AAT1201

Advanced Analog Technology, Inc. AAT1201 Details are subject to change without notice 250-mA MULTI-INPUT LOW-DROPOUT REGULATOR WITH DUAL-OUTPUT POWER MANAGEMENT Features z Complete Power Management Description The AAT1201 is a multi-input low-dropout z Automatic Input Voltage Selection regulator (LDO) designed for LAN card. It provides dual constant output supply 3.3V & 2.5V z Input Voltage Source Detector with Hysteresis at the output capable of driving a 250-mA load. z 250-mA Load Current Capability with VCC50 or VSB50 or AUX33 Input Source The output (OUT25) can be disabled by connecting EN25 pin to GND. z Integrated Low rDS(on ) Switch The AAT1201 provides dual regulated power z Dual Regulated Output 3.3V (fixed) & 2.5V output for systems with multiple input sources and (fixed) require dual constant voltage source with a z Output Short Circuit Protection (SCP) low-dropout voltage. This is an intelligent power www.DataSheet4U.com source selection device with a LDO regulator for Pin Configuration either VCC50 or VSB50 inputs, and a low-resistance bypass switch for the AUX33 TOP VIEW input. The AAT1201 allows transitions to progress VSB50 GND 8 1 smoothly from one input supply to another without generating a glitch outside of the specified range 2 7 GND VCC50 of the 3.3-V & 2.5-V output. The device is OUT33 3 6 EN25 equipped with an incorporated reverse-blocking scheme to prevent excess leakage from the input 4 5 OUT25 AUX33 terminals in the event when the output voltage i...