MAX8822
Description
Features
- High-Efficiency Charge Pump for Up to Four White LEDs Independent Adaptive Voltage Supply for Each LED 24m A to 0.1m A Dimming Range 1% (typ) Current Accuracy and 0.3% Current Matching Low 65µA (typ) Quiescent Current
- Dual 200m A Low-Noise, High PSRR LDOs 16 Different Output Voltage binations Up to 3.3V High 60d B PSRR at 10k Hz
- Flexible Single-Wire Control for Dimming and LDO Output Voltage
- Low 0.5µA (typ) Shutdown Mode
- Soft-Start Limits Inrush Current
- Thermal Shutdown and Open- and Short-Circuit Protection
- Tiny 16-Pin, 3mm x 3mm Thin QFN Package (0.8mm max Height) with Exposed Paddle
The MAX8822 drives up to four white light-emitting diodes (LEDs) with regulated constant current for display backlighting in cell phones, digital cameras, PDAs, and other handheld devices. By utilizing a proprietary negative 0.5x inverting charge pump and innovative independent low-dropout (LDO) adaptive current regulators, very high efficiency is achieved over...
