1

FEATURES

DESCRIPTION

APPLICATIONS

VIN5V

L1

10 H

m

D1

VIN

SW

FB

GND

CTRL

COMP

C2

4.7 F

m

C3

680 pF

TPS 61170

R1

87.6kW

VOUT 12V/300mA

R2

10kW

R3

10kW

C1

4.7 F

m

L1: TOKO#A915_Y-100M

C1:MurataGRM188R61A475K

C2:MurataGRM21BR61E475K

*R3,C3:CompensationRCnetwork

TPS61170

SLVS789A – NOVEMBER 2007 – REVISED FEBRUARY 2008

www.ti.com

• 3-V to 18-V Input Voltage Range

• High Output Voltage: Up to 38 V

The TPS61170 is a monolithic high voltage switching

regulator with integrated 1.2-A, 40-V power MOSFET.

• 1.2-A integrated Switch

It

can

be

configured

in

several

standard

• 1.2-MHz Fixed Switching Frequency

switching-regulator topologies, including boost and

• 12 V at 300 mA and 24 V at 150 mA from 5-V

SEPIC. The device has a wide input-voltage range to

Input (Typical)

support applications with input voltage from multi-cell

batteries or regulated 5-V, 12-V power rails.

• Up to 93% Efficiency

The TPS61170 uses a 1.2-MHz switching frequency,

• On-The-Fly Output Voltage Reprogramming

allowing the use low-profile inductors and low-value

• Skip-Switching Cycle for Output Regulation at

ceramic input and output capacitors. The external

Light Load

loop

compensation

gives

the

user

flexibility

to

• Built-in Soft Start

optimize loop compensation and transient response.

The device has built-in protection features, such as

• 6-Pin, 2 mm × 2 mm QFN Package

pulse-by-pulse overcurrent limit, soft start and thermal

shutdown.

• 5-V to 12-V and 24-V, 12-V to 24-V Boost

The feedback reference voltage of the FB pin is

Converter

1.229V. It can be lowered using a 1-wire digital

interface (Easyscale™ protocol) through the CTRL

• Buck Boost Regulation Using SEPIC Topology

pin. Alternatively, a pulse width-modulation (PWM)

• ADSL Modems

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.

Figure 1. Typical Application

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.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007–2008, 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.