Datasheet > ADM8829_15

ADM8829_15

更新时间： 2022-02-26 13:46:42

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
6页	76K
描述
Switched-Capacitor Voltage Inverter with Shutdown

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ADM8829_15 数据手册

Switched-Capacitor

Voltage Inverter with Shutdown

ADM8828/ADM8829

FUNCTIONAL BLOCK DIAGRAMS

FEATURES

Inverts Input Supply Voltage

99% Voltage Conversion Efficiency

25 mA Output Current

Shutdown Function

Requires Only Two Capacitors

1 ␮F Capacitors

CAP+

SHDN

GND

OUT

ADM8828

TOP VIEW

(Not to Scale)

CAP–

18 ⍀ Output Resistance

+1.5 V to +5.5 V Input Range

600 ␮A Quiescent Current

20 nA Shutdown Current (ADM8828)

CAP+

OUT

ADM8829

TOP VIEW

(Not to Scale)

CAP–

GND

NC = NO CONNECT

APPLICATIONS

Handheld Instruments

LCD Panels

Cellular Phones

PDAs

Remote Data Acquisition

Op Amp Power Supplies

GENERAL DESCRIPTION

+1.5V TO +5.5V

INPUT

The ADM8828/ADM8829 is a charge-pump voltage inverter

which may be used to generate a negative supply from a positive

input. Input voltages ranging from +1.5 V to +5.5 V can be

inverted into a negative –1.5 V to –5.5 V output supply. This

inverting scheme is ideal for generating a negative rail in single

power-supply systems. Only two small external capacitors are

needed for the charge pump. Output currents up to 25 mA with

greater than 99% efficiency are achievable.

CAP+

ADM8828/

ADM8829

1␮F

SHUTDOWN

CONTROL

SHDN

CAP–

INVERTED

OUT

GND

NEGATIVE

OUTPUT

+ 1␮F

The ADM8828 also features a low power shutdown (SHDN)

pin. This can be used to disable the device and reduce the quies-

cent current to 20 nA.

Figure 1. Typical Circuit Configuration

The ADM8828/ADM8829 is available in a 6-lead SOT-23

package.

REV. A

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwiseunderanypatentorpatentrightsofAnalogDevices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

World Wide Web Site: http://www.analog.com

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