AAT3242

300mA/150mA Dual CMOS LDO Linear Regulator General Description The AAT3242 is a dual low dropout linear regulator with Power OK (POK) outputs. Two integrated regulators provide a high power 300mA output and a lower power 150mA output, making this device ideal for use with microprocessors and DSP cores in portable products. Two POK pins provide open drain output signals when their respective regulator output is within regulation. The AAT3242 has independent input voltage and enable pins for increased design flexibility. This device features a very low quiescent current (140µA typical) and low dropout voltages (typically 200mV and 400mV at the full output current level), making it ideal for portable applications where extended battery life is critical. The AAT3242 has complete over-current/short-circuit and over-temperature protection circuits to guard against extreme operating conditions. The AAT3242 is available in a space-saving, Pbfree, 12-pin TSOPJW package. This device is capable of operation over the -40°C to +85°C temperature range. AAT3242 Features PowerLinear™ High/Low Current Outputs, 300mA/150mA Low Dropout: — LDO A: 400mV at 300mA — LDO B: 200mV at 150mA High Output Voltage Accuracy: ±1.5% High PSRR: 65dB at 1kHz 70µA Quiescent Current for Each LDO Over-Current/Short-Circuit Protection Over-Temperature Protection Two POK Outputs Independent Power and Enable Inputs Uses Low Equivalent Series Resistance (ESR) Ceramic Capacitors 12-Pin TSOP...