lec13_basics_power_delivery

lec13_basics_power_delivery - Basics of Power Delivery Ref:...

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Basics of Power Delivery Basics of Power Delivery Ref: Fundamentals of Microsystems Packaging, Chapter 4 Class Notes Brian Young
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Basics of Power Delivery Circuits need voltage and current (power) to function This is supplied through the power delivery network in the PCB and Package Two important issues need to be addressed IR Voltage Drops and Inductive Effects Power Distribution Power Distribution
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Basics of Power Delivery What are the issues with Power What are the issues with Power Distribution ? Distribution ? o Almost all packages have problems with inductance o This inductance is part of the path that provides current to the switching circuits o Causes glitches on the voltage and ground lines o These glitches are coupled to the signals and can cause false switching
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Basics of Power Delivery V Effect of Power Supply Glitches Effect of Power Supply Glitches Ideal  CLK t P Data @ the Driver P t ToF t ToF t P t H t S V GND Clock – V GND Inductive Drop
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Basics of Power Delivery What Happens to a Circuit in the What Happens to a Circuit in the presence of Power Supply Noise ? presence of Power Supply Noise ? o Output may go to zero o Output may go to one o May take long time to make up its mind (metastability)
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Basics of Power Delivery Importance of Power Delivery Importance of Power Delivery Reliability Wall 50MHz Increase In FMAX +/- 100mV +/- 50mV 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80 825 785 745 705 665 625 FMAX (MHz) VCC (V) Courtesy: Intel (Resistive Drop) (Inductive Drop)
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Basics of Power Delivery Impact of Inductance in Power Delivery dt dI L V L =
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Basics of Power Delivery Transients on the Power Supply
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lec13_basics_power_delivery - Basics of Power Delivery Ref:...

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