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General Description

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

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.

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

TFT Panels

Hard Disk Drives

Camcorders

Digital Cameras

Measurement Instruments

Battery-Powered Applications

Features

♦ 200mA Output Current

♦ Up to 2MHz Switching Frequency

♦ Small Capacitors (1µF)

♦ +2.7V to +5.5V Input Voltage Range

♦ Adjustable Regulated Negative Output

(-2.5V to -V

)

♦ 0.1µA Logic-Controlled Shutdown

♦ Low 0.05Ω Output Resistance (in regulation)

♦ Soft-Start and Foldback Current Limited

♦ Short-Circuit and Thermal Shutdown Protected

♦ 8-Pin SO Package

MAX889

High-Frequency, Regulated,

200mA, Inverting Charge Pump

________________________________________________________________ Maxim Integrated Products 1

SHDN

OUTCAP-

AGND

FBCAP+

GND

TOP VIEW

MAX889

Pin Configuration

MAX889

INPUT +2.7V TO +5.5V

REGULATED

NEGATIVE

OUTPUT

(UP TO -1 × V

UP TO 200mA)

OUT

GNDAGND

CAP+

OFF

SHDN

CAP-

Typical Operating Circuit

19-1774; Rev 0; 7/00

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.

Ordering Information

PART

TEMP.

RANGE

PIN-

PACKAGE

SWITCHING

FREQUENCY

MAX889TESA -40°C to +85°C

8 SO 2MHz

MAX889SESA -40°C to +85°C

8 SO 1MHz

MAX889RESA -40°C to +85°C

8 SO 0.5MHz

EVALUATION KIT

AVAILABLE

1 2 3 4 5 6 7 8

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Página 1 - 200mA, Inverting Charge Pump

General DescriptionThe MAX889 inverting charge pump delivers a regulatednegative output voltage at loads of up to 200mA. Thedevice operates with input

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MAX889High-Frequency, Regulated, 200mA, Inverting Charge Pump2 _______________________________________________________________________________________

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MAX889High-Frequency, Regulated, 200mA, Inverting Charge Pump_______________________________________________________________________________________ 3

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MAX889High-Frequency, Regulated, 200mA, Inverting Charge Pump4 _______________________________________________________________________________________

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MAX889High-Frequency, Regulated, 200mA, Inverting Charge Pump_______________________________________________________________________________________ 5

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MAX889(ESR) of the flying and output capacitors. The typicaloutput impedance is more accurately determined fromthe Typical Operating Characteristics.C

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MAX889High-Frequency, Regulated, 200mA, Inverting Charge Pump_______________________________________________________________________________________ 7

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MAX889High-Frequency, Regulated, 200mA, Inverting Charge PumpMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely

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Rainbow-electronics MAX889 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Sensores Rainbow-electronics MAX889. Rainbow Electronics MAX889 User Manual Manual do Utilizador

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