LM340
Description
The
LM140/LM340A/LM340/LM78XXC monolithic
3-terminal positive voltage regulators employ internal current-limiting, thermal shutdown and safe-area pensa- tion, making them essentially indestructible. If adequate heat sinking is provided, they can deliver over 1.0A output cur- rent. They are intended as fixed voltage regulators in a wide range of applications including local (on-card) regulation for elimination of noise and distribution problems associated with single-point regulation. In addition to use as fixed volt- age regulators, these devices can be used with external ponents to obtain adjustable output voltages and cur- rents.
Considerable effort was expended to make the entire series of regulators easy to use and minimize the number of external ponents. It is not necessary to bypass the output, although this does improve transient response. Input bypassing is needed only if the regulator is located far from the filter capacitor of the power...
