Datasheet > A7801

A7801

更新时间： 2024-11-24 01:14:35

品牌	Logo	应用领域
创瑞 - AITSEMI		DC-DC转换器
页数	文件大小	规格书
10页	266K
描述
DC-DC CONVERTER LOW NOISE, REGULATED CHARGE PUMP

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A7801 数据手册

A7801

AiT Semiconductor Inc.

DC-DC CONVERTER

www.ait-ic.com

LOW NOISE, REGULATED CHARGE PUMP

DESCRIPTION

FEATURES

The A7801 is a low noise, constant frequency

(400kHz) switched capacitor voltage doubler. It

produce a regulated output voltage from a 2.5V to

5.5V input with up to 250mA of output current. Low

external parts count (one flying capacitor and two

small bypass capacitors at V_INand V_OUT) make the

A7801 ideally suited for small, battery-powered

applications.



Fixed 5V ± 4% Output

V_INRange: 2.5V to 5.5V

Output Current: Up to 250mA

Constant Frequency Operation at All Loads

Low Noise Constant Frequency (400kHz)

Operation



Automatic Soft-Start Reduces Inrush Current

Shutdown Current <1uA

new charge-pump architecture maintains

Short-Circuit Protection

constant switching frequency to zero load and

reduces both output and input ripple. The A7801

have thermal shutdown capability and can survive a

continuous short circuit from V_OUTto GND. Built-in

soft-start circuitry prevents excessive inrush current

during start-up.

No Inductors

Available in SOT-26 Package

APPLICATION



White LED Backlighting

Li-Ion Battery Backup Supplies

Local 3V to 5V Conversion

Smart Card Readers

High switching frequency enables the use of small

ceramic capacitors. A low current shutdown feature

disconnects the load from V_INand reduces

quiescent current to <1uA.

PCMCIA Local 5V Supplies

TYPICAL APPLICATION

The A7801 is available in SOT-26 package.

ORDERING INFORMATION

Package Type

SOT-26

Part Number

A7801E6R

A7801E6VR

Figure 1. Basic Application Circuit with A7801

V: Halogen free Package

R: Tape & Reel

Note

AiT provides all RoHS products

Suffix “ V “ means Halogen free Package

REV1.0

- JAN 2015 RELEASED -

- 1 -

12 3 4 5 6 7...10

中文翻译

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