sc1155csw.tr Semtech Corporation, sc1155csw.tr Datasheet
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sc1155csw.tr
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sc1155csw.tr Summary of contents
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... APPLICATIONS = Server Systems and Workstations = Intel Pentium = AMD Athlon = Multiple Microprocessor Supplies = Voltage Regulator Modules ORDERING INFORMATION (1) DEVICE SC1155CSW.TR SC1155EVB Note: (1) Only available in tape and reel packaging. A reel contains 1000 devices. 28 PWRGD PWRGD R9 27 10k VID0 +5V 26 VID1 R10 ...
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PRELIMINARY - August 7, 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 - August 7, 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 - August 7, 2000 ELECTRICAL CHARACTERISTICS Unless specified: 0 < T < 125°C, VIN = 12V J PARAMETER SYMBO Supply Voltage Range VIN12V Supply Current (Quiescent) I High Side Driver Supply I BOOT Current (Quiescent) REFERENCE/VOLTAGE IDENTIFICATION Reference Voltage ...
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PRELIMINARY - August 7, 2000 ELECTRICAL CHARACTERISTICS (cont.) Unless specified: 0 < T < 125°C, VIN = 12V J PARAMETER HYSTERETIC COMPARATOR Input Offset Voltage Input Bias Current Hysteresis Accuracy Hysteresis Setting DROOP COMPENSATION Initial Accuracy OVERCURRENT PROTECTION OCP Trip ...
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PRELIMINARY - August 7, 2000 ELECTRICAL CHARACTERISTICS (cont.) Unless specified: 0 < T < 125°C, VIN12V = 12V J PARAMETER SYMBOL DRIVE REGULATOR DRV Voltage V Load Regulation Vldreg Short Circuit Current Ishort HIGH-SIDE OUTPUT DRIVER Peak Output Current Isrc ...
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PRELIMINARY - August 7, 2000 DYNAMIC ELECTRICAL CHARACTERISTICS Unless specified: 0 < T 125°C, VIN12V = 12V J < PARAMETER SYMBOL (1) HYSTERETIC COMPARATORS Propagation Delay Time t HCPROP from VSENSE to HIGHDR or LOWDR (excluding deadtime) (2) OUTPUT DRIVERS ...
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PRELIMINARY - August 7, 2000 DYNAMIC ELECTRICAL CHARACTERISTICS (cont.) Unless specified: 0 < T < 125° C, VIN12V = 12V J PARAMETER SYMBOL HIGH-SIDE Vds SENSING (Cont.) (1) POWER GOOD Comparator Propagation t Delay (1) SOFTSTART Comparator Propagation Delay (2) ...
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PRELIMINARY - August 7, 2000 TYPICAL PERFORMANCE CURVES 5V Efficiency 95% 93% 91% 89% 87% 85% 83% 81% 79% 77% 75 Regulation -1% -2% - © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS ...
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PRELIMINARY - August 7, 2000 TYPICAL PERFORMANCE CURVES (Cont.) 12V Efficiency 95% 93% 91% 89% 87% 85% 83% 81% 79% 77% 75 12V Regulation -1% -2% - © 2000 SEMTECH CORP. PROGRAMMABLE ...
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PRELIMINARY - August 7, 2000 BLOCK DIAGRAM © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE SC1155 11 ...
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PRELIMINARY - August 7, 2000 OUTPUT VOLTAGE TABLE 0 = VSS OPEN VID4 VID3 ...
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PRELIMINARY - August 7, 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 - August 7, 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 - August 7, 2000 APPLICATION CIRCUIT © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE SC1155 15 ...
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PRELIMINARY - August 7, 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 - August 7, 2000 EVALUATION BOARD ARTWORK © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE TOP LAYER BOTTOM LAYER SC1155 17 ...
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PRELIMINARY - August 7, 2000 EVALUATION BOARD LAYOUT © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE TOP VIEW BOTTOM VIEW SC1155 18 ...
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PRELIMINARY - August 7, 2000 OUTLINE - SO-28 ECN00-1229 © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE SC1155 19 ...