Fairchild RC5050, RC5051 specifications Life Support Policy

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AN50

APPLICATION NOTE

 

 

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:

1.Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonable expected to result in a significant injury of the user.

2.A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.

Fairchild Semiconductor

Fairchild Semiconductor

Fairchild Semiconductor

National Semiconductor

Corporation

Europe

 

 

 

 

Hong Kong Ltd.

Japan Ltd.

 

 

 

 

 

Americas

 

Fax:

+49

(0)

1 80-530 85 86

13th Floor, Straight Block,

Tel:81-3-5620-6175

 

 

Customer Response Center

Email:

europe.support@nsc.com

Ocean Center, 5 Canto Rd.

Fax:81-3-5620-6179

 

Tel:1-888-522-5372

Deutsch

Tel:

+49

(0)

8 141-35-0

Tsimshatsui, Kowloon

 

 

 

 

English

Tel:

+44

(0)

1 793-85-68-56

Hong Kong

 

 

Italy

Tel:

+39

(0)

2 57 5631

Tel:+852 2737-7200

 

 

 

 

 

 

 

Fax:+852 2314-0061

 

www.fairchildsemi.com

2/98 0.0m Stock#AN30000050 1998 Fairchild Semiconductor Corporation

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Contents Intel Pentium Pro Processor Power Requirements IntroductionOutput Ripple and Noise EfficiencyProcessor Voltage Identification Output Voltage Programming CodesRC5050 and RC5051 Description Power Good Pwrgd Output Enable OutenUpgrade Present UP# Internal Voltage ReferenceDesign Considerations and Component Selection Short Circuit ProtectionOscillator RC5051 Mosfet Selection Cosiderations Mosfet Selection TableLess heat sink required Converter Efficiency Calculation of Converter Efficiency Under Heavy LoadsSelecting the Inductor Implementing Short Circuit ProtectionRC5050 Short Circuit Comparator Threshold Voltage Short Circuit ComparatorComparison of Sense Resistors Rsense for Various Load CurrentsSummary PC Trace Resistor Tolerance 16%Total Tolerance for PC Trace Resistor RC5050 and RC5051 Short Circuit Current Characteristics For each MosfetSchottky Diode Selection Schottky Diode Selection TableOutput Filter Capacitors ManufacturerInput Filter Bill of MaterialBill of Materials for a 13A Pentium Pro Klamath Application PCB Layout Guidelines and Considerations PCB Layout GuidelinesERJ-6GEY050Y ERJ-6ENF10.0KYExample of a PC Motherboard Layout and Gerber File Procedures Guidelines for Debugging and Performance EvaluationsDebugging Your First Design Implementation Performance Evaluation11010 505 504 501 496 493 492 491 490 989488 486Case Temperature Evaluation SummaryIload = 13.9A Device DescriptionApplication Note Summary RC5050 Evaluation BoardAppendix a Directory of Component SuppliersLife Support Policy