AAT3223
250mA NanoPower™ LDO
Linear Regulator with Power-OK
General Description
The AAT3223 PowerLinear NanoPower low
dropout (LDO) linear regulator is ideal for portable
applications where extended battery life is critical.
This device features extremely low quiescent cur-
rent, typically 1.1µA. Dropout voltage is also very
low, typically 190mV at 100mA. The AAT3223 has
an enable pin which, when pulled low, will put the
LDO regulator into shutdown mode, removing
power from its load and offering extended power
conservation capabilities for portable battery-pow-
ered applications. The AAT3223 also has a Power-
OK (POK) feature which monitors the LDO output
voltage and will alert the system if the output falls
out of regulation.
The AAT3223 has output short-circuit and over-
current protection. In addition, the device has an
over-temperature protection circuit, which will shut
down the LDO regulator during extended over-cur-
rent events.
The AAT3223 is available in a Pb-free, space-saving
6-pin SOT23 package and is rated over the -40°C to
+85°C temperature range.
The AAT3223 is similar to the AAT3221 with the
exception that it offers the additional Power-OK
function through the POK pin.
Features
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PowerLinear
™
1.1µA Quiescent Current
250mA Output Current
Low Dropout: 190mV (typical)
High Accuracy: ±2%
Current Limit Protection
Over-Temperature Protection
Extremely Low Power Shutdown Mode
Low Temperature Coefficient
Stable Operation With Virtually Any Output
Capacitor Type
Power-OK Signal Output
Active High Enable Pin
4kV ESD
Factory-Programmed Output Voltages
6-pin SOT23 Package
Applications
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Cellular Phones
Digital Cameras
Handheld Electronics
Notebook Computers
PDAs
Portable Communication Devices
Remote Controls
Typical Application
V
IN
1µF
ON/OFF
EN
IN
OUT
V
OUT
100k
POK
GND
1µF
POK
AAT3223
GND
GND
3223.2006.03.1.5
1
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
