TPS61170-Q1 Datasheet, PDF (1/28 Pages) Texas Instruments – 1.2A High Voltage Boost Converter in 2x2mm2 QFN Package

TPS61170-Q1
www.ti.com
SLVSAX2 – SEPTEMBER 2011
1.2A High Voltage Boost Converter in 2x2mm² QFN Package
Check for Samples: TPS61170-Q1
FEATURES
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• Qualified for Automotive Applications
• 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
APPLICATIONS
• 5-V to 12-V and 24-V, 12-V to 24-V Boost
Converter
• Buck Boost Regulation Using SEPIC Topology
DESCRIPTION
The TPS61170-Q1 is a monolithic, high-voltage
switching regulator with integrated 1.2-A, 40-V power
MOSFET. It 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 multi-cell
batteries or regulated 5-V, 12-V power rails.
The TPS61170-Q1 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 reference voltage to which the FB pin regulates
is 1.229V. 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-Q1 is available in a 6-pin 2 mm × 2
mm QFN package, allowing a compact power-supply
solution.
VIN 5 V
L1
10 mH
D1
VOUT 12 V/ 300 mA
C1
4.7 mF
R3
4.99 kW
C3
10 nF
TPS 61170
VIN
SW
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
Figure 1. Typical Application
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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 © 2011, Texas Instruments Incorporated