AS1372 ultra low input LDO

Description

The AS1372 is a Dual Supply Rail Linear Regulator designed for providing ultra-low voltages.

In a typical application the battery is directly connected to VBIAS and VIN is connected to the output of a DC-DC Converter.

The very low quiescent currents together with the excellent transient features and the superior dropout are making the AS1372 an ideal device for applications running on batteries.

The robust design ensures that no under-voltage failure can occur and the device is also equipped with an internal protection against over-temperature and over-current.

The device is available in fixed output voltages from 0.5V up to 2.2V in 100mV steps (50mV from 0.5V to 1.1V).

The AS1372 is available in a 5-bumps CS-WLP package and is qualified for -40°C to +85°C operation.

Key Features

• Input Voltage: 0.7V to 4.5V
• Bias Supply Voltage: 2.5V to 5.5V
• Output Voltage: 0.5V to 2.2V in 100mV steps
• Output Voltage Accuracy: ±1.5%
• Dropout Voltage 135mV @ 350mA load
• Max. Output Current: 350mA
• Load Transient Response: ±15mV (typ.)
• Superior Efficiency
• Low Shutdown Current: 10nA
• High PSRR: >80dB @ 10Hz-1kHz, 60db @100kHz
• Noise Voltage: 50μVRMS from 10Hz to 1000kHz
• Integrated Overtemperature/Overcurrent Protection
• Chip Enable Input
• Operating Temperature Range: -40°C to +85°C
• 5-bumps CS-WLP Package

Applications

The devices are ideal for powering cordless and mobile phones, MP3 players, PDAs, hand-held computers, digital cameras, and any other hand-held and/or battery-powered device.

Block diagram for AS1372 ultra low input LDO