SC1154CSW Semtech Corporation, SC1154CSW Datasheet
SC1154CSW
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SC1154CSW Summary of contents
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... APPLICATIONS Server Systems and Workstations Pentium Multiple Microprocessor Supplies Voltage Regulator Modules ORDERING INFORMATION (1) DEVICE SC1154CSW Note: (1) Add suffix ‘TR’ for tape and reel. SIMPLIFIED BLOCK DIAGRAM 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 ® II Core Supply PACKAGE TEMP ...
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PRELIMINARY - March 1, 2000 ABSOLUTE MAXIMUM RATINGS Parameter VIN12V BOOT to DRVGND BOOT to BOOTLO Digital Inputs AGND to DRVGND LOHIB to AGND LOSENSE to AGND IOUTLO to AGND HISENSE to AGND VSENSE to AGND Continuous Power Dissipation, T ...
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PRELIMINARY - March 1, 2000 PIN DESCRIPTION Pin Pin Name Pin Function 1 IOUT Current Out. The output voltage on this pin is proportional to the load current as measured across the high side MOSFET, and is approximately equal to ...
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PRELIMINARY - March 1, 2000 ELECTRICAL CHARACTERISTICS Unless specified: 0 < T < 125°C, VIN = 12V J PARAMETER SYMBOL Supply Voltage Range VIN12V Supply Current (Quiescent) High Side Driver Supply I BOOT Current (Quiescent) REFERENCE/VOLTAGE IDENTIFICATION Reference Voltage Accuracy ...
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PRELIMINARY - March 1, 2000 ELECTRICAL CHARACTERISTICS (cont.) Unless specified: 0 < T < 125°C, VIN = 12V J PARAMETER SYMBOL SOFT START Charge Current Discharge Current INHIBIT COMPARATOR Start Threshold Vstart VIN12V UVLO Start Threshold Vstart Hysteresis Vhys HYSTERETIC ...
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PRELIMINARY - March 1, 2000 ELECTRICAL CHARACTERISTICS (cont.) Unless specified: 0 < T < 125°C, VIN12V = 12V J PARAMETER SYMBOL HIGH-SIDE VDS SENSING (cont.) LOSENSE High Level Input Vih Voltage LOSENSE Low Level Input Vil Voltage Sample/Hold Resistance BUFFERED ...
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PRELIMINARY - March 1, 2000 ELECTRICAL CHARACTERISTICS (cont.) Unless specified: 0 < T 125°C, VIN12V = 12V J < PARAMETER SYMBOL HIGH-SIDE OUTPUT DRIVER (cont.) Output Resistance Rsrc Rsink LOW-SIDE OUTPUT DRIVER Peak Outout Current Isrc Isink Output Resistance Rsrc ...
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PRELIMINARY - March 1, 2000 ELECTRICAL CHARACTERISTICS (cont.) Unless specified: 0 < T < 125° C, VIN12V = 12V J PARAMETER SYMBOL (1) HIGH-SIDE Vds SENSING Response Time t VDSRESP Short Circuit Protection t Rising Edge Delay Sample/Hold Switch turn- ...
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PRELIMINARY - March 1, 2000 BLOCK DIAGRAM © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER FOR ADVANCED PROCESSORS 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 9 ...
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PRELIMINARY - March 1, 2000 OUTPUT VOLTAGE TABLE 0 = GND Floating or +5V pull-up VID4 VID3 ...
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PRELIMINARY - March 1, 2000 FUNCTIONAL DESCRIPTION Reference/Voltage Identification The reference/voltage identification (VID) section con- sists of a temperature compensated bandgap refer- ence and a 5-bit voltage selection network. The 5 VID pins are TTL compatable inputs to the VID ...
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PRELIMINARY - March 1, 2000 FUNCTIONAL DESCRIPTION (cont.) resistor divider, and connected to the DROOP pin. Thus, under loaded conditions, VOUT is regulated to Vout = Vref • (1+R7/R8) - IOUT • R2/(R1+R2). Inhibit The inhibit pin is a TTL ...
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PRELIMINARY - March 1, 2000 APPLICATION CIRCUIT © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER FOR ADVANCED PROCESSORS 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 13 ...
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PRELIMINARY - March 1, 2000 MATERIALS LIST Quantity Reference C1-C4, C8, C11 3 C17-C19 7 C6,C7,C9,C12,C16,C20, C27 2 C13,C14 6 C21-C26 2 C10,C15 RA, ...
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PRELIMINARY - March 1, 2000 EVALUATION BOARD ARTWORK © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER FOR ADVANCED PROCESSORS TOP LAYER BOTTOM LAYER 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 15 ...
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PRELIMINARY - March 1, 2000 EVALUATION BOARD LAYOUT © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER FOR ADVANCED PROCESSORS TOP VIEW BOTTOM VIEW 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 16 ...
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PRELIMINARY - March 1, 2000 TEST DATA 100.0 95.0 90.0 85.0 % 80.0 75.0 70.0 65.0 60.0 0 5.00 4.00 3.00 2.00 1.00 % 0.00 0 -1.00 -2.00 -3.00 -4.00 -5.00 © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER ...
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PRELIMINARY - March 1, 2000 OUTLINE - SO-28 ECN00-904 © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER FOR ADVANCED PROCESSORS 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 18 ...