SC1157CS Datasheet PDF - Semtech Corporation
| Part Number | SC1157CS | |
| Description | PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORS | |
| Manufacturers | Semtech Corporation | |
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There is a preview and SC1157CS download ( pdf file ) link at the bottom of this page. Total 5 Pages | ||
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PROGRAMMABLE SYNCHRONOUS DC/DC
SC1157
CONTROLLER FOR ADVANCED PROCESSORS
Preliminary - August 7, 2000
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The SC1157 is a low-cost, full featured, synchronous
voltage-mode controller designed for use in single
ended power supply applications where efficiency is of
primary concern. Synchronous operation allows for the
elimination of heat sinks in many applications. The
SC1157 is ideal for implementing DC/DC converters
needed to power advanced microprocessors such as
Pentium® ll (Klamath), in both single and multiple pro-
cessor configurations. Internal level-shift, high-side
drive circuitry, and preset shoot-thru control, allows for
use of inexpensive n-channel power switches.
SC1157 features include an integrated 4-bit VID DAC,
temperature compensated voltage reference, triangle
wave oscillator, current limit comparator, frequency
shift over-current protection, and an internally compen-
sated error amplifier.
The SC1157 operates at a fixed 140KHz, providing an
optimum compromise between efficiency, external
component size, and cost.
PIN CONFIGURATION
FEATURES
•= Low cost / full featured
•= Synchronous operation
•= 4 Bit VID DAC programmable output
(1% tolerance)
•= Designed to meet Intel VRM8.2 (Pentium® II)
•= 1.5% Reference
APPLICATIONS
•= Pentium® II Core Supply
•= Multiple Microprocessor Supplies
•= Voltage Regulator Modules (VRM)
•= Programmable Power Supplies
•= High Efficiency DC/DC Conversion
ORDERING INFORMATION
DEVICE(1) PACKAGE(2)
SC1157CS.TR SO-16NB
TEMP. RANGE (TJ)
0 - 125°C
Note:
(1) Only available in tape and reel packaging. A reel
contains 2500 devices.
(2) “NB” indicates 150 MIL body.
BLOCK DIAGRAM
Top View
(16-Pin SOIC)
REF
VID3
VID2
VID1
VID0
VOSENSE
GND
VCC
CS- CS+
SHUTDOWN
REF
D/A
70mV
CURRENT
LIMIT
+
-
+
-
ERROR
AMP
-
+
LEVEL SHIFT AND
HIGH SIDE DRIVE
OSCILLATOR
R
Q
S
SHOOT-THRU
CONTROL
SYNCHRONOUS
MOSFET DRIVE
BSTH
DH
BSTL
DL
PGND
© 2000 SEMTECH CORP.
Pentium is a registered trademark of Intel Corporation
1
652 MITCHELL ROAD NEWBURY PARK CA 91320
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Preliminary - August 7, 2000
OUTLINE DRAWING SO-16
PROGRAMMABLE SYNCHRONOUS DC/DC
SC1157
CONTROLLER FOR ADVANCED PROCESSORS
LAND PATTERN SO-16
Jedec MS-012AC
ECN00-1243
© 2000 SEMTECH CORP.
5
652 MITCHELL ROAD NEWBURY PARK CA 91320
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for SC1157CS electronic component. |
| Information | Total 5 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ SC1157CS.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| SC1157CS | The function is PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORS. Semtech Corporation | |
| SC1157CS.TR | The function is PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORS. Semtech Corporation | |
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