AT73C237

Features www.DataSheet4U.com LDO1: 2.75V (Default) and 1.8V (Programmable by TWI), 70 mA Linear Very Low Drop Out Regulator with High PSRR and Low Noise. LDO2: 1.8V (Default) and 1.5V (Programmable by TWI), 70 mA Linear Low Drop Out Regulator with High PSRR and Low Noise. LDO3: 1.8V (Default) and 1.5V or 1.2V (Programmable by TWI), 70 mA Linear Low Drop Out Regulator with high PSRR and Low noise. LDO4: 1.8V, 2mA Linear Low Drop Out Regulator with Very Low Quiescent Current, +/100 mV Adjustable. Main Supply Rail from 2.8V to 5.5V Independent Auxiliary Supply for LDO4 Backup Section, 2.8V to 5.5V Internal State Machine for Startup and Delayed Reset Generation Additional External Reset Input Two Wire Interface for Independent Power Up/Power Down and Output Voltage Programming for Each LDO. LDOs Voltage Customization Possible on Request Available in 3 x 3 x 0.9 mm 16-pin QFN Package Applications: GPS Modules, WLAN Devices, Wireless Modules. Power Management and Analog Companions (PMAAC) AT73C237 4-channel Power Management for Wireless Modules 1. Description The AT73C237 is a four-channel Power Supply Power Management Unit (PMU) available in a small outline QFN 3 x 3mm package. It is a fully integrated, attractively priced, combined Power Management device for wireless modules, GPS and WLAN devices. It integrates 4X Linear Low Drop Out Regulators, three of which (LDO1, 2, 3) provide high-accuracy RF performance and 1X (LDO4) with very low quiescent c...