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PDF SC1153CSW Data sheet ( Hoja de datos )
| Número de pieza | SC1153CSW | |
| Descripción | PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORS | |
| Fabricantes | Semtech Corporation | |
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PROGRAMMABLE SYNCHRONOUS DC/DC
CONTROLLER FOR ADVANCED PROCESSORS
SC1153
PRELIMINARY - October 3, 2000
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The SC1153 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
SC1153 is ideal for implementing DC/DC converters
needed to power advanced microprocessors, such as
Pentium® lll, in both single and multiple processor con-
figurations. Internal level-shift, high-side drive circuitry,
and preset shoot-thru control, allows for use of inex-
pensive n-channel power switches.
SC1153 features include an integrated 5-bit VID DAC,
temperature compensated voltage reference, triangle
wave oscillator, current limit comparator, frequency
shift over-current protection, and an accessible, inter-
nally compensated error amplifier. Power good signal-
ing, logic compatible shutdown, and over voltage pro-
tection are also provided.
The SC1153 operates at a fixed 200KHz, providing an
optimum compromise between efficiency, external
component size, and cost.
FEATURES
•= Low cost / full featured
•= Synchronous operation
•= 5 Bit VID programmable output
•= On-chip power good and OVP functions
•= Designed to meet Intel VRM 8.4 (Pentium® IlI)
•= 1.3V to 3.5V Range, 1% tolerance
APPLICATIONS
•= Pentium® IlI Core Supply
•= Multiple Microprocessor Supplies
•= Voltage Regulator Modules (VRM)
•= Programmable Power Supplies
•= High Efficiency DC/DC Conversion
ORDERING INFORMATION
DEVICE(1)
PACKAGE TEMP. RANGE (TJ)
SC1153CSW.TR SO-20
0 - 125°C
Note:
(1) Only available in tape and reel packaging. A reel
contains 1000 devices.
PIN CONFIGURATION
BLOCK DIAGRAM
Top View
(20-Pin SOIC)
VCC CS- CS+
SHUTDOWN
1.25V REF
VID4
VID3
VID2
VID1
VID0
D/A
VOSENSE
PWRGOOD
OPEN COLLECTORS
VCC
70mV
CURRENT LIMIT
OSCILLATOR
200kHz
R
Q
S
ERROR
AMP
OVP
GND
UPPER FET
LEVEL SHIFT
AND DRIVE
BSTH
DH
PGNDH
SHOOT-THRU
CONTROL
SYNCHRONOUS
FET DRIVE
BSTL
DL
PGNDL
© 2000 SEMTECH CORP.
Pentium is a registered trademark of Intel Corporation
1
652 MITCHELL ROAD NEWBURY PARK CA 91320
1 page  
PROGRAMMABLE SYNCHRONOUS DC/DC
CONTROLLER FOR ADVANCED PROCESSORS
SC1153
PRELIMINARY - October 3, 2000
OUTPUT VOLTAGE TABLE
Unless specified: VCC = 5.00V; GND = PGND = 0V; FB = VO; 0mV < (CS(+) - CS(-)) < 60mV; TJ = 25°C
PARAMETER
Output Voltage
CONDITIONS
IO = 2A in Application Circuit
(Figure 1)
VID
43210
01111
01110
01101
01100
01011
01010
01001
01000
00111
00110
00101
00100
00011
00010
00001
00000
11111
11110
11101
11100
11011
11010
11001
11000
10111
10110
10101
10100
10011
10010
10001
10000
MIN
1.287
1.336
1.386
1.435
1.485
1.534
1.584
1.633
1.683
1.732
1.782
1.832
1.881
1.931
1.980
2.030
1.980
2.079
2.178
2.277
2.376
2.475
2.574
2.673
2.772
2.871
2.970
3.069
3.168
3.267
3.366
3.465
TYP
1.300
1.350
1.400
1.450
1.500
1.550
1.600
1.650
1.700
1.750
1.800
1.850
1.900
1.950
2.000
2.050
2.000
2.100
2.200
2.300
2.400
2.500
2.600
2.700
2.800
2.900
3.000
3.100
3.200
3.300
3.400
3.500
MAX
1.313
1.364
1.414
1.465
1.515
1.566
1.616
1.667
1.717
1.768
1.818
1.868
1.919
1.969
2.020
2.070
2.020
2.121
2.222
2.323
2.424
2.525
2.626
2.727
2.828
2.929
3.030
3.131
3.232
3.333
3.434
3.535
UNITS
V
© 2000 SEMTECH CORP.
5
652 MITCHELL ROAD NEWBURY PARK CA 91320
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet SC1153CSW.PDF ] | |
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