AAT3236
300mA CMOS High Performance LDO
Functional Block Diagram
IN
OUT
Over-Current
Protection
Over-Temperature
Protection
EN
BYP
Voltage
Reference
GND
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.
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 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.
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.
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.
8
3236.2007.03.1.4
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
