1a adjustable/fixed low dropout linear regulator - lo w d r op out vo l t age - loa d reg u l a tio n: 0. 2% ty p i cal - optim ized f o r low v o l t age - on-chi p t h e r m a l li m iting - s t an dard so t - 223 an d t o -252 pac k a g es - thre e-term inal a d j u sta b l e or fixe d lo w dropo ut 1.2v ,1. 5 v , 1. 8 v , 2.5v , 2. 85v , 3. 3v , 5v . re gul at ors - active scsi term inators - high ef ficiency linear regulators - post re gul at ors for sw itc hi ng s u p p li es - bat t ery char gers - 12v to 5v l i n ear re gu lat o r s - m o th erbo ard cl ock su pp l i es the am s 1 1 1 7 - a d j and am s 1 1 1 7-1 . 2,-1 . 5 ,-1 . 8,-2 . 5 ,- 2 . 8 5 , - 3 . 3 a n d-5 are l o w dr o p o u t three- t e r m inal re g u l a tors w i th 1a ou tp ut cu rrent c a p a bi li t y . thes e dev i ces h a ve bee n opt im ized for low vol t age where tra n sie n t res p onse a n d m i nim u m input v o lt age ar e crit ic al. th e 2.8 5 v versi o n is desi gne d s p ec ifica lly t o b e used in acti v e t e rm inators for scsi bus. on-chi p t h er m a l li m itin g p r ovi des prot ec tio n a g a i nst an y com b inati on o f overl oa d a n d am bien t t e m p eratures th at w oul d crea te e x cessi ve j unc tio n t e m p eratures. u n lik e pn p ty pe re gul at ors w h ere u p t o 1 0 % of the o u t put current is was t ed as qui e sce n t curre nt, t h e quies c e n t cur - rent of the ams 1 1 1 7 flo w s i n to t h e l o a d , inc r eas i n g e f f i - cie n cy . the ams 1 1 17 series regul a t o rs are ava i l a ble in the indus- try - standar d so t - 223 an d t o -252 pow er pac k ag es. key features applications general description typical application notice: the distance between vout pin and capacito r should not exceed 4cm for excellent performance figure 1. typical applications of AMS1117
1a adjustable/fixed low dropout linear regulator pin assignments *with package soldered to 0.5 square inch copper ar ea over backside ground plane or internal power plane, -20 125
1a adjustable/fixed low dropout linear regulator typicals and limits appearing in normal type apply for t j =2 .limits appearing in boldface type apply over the entire junction temperature for operation, -20 to 125 electrical characteristic block diagram thermal limit current limit v out v in substrate gnd (fixed output) adj. (adjustable output) figure 3. block di a gram of ams111 7 symbol parameter conditions min note 2) typ note 1) max note 2) units v ref reference voltage AMS1117 1.5v<=(v in -v out )<=7v,10ma<=i out <=1a 1.225 1.250 1.275 v v out output voltage 10ma<= i out <=1a i out = 10ma, v in = 3.2v AMS1117-1.2 ,2.7v<= v in <=8.2v 1.176 1.152 1.200 1.200 1.224 1.248 v AMS1117-1.5 ,3.0v<= v in <=8.5v 1.470 1.500 1.530 v AMS1117-1.8 ,3.3v<= v in <=8.8v 1.764 1.800 1.836 v AMS1117-2.5 ,4v<= v in <= 9.5v 2.450 2.500 2.550 v AMS1117-2.85 , 4.35v <= v in <= 9.85v 2.793 2.850 2.907 v AMS1117-3.3 , 4.8v<= v in <=10.3v 3.234 3.300 3.366 v AMS1117-5.0,6.5v<=v in <= 12v 4.900 5.000 5.100 v
1a adjustable/fixed low dropout linear regulator typicals and limits appearing in normal type apply for t j =2 .limits appearing in boldface type apply over the entire junction temperature for operation, -20 to 125 electrical characteristic (continued) symbol parameter conditions min note 2) typ note 1) max note 2) units ? v out line regultion note 3) i out =10ma ,(v out +1.5v)<=v in <=12v 0.035 0.2 load regultion note 3) v in -v out =2v,10ma<= i out <=1a, 0.2 0.7 AMS1117-1.2 v in -v out =2v,10ma<= i out <=1a, 0.2 1 v in -v out dropout volage i out =1a, ? v ref =1% 1.100 1.250 v i limit current limit v in -v out = 2v, t j =25 1.1 1.5 a minimum load current note 4) AMS1117-adj 1.5v<=(v in -v out )<=10v 10 ma quiescent curent v in =v out +1.25v 5 13 ma thermal regulation t a = 25c, 30ms pulse 0.01 0.1 w ripple rejection f=120hz,v in -v out =3v, v ripple =1v pp 60 72 db adjust pin current 50 120 a adjust pin current change 1.5v<=v in -v out <=7v, 10ma<=i out <=1a 0.2 5 a temperature stability 0.5 long term stability t a = 125c, 1000hrs. 0.3
1a adjustable/fixed low dropout linear regulator note 1: typical values represent the most likely parametric norm. note 2: all limits are guaranteed by testing or statistical analysis. note 3: load and line regulation are measured at constant junction room temperature. note 4: the minimum output current requi red to maintain regulation. typical performance characteristics typicals and limits appearing in normal type apply for t j =2 .limits appearing in boldface type apply over the entire junction temperature for operation, -20 to 125 electrical characteristic (continued) symbol parameter conditions min note 2) typ note 1) max note 2) units i limit rms output noise(% of v out ) t a = 25c, 10hz<= f <=10khz 0.003 thermal resistance, junction to case sot-223 15 /w to-252 3 w thermal shutdown junction temperature 155 thermal shutdown hysteresis 25 output current ( a ) 0 0.2 0.4 0.6 0.8 1.0 1.5 1.4 1.3 1.2 1.0 0.9 0.8 0.7 0.6 0.5 0 dropout voltage ( v ) figure 4. dropout voltage vs. o utput c urrent
1a adjustable/fixed low dropout linear regulator typical performance characteristics (continued) figure 6. output vol tage vs. temperature output voltage( v ) 3.70 3.65 3.60 3.55 3.50 3.45 3.40 3.35 3.30 3.25 3.20 junction temperature ( ) -75 ?50 ?25 0 25 50 75 100 125 150 175 figure 5. ref erence volt age vs. temperature referencevoltage( v ) 0.260 1.255 1.250 1.245 1.240 1.235 1.225 1.220 1.215 1.210 junction temperature ( ) -75 ?50 ?25 0 25 50 75 100 125 150 175 figure 7. minimum load current vs. temperature minimum load current( ma ) 5 4 3 2 1 0 junction temperature ( ) -75 ?50 ?25 0 25 50 75 100 125 150 175 figure 8. adj pin c urrent vs. tem perature adj pin current( 100 90 80 70 60 50 40 30 20 10 0 junction temperature ( ) -75 ?50 ?25 0 25 50 75 100 125 150 175 note: AMS1117 only
1a adjustable/fixed low dropout linear regulator mechanical dimensions 4-lead sot-223 package symbol inches millimeters notes min. max. min. max. a ? 071 ? 1.80 a1 ? 181 ? 4.80 b 025 033 064 840 c ? 0.90 ? 2.29 d 248 264 6.30 6.71 e 130 148 3.30 3.71 e 115 124 2.95 3.15 f 033 041 840 1.04 h 264 287 6.71 7.29 i 0121 ? 310 ? j ? 10 ? 10 k 10 16 10 16 l 0008 0040 0203 1018 m 10 16 10 16 n 010 014 250 360 figure 9. 4-lead sot-223 package
1a adjustable/fixed low dropout linear regulator mechanical dimensions (continued) 3-lead to-252 package notes: 1. dimensions are exclusive of mold flash, metal burrs or interlead protrusion. 2. stand off-height is measured from lead tip with ref. to datum ?b-. 3. foot length is measured with ref. to datum ?a? with lead surface. 4. thermal pad contour optional within dimension b3 and l3. 5. formed leads to be planar with respect to one another at seating place ?c-. 6. dimensions and tolerances. symbol inches millimeters notes min. max. min. max. a 086 094 2.19 2.39 b 025 035 0.64 0.89 b2 030 045 0.76 1.14 b3 205 215 5.12 5.46 4 c 018 024 0.46 0.61 c2 018 023 0.46 0.58 d 210 245 5.33 6.22 1 e 250 265 6.35 6.73 1 e 090 bsc 2.29 bsc h 370 410 9.40 10.41 l 055 070 1.40 1.78 3 l1 108 ref 2.74 ref l3 035 080 0.89 2.03 4 l4 025 040 0.64 1.02 figure 10. 3-lead to-252 package
1a adjustable/fixed low dropout linear regulator advanced monolithic systems http://www.ams-semitech.com the " " logo is a re g i ste r ed t r a d emark of advanced monolithic systems. all other company and product names are trademarks of their respective owners ordering information package temperature range part number output voltage packing marking transport media sot 223 -20 - +125 AMS1117-1.2 1.2v ams 1117 1.2 2.5 k tape and reel -20 - +125 AMS1117-1.5 1.5v ams 1117 1.5 2.5 k tape and reel -20 - +125 ams 1117-1.8 1.8v ams 1117 1.8 2.5k tape and reel -20 - +125 AMS1117-2.5 2.5v ams 1117 2.5 2.5 k tape and reel -20 - +125 AMS1117-2.85 2.85v AMS1117 2.8 2.5 k tape and reel -20 - +125 AMS1117-3.3 3.3v ams 1117 3.3 2.5k tape and reel -20 - +125 AMS1117-5 5v AMS1117 5 2.5k tape and reel -20 - +125 AMS1117 adjust ams 1117 2.5 k tape and reel to 252 -20 - +125 AMS1117 -1.2 1.2v AMS1117 1.2 2.5k tape and reel -20 - +125 AMS1117 -1.5 1.5v AMS1117 1.5 2.5k tape and reel -20 - +125 AMS1117 -1.8 1.8v AMS1117 1.8 2.5k tape and reel -20 - +125 AMS1117 -2.5 2.5v AMS1117 2.5 2.5k tape and reel -20 - +125 AMS1117 -2.85 2.85v AMS1117 2.8 2.5k tape and reel -20 - +125 AMS1117-3.3 3.3v AMS1117 3.3 2.5k tape and reel -20 - +125 ams 1117-5 5.0v AMS1117 5 2.5k tape and reel -20 - +125 AMS1117cd adjust AMS1117cd 2.5k tape and reel disclaimer: ? ams reserves the rig ht t o make ch an g es t o the inf ormation herei n f or the improvement of the design and performance without further notice! customers should obtain the latest relevant information before placing orders and should verify that such information is complete and current. ? all semiconductor prod uc t s malf u nction or f ail wi th som e probability under special conditio ns . when using ams prod uc t s in system design or complete machine manufacturing, it is the responsibility of the buyer to comply with the safety standards strictly and take essenti al measures to avoid situation s in which a malf unction or failure of such ams products could cause loss of body injury or damage to property. ? ams will supply the be s t po ss i ble product for cu s tomers!
|
