AIC1610/AIC1611
High Efficiency Synchronous Step-Up DC/DC
Converter




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FEATURES
null High Efficiency (93% when VIN=2.4V,
V
OUT
=3.3V, I
OUT
=200mA)
null Output Current up to 500mA. (AIC1610 at
V
IN
=2.4V and V
OUT
=3.3V)
null 20µA Quiescent Supply Current.
null Power-Saving Shutdown Mode (0.1µA typical).
null Internal Synchronous Rectifier (No External Di-
ode Required).
null On-Chip Low Battery Detector.
null Low Battery Hysteresis
null Space-Saving Package: MSOP-8


APPLICATIONS
null Palmtop & Notebook Computers.
null PDAs
null Wireless Phones
null Pocket Organizers.
null Digital Cameras.
null Hand-Held Devices with 1 to 3-Cell of
NiMH/NiCd Batteries.

DESCRIPTION
The AIC1610/AIC1611 are high efficiency
step up DC-DC converters. The start-up volt-
age is as low as 0.8V with operating voltage
down to 0.7V. Simply consuming 20µA of qui-
escent current. These devices offer a built-in
synchronous rectifier that reduces size and
cost by eliminating the need for an external
Schottky diode and improves overall effi-
ciency by minimizing losses.
The switching frequency can range up to
500KHz depending on the load and input volt-
age. The output voltage can be easily set by
two external resistors from 1.8V to 5.5V,
connecting FB to OUT to get 3.3V, or con-
necting to GND to get 5.0V. The peak current
of the internal switch is fixed at 1.0A (AIC1610)
or 0.65A (AIC1611) for design flexibility.


TYPICAL APPLICATION CIRCUIT

Output 3.3V, 5.0V
or Adj. (1.8V to 5.5V)
up to 300mA
Low-battery
Detect Out
AIC1610
AIC1611

OUT
FBGNDREF
LBO
SHDN
LX
LBI
+
ON OFF
+
Low Battery
Detection
0.1µF
V
IN
22µH

47µF

47µF


Analog Integrations Corporation Si-Soft Research Center DS-1610P-03 010405
3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C.
TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw 1