TPS61087 Datasheet, PDF (1/25 Pages) Texas Instruments – 650 kHz/1.2 MHz, 18.5 V STEP-UP DC-DC CONVERTER

TPS61087
Actual Size
3 mm x 3 mm
www.ti.com ............................................................................................................................................................... SLVS821A – MAY 2008 – REVISED JUNE 2008
650 kHz/1.2 MHz, 18.5 V STEP-UP DC-DC CONVERTER
FEATURES
1
• 2.5 V to 6.0 V Input Voltage Range
• 18.5 V Boost Converter With 3.2 A Switch
Current
• 650 kHz/1.2 MHz Selectable Switching
Frequency
• Adjustable Soft-Start
• Thermal Shutdown
• Undervoltage Lockout
• 10-Pin QFN Package
APPLICATIONS
• Handheld Devices
• GPS Receiver
• Digital Still Camera
• Portable Applications
• DSL Modem
• PCMCIA Card
• TFT LCD Bias Supply
DESCRIPTION
The TPS61087 is a high frequency, high efficiency DC to DC converter with an integrated 3.2 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
2.5 V to 6 V
Cin
2* 10 mF
16 V
Cby
1 mF
16 V
8
IN
3 _EN
SW ⁶
7
SW
9 _FREQ
4 _AGND
5 _PGND
2
FB
COMP ¹
SS ¹⁰
TPS61087
D
SL22
R1
200 kW
Css
100 nF
Rcomp
100 kW
Ccomp
820 pF
R2
18 kW
V_S
15 V/500 mA
Cout
4* 10 mF
25 V
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