
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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.
PowerPad is a trademark of Texas Instruments.
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.
Copyright © 2008–2010, Texas Instruments Incorporated