TPS61081DRCTG4 Datasheet, PDF (1/27 Pages) Texas Instruments – HIGH VOLTAGE DC/DC BOOST CONVERTER WITH 0.5-A/1.3-A INTEGRATED SWITCH

TPS61080
TPS61081
www.ti.com
SLVS644D – FEBRUARY 2006 – REVISED APRIL 2013
HIGH VOLTAGE DC/DC BOOST CONVERTER WITH 0.5-A/1.3-A INTEGRATED SWITCH
Check for Samples: TPS61080, TPS61081
FEATURES
1
•2 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
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.
T_A
–40°C
to 85°C
ORDERING INFORMATION
OVERCURRENT
LIMIT
PACKAGE
PACKAGE
MARKING
0.5A(min)
TPS61080DRCR
BCN
1.3A(min)
TPS61081DRCR
BCO
0.5A(min)
TPS61080DRCT
BCN
1.3A(min)
TPS61081DRCT
BCO
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
TOP VIEW
L
VIN
SS
GND
FB
Thermal
Pad
SW
OUT
PGND
FSW
EN
10-PIN 3mm x 3mm x 1mm QFN
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.
PowerPAD is a trademark of Texas Instruments.
2
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 © 2006–2013, Texas Instruments Incorporated