sot ? 89-3l 1. adj/gnd 2. output 3.in 1a low dropout linear regulator general description the cja1117b-xxx is a series of low dropout three-terminal regulat ors with a dropout of 1.15v ( typ. ) at 1a output current. the cja1117b-xxx series provides current limit ing and thermal shutdown. its circuit includes a trimmed bandgap. reference to assure output voltage accu racy to be within 1 .5 %. current limit is trimmed to ensure specified. out put current and controlled short-circui t current. on-chip thermal shutdown provides protection against any combination of over load and ambient temperature that would create excessive junction temperature. the cja1117b-xxx has an adjustable ve rsion, that can provi de the output voltage from 1.25v to 5v with only 2 external resistors. features z low dropout voltage: 1.15v (typ.) at 1a output current z trimmed current limit z on-chip thermal shutdown z three-terminal adjustable or fixed 1.8v, 2.5v, 3.3v, 5v z operation junction temperature: 0 to 125 applications z pc motherboard z lcd monitor z graphic card z dvd-video player z nic/switch z telecom modem z adsl modem z printer and o ther p eripheral equipment package and pin configurations 1 of 4 sales@zpsemi.com www.zpsemi.com cja1117b-xxx c,sep,2013
ordering information package operating junction temperature range part no. cja1117b-adj cja1117b-1.8 cja1117b-2.5 cja1117b-3.3 sot-89-3l 0 to 125 cja1117b-5.0 aboslute maximum ratings (t a =25 unless otherwise noted) note: stresses greater than t hose listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stre ss ratings only, and functional of t he device at these or any other conditions beyond those i ndicated under ?recommended operating co nditions? is not implied. exposure to ?absolute maximum rati ngs? for extended periods may affect device reliability. recommended operating conditions parameter symbol value unit input voltage v i 20 v maximum junction temperature t j 150 storage temperature t stg - 55 ~+150 lead temperature (soldering, 10sec.) t l 260 esd voltage (machine model) v esd 400 v parameter symbol value unit input voltage v i 15 v operating junction temperature t j 0~+125 thermal resistance from junction to ambient r ja 250 /w 2 of 4 sales@zpsemi.com www.zpsemi.com cja1117b-xxx c,sep,2013
electrical characteristics (v in 10v, t j =25 unless otherwise specified. ) parameter symbol part no. test conditions min typ max unit i out =10ma, v in -v out = 3.23 1.231 1.250 1.269 reference voltage v iroc cja1117b-adj 10ma i ou t 1a, 2 .75 v v in -v out 1 3.25 v 1.225 1.250 1.275 v i out =10ma, v in =3.8v 1.773 1.8 1.827 cja1117b-1.8 10ma i out 1a, 3.3v v in 12v 1.764 1.8 1.836 v i out =10ma, v in =4.5v 2.463 2.5 2.538 cja1117b-2.5 10ma i out 1a, 4v v in 12v 2.450 2.5 2.550 v i out =10ma, v in =5.3v 3.251 3.3 3.350 cja1117b-3.3 10ma i out 1a, 4.8v v in 12v 3.234 3.3 3.366 v i out =10ma, v in =7.0v 4.925 5.0 5.075 output voltage v o cja1117b-5.0 10ma i out 1a, 6.5v v in 12v 4.9 5.0 5.1 v cja1117b-adj i out =10ma, 1.5v v in -v out 12v 0.035 0.2 % cja1117b-1.8 i out =10ma, 1.5v v in -v out 10.2v 1 7 cja1117b-2.5 i out =10ma, 1.5v v in -v out 9.5v 1 7 cja1117b-3.3 i out =10ma, 1.5v v in -v out 8.7v 1 7 line regulation lnr cja1117b-5.0 i out =10ma, 1.5v v in -v out 7v 1 10 mv cja1117b-adj 0.2 0.4 % cja1117b-1.8 7.2 cja1117b-2.5 10 cja1117b-3.3 13.2 load regulation ldr cja1117b-5.0 vi n -v out = 1.5 v, 10ma i out 1a 20 mv dropout voltage v d v ref =1%, i out =1.0a 1.3 v current limit i limit v in -v out =2v 1 a adjust pin current 60 120 a minimum load current i l 1.5v v in -v out 12v (adj only) 1.7 5 a quiescent current i q v in = v out +1.25v (adj except) 5 10 ma ripple rejection rr f=120hz,c out =22 ftantalum, v in -v out =3v, i out =1a 60 75 db temperature stability 0.5 % long-term stability t a =125 , 1000hrs 0.3 % rms output noise (% of vout) t a =25 , 10hz f 10khz 0.003 % thermal shutdown hysteresis 25 * with package soldering to copper area over backside ground plane or internal power plane r ja can vary from 46 /w to >90 /w depending on mounting technique and the size of the copper area 3 of 4 sales@zpsemi.com www.zpsemi.com cja1117b-xxx c,sep,2013
functional block diagram typical application circuit 4 of 4 sales@zpsemi.com www.zpsemi.com cja1117b-xxx c,sep,2013
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