DGK
PW
www.ti.com
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SLVS859 – JUNE 2008
650 kHz/1.2 MHz, 18.5 V STEP-UP DC-DC CONVERTER
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FEATURES
2.3 V to 6 V Input Voltage Range
18.5 V Boost Converter With 2.0 A Switch
Current
650 kHz/1.2 MHz Selectable Switching
Frequency
Adjustable Soft-Start
Thermal Shutdown
Undervoltage Lockout
8-Pin MSOP Package
8-Pin TSSOP Package
APPLICATIONS
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Handheld Devices
GPS Receiver
Digital Still Camera
Portable Applications
DSL Modem
PCMCIA Card
TFT LCD Bias Supply
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.
L
3.3
m
H
V
IN
2.3 V to 6 V
Cby
1
m
F
16 V
6
IN
3
SW
5
D
PMEG2010AEH
R1
156 kW
R2
18 kW
V
S
12 V/300 mA
C
IN
10
m
F
16 V
EN
2
FB
1
Cout
2* 10
m
F
25 V
7
FREQ
4
GND
TPS61085
SS
COMP
8
Rcomp
51 kW
Ccomp
1.6 nF
Css
100 nF
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.
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, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
