Cout

1

4

5

6

3

2

7

TPS61085

8

L

3.3 H

m

V

2.3Vto6V

IN

C

10 F

16V

IN

m

Cby

1 F

16V

m

IN

EN

FREQ

GND

SW

FB

COMP

SS

Css

100nF

Rcomp

51kW

Ccomp

1.6nF

R1

156kW

R2

18kW

2*10 F

25V

m

V

12V/300mA

S

D

PMEG2010AEH

TPS61085T-Q1

www.ti.com

SLVSAI9 – SEPTEMBER 2010

650-kHz/1.2-MHz 18.5-V STEP-UP DC-DC CONVERTER

Check for Samples: TPS61085T-Q1

1

FEATURES

APPLICATIONS

•

Handheld Devices

•

2.3-V to 6-V Input Voltage Range

•

GPS Receiver

•

18.5-V Boost Converter With 2.0-A Switch

•

Digital Still Camera

Current

•

Portable Applications

•

650-kHz/1.2-MHz Selectable Switching

•

DSL Modem

Frequency

•

PCMCIA Card

•

Adjustable Soft-Start

•

TFT LCD Bias Supply

•

Thermal Shutdown

•

Undervoltage Lockout

•

8-Pin MSOP Package

DESCRIPTION

The TPS61085 is a high-frequency high-efficiency dc-to-dc converter with an integrated 2.0-A 0.13-

Ω power

switch capable of providing an output voltage up to 18.5 V. The selectable frequency of 650 kHz and 1.2 MHz

allows the use of small external inductors and capacitors and provides fast transient response. The external

compensation allows optimizing the application for specific conditions. A capacitor connected to the soft-start pin

minimizes inrush current at startup.

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 © 2010, 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.