AAT1202

Advanced Analog Technology, Inc. AAT1202 250-mA MULTI-INPUT LOW-DROPOUT REGULATOR WITH DUAL -OUTPUT POWER MANAGEMENT Features z Complete Power Management Description The AAT1202 is a multi-input low-dropout regulator that provides dual constant output supply z Automatic Input Voltage Selection 3.3V & 1.8V at the output capable of driving a z Input Voltage Source Detector With 250-mA load. Hysteresis The output (OUT18) can be disable by connect EN18 pin to GND. z 250-mA Load Current Capability With The AAT1202 provides dual regulated power VCC50 or VSB50 or AUX33 Input Source output for systems that have multiple input z Integrated Low rDS (on) Switch sources and require dual constant voltage source with a low-dropout voltage. This is a intelligent z Dual Regulated Output 3.3V (fixed) & 1.8V power source selection device with a low-dropout (fixed) regulator for either VCC50 or VSB50 inputs, and z Output Short Circuit Protection a low-resistance bypass switch for the AUX33 www.DataSheet4U.com input. Transitions may occur from one input supply to Pin Configuration another without generating a glitch outside of the specification range on the 3.3-V & 1.8-V output. TOP VIEW The device has an incorporated reverse-blocking scheme to prevent excess leakage from the input VSB50 GND 8 1 terminals in the event that the output voltage is greater than the input voltage. GND 7 2 VCC50 The input voltage is prioritized in the following OUT33 EN18 3 6 order: VCC50, VSB50, AUX33. AUX33 4 5 O...