Product Details

The LM78XX series of three terminal regulators is available with several fixed output voltages making them useful in a wide range of applications. One of these is local on cardregulation, eliminating the distribution problems associated with single point regulation. The voltages available allowthese regulators to be used in logic systems, instrumenta-tion, HiFi, and other solid state electronic equipment. Al-though designed primarily as fixed voltage regulators these devices can be used with external components to obtain ad-justable voltages and currents.

The LM78XX series is available in an aluminum TO-3 pack-age which will allow over 1.0A load current if adequate heat sinking is provided. Current limiting is included to limit the peak output current to a safe value. Safe area protection for the output transistor is provided to limit internal power dissipation. lf internal power dissipation becomes too high for the heat sinking provided, the thermal shutdown circuit take sover preventing the lC from overheating.

Considerable effort was expanded to make the LM78XX series of regulators easy to use and minimize the number of external components.lt is not necessary to bypass the output, although this does improve transient response. Input by-passing is needed only if the regulator is located far from the filter capacitor of the power supply.For output voltage other than 5V, 12V and 15V the LM117 series provides an output voltage range from 1.2V to 57V. 

Products Features

• Output curent in excess of 1A

• Internal thermal overload protection

• No external components required

• Output transistor safe area protection

• Internal short circuit curent limit

• ​Available in the aluminum TO-3 package

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