AIC1633
2-Cell, 200mA, Step-Up DC/DC Converter
Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC www.analog.com.tw
DS-1633-03 Mar 15, 00 TEL: 886-3-5772500 FAX: 886-3-5772510 1
onesansinv FEATURES
tensans High Efficiency Up To 87%.
tensans Adjustable Output Voltage with Two Resistors
(AIC1633A)
tensans Power-Saving Shutdown Mode (7µA typical).
tensans Internal 0.8A Switch.
tensans 120KHz Switching Rate.
tensans Adjustable Switch Current Limit.
tensans On-Chip Low Battery Detector.

onesansinv APPLICATIONS
tensans Pocket Organizers.
tensans Electronic Dictionaries.
tensans Cameras.
tensans Pagers.
tensans Bar-Code Scanners.
tensans LCD Displays.
tensans Battery Backup Supplies.
tensans Portable Instruments.
onesansinv DESCRIPTION
The AIC1633 is a high efficiency step up DC/DC
converter. Only four external components are
required to deliver a fixed voltage of 3V, 3.3V, or
5V. The output voltage can be externally set to
an arbitrary value below breakdown voltage of
the power switch for AIC1633A. Efficiency
beyond 83% can be easily achieved at 70mA
load with 2.2V to 3V input voltages.
Logic-controlled shutdown mode is provided for
power saving. Switch current limit can be
programmed with a resistor. The low battery
detector can be configured as a linear regulator
or a burst mode controller performing an
extremely low supply current operation.
120KHz switching rate reduces the inductor size.
Inductors of 47µH to 150µH inductance are
recommended for most applications.
onesansinv TYPICAL APPLICATION CIRCUIT

AIC1633
100µH
L
+V
OUT
(3.3V)
LOAD
22µF
C1
22µF
C2
TATAN
NORMAL
R
ILIM
SD
ILIM/SD VOUT
VIN LBI
SW LBO
SGND CGND
1N5819
D1
+
+
470Ω
R1
10K
+V
IN
NOTE: V
IN
≥1.8V, V
OUT
≤7V
High-Efficiency Step-Up DC/DC Converter