AAT1205-S AAT [Advanced Analog Technology, Inc.], AAT1205-S Datasheet

AAT1205-S

Manufacturer Part Number

AAT1205-S

Description

400-mA MULTI-INPUT LOW-DROPOUT REGULATOR WITH DUAL OUTPUT POWER MANAGEMENT

Manufacturer

AAT [Advanced Analog Technology, Inc.]

Datasheet

1.AAT1205-S.pdf (21 pages)

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Details are subject to change without notice

Features

Pin Configuration

OUT33

VSB50

VCC50

Complete Power Management

Automatic Input Voltage Selection

Input Voltage Source Detector With

Hysteresis

400-mA Load Current Capability With

VCC50、VSB50 or AUX33 Input Source

Integrated Low

Dual Regulated Output 3.3V（fixed）& 2.5V

（fixed）

Output Short Circuit Protection (SCP)

AUX33

( 8-PIN SOP )

TOP VIEW

400-mA MULTI-INPUT LOW-DROPOUT REGULATOR WITH DUAL

Advanced Analog Technology, Inc.

( )

–

Switch

OUT25

GND

EN25

Advanced Analog Technology, Inc

台灣類比科技股份有限公司

Page 1 of 21

Description

The AAT1205 is a multi-input low-dropout

regulator (LDO) specially designed for LAN cards.

It provides advanced dual constant output supply

3.3V & 2.5V at the output capable of driving a

400-mA load.

disabled by connecting EN25 pin to GND.

The AAT1205 is equipped with dual regulated

power output for systems with multiple input

sources and require dual constant voltage source

with a low-dropout voltage. This is an intelligent

power source selection device with a low-dropout

regulator for either VCC50 or VSB50 inputs, and

a low-resistance bypass switch for the AUX33

input.

The AAT1205 allows transitions to progress

smoothly from one input supply to another without

generating a glitch outside of the specified range

of 3.3V & 2.5V output. Furthermore, this device

has an incorporated reverse-blocking scheme to

prevent excessive leakage from the input terminals

in the event that the output voltage is greater than

the input voltage.

The input voltage is prioritized in the following

order: VCC50, VSB50, AUX33.

OUTPUT POWER MANAGEMENT

The output (OUT25) can be

–

V 1.0

AAT1205

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