AIC1653 Datasheet, PDF (1/11 Pages) Analog Intergrations Corporation – Micropower Inverting DC/DC Converter in SOT-23-5

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
V_IN
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
V_OUT
-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: [phone]
FAX: [phone] www.analog.com.tw
DS-1653-02 122203
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