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Power supply circuits are critical components in all electrical systems. They not only supply power but must also do so without degrading system performance with noise and/or sagging supply voltages, which is why the layout of the PCB is extremely important. Key power supply specifications like output voltage accuracy and power efficiency worsen when the layout of PCB is less then optimal, since the effects of parasitic PCB resistances and inductances are considerably high for high-current, fast-switching traces.

National Application Note AN-1077: Application Note 1077 Understanding the Power Supply Requirements of PCI Bus Standard-How to Protect the Digital Components

National Application Note AN-1118: Application Note 1118 Simple Regulator Provides ±12V from 5V Source

National Application Note AN-1149: Application Note 1149 Layout Guidelines for Switching Power Supplies

National Application Note AN-1192: Application Note 1192 Overture™ Series High Power Solutions

National Application Note AN-556: Application Note 556 Introduction to Power Supplies

National Application Note AB-30: Application Brief 30 RS-232 Line Driver Power Supply

National Application Note AN-24: A Simplified Test Set for Op Amp Characterization

Zetex Application Note AN27 ZR431 application note.

Zetex Application Note AN34 ZXSC100 power supply for digital still camera.