General Description

The AS1351 is a high-performance dual CMOS lowdropout voltage regulator in a single 3x3mm package. The efficient set of programmable power supplies is optimized to deliver the best compromise between quiescent current and regulator performance for mobile phones, PDAs, MP3 players, and other battery powered devices.

Key Features

■ 2 Independent Voltage Regulators with Shutdown

■ Output Current: 200mA each LDO

■ One Time Programmable Output Voltage (User- or Factory-Trimmed)

■ Programmable Output Voltage Range: 1.8 to 3.3V in 0.1V Steps

■ Accuracy: ±1.5

■ PSRR: 70dB at 1kHz, 40dB at 100kHz

■ Line Regulation: ±2mV

■ Load Regulation: ±0.6mV

■ Supply Range: 3 to 5.5V

■ 0.2V Dropout Voltage @ I = 200mA

■ Shutdown Current: ≤1µA

■ Supply Current Without Load: 125µA (typ)

■ Softstart for Low Inrush Current

■ Stable with low ESR Ceramic Capacitors from 1 to 4.7µF

■ Low Noise: 40µV rms @10Hz to 100kHz Bandwidth

■ Thermal Protection

■ Over-Current Protection

■ Temperature Range: -40 to +85°C

■ 12-pin QFN 3x3mm Package

Applications

The AS1351 is ideal for cordless and mobile phones, MP3 players, CD and DVD players, PDAs, handheld computers, digital cameras, and any other hand-held battery-powered device.