AIC1653 데이터 시트보기 (PDF) - Analog Intergrations

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AIC1653

Micropower Inverting DC/DC Converter in SOT-23-5

Analog Intergrations 

AIC1653

Micropower Inverting DC/DC Converter in SOT-23-5

FEATURES

Low Quiescent Current:

15µA in Active Mode

<1µA in Shutdown Mode

Operates with VIN as Low as 1.8V

Uses Small Surface Mount Components

High Output Voltage: Up to -28V

Low profile 5-Lead SOT-23-5 Package

APPLICATIONS

LCD Bias

Hand-Held Computers

Battery Backup

Digital Still Cameras

DESCRIPTION

The AIC1653 is a micropower inverting DC/DC

converter in 5-lead SOT-23 package. It is designed

for power systems with a 100mA current limit and

an input voltage ranging from 1.8V to 10V. Besides,

AIC1653 features a quiescent current of only 15µA

at no load, which further reduces to 0.5µA when

shutdown. The schemes of current limited and

fixed off-time control conserve operating current,

resulting in high efficiency over a broad range of

load current. In addition, the 30V switch of

AIC1653 allows high voltage outputs up to -28V,

which is easily generated without the use of costly

transformers. The AIC1653’s low off-time of 400ns

permits the use of tiny, low profile inductors and

capacitors to minimize footprint and cost in

space-conscious portable applications.

TYPICAL APPLICATION CIRCUIT

VIN

2.5V~5V

C1

4.7µF

L1

22µH

5

1

VIN SW

4

SHDN

2 GND NFB 3

AIC1653

C3

0.22µF

L2

22µH

D1

R1

RB521S-30 150k

R2

39K

VOUT

-6V/14mA

C2

4.7µF

L1,L2: TOKO D312F 22µH

D1: Rohm RB521S-30

C1,C2,C3: TAIYO YUDEN Ceramic capacitors

Analog Integrations Corporation

4F, 9 Industry E. 9th Rd, Science-Based Industrial Park, Hsinchu, Taiwan

TEL: 886-3-5772500

FAX: 886-3-5772510 www.analog.com.tw

DS-1653-02 122203

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