AIC1633 Datasheet, PDF (1/10 Pages) Analog Intergrations Corporation – 2-Cell, 200mA, Step-Up DC/DC Converter

AIC1633
2-Cell, 200mA, Step-Up DC/DC Converter
FEATURES
High Efficiency Up To 87%.
Adjustable Output Voltage with Two Resistors
(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.
Pagers.
Bar-Code Scanners.
LCD Displays.
Battery Backup Supplies.
Portable Instruments.
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.
TYPICAL APPLICATION CIRCUIT
+V_OUT (3.3V)
LOAD
+V_IN
1N5819
D1
+
22µF
C2
TATAN
470Ω
R1
+
100µH
L
22µF
C1
NORMAL
10K
SD
R_ILIM
NOTE: V_IN≥1.8V, V_OUT≤7V
ILIM/SD
VIN
SW
SGND
VOUT
LBI
LBO
CGND
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: [phone] FAX: [phone]
www.analog.com.tw
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