Description

The AS3681 is a highly-integrated, ultra-flexible CMOS Power- and Lighting Management Unit to supply power to LCD- and camera-modules in mobile telephones, and other 1-cell Li+ or 3-cell NIMH powered devices.

The AS3681 incorporates one low-power, low-dropout reg ulator (LDO), one step-up DC-DC Converter for white backlight LEDs, one high-power Charge Pump for camera flash LEDs, one Analog-to-Digital Converter, support for u to 11 current sinks, a serial interface, and control logic all onto a single die.

The linear analog regulator features extremely high analog performance regarding:

• Noise (< 30 µ Vrms from 100Hz to 100kHz)
• Line/load Regulation (<1mV Static and <20mV Transient)
• Power Supply Rejection (>70dB@1kHz)
• Ultra-Low Power Consumption (1µA Shutdown, 6µA Standby)

LDO output voltages and output currents are programma ble via a serial interface.