Document
Global Mixed-mode Technology Inc.
G5520
Bias Power Supply for TFT LCD Panels
Features
2.5V to 5.5V Input Supply Range 1.2MHz Current-Mode Boost Regulator
Fast Transient Response to Pulse Load ±1% Accurate Output Voltage Built-In 20V/1.8A, 0.7Ω N-Channel MOSFET High Efficiency up to 90% Over-Current Protection Output Under-Voltage Protection High-Performance Operational Amplifier ±150mA Output Short-Circuit Current 12V/μs Slew Rate 12MHz, -3dB Bandwidth Rail-to-Rail Input and Output 600kHz Negative Charge Pump Driver for VGL 600kHz Positive Charge Pump Driver for VGH Power-On Sequence Control Thermal-Overload Protection TQFN3X3-16 Package
Applications
Photo Frame GPS UMPC
General Description
The G5520 includes a high-performance boost regulator, a VCOM buffer (unity gain OPA), a VGH charge pump driver, and a VGL charge pump driver for active-matrix thin-film transistor (TFT) liquid-crystal displays (LCDs).
The boost c.