Datasheet > MAX1730

MAX1730

更新时间： 2024-11-25 14:57:43

品牌	Logo	应用领域
亚德诺 - ADI		泵
页数	文件大小	规格书
8页	178K
描述
50mA、稳压型、降压型电荷泵，用于1.8V或1.9V逻辑电路

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数据手册

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MAX1730 数据手册

19-1618; Rev 0; 4/00

50mA Regulated Step-Down Charge Pump

for 1.8V or 1.9V Logic

General Description

Features

ꢀ > 85% Peak Efficiency

The MAX1730 regulated step-down charge pump gen-

erates up to 50mA at fixed output voltages of 1.8V or

1.9V from an input voltage in the 2.7V to 5.5V range.

Specifically designed to provide high-efficiency logic

supplies in applications that demand a compact

design, the MAX1730 employs fractional conversion

techniques to provide efficiency exceeding that of a lin-

ear regulator.

ꢀ 50mA Guaranteed Output Current

ꢀ Dual-Mode 1.8V or 1.9V Output

ꢀ ±±% Output Voltaꢀe Accuracy

ꢀ Up to 2MHz Operatinꢀ Frequency

ꢀ Small 0.22µF Capacitors

The MAX1730 operates at up to 2MHz, permitting the

use of small 0.22µF flying capacitors while maintaining

low 75µA quiescent supply current. Proprietary soft-

start circuitry prevents excessive current from being

drawn from the supply during startup, making the

MAX1730 compatible with higher impedance sources

such as alkaline and lithium-ion cells.

ꢀ No Inductor Required

ꢀ 2.7V to 5.5V Input Voltaꢀe Ranꢀe

ꢀ Output Disconnects from Input in Shutdown Mode

ꢀ Small 10-Pin µMAX Packaꢀe (1.09mm max heiꢀht)

The MAX1730 is available in a space-saving 10-pin

µMAX package that is only 1.09mm high and occupies

one-half the area of an 8-pin SO.

Applications

Ordering Information

Low-Voltage Logic Supplies

Wireless Handsets

PDAs

PART

TEMP. RANGE

PIN-PACKAGE

MAX1730EUB

-40°C to +85°C

10 µMAX

PC Cards

Hand-Held Instruments

Pin Configuration

Typical Operating Circuit

TOP VIEW

INPUT

2.7V TO 5.5V

1 F

SHDN

C1P

10 IN

OUTPUT

OUT

C2P

1.8V OR 1.9V, UP TO 50mA

MAX1730

OUT

C2P

SHDN

4.7 F

C1N

C2N

PGND

MAX1730

GND

C1P

MAX

0.22 F

C1N

C2N

PGND

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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