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AAT3236

300mA CMOS High Performance LDO

Advanced Analogic Technologies 

Functional Block Diagram

AAT3236

300mA CMOS High Performance LDO

IN

OUT

Over-Current

Protection

Over-Temperature

Protection

EN

BYP

Voltage

Reference

GND

Functional Description

The AAT3236 is intended for LDO regulator appli-

cations where output current load requirements

range from no load to 300mA. The AAT3236 is

capable of handling peak output currents up to

500mA. Refer to the Thermal Considerations sec-

tion of this datasheet for details on device operation

at 500mA peak loads.

The advanced circuit design of the AAT3236 pro-

vides excellent input-to-output isolation, which

allows for good power supply ripple rejection char-

acteristics. To optimize for very low output self

noise performance, a bypass capacitor pin has

been provided to decrease noise generated by the

internal voltage reference.

8

The LDO regulator output has been specifically

optimized to function with low-cost, low-equivalent

series resistance (ESR) ceramic capacitors.

However, the design will allow for operation over a

wide range of capacitor types.

The device enable circuit is provided to shut down

the LDO regulator for power conservation in portable

products. The enable circuit has an additional out-

put capacitor discharge circuit to assure sharp appli-

cation circuit turn-off upon device shutdown.

This LDO regulator has complete short-circuit and

thermal protection. The integral combination of

these two internal protection circuits gives the

AAT3236 a comprehensive safety system during

extreme adverse operating conditions.

3236.2007.03.1.4

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