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FEATURES

DESCRIPTION

APPLICATIONS

Vin

Vo1

Vo3

Vcom

Vo2

Vo4

3.3 V

Boost

Converter

Positive Charge

Pump

Negative

Charge Pump

Vcom Buffer

Linear Regulator

Controller

TPS65100/05

Up to 15 V / 400 mA

Up to 30 V / 20 mA

Up to −12 V / 20 mA

2.7 V to 5.8 V

TPS65100

TPS65105

SLVS496B – SEPTEMBER 2003 – REVISED MARCH 2004

TRIPLE OUTPUT LCD SUPPLY WITH LINEAR REGULATOR AND VCOM BUFFER

•

2.7-V to 5.8-V Input Voltage Range

The TPS65100/05 offers a compact and small power

supply solution that provides all three voltages

•

1.6-MHz Fixed Switching Frequency

required by thin film transistor (TFT) LCD displays.

•

3 Independent Adjustable Outputs

The auxiliary linear regulator controller can be used

•

Main Output of up to 15 V With < 1% Output

to generate a 3.3-V logic power rail for systems

Voltage Accuracy

powered by a 5-V supply rail only.

•

Negative Output Voltage Down to -12 V/20 mA

The main output, Vo1, is a 1.6-MHz, fixed-frequency

•

Positive Output Voltage up to 30 V/20 mA

PWM boost converter providing the source drive

voltage for the LCD display. The device is available in

•

Integrated VCOM Buffer

two versions with different internal switch current

•

Auxiliary 3.3-V Linear Regulator Controller

limits to allow the use of a smaller external inductor

•

Internal Soft Start

when lower output power is required. The TPS65100

has a typical switch current limit of 2.3 A, and the

•

Internal Power-On Sequencing

TPS65105 has a typical switch current limit of 1.37 A.

•

Fault Detection of all Outputs

A

fully

integrated

adjustable

charge

pump

•

Thermal Shutdown

doubler/tripler provides the positive LCD gate drive

voltage. An externally adjustable negative charge

•

Available in TSSOP-24 and QFN-24

pump provides the negative gate drive voltage. Due

PowerPAD™ Packages

to the high 1.6-MHz switching frequency of the

charge pumps, inexpensive and small 220-nF capaci-

tors can be used.

•

TFT LCD Displays for Notebooks

The TPS65100/05 has an integrated VCOM buffer to

•

TFT LCD Displays for Monitors

power the LCD backplane. For LCD panels powered

•

Portable DVD Players

by 5 V only, the TPS65100/05 has a linear regulator

•

Tablet PCs

controller using an external transistor to provide a

•

Car Navigation Systems

regulated 3.3-V output for the digital circuits. For

maximum safety, the entire device goes into shut-

•

Industrial Displays

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.

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.

Copyright © 2003–2004, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.