Monday, October 22, 2018

7800 and 7900 Series Voltage Regulators

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.

7805 is popular for Embedded Systems and 7905 is sometimes used for the Dual Supply needs in such Microcontroller cards with Mixed Design sub-sections like A/D or Opamps.

7812 and 7912 are very popular in powering Traditional Opamp or communications circuits with a stable and reliable Dual Supply.

Power Supplies Section - Here you will find examples of 7824 and 7924 Power supplies.
Fairchild LM7812

In Instrumentation and Industrial Circuits where Size is not a problem and the current or power usage is less. A Mains transformer, bridge regulators, capacitors and these regulators are a time tested low noise and robust system.

SMPS does have EMI-RFI problems, hence use when small sizes are needed and high currents are required. In battery powered devices switching supplies are inevitable as they are power efficient.

MC7800 MC7900 1 Amp Voltage Regulators

These voltage regulators are monolithic integrated circuits designed as fixed−voltage regulators for a wide variety of applications including local, on−card regulation. These regulators employ internal current limiting, thermal shutdown, and safe−area compensation. 78 and 79 series voltage regulators are the most common in power supplies and easy to use.

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