LOW VOLTAGE STEP-UP
DC-DC CONVERTER
January 29, 1998
SC1633
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The SC1633 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. Efficiency
beyond 83% can be easily achieved at 70mA load with
2.2V to 3V input voltages.
A 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 providing extremely low supply current
operation.
A switching rate of 120kHz reduces the inductor size -
inductors of 47碌H to 150碌H inductance are
recommended for most applications.
FEATURES
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High efficiency 87%
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Power-saving shutdown mode (7碌A typical)
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Internal 0.8A switch
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120kHz switching rate
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Adjustable switch current limit
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On-chip low battery detector
APPLICATIONS
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Pocket organizers
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Electronic dictionaries
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Cameras
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Pagers
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Bar code scanners
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LCD displays
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Battery backup supplies
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Portable instruments
ORDERING INFORMATION
BLOCK DIAGRAM
DEVICE
(1)
VOLTAGE
3.3V
3.0V
5.0V
PACKAGE
SO-8
SC1633CS
SC1633-3CS
SC1633-5CS
Note:
(1) Add suffix 鈥楾R鈥?for tape and reel.
ABSOLUTE MAXIMUM RATINGS
Parameter
Supply Voltage
Operating
Temperature Range
Storage
Temperature Range
Symbol
V
IN
T
A
T
STG
Maximum
7.0
0 to 70
-65 to 125
Units
V
擄C
擄C
PIN CONFIGURATION
TYPICAL APPLICATION CIRCUIT
漏 1997 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
SC1633-3CS相關型號PDF文件下載
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英文版
SC1602_ETC.pdf
ETC
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英文版
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