AIC1653

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

Analog Integrations Corporation

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

DS-1653-02 122203

TEL: 886-3-5772500

FAX: 886-3-5772510

www.analog.com.tw

1

FEATURES

Low Quiescent Current:

15

µA in Active Mode

<1

µA 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 15

µA

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

L1

22

µH

C3

0.22

µF

L2

22

µH

D1

C1

4.7

µF

2.5V~5V

R1

150k

R2

39K

C2

4.7

µF

-6V/14mA

VIN

5

SHDN

4

GND

2

SW

1

NFB 3

AIC1653

RB521S-30

L1,L2: TOKO D312F 22

µH

D1: Rohm RB521S-30

C1,C2,C3: TAIYO YUDEN Ceramic capacitors