The TPS65100 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.

The main output, VO1, is a 1.6-MHz fixed-frequency PWM boost converter providing the source-drive voltage for the LCD display. The TPS65100 has a typical switch current limit of 2.3 A. 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 capacitors can be used.

The TPS65100 has an integrated VCOM buffer to power the LCD backplane. For LCD panels powered by 5 V only, the TPS65100 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 TPS65100 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.

• Qualified for Automotive Applications
• 2.7-V to 5.8-V Input Voltage Range
• 1.6-MHz Fixed Switching Frequency
• Three Independently Adjustable Outputs
• Main Output of up to 15 V With < 1% Output Voltage Accuracy
• Virtual Synchronous Converter Technology
• Negative Regulated Charge Pump Driver VO2
• Positive Charge Pump Converter VO3
• Integrated VCOM Buffer
• Auxiliary 3.3-V Linear Regulator Controller
• Internal Soft Start
• Internal Power-On Sequencing
• Fault Detection of all Outputs
• Thermal Shutdown
• Available in TSSOP-24 PowerPAD Package