TPS65100
TPS65105
www.ti.com
SLVS496B–SEPTEMBER 2003–REVISED MARCH 2004
TRIPLE OUTPUT LCD SUPPLY WITH LINEAR REGULATOR AND VCOM BUFFER
FEATURES
DESCRIPTION
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2.7-V to 5.8-V Input Voltage Range
1.6-MHz Fixed Switching Frequency
3 Independent Adjustable Outputs
The TPS65100/05 offers a compact and small power
supply solution that provides all three voltages
required by thin film transistor (TFT) LCD displays.
The auxiliary linear regulator controller can be used
to generate a 3.3-V logic power rail for systems
powered by a 5-V supply rail only.
Main Output of up to 15 V With < 1% Output
Voltage Accuracy
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Negative Output Voltage Down to -12 V/20 mA
Positive Output Voltage up to 30 V/20 mA
Integrated VCOM Buffer
The main output, Vo1, is a 1.6-MHz, fixed-frequency
PWM boost converter providing the source drive
voltage for the LCD display. The device is available in
two versions with different internal switch current
limits to allow the use of a smaller external inductor
when lower output power is required. The TPS65100
has a typical switch current limit of 2.3 A, and the
TPS65105 has a typical switch current limit of 1.37 A.
Auxiliary 3.3-V Linear Regulator Controller
Internal Soft Start
Internal Power-On Sequencing
Fault Detection of all Outputs
Thermal Shutdown
A
fully integrated adjustable charge pump
doubler/tripler provides the positive LCD gate drive
voltage. An externally adjustable negative charge
pump provides the negative gate drive voltage. Due
to the high 1.6-MHz switching frequency of the
charge pumps, inexpensive and small 220-nF capaci-
tors can be used.
Available in TSSOP-24 and QFN-24
PowerPAD™ Packages
APPLICATIONS
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TFT LCD Displays for Notebooks
TFT LCD Displays for Monitors
Portable DVD Players
Tablet PCs
Car Navigation Systems
Industrial Displays
The TPS65100/05 has an integrated VCOM buffer to
power the LCD backplane. For LCD panels powered
by 5 V only, the TPS65100/05 has a linear regulator
controller using an external transistor to provide a
regulated 3.3-V output for the digital circuits. For
maximum safety, the entire device goes into shut-
down as soon as one of the outputs is out of
regulation. The device can be enabled again by
toggling the input or the enable (EN) pin to GND.
TPS65100/05
Vo1
Vin
Boost
Up to 15 V / 400 mA
2.7 V to 5.8 V
Converter
Vo3
Positive Charge
Pump
Up to 30 V / 20 mA
Negative
Charge Pump
Vo2
Up to −12 V / 20 mA
Vcom
Vcom Buffer
Vo4
3.3 V
Linear Regulator
Controller
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 © 2003–2004, Texas Instruments Incorporated