TPS61085T_15 Datasheet, PDF (1/26 Pages) Texas Instruments – 650-kHz/1.2-MHz 18.5-V STEP-UP DC-DC CONVERTER

TPS61085T
www.ti.com
SLVSA41A – NOVEMBER 2009 – REVISED DECEMBER 2009
650-kHz/1.2-MHz 18.5-V STEP-UP DC-DC CONVERTER
Check for Samples: TPS61085T
FEATURES
1
• 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
APPLICATIONS
• 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 mH
V_IN
2.3 V to 6 V
C_IN
10 mF
16 V
Cby
1 mF
16 V
6
IN
3
EN
5
SW
2
FB
7
FREQ
1
COMP
4
GND
8
SS
TPS61085
D
PMEG2010AEH
R1
156 kW
R2
18 kW
V_S
12 V/300 mA
Cout
2* 10 mF
25 V
Rcomp
51 kW
Css
100 nF
Ccomp
1.6 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 © 2009, Texas Instruments Incorporated