SC1150
SC1150 is PROGRAMMABLE DC/DC CONTROLLER manufactured by SEMTECH.
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 patible shutdown and on-board over voltage protection (OVP). The SC1150 operates at a fixed frequency of 200k Hz, providing an optimum promise between size, efficiency and cost in the intended application areas. The integrated D/A converter provides programmability of output voltage from 2.0V to 3.5V in 100m V increments with no external ponents. Both the range and the increment value may be changed by adding external ponents. The SC1150 provides an OVP output which can be used to trigger a crowbar circuit for true over voltage protection.
Features
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85% efficiency 4 bit DAC for output programmability On chip power good and OVP functions ® Meets Intel Pentium Pro VRM8.0 specifications
APPLICATIONS
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Pentium Pro Processor supplies ® Pentium Pro Processor VRM modules 2.0V to 3.5V microprocessor supplies Programmable power supplies
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ORDERING INFORMATION
DEVICE
(1)
PACKAGE SO-16
TEMP RANGE (TJ) 0
- 125°C
SC1150CS
Note: (1) Add suffix ‘TR’ for tape and reel.
BLOCK DIAGRAM
VCC CSm CSp SHUTDOWN 1.25V REF VCC 70m V CURRENT LIMIT BST +
ABSOLUTE MAXIMUM RATINGS
Parameter VCC to GND PGND to GND BST to GND
+ +
Symbol VIN
Maximum -0.3 to 7 ±1 -0.3 to 15
Units V V V °C °C °C
VID3 VID2 VID1 VID0 D/A 1.00V to 1.75V OSCILLATOR S R Q
LEVEL SHIFT AND...
