TPS65145PWPR TI Chips TPS6514x Triple Output LCD Supply 2.7V-5.8V Input Linear Regulator

TI Chips TPS65145PWPR TPS6514x Triple Output LCD Supply With Linear Regulator and Power Good

Features
• 2.7-V to 5.8-V Input Voltage Range
• 1.6-MHz Fixed Switching Frequency
• 3Independent Adjustable Outputs
• Main Output up to 15 V With <1% Typical Output
Voltage Accuracy
• Virtual Synchronous Converter Technology
• Negative Regulated Charge Pump Driver VO2
• Positive Charge Pump Converter VO3
• Auxiliary 3.3-V Linear Regulator Controller
• Internal Soft Start
• Internal Power-On Sequencing
• Fault Detection of All Outputs (TPS65140 and
TPS65145)
• NoFault Detection (TPS65141)
• Thermal Shutdown
• System Power Good
• Available in 24-Pin HTSSOP and 24-Pin VQFN
PowerPAD™ Packages

Applications
• TFTLCDDisplays for Notebooks
• TFTLCDDisplays for Monitors
• Portable DVD Players
• Tablet PCs
• CarNavigation Systems
• Industrial Displays

Description
The TPS6514x series offers a compact and small
power supply solution to provide 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.
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 TPS65140
and TPS65141 has a typical switch current limit of
2.3 A and the TPS65145 has a typical switch current
limit of 1.37 A. A fully integrated adjustable charge
pump doubler or 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
capacitors can be used.
Additionally, the TPS6514x series has a system
power good output to indicate when all supply rails
are acceptable. For LCD panels powered by 5 V the
device 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
TPS65140 and TPS65145 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. The TPS65141 does not
enter shutdown when one of its outputs is below its
power good threshold.