AAT4686 datasheet(1/13 Pages) ANALOGICTECH

Part #	AAT4686

Description	MOSFET Driver IC with Over-Voltage Protection

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Manufacturer	ANALOGICTECH [Advanced Analogic Technologies]

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AAT4686

MOSFET Driver IC with Over-Voltage Protection

OVPSwitchTM

PRODUCT DATASHEET

4686.2008.02.1.0

1

www .analogictech.com

General Description

The AAT4686 OVPSwitch™ is a member of AnalogicTech’s

Application Specific Power MOSFET™ (ASPM™) product

family. It is a P-channel MOSFET driver IC with precise

over-voltage protection control, designed to protect low-

voltage systems against high-voltage faults up to +28V.

If the input voltage exceeds the programmed over-volt-

age threshold, the external P-channel MOSFET switch

will be turned off to prevent damage to the output load

circuits. The AAT4686 is available with an internally pro-

grammed over-voltage trip point or as an adjustable

version programmed by a two external resistors.

The AAT4686 also includes an under-voltage lockout

(UVLO) protection circuit, which will put the device into

sleep mode at low input voltages only consuming < 1μA

of current.

The AAT4686 is offered in a small Pb-free, 8-pin SC70JW

package, and is specified for operation over the -40°C to

+85°C ambient temperature range.

Features

• Over-Voltage Protection up to 28V

• (Fixed or Adjustable) Over-Voltage Protection Threshold

• Fast OVP Response:

▪ 1 μs (Max) to Over-Voltage Transient

• Low Operation Quiescent Current

▪ 30μA Typical

▪ 1μA Max in Shutdown (Disabled)

• Drives External P-Channel MOSFETs

• Under-Voltage Lockout

• Temperature Range: -40 to 85°C

• Available in SC70JW-8 Package

Applications

• Cell Phones

• Digital Still Cameras

• GPS

• MP3 Players

• Personal Data Assistants (PDA)

• USB Hot Swap / Live Insertion Devices

Typical Application

1μF

IN

FLT

EN

GATE

GND

VIN

Fault Flag

VOUT

3.75V – 28V

+5V

Fixed Version*

1μF

IN

OVP

FLT

EN

GATE

GND

VIN

Fault Flag

VOUT

3.75V – 28V

+5V

Adjustable Version

* Contact manufacturer for available options.

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