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AAT3223

250mA NanoPower鈩?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 1.1碌A(chǔ). 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擄C to

+85擄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

鈥?/div>

PowerLinear

鈩?/div>

1.1碌A(chǔ) Quiescent Current

250mA Output Current

Low Dropout: 190mV (typical)

High Accuracy: 鹵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

鈥?/div>

Cellular Phones

Digital Cameras

Handheld Electronics

Notebook Computers

PDAs

Portable Communication Devices

Remote Controls

Typical Application

V

IN

1碌F

ON/OFF

EN

IN

OUT

V

OUT

100k

POK

GND

1碌F

POK

AAT3223

GND

3223.2005.04.1.4

1

型號(hào)

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描述

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