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 AS1364 1A Low Dropout Linear Voltage Regulator 1 General Description 2 Key Features Guaranteed Output Current: 1A The AS1364 is a low-dropout linear regulator (LDO) designed to operate from 2V to 5.5V input, that delivers a wide range of highly Low Dropout: 140mV 1A accurate (0.75%) factory-trimmed output voltages as well as adjustable output voltages (using an external resistor-divider Output Voltage Accuracy: Up to 0.75% network). 2.0V to 5.5V Input Voltage The ultra-low dropout device requires only 140mV dropout voltage while delivering a guaranteed 1A load current and is therefore Fixed VOUT: 1.2V to 5.0V perfectly suited for battery-operated portable applications. Adjustable VOUT: 1.2V to 5.3V Additionally the AS1364 offers extremely low 10VRMS (100Hz to Low Ground Current: 35A 100kHz) or 45VRMS (10Hz to 1MHz) output voltage noise. Low Shutdown Current: 10nA Table 1. Standard Products Low Output Noise: 45VRMS (from 10Hz to 1MHz) Model Output Type BYP SET AS1364-AD Adjustable No Yes Thermal Overload Protection AS1364- Fixed Yes No Output Current Limit Output discharge path during shutdown The device features an internal PMOS pass transistor (for a low supply current of only 35A), reset output, a low-power shutdown 8-pin TDFN 3x3mm Package mode, and protection from short-circuit and thermal-overload conditions. 3 Applications When in shutdown, a 5k (typ) discharge path is connected between the output pin and ground. The AS1364 is available in a The device is ideal for laptops, PDAs, portable audio devices, mobile 8-pin TDFN 3x3mm package. phones, cordless phones, and any other battery-operated portable device. Figure 1. AS1364 - Typical Application Diagram 3 6 IN OUT VIN VOUT 4 5 COUT CIN 4.7F IN OUT 4.7F AS1364 1 2 On Off Reset Output POK EN CBYP 7 10nF 8 SET/BYP GND www.austriamicrosystems.com Revision 1.8 1 - 19 ams AG Technical content still valid