Sunday, January 04, 2015

Voltage Regulators LM7812 and LM317

The LM78XX series of three-terminal positive regulators is available in the TO-220 package and with several fixed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shut-down, and safe operating area protection.

Fairchild LM7812
Fairchild P/N LM7812

LM7812 


LM317

Adjustable power supply
"The LM117 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 1.5A over a 1.2V to 37V output range.
    3-Terminal Adjustable Regulator

    LM317 Variable Power Supply

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