View lm309 datasheet:

January 1995 LM109 LM309 5-Volt Regulator General Description The LM109 series are complete 5V regulators fabricated on far from the filter capacitor of the power supply Stability is a single silicon chip They are designed for local regulation also achieved by methods that provide very good rejection on digital logic cards eliminating the distribution problems of load or line transients as are usually seen with TTL logic association with single-point regulation The devices are Although designed primarily as a fixed-voltage regulator the available in two standard transistor packages In the solid- output of the LM109 series can be set to voltages above 5V kovar TO-5 header it can deliver output currents in excess as shown It is also possible to use the circuits as the con- of 2