LOW VOLTAGE STEP-UP
DC-DC CONVERTER
January 29, 1998
SC1631
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The SC1631 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 87% can be easily achieved at 100mA 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 25碌H to 50碌H are recommended for most
applications.
FEATURES
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High efficiency 90%
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Power-saving shutdown mode (7碌A(chǔ) typical)
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Internal 2A 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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Palmtop and notebook computers
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Pocket organizers
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Cameras
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Pagers
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Battery backup supplies
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Portable instruments
BLOCK DIAGRAM
ORDERING INFORMATION
DEVICE
(1)
OUTPUT VOLTAGE
3.3V
3.0V
5.0V
PACKAGE
SO-8
SC1631CS
SC1631-3CS
SC1631-5CS
Note:
(1) Add suffix 鈥楾R鈥?for tape and reel.
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
Parameter
Supply Voltage
Operating
Temperature Range
Storage Temperature
Range
Symbol Maximum
V
IN
T
A
T
STG
7.0
0 to 70
-65 to 125
Units
V
擄C
擄C
漏 1997 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
SC1631-3CS相關(guān)型號(hào)PDF文件下載
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英文版
SC1602_ETC.pdf
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