AAT3190 datasheet(1/16 Pages) ANALOGICTECH

部品番号	AAT3190

部品情報	Positive/Negative Charge Pump for Voltage Bias

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メーカー	ANALOGICTECH [Advanced Analogic Technologies]

ホームページ	http://www.analogictech.com

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General Description

The AAT3190 charge pump controller provides the

regulated positive and negative voltage biases

required by active matrix thin-film transistor (TFT)

liquid-crystal displays (LCDs), charge-coupled

device (CCD) sensors, and organic light emitting

diodes (OLEDs).

Two low-power charge pumps

convert input supply voltages ranging from 2.7V to

5.5V into two independent output voltages.

The dual low-power charge pumps independently

regulate a positive (V

POS) and negative (VNEG) out-

put voltage. These outputs use external diode and

capacitor multiplier stages (as many stages as

required) to regulate output voltages up to ±25V.

Built-in soft-start circuitry prevents excessive in-

rush current during start-up. A high switching fre-

quency enables the use of small external capaci-

tors. The device’s shutdown feature disconnects

the load from V

IN and reduces quiescent current to

less than 1.0µA.

The AAT3190 is available in an MSOP-8 or

TSOPJW-12 package and is specified over the

-40°C to +85°C operating temperature range.

Features

•V

IN Range: 2.7V to 5.5V

•

Adjustable ± Dual Charge Pump

•

Positive Supply Output Up to +25V

•

Negative Supply Output Down to -25V

•

Up to 30mA Output Current

•

1.0MHz Switching Frequency

•

<1.0µA Shutdown Current

•

Internal Power MOSFETs

•

Internally Controlled Soft Start

•

Fast Transient Response

•

Ultra-Thin Solution (No Inductors)

•

-40°C to +85°C Temperature Range

•

Available in 8-Pin MSOP or 12-Pin TSOPJW

Package

Applications

•

CCD Sensor Voltage Bias

•

OLEDs

•

Passive-Matrix Displays

•

Personal Digital Assistants (PDAs)

•

TFT Active-Matrix LCDs

AAT3190

Positive/Negative Charge Pump for Voltage Bias

Typical Application

AAT3190

INPUT

NEGATIVE

OUTPUT

POSTIVE

OUTPUT

IN

EN

DRVN

FBN

REF

GND

FBP

DRVP

EN

3190.2005.03.1.0

1

ChargePump™

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