TPS61170_15 Datasheet, PDF (1/33 Pages) Texas Instruments – TPS61170 1.2-A High-Voltage Boost Converter in 2-mm x 2-mm2 QFN Package

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TPS61170
SLVS789D – NOVEMBER 2007 – REVISED DECEMBER 2014
TPS61170 1.2-A High-Voltage Boost Converter in 2-mm x 2-mm² QFN Package
1 Features
•1 3-V to 18-V Input Voltage Range
• High Output Voltage: Up to 38 V
• 1.2-A Integrated Switch
• 1.2-MHz Fixed Switching Frequency
• 12 V at 300 mA and 24 V at 150 mA From 5-V
Input (Typical)
• Up to 93% Efficiency
• On-The-Fly Output Voltage Reprogramming
• Skip-Switching Cycle for Output Regulation at
Light Load
• Built-in Soft Start
• 6-Pin, 2-mm × 2-mm QFN Package
2 Applications
• 5-V to 12-V and 24-V, 12-V to 24-V Boost
Converter
• Buck Boost Regulation Using SEPIC Topology
• ADSL Modems
3 Description
The TPS61170 is a monolithic, high-voltage switching
regulator with integrated 1.2-A, 40-V power MOSFET.
The device can be configured in several standard
switching-regulator topologies, including boost and
SEPIC. The device has a wide input-voltage range to
support applications with input voltage from multicell
batteries or regulated 5-V, 12-V power rails.
The TPS61170 operates at a 1.2-MHz switching
frequency, allowing the use of low-profile inductors
and low-value ceramic input and output capacitors.
External loop compensation components give the
user flexibility to optimize loop compensation and
transient response. The device has built-in protection
features, such as pulse-by-pulse overcurrent limit,
soft start, and thermal shutdown.
The FB pin regulates to a reference voltage of 1.229
V. The reference voltage can be lowered using a 1-
wire digital interface (Easyscale™ protocol) through
the CTRL pin. Alternatively, a pulse width-modulation
(PWM) signal can be applied to the CTRL pin. The
duty cycle of the signal reduces the feedback
reference voltage proportionally.
The TPS61170 is available in a 6-pin 2-mm × 2-mm
QFN package, allowing a compact power-supply
solution.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61170
VSON (6)
2.00 mm x 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Typical Application Schematic
VIN 5 V
L1
10 mH
D1
VOUT 12 V/ 300 mA
C1
4.7 mF
TPS 61170
VIN
SW
R3
4.99 kW
C3
10 nF
CTRL
FB
COMP GND
R1
87.6 kW
C2
4.7 mF
R2
10 kW
L1: TOKO#A915_Y-100M
C1: Murata GRM188R61A475K
C2: Murata GRM21BR61E475K
D1: ONsemi MBR0540T1
*R3, C3: Compensation RC network
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.