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AAT3236
(Rev.:2001)

300mA CMOS High Performance LDO

Advanced Analogic Technologies 

Functional Block Diagram

IN

AAT3236

300mA CMOS High Performance LDO

Over-Current

Protection

Over-Temp

Protection

OUT

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 dis-

cussion in the section for details on device opera-

tion 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.

3236.2001.11.0.9

The LDO regulator output has been specifically

optimized to function with low cost, low ESR

ceramic capacitors. However, the design will allow

for operation over a wide range of capacitor types.

The device enable circuit is provided to shutdown

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 give the

AAT3236 a comprehensive safety system during

extreme adverse operating conditions.

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