AAT3223 Datasheet, PDF (1/17 Pages) Advanced Analogic Technologies – 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 which is typically 1.1µA. Dropout voltage is
also very low, typically 190mV at 100mA. The
AAT3223 has an enable pin feature 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-powered applications. The
AAT3223 also has a Power-OK (POK) feature.
The POK function 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 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.
AAT3223
250mA NanoPower™ LDO
Linear Regulator with Power-OK
Features
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
• Cellular Phones
• Digital Cameras
• Handheld Electronics
• Notebook Computers
• PDAs
• Portable Communication Devices
• Remote Controls
Typical Application
V_IN
IN
OUT
VOUT
1µF
ON/OFF
AAT3223
EN
POK
GND
100k
1µF
POK
GND
GND
3223.2005.04.1.4
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