Introduction
- Functions of a Power Distribution Network (PDN)
- Power delivery issues: Voltage fluctuations, timing errors
- Sources of power supply noise: Core and IO circuits
- Power distribution noise: Time and frequency domain
Power Distribution Network (PDN) Components
- DC-DC converter: Types, properties and model for PI analysis
- Bypass Capacitors: Characteristics, parasitics and models of various capacitor types
- Planes and traces: Low frequency model, high frequency response, resonances
PDN design procedure
- Target impedance, transient currents, chip and package effects, design from chip to DC-DC converter
Layout considerations
- Mounted inductance of capacitors, effect of traces, vias, planes
- Stackup selection, power plane location and separation
PDN impedance design
- Various methods, high frequency effects of capacitor location and plane size, determine value and amount of decoupling capacitors needed
- Interaction of power integrity, signal integrity and EMC
Simulation of a PDN
- Spreadsheets and SPICE simulation
- Advanced PI simulation: Pre- and post layout tool
PDN design example (exercise)
- Apply course knowledge in an exercise to design a PDN from beginning to end