SC1150 Semtech Corporation, SC1150 Datasheet

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SC1150

Manufacturer Part Number
SC1150
Description
PROGRAMMABLE DC/DC CONTROLLER
Manufacturer
Semtech Corporation
Datasheet
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
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
PIN CONFIGURATION
© 1998 SEMTECH CORP.
VID3
VID2
VID1
VID0
VOSENSE
PWRGOOD
OVP
1.25V REF
VCC
D/A
1.00V to
1.75V
+
-
+
-
+
-
PWRGOOD
VCC
VCC
PGND
GND
CSm
GND
VCC
OVP
OSCILLATOR
CSp
DH
CSm
FB
70mV
CSp
+
-
ERROR
AMP
CURRENT LIMIT
-
+
1
2
3
4
5
6
7
8
®
-
+
R
S
Pro microprocessor,
Q
16
15
14
13
12
11
10
9
SHUTDOWN
VID0
VID1
VID2
VID3
FB
VOSENSE
SHUTDOWN
BST
B16997B
PROGRAMMABLE DC/DC
CONTROLLER
LEVEL SHIFT
AND DRIVE
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
BST
DH
PGND
Parameter
V
PGND to GND
BST to GND
Operating
Temperature Range
Storage
Temperature Range
Lead Temperature
(Soldering) 10 sec
FEATURES
APPLICATIONS
ORDERING INFORMATION
SC1150CS
Note:
(1) Add suffix ‘TR’ for tape and reel.
ABSOLUTE MAXIMUM RATINGS
CC
DEVICE
85% efficiency
4 bit DAC for output programmability
On chip power good and OVP functions
Meets Intel Pentium
Pentium
Pentium
2.0V to 3.5V microprocessor supplies
Programmable power supplies
to GND
652 MITCHELL ROAD NEWBURY PARK CA
(1)
®
®
Pro Processor supplies
Pro Processor VRM modules
Pentium is a registered trademark of Intel Corporation
PACKAGE
SO-16
Symbol
T
T
®
V
T
LEAD
STG
Pro VRM8.0 specifications
IN
A
-65 to +150
TEMP RANGE (T
Maximum
-0.3 to 15
-0.3 to 7
0 to 70
300
± 1
0 - 125°C
SC1150
Units
°C
°C
°C
V
V
V
J
)
1

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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 ...

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