MAX889

更新时间： 2024-10-02 22:55:11

品牌	Logo	应用领域
美信 - MAXIM		泵
页数	文件大小	规格书
8页	303K
描述
High-Frequency, Regulated, 200mA, Inverting Charge Pump

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数据手册

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MAX889 数据手册

19-1774; Rev 0; 7/00

High-Frequency, Regulated,

200mA, Inverting Charge Pump

General Description

Features

The MAX889 inverting charge pump delivers a regulated

negative output voltage at loads of up to 200mA. The

device operates with inputs from 2.7V to 5.5V to produce

o 200mA Output Current

o Up to 2MHz Switching Frequency

o Small Capacitors (1µF)

an adjustable, regulated output from -2.5V to -V .

The MAX889 is available with an operating frequency of

2MHz (T version), 1MHz (S version), or 0.5MHz (R ver-

sion). The higher switching frequency devices allow the

use of smaller capacitors for space-limited applica-

tions. The lower frequency devices have lower quies-

cent current.

o +2.7V to +5.5V Input Voltage Range

o Adjustable Regulated Negative Output

(-2.5V to -V )

o 0.1µA Logic-Controlled Shutdown

o Low 0.05Ω Output Resistance (in regulation)

o Soft-Start and Foldback Current Limited

o Short-Circuit and Thermal Shutdown Protected

o 8-Pin SO Package

The MAX889 also features a 0.1µA logic-controlled

shutdown mode and is available in an 8-pin SO pack-

age. An evaluation kit, MAX889SEVKIT, is available.

________________________Applications

Ordering Information

TFT Panels

TEMP.

PIN-

SWITCHING

PART

RANGE

PACKAGE FREQUENCY

Hard Disk Drives

MAX889TESA -40°C to +85°C

MAX889SESA -40°C to +85°C

MAX889RESA -40°C to +85°C

8 SO

2MHz

Camcorders

1MHz

Digital Cameras

0.5MHz

Measurement Instruments

Battery-Powered Applications

Typical Operating Circuit

Pin Configuration

INPUT +2.7V TO +5.5V

TOP VIEW

REGULATED

NEGATIVE

OUTPUT

CAP+

GND

AGND

SHDN

CAP+

OFF

(UP TO -1 × V ,

MAX889

UP TO 200mA)

SHDN

OUT

CAP-

AGND GND

________________________________________________________________ Maxim Integrated Products

For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

12 3 4 5 6 7 8

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