SC1630 Просмотр технического описания (PDF) - Semtech Corporation
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SC1630 Datasheet PDF : 8 Pages
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LOW VOLTAGE MULTI-MODE
DC-DC CONVERTER
SC1630
January 30, 1998
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The SC1630 is a DC-DC converter designed to drive
an external power switch for more flexibility, especially
in higher voltage and larger power applications.
Typically six components are required to set up a
step-up configuration easily achieving an efficiency
beyond 80%. A few more components are required to
set up a step down configuration delivering 4A load
current with 83% typical efficiency, 86% at 2A load,
and 300µA quiescent current.
The output voltage can be internally set to 5V or
externally set to an arbitrary value below breakdown
voltage of the power switch. Logic-controlled
shutdown mode is provided for power-saving. The low
battery detector can also be configured as a linear
regulator.
A 120kHz switching rate reduces the inductor size.
Inductors of 25µH to 50µH inductance are
recommended for most applications.
FEATURES
• Default +5V output voltage
• Adjustable output voltage with two resistors
• Power-saving shutdown mode (7µA typical)
• 120kHz switching rate
• On-chip low battery detector
BLOCK DIAGRAM
APPLICATIONS
• Palmtop and notebook computers
• Battery charger supply
• Cellular telephones
• LCD contrast supply
• Flash memory programmer
• Battery backup supplies
• Portable instruments
ORDERING INFORMATION
DEVICE(1)
PACKAGE
SC1630CS
SO-8
Note:
(1) Add suffix ‘TR’ for tape and reel.
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
Parameter
Supply Voltage
Operating
Temperature Range
Storage Temperature
Range
Symbol
VIN
TA
TSTG
Maximum
7.0
0 to 70
-65 to 125
Units
V
°C
°C
© 1997 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
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