AS13985 Low-Dropout IC

Description

The AS13985 is a high-performance low-dropout 150mA voltage regulator designed for use with very-low ESR output capacitors. The device can deliver superior performance in all specifications critical to battery-powered designs, and is perfectly suited for mobile phones, PDAs, MP3 players, and other battery powered devices.

Stability is guaranteed with a ceramic output capacitor of 1 to 22μF. The low equivalent series resistance (5Ω) of these capacitors ensures low output impedance at high frequencies. Automatic sleep mode requires less than 1μA quiescent current when pin EN is pulled low.

Regulation performance is excellent even under low dropout conditions, when the power transistor has to operate in linear mode. A 10nF bypass capacitor can be added to reduce output noise to 30μV. The low-noise performance allows direct connection of noise sensitive circuits without additional filtering networks.

Multiple output voltage options from 1.2V to 5.0V are available as standard products. Contact austriamicrosystems, AG for details.

The AS13985 is available in a 5-bump WLP package and a 5-pin SOT23 package.

Key Features

• 45mV Ultra-Low Dropout Voltage @ 150mA (0.3mV @ 1mA)
• 150mA Guaranteed Output Current
• 500mA High Peak-Current Capability
• 2.5V to 5.5V Supply Voltage Range
• 1.2V to 5.0V Output Voltage Range (in 25mV Steps)
• 1.0% Output Voltage Accuracy
• 95μA Low GND Pin Current
• Less than1μA Low Shutdown Current
• Stable with Low-ESR Output Capacitor
• Integrated Over-Temperature/Over-Current Protection
• Minimal External Components Required
• Operating Temperature Junction Range: -40°C to +125°C
• 5-bump WLP (wafer level package) and 5-pin SOT23 package

Applications

The AS13985 is ideal for powering cordless and mobile phones, MP3 players, CD and DVD players, PDAs, handheld computers, digital cameras, and any other hand-held battery-powered device.

Block diagram for AS13985 Low-Dropout IC