AS1376 datasheet(2/20 Pages) AMSCO

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AS1376

1A, Low Input Voltage, Low Quiescent Current LDO

www.austriamicrosystems.com/LODs/AS1376

Revision 1.4

1 - 19

Datasheet

1 General Description

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).

The device offers excellent dropout (120mV @ 1A) and transient

performance.

In shutdown (Enable pin pulled low), the device turns off and reduces

quiescent current consumption to 10nA (typ) at both VBIAS and VIN

terminals.

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.

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.

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

2 Key Features



Ultra-Low Dropout Voltage: <120mV @ 1A load



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



Output Voltage Accuracy: ±2%



Low Shutdown Current: 20nA



Wide band VBIAS PSRR 45dB (typ) 10mA load



Integrated Overtemperature / Overcurrent Protection



Chip Enable Input



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.

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.

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