SC1150

Manufacturer Part NumberSC1150
DescriptionPROGRAMMABLE DC/DC CONTROLLER
ManufacturerSemtech Corporation
SC1150 datasheet
 


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March 11, 1998
DESCRIPTION
The SC1150 voltage mode controller contains most of
the circuitry necessary to implement a DC/DC converter
®
for powering the Intel Pentium
Pro microprocessor,
both in single and multiple processor configurations.
The SC1150 features an integrated D/A converter,
pulse by pulse current limiting, integrated power good
signaling, logic compatible shutdown and on-board over
voltage protection (OVP).
The SC1150 operates at a fixed frequency of 200kHz,
providing an optimum compromise between size, effi-
ciency and cost in the intended application areas.
The integrated D/A converter provides programmability
of output voltage from 2.0V to 3.5V in 100mV incre-
ments with no external components. Both the range
and the increment value may be changed by adding ex-
ternal components.
The SC1150 provides an OVP output which can be
used to trigger a crowbar circuit for true over voltage
protection.
BLOCK DIAGRAM
VCC
CSm
CSp
CURRENT LIMIT
1.25V REF
VCC
-
70mV
+
VID3
VID2
R
D/A
VID1
Q
OSCILLATOR
1.00V to
VID0
1.75V
S
VOSENSE
-
+
+
+
-
-
ERROR
AMP
PWRGOOD
+
-
VCC
+
-
OVP
GND
FB
PIN CONFIGURATION
GND
1
16
VCC
2
15
OVP
3
14
PWRGOOD
4
13
CSm
5
12
CSp
6
11
PGND
7
10
DH
8
9
© 1998 SEMTECH CORP.
PROGRAMMABLE DC/DC
CONTROLLER
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
FEATURES
85% efficiency
4 bit DAC for output programmability
On chip power good and OVP functions
Meets Intel Pentium
APPLICATIONS
Pentium
Pentium
2.0V to 3.5V microprocessor supplies
Programmable power supplies
ORDERING INFORMATION
(1)
DEVICE
SC1150CS
Note:
(1) Add suffix ‘TR’ for tape and reel.
ABSOLUTE MAXIMUM RATINGS
Parameter
SHUTDOWN
BST
V
to GND
CC
LEVEL SHIFT
AND DRIVE
DH
PGND to GND
PGND
BST to GND
Operating
Temperature Range
Storage
B16997B
Temperature Range
Lead Temperature
(Soldering) 10 sec
VID0
VID1
VID2
VID3
FB
VOSENSE
SHUTDOWN
BST
652 MITCHELL ROAD NEWBURY PARK CA
SC1150
®
Pro VRM8.0 specifications
®
Pro Processor supplies
®
Pro Processor VRM modules
PACKAGE
TEMP RANGE (T
SO-16
0 - 125°C
Symbol
Maximum
V
-0.3 to 7
IN
± 1
-0.3 to 15
T
0 to 70
A
T
-65 to +150
STG
T
300
LEAD
Pentium is a registered trademark of Intel Corporation
)
J
Units
V
V
V
°C
°C
°C
1

SC1150 Summary of contents

  • Page 1

    ... Both the range and the increment value may be changed by adding ex- ternal components. The SC1150 provides an OVP output which can be used to trigger a crowbar circuit for true over voltage protection. BLOCK DIAGRAM VCC ...

  • Page 2

    ... All VID codes not specifically listed here are invalid and cause shutdown exactly as if the shutdown pin had been asserted. xxxx refers to any valid VID code. © 1998 SEMTECH CORP. PROGRAMMABLE DC/DC CONTROLLER = V ; 0mV < (CSp-CSm) < 60mV; T OSENSE O VID (1) 652 MITCHELL ROAD NEWBURY PARK CA SC1150 MIN TYP MAX UNITS 3210 1111 1.980 2.000 2.020 V 1110 2.079 2.100 2.121 1101 2 ...

  • Page 3

    ... VID0 16 Programming Input (LSB) NOTE: (1) All logic level inputs and outputs are open collector TTL compatible © 1998 SEMTECH CORP. PROGRAMMABLE DC/DC CONTROLLER >setpoint + 20% O within O PWRGOOD 652 MITCHELL ROAD NEWBURY PARK CA SC1150 GND 1 16 VID0 VCC 2 15 VID1 OVP 3 14 VID2 4 ...

  • Page 4

    ... Vendor Notes Various SANYO MV-GX or equiv. Low ESR PHOTRON 8 Turns 16AWG on MICROMETALS T50-52D core PHILIPS Logic level FET, 22m , 30V IRC OAR-1 Series Various Various Various SEMTECH 652 MITCHELL ROAD NEWBURY PARK CA SC1150 C10 5mOhm 1000uF 1000uF 1000uF VCCP + + + + + + ...

  • Page 5

    ... March 11, 1998 CHARACTERISTIC CURVES SC1150 Efficiency in Application circuit 16935E 100.0% 95.0% 90.0% 3.50V Set 85.0% 2.40V Set 80.0% 75.0% 70.0% 0.0 2.0 4.0 6.0 8.0 Output Current (Amps) Application circuit 16935E Transient Response, 3.1V, 0.3A to 10A Vo at Io=300mA steady state Vo at Io=10A steady state © 1998 SEMTECH CORP. PROGRAMMABLE DC/DC CONTROLLER Application circuit 16935E Ripple, 3.1V, 10A out 3 ...

  • Page 6

    ... March 11, 1998 OUTLINE DRAWING SO-16 LAND PATTERN SO-16 © 1998 SEMTECH CORP. PROGRAMMABLE DC/DC CONTROLLER 652 MITCHELL ROAD NEWBURY PARK CA SC1150 6 ...