PDF RT9921 Download

Description

The RT9921 includes a high-performance boost regulator, a low dropout linear regulator (LDO), a gate pulse modulator (GPM), a voltage detector, a VCOM buffer (unity gain OPA), and a VGH charge pump controller for active matrix thin-film transistor (TFT) liquid-crystal displays (LCDs).

Features

1. 2.5V to 5.5V Input Supply Voltage

2. 640kHz/1.2MHz Current-Mode Boost Regulator

3. Fast Transient Response to Pulsed Load

4. Adjustable Output Voltage (±1%)

5. Built-In 16V, 2A, 0.2Ω N-MOSFET

6. High Efficiency Up to 90%

7. Programmable Soft-Start

8. Over-Current Protection

9. Output Under-Voltage Protection