SC1151 DESCRIPTION SC1151 voltage mode controller contains m

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SC1151 DESCRIPTION SC1151 voltage mode controller contains m

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PROGRAMMABLE DC/DC CONTROLLER ADVANCED MICROPROCESSORS
SC1151
DESCRIPTION
SC1151 voltage mode controller contains most circuitry necessary implement DC/DC converter powering advanced microprocessors such Klamath, both single multiple processor configurations. SC1151 features integrated converter, pulse pulse current limiting, integrated power good signaling, logic compatible shutdown on-board over voltage protection (OVP). SC1151 operates fixed frequency 200kHz, providing optimum compromise between size, efficiency cost intended application areas. integrated converter provides programmability output voltage from 2.0V 3.5V 100mV increments 1.80V 2.05V 50mV increments with external components. SC1151 provides output which used trigger crowbar circuit true over voltage protection.
FEATURES
efficiency output programmability chip power good functions Designed Intel Klamath VRM8.1 requirements
APPLICATIONS
Klamath microprocessor supplies Klamath modules 1.8V 3.5V microprocessor supplies Programmable power supplies
ORDERING INFORMATION
DEVICE
PACKAGE SO-16
TEMP RANGE (TJ) 125°C
SC1151CS
Note: suffix `TR' tape reel.
BLOCK DIAGRAM
SHUTDOWN
ABSOLUTE MAXIMUM RATINGS
Parameter Symbol Maximum -0.3 -0.3 TSTG TLEAD +150 Units
1.25V
70mV
CURRENT LIMIT
PGND
VID4 VID3 VID2 VID1 VID0
SHUTDOWN LOGIC
DECODED SHUTDOWN SIGNAL LEVEL SHIFT DRIVE OSCILLATOR PGND
VOSENSE
PWRGOOD ERROR
A17043A
Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering)
CONFIGURATION
PWRGOOD PGND VID0 VID1 VID2 VID3 VID4 VOSENSE SHUTDOWN
Pentium registered trademark Intel Corporation
1998 SEMTECH CORP.
MITCHELL ROAD NEWBURY PARK
PROGRAMMABLE DC/DC CONTROLLER ADVANCED MICROPROCESSORS
SC1151
ELECTRICAL CHARACTERISTICS
Unless specified: 4.75V 5.25V; PGND VOSENSE (CSp-CSm) 60mV; 25oC PARAMETER Output Voltage(2) CONDITIONS Application circuit 16935F 43210 UNITS
00101 1.782 1.800 1.818 00100 1.832 1.850 1.868 00011 1.881 1.900 1.919 00010 1.931 1.950 1.969 00001 1.980 2.000 2.020 00000 2.030 2.050 2.070 11111 1.980 2.000 2.020 11110 2.079 2.100 2.121 11101 2.178 2.200 2.222 11100 2.277 2.300 2.323 11011 2.376 2.400 2.424 11010 2.475 2.500 2.525 11001 2.574 2.600 2.626 11000 2.673 2.700 2.727 10111 2.772 2.800 2.828 10110 2.871 2.900 2.929 10101 2.970 3.000 3.030 10100 3.069 3.100 3.131 10011 3.168 3.200 3.232 10010 3.267 3.300 3.333 10001 3.366 3.400 3.434 10000 3.465 3.500 3.535
Load Regulation Line Regulation Lockout Current Limit Voltage Oscillator Frequency Oscillator Duty Cycle Sink/Source Current Output Voltage Tempco
0.3A
xxxxx xxxxx xxxxx xxxxx xxxxx xxxxx
ppm/oC
4.5V, PGND
xxxxx xxxxx
NOTES: output currents, below continuous conduction threshold will cause increase output voltage beyond load regulation limit. Application circuit 16935F regulation curve sheet codes specifically listed here invalid cause shutdown exactly shutdown been asserted. xxxxx refers valid code.
1998 SEMTECH CORP. MITCHELL ROAD NEWBURY PARK
PROGRAMMABLE DC/DC CONTROLLER ADVANCED MICROPROCESSORS
SC1151
DESCRIPTION
Name
PWRGOOD
Function Small Signal Analog Digital Ground Chip Supply Voltage High Signal VO>setpoint Open collector logic output, high within setpoint Current Sense Input (negative) Current Sense Input (positive) Power Ground High Side Driver Output High Side Driver
PWRGOOD VID0 VID1 VID2 VID3 VID4 VOSENSE SHUTDOWN
PGND SHUTDOWN VOSENSE VID4 VID3 VID2 VID1 VID0
PGND
Logic shuts down converter internal feedback chain Programming Input (MSB) Programming Input Programming Input Programming Input Programming Input (LSB)
NOTE: logic level inputs outputs open collector compatible
1998 SEMTECH CORP. MITCHELL ROAD NEWBURY PARK
PROGRAMMABLE DC/DC CONTROLLER ADVANCED MICROPROCESSORS
SC1151
APPLICATION CIRCUIT
BUK556 5mOhm 1000uF 1000uF 1000uF VCCP
1000uF 0.1uF 1000uF 1000uF PSR16C30CT
1000uF
1000uF
1000uF
0.1uF
2.32k
1.00k
VID0 VID1 VID2 VID3 VID4 SHUTDOWN PWRGD SC1151CS VID0 VID1 VID2 VID3 SHUTDOWN VOSENSE PWRGOOD VID4 PGND
0.1uF
16935F
0.1uF
MATERIALS LIST
Quantity Reference Part/Description Vendor Various SANYO PHOTRON Turns 16AWG MICROMETALS T50-52D core PHILIPS Various Logic level FET, 22m, OAR-1 Series MV-GX equiv. Notes C1,C11-C13 0.1µF Ceramic C2-C10 1000µF/6.3V PSR16C30CT BUK556 10k, 1/8W
2.32k, 1/8W Various 1/8W 1/8W SC1151CS Various Various SEMTECH
1998 SEMTECH CORP. MITCHELL ROAD NEWBURY PARK
PROGRAMMABLE DC/DC CONTROLLER ADVANCED MICROPROCESSORS
SC1151
CHARACTERISTIC CURVES
SC1151 Efficiency Application circuit 16935F
100.0%
Application circuit 16935F Ripple, 3.1V,
95.0%
90.0%
3.50V
Efficiency
3.00V 85.0% 2.40V
80.0%
2.00V
75.0%
70.0% 10.0 12.0
14.0
Output Current (Amps)
Application circuit 16935F Transient Response, 3.1V, 0.3A
SC1151 Regulation Application circuit 16935F
0.050
Io=300mA steady state
Voltage change normalized Io=2A
0.040
0.030
0.020
0.010
0.000
Io=10A steady state
-0.010
Steady state voltage levels superimposed reference.
-0.020 10.0 12.0 14.0
Output Current (Amps)
1998 SEMTECH CORP. MITCHELL ROAD NEWBURY PARK
PROGRAMMABLE DC/DC CONTROLLER ADVANCED MICROPROCESSORS
SC1151
OUTLINE DRAWING SO-16
LAND PATTERN SO-16
1998 SEMTECH CORP. MITCHELL ROAD NEWBURY PARK

SC1151 DESCRIPTION SC1151 voltage mode controller contains m

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