! 3-termainal regulators ! output current up to 1.5 a ! no external components ! internal thermal overload protection ! high power dissipation capability ! internal shot-circuit current limiting ! output transistor safe-area compensation description this series of fixed-voltage monolithic integrated-circuit voltage regulators designed for a wide range of applications. these applications include on-card regulation for elimination of noise and distribution problems associated with single-point regulation. each of these regulators can deliver up to 1.5 amperes of output current. the internal current limiting and thermal shutdown features of these regulators make them essentially immune to overload. absolute maximum ratings over operating tenperature range (unless otherwise note ws7805 parameter unit input voltage, v i 3 5 v continuous total dissipation at 25 free-air temperature 2w lead temperature 1.6mm (1/16 inch) from case 10 seconds 260 storage temperature range, t stg -65 to 150 recommemded operating conditions min max unit input voltage, v i 7 output current, i o 1.5 a operating virtual junction temperature, t j 070 i c o (to-252) wing shing computer components co., (h.k.)ltd. tel:(852)2341 9276 fax:(852)2797 8153 homepage: http://www.wingshing.com e-mail: wsccltd@hkstar.com
ws7805 el e c tr i cal c h aracteri s tics at s p ecified v i rtu a l j u n c tion t e m p e r a t u r e, v i =10v, i o =500ma (u n l ess ot h e r w i s e not e d) ws7805 parameter test conditions min typ max unit 25 4.8 5 5.2 output voltage i o =5ma to1a, v i =7v to 20v, p Q 15w 0 to 70 4.75 5 5.25 v v i =7v to 25v 3 100 input regulation v i =8v to12v 25 15 0 ripple rejection v i =8v to18v f=120h z 0 to 70 62 78 db i o =5ma to 1.5a 15 100 output regulation i o =250ma to 750ma 25 550 mv output resistance f=1kh z 0 to 70 0.017 temperature coefficient of output voltage i o =5ma 0 to 70 -1.1 mv/ output noise voltage f=10h z to 100 khz 25 40 v dropout voltage i o =1a 25 2.0 v bias current 25 4.2 8 ma v i =7v to 25v 1.3 bias current change i o =5ma to 1a 0 to 70 0.5 short-circuit output current 25 750 peak output current 25 2.2 a
fig. 1. positive regulator pad location
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