Datasheet > AAT2820

AAT2820

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
ANALOGICTECH		稳压器泵
页数	文件大小	规格书
18页	437K
描述
Triple-Output Charge Pump Regulator

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AAT2820 数据手册

AAT2820

Triple-Output Charge Pump Regulator

™

ChargePump

General Description

Features

The AAT2820 is a member of AnalogicTech's Total

Power Management IC™ (TPMIC™) product fam-

ily. It is a triple output charge pump targeted for

active matrix thin-film transistor (TFT), liquid crys-

tal displays (LCDs), and CCD camera bias for sys-

tems operating with lithium-ion/polymer batteries.

The device generates three regulated output volt-

ages for turn-on gate drive bias (V_POS), turn-off

gate voltage bias (V_NEG), and logic voltage.

•

V_INRange: 2.7V to 5.5V

5V Regulated Output Voltage

Two Adjustable Regulated Output Voltages:

V_POSand V_NEG

— Positive Charge Pump Up to +25V

— Negative Charge Pump Down to -25V

— Optional Power-Up Sequence with

AAT2820-1

Internal Power MOSFETs

<1µA of Shutdown Current

Internally Controlled Soft Start

Fast Transient Response

Ultra-Thin Solution (No Inductors)

16-Pin TDFN44 Package

•

The V_POSand V_NEGoutput voltages are independ-

ently regulated. Both outputs use external diode

and capacitor multiplier stages (as many stages as

required) to regulate output voltages up to +25V

and -25V. An additional regulated output voltage is

provided for biasing the display module. Built-in

soft-start circuitry prevents excessive inrush current

during start-up. A high switching frequency enables

the use of very small external capacitors. A low

shutdown feature disconnects the load from V_INand

reduces quiescent current to less than 0.1µA.

Temperature Range: -40°C to +85°C

Applications

•

CCD Cameras

The AAT2820 is available in a Pb-free TDFN44-16

package and is specified over the -40°C to +85°C

operating temperature range.

Hand-Held Instruments

Passive-Matrix Displays

Personal Digital Assistants (PDAs)

TFT Active-Matrix LCDs

Typical Application

C_FLY

C+

C-

Enable

C_IN

Enable (Positive and

Negative Output)

EN/PN

OUT

V_OUT

DRVN

C_OUT

AAT2820

FBN

DRVP

V_NEG

REF

FBP

V_POS

GND

2820.2006.04.1.4

12 3 4 5 6 7...18

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