Datasheet
AS1376
1A, Low Input Voltage, Low Quiescent Current LDO
1 General Description
2 Key Features
Ultra-Low Dropout Voltage: <120mV @ 1A load
The AS1376 is a Dual Supply Rail Linear Regulator designed to
deliver 1A of load current while consuming only 67µA (typ) of ground
current. In the typical post regulation application VBIAS is directly
connected to the main input supply, (range 2.5V...5.5V) and VIN is
supplied by the output voltage of a host DC-DC Converter (range
0.7V...4.5V).
Output voltages: 0.5V to 2.2V
Input voltage: 0.7V to 3.6V
Bias Supply Voltage: 2.5V to 5.5V
Maximum Output Current: 1A
The device offers excellent dropout (120mV @ 1A) and transient
performance.
Output Voltage Accuracy: ±2%
Low Shutdown Current: 20nA
In shutdown (Enable pin pulled low), the device turns off and reduces
quiescent current consumption to 10nA (typ) at both VBIAS and VIN
terminals.
Wide band VBIAS PSRR 45dB (typ) 10mA load
Integrated Overtemperature / Overcurrent Protection
Chip Enable Input
In shutdown, a 100 (typ) discharge path is connected between
output and ground to provide rapid discharge of the overall load
capacitance connected to the AS1376 output terminal. Auto-
discharge minimizes the possibility that VOUT > VIN during
shutdown. When VOUT > VIN, reverse current flows through the
inherent body diode of the N-channel series pass transistor.
Minimal external components required
Operating Temperature Range: -40°C to +85°C
8-pin 2x2mm TDFN Package
2 weeks availability for non-standard devices between 0.5V and
1.1V in 50mV steps and between 1.1V and 2.2V in 100mV
steps.
The AS1376 also features internal protection against over-
temperature, over-current and under-voltage conditions.
The device is available in an 8-pin 2x2 TDFN package and is
qualified for operation over the -40ºC to +85ºC temperature range.
3 Applications
The devices are ideal for powering cordless and mobile phones,
MP3 players, CD and DVD players, PDAs, hand-held computers,
digital cameras and any other hand-held and/or battery-powered
device.
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). See Ordering Information
on page 18.
Figure 1. AS1376 - Typical Application Diagram
www.austriamicrosystems.com/LODs/AS1376
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