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TPS65140PWP Datasheet(PDF) 1 Page - Texas Instruments

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No. de pieza TPS65140PWP
Descripción Electrónicos  TRIPLE OUTPUT LCD SUPPLY WITH LINEAR REGULATOR AND POWER GOOD
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI - Texas Instruments

TPS65140PWP Datasheet(HTML) 1 Page - Texas Instruments

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FEATURES
DESCRIPTION
APPLICATIONS
Vin
Vo1
Vo3
Power Good
Vo2
Vo4
3.3 V
Boost
Converter
Positive Charge
Pump
Negative
Charge Pump
Power Good
Linear Regulator
Controller
TPS65140/45
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
TPS65140
TPS65145
SLVS497B – SEPTEMBER 2003 – REVISED MARCH 2004
TRIPLE OUTPUT LCD SUPPLY WITH LINEAR REGULATOR AND POWER GOOD
2.7-V to 5.8-V Input Voltage Range
The TPS65140/145 offers a compact and small
power supply solution to provide 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 up to 15 V With <1% Typical
to generate a 3.3-V logic power rail for systems
Output 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
Auxiliary 3.3-V Linear Regulator Controller
two versions with different internal switch current
Internal Soft Start
limits to allow the use of a smaller external inductor
Internal Power-On Sequencing
when lower output power is required. The TPS65140
has a typical switch current limit of 2.3 A and the
Fault Detection of all Outputs
TPS65145 has a typical switch current limit of 1.37 A.
Thermal Shutdown
A
fully
integrated
adjustable
charge
pump
System Power Good
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
Additionally, the TPS65140/145 has a system power
TFT LCD Displays for Monitors
good output to indicate when all supply rails are
Portable DVD Players
acceptable. For LCD panels powered by 5 V, only the
Tablet PCs
TPS65140/145 has a linear regulator controller using
Car Navigation Systems
an external transistor to provide a regulated 3.3 V
output for the digital circuits. For maximum safety, the
Industrial Displays
entire device goes into shutdown 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.


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