| LM309K comset semiconductors 1/2 voltage regulators general description the LM309K is complete 5v regulator fabricated on a single silicon chip. the available output current is greater than 1a. he is designed for local regulation on digital logic cards, eliminating the distribution problems associated with single-point regulation. the de vices are available in the to3 power package. the regulators are essentially blow-out proof. current limiting is included to limit the peak output current to a safe value. in addition, thermal shut down is provided to keep the ic from overheating. if internal dissipation becomes too great, the regulat or will shut down to prevent excessive heating. considerable effort was expended to make these devices easy to use and minimize the number of external components. it is not necessary to byp ass the output, although this does improve transient response somewhat. input bypassing is needed, however , if the regulator is located very far from the filter capacitor of the power supply. stability is al so achieved by methods that provide very good rejection of load or line transients as are usually seen with ttl logic. compliance to rohs. absolute maximum ratings input voltage 35v output current 1a power dissipation internally limited operating junction temperature range 0 to 125c storage temperature range -65 to 150c characteristics (1) parameter conditions min typ max unit output voltage t j = 25c 4.8 5.05 5.2 v line regulation t j = 25c 7v v in 25v - 4 50 mv load regulation t j =25c 5ma i out 1.5a - 50 100 mv output voltage 7v v in 25v 5ma i out i max p LM309K comset semiconductors 2/2 mechanical data case to-3 dimensions mm inches a 25,51 1,004 b 38,93 1,53 c 30,12 1,18 d 17,25 0,68 e 10,89 0,43 g 11,62 0,46 h 8,54 0,34 l 1,55 0,6 m 19,47 0,77 n 1 0,04 p 4,06 0,16 pin 1 : input pin 2 : output case : gnd
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