TPS61080 Datasheet, PDF (1/25 Pages) Texas Instruments – HIGH VOLTAGE DC/DC BOOST CONVERTER WITH 0.5-A/1.3-A INTEGRATED SWITCH

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TPS61080
TPS61081
SLVS644B – FEBRUARY 2006 – REVISED JANUARY 2007
HIGH VOLTAGE DC/DC BOOST CONVERTER WITH 0.5-A/1.3-A INTEGRATED SWITCH
FEATURES
• 2.5-V to 6-V Input Voltage Range
• Up to 27-V Output Voltage
• 0.5-A Integrated Switch (TPS61080)
1.3-A Integrated Switch (TPS61081)
• 12 V/400 mA and 24 V/170 mA From 5-V Input
(TYP)
• Integrated Power Diode
• 1.2-MHz/600-kHz Selectable Fixed Switching
Frequency
• Input to Output Isolation
• Short-Circuit Protection
• Programmable Soft Start
• Overvoltage Protection
• Up to 87% Efficiency
• 10-Pin 3 mm×3 mm QFN Package
APPLICATIONS
• 3.3V to 12V, 5V to 12V and 24V Boost
Converter
• White LED Backlight for Media Form Factor
Display
• OLED Power Supply
• xDSL Applications
• TFT-LCD Bias Supply
• White LED Flash Light
TYPICAL APPLICATION
TPS61081
Vin 5V
L1 4.7 µH
VIN L SW
C1
4.7 mF
Cs
47 nF
EN
FSW
SS
GND
OUT
FB
PGND
R3
100 Ω
V_O 12 V/250 mA
R1
C3
437 kW ^{33 pF}
R2
49.9 kW
4.7 µF
L1: TDK VLCF5020T-4R7N1R7-1
C1: Murata GRM188R60J105K
C2: Murata GRM219R61C475K
C3: Feed forward capacitor for stability
R3: Noise decoupling resistor
Cs: Soft start programming capacitor
Figure 1. 5V to 12V, 250mA Step-Up DC/DC
Converter
DESCRIPTION
The TPS61080/1 is a 1.2MHz/600kHz fixed
frequency boost regulator designed for high
integration, which integrates a power switch, an
input/output isolation switch and a power diode.
When a short circuit condition is detected, the
isolation switch opens up to disconnect the output
from the input. As a result, the IC protects itself and
the input source from any pin, except VIN, from
being shorted to ground. The isolation switch also
disconnects the output from input during shutdown to
prevent any leakage current. Other provisions for
protection include 0.5A/1.3A peak-to-peak over
current protection, programmable soft start (SS),
over voltage protection (OVP), thermal shutdown and
under voltage lockout (UVLO).
The IC operates from input supplies including single
Li-ion battery, triple NiMH, and regulated 5V, such as
USB output. The output can be boosted up to 27V.
TPS61080/1 can provide the supply voltages of
OLED, TFT-LCD bias, 12V and 24V power rails. The
output of TPS61080/1 can also be configured as a
current source to power up to 7 WLED in flash light
applications.
ORDERING INFORMATION
T_A
–40°C
to 85°C
OVERCURRENT
LIMIT
0.5A(min)
1.3A(min)
0.5A(min)
1.3A(min)
PACKAGE
TPS61080DRCR
TPS61081DRCR
TPS61080DRCT
TPS61081DRCT
PACKAGE
MARKING
BCN
BCO
BCN
BCO
TOP VIEW
L
VIN
SS
GND
FB
Thermal
Pad
SW
OUT
PGND
FSW
EN
10-PIN 3mm x 3mm x 1mm QFN
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.
PowerPAD is a trademark of Texas Instruments.
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 © 2006–2007, Texas Instruments Incorporated