austriamicrosystems AG is now ams AG The technical content of this austriamicrosystems datasheet is still valid. Contact information: Headquarters: ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 e-Mail: ams sales ams.com Please visit our website at www.ams.com 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 67A (typ) of ground Output voltages: 0.5V to 2.2V current. In the typical post regulation application VBIAS is directly Input voltage: 0.7V to 3.6V 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 Bias Supply Voltage: 2.5V to 5.5V 0.7V...4.5V). Maximum Output Current: 1A The device offers excellent dropout (120mV 1A) and transient Output Voltage Accuracy: 2% performance. 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 Wide band VBIAS PSRR 45dB (typ) 10mA load terminals. Integrated Overtemperature / Overcurrent Protection In shutdown, a 100 (typ) discharge path is connected between Chip Enable Input output and ground to provide rapid discharge of the overall load capacitance connected to the AS1376 output terminal. Auto- Minimal external components required discharge minimizes the possibility that VOUT > VIN during Operating Temperature Range: -40C to +85C shutdown. When VOUT > VIN, reverse current flows through the 8-pin 2x2mm TDFN Package inherent body diode of the N-channel series pass transistor. 2 weeks availability for non-standard devices between 0.5V and The AS1376 also features internal protection against over- 1.1V in 50mV steps and between 1.1V and 2.2V in 100mV temperature, over-current and under-voltage conditions. steps. The device is available in an 8-pin 2x2 TDFN package and is qualified for operation over the -40C to +85C temperature range. 3 Applications 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 The devices are ideal for powering cordless and mobile phones, on page 18. MP3 players, CD and DVD players, PDAs, hand-held computers, digital cameras and any other hand-held and/or battery-powered device. Figure 1. AS1376 - Typical Application Diagram www.austriamicrosystems.com/LODs/AS1376 Revision 1.4 1 - 19 ams AG Technical content still valid