1 elm 1085 d g bipolar 3 a ldo v oltage regulato r 3 - parameter symbol limit unit power supply voltage vcc 7 v power dissipation pd internally limited w thermal resistance junction to case r j c 5 c /w thermal resistance junction to ambient r j a 70 c /w operating junction temperature top 0 to + 125 c storage temperature tstg - 40 to + 150 c lead temp erature (soldering 10s.) t l ead 260 c elm 1085 d g is positive and bipolar ldo three terminal voltage regulator with 3a output current capability. this series includes ther mal shutdown protection and short circuit current limiter. elm 1085 series is only available in adjustable version . ? output voltage range ( adj. ) : 1.27v to 5.55v ? line regulation : typ. 0.5 % ? load regulat ion : typ. 0.5 % ? l d o voltage : 1.3v typical at up to 3a ? package : to - 2 52 ? scsi terminator ? linear regulator ? battery chargers ? micro-controller elm 1 085dg - s symbol a package d : to - 2 5 2 b product version g c taping d irection s : ref er to pkg file elm1085 d g - s a b c g e neral description f eatures applica tion maximum a bsolute ratings selection guide pin configuration pin no. pin name 1 adj/gnd 2/tab vout 3 v in to - 25 2 (top view) ? ? ? ? ? ? * taping d irection is one way.
2 typical application vout = vref (1 + r 2/r1) + iadj r2 * cin needed i f device is far from filter capacitors. * cout require d for stability. * we recommend to use min. 10 f tantalum condenser. elm 1085 d g bipolar 3 a ldo v oltage regulato r parameter symbol condition min. typ. max. unit reference voltage vref iout =1 0 ma, vin = 5 v 1.23 1.25 1.27 v line regulation vout / vin iout =1 0 ma, vin =( vout + 1.5v) to 7v 0.5 2.0 % load regulation vout / iout iout =1 0ma to 3 a, vin - vout = 3 v 0.5 2.5 % dropout voltage vdif iout = 3 a, vref =1 % 1.30 1.45 v current limit ilim vin - vout = 2 v 4 5 a min.load current il (min ) 1.5v( vin - vout) 5.75v 10 ma adjust pin current iadj 55 100 a rms output noise vn vout 0.003 % mv ripple rejection ratio rr f=120hz, vin =5 v, iout = 3 a, cout =22 f 60 72 db top = 25 c electrical characteristics marking v r e f i a d j e l m 1 0 8 5 d g c i n c o u t ? ? ? ? ? ? ? ? r 1 r 2 v i n a d j v i n v o u t v o u t 3 - to - 252 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? l 1 085 d g a to i : ldo : product no.code : pkg type (to-252) : p b-free package mark : production code
3 ? ?????????? ???????????????????????????????? t j =125 c t j =25 c t j =-40 c dropout voltage vs. output current dropout voltage(v) output current(a) 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.5 0.4 0.2 0 3.0 2.5 2.0 1.5 1.0 0.5 0 temperature(c) 10 9 8 7 6 5 4 3 2 1 150 100 50 -50 0 short-circuit current vs.temperature v in -v out(short circuit) =5v short-circuit current(a) v in -v out(short circuit) =3.3v percent change in output voltage vs.temperature output voltage change(%) temperature( c) 2 1.5 1 0.5 0 -0.5 -1 -1.5 -2 150 125 100 75 50 25 0 -25 -50 adjust pin current vs.temperature adjust pin current ( a) temperature( c) 100 90 80 70 60 50 40 30 20 10 0 -50 -25 0 25 50 75 100 125 150 i o ut =3a v r ip ple(p-p) =1v v in -v o ut =3v 90 80 70 60 50 40 30 20 10 0 100k 10k 1k 100 10 r ipple r ejection vs. frequency ripple rejection(db) frequency(h z) maximum power dissipation* power(w) case temperature( c) 20 18 16 14 12 10 8 6 4 2 0 150 130 110 90 70 50 *as limited by maximum junction temperature ?? ??? ?? ??? ?? ??? ??? ??????????? ? ? ? ???????????????????????? ??? typical characteristics out 3 - elm 1085 d g bipolar 3 a ldo v oltage regulato r
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