AIC1633
2-Cell, 200mA, Step-Up DC/DC Converter
ꢀ FEATURES
ꢀ DESCRIPTION
ꢀ High Efficiency Up To 87%.
The AIC1633 is a high efficiency step up DC/DC
ꢀ Adjustable Output Voltage with Two Resistors
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.
(AIC1633A)
ꢀ Power-Saving Shutdown Mode (7µA typical).
ꢀ Internal 0.8A Switch.
ꢀ 120KHz Switching Rate.
ꢀ Adjustable Switch Current Limit.
ꢀ On-Chip Low Battery Detector.
ꢀ APPLICATIONS
ꢀ Pocket Organizers.
ꢀ Electronic Dictionaries.
ꢀ Cameras.
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.
ꢀ Pagers.
ꢀ Bar-Code Scanners.
ꢀ LCD Displays.
ꢀ Battery Backup Supplies.
ꢀ Portable Instruments.
120KHz switching rate reduces the inductor size.
Inductors of 47µH to 150µH inductance are
recommended for most applications.
ꢀ TYPICAL APPLICATION CIRCUIT
470Ω
NORMAL
10K
+VIN
+
R1
ILIM/SD
VIN
VOUT
LBI
22µF
RILIM
SD
100µH
C1
L
1N5819
+VOUT (3.3V)
LOAD
D1
SW
LBO
+
SGND
CGND
22µF
C2
NOTE: VIN≥1.8V, VOUT≤7V
TATAN
AIC1633
High-Efficiency Step-Up DC/DC Converter
Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
DS-1633-03 Mar 15, 00 TEL: 886-3-5772500 FAX: 886-3-5772510
www.analog.com.tw
1
AIC [ ANALOG INTERGRATIONS CORPORATION ]
