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1/19 august 2002 n typical dropout 1.3v at 1.5a n three terminal adjustable or fixed output voltage 1.5v, 1.8v, 2.5v, 2.85v, 3.3v, 3.6v, 5v, 8v, 9v, 12v. n guaranteed output current up to 1.5a n ouput tolerance 1% at 25 c and 2% in full temperature range n internal power and thermal limit n wide operating temperature range -40 c to 125 c n package available : to-220, d 2 pak, d 2 pak/a, dpak n pinout compatibility with standard adjustable vreg description the ld1086 is a low drop voltage regulator able to provide up to 1.5a of output current. dropout is guaranteed at a maximum of 1.5v at the maximum output current, decreasing at lower loads. the ld1086 is pin to pin compatible with the older 3-terminal adjustable regulators, but has better performances in term of drop and output tolerance . a 2.85v output version is suitable for scsi-2 active termination. unlike pnp regulators, where a part of the output current is wasted as quiescent current, the ld1086 quiescent current flows into the load, so increase efficiency. only a 10 m f minimum capacitor is need for stability. the device is supplied in to-220, d 2 pak, d 2 pak/a and dpak. on chip trimming allows the regulator to reach a very tight output voltage tolerance, within 1% at 25 c. ld1086 series 1.5a low drop positive voltage regulator adjustable and fixed schematic diagram to-220 d 2 pak d 2 pak d 2 pak/a
ld1086 series 2/19 absolute maximum ratings absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these condition is not implied. thermal data application circuits symbol paramet er value unit v i dc input voltage 30 v i o output current internally limited ma p d power dissipation internally limited mw t stg storage temperature range -55 to +150 c t op operating junction temperature range -40 to +125 c symbol parameter to-220 d 2 pak dpak unit r thj-case thermal resistance junction-case 338 c/w r thj-amb thermal resistance junction-ambient 50 62.5 c/w r 2 v o =v ref (1 + ?? ) r 1
ld1086 series 3/19 connection diagram (top view) ordering codes (*) available in tape & reel with the suffix oro for fixed version and o-ro for adjustable version. to-220 d 2 pak d 2 pak/a dpak to-220 d 2 pak (*) d 2 pak/a (*) dpak (*) output voltage ld1086v15 ld1086d2t15 ld1086d2m15 ld1086dt15 1.5 v ld1086v18 ld1086d2t18 ld1086d2m18 ld1086dt18 1.8 v ld1086v25 ld1086d2t25 ld1086d2m25 ld1086dt25 2.5 v ld1086v28 ld1086d2t28 ld1086d2m28 ld1086dt28 2.85 v ld1086v33 ld1086d2t33 ld1086d2m33 ld1086dt33 3.3 v ld1086v36 ld1086d2t36 ld1086d2m36 ld1086dt36 3.6 v ld1086v50 ld1086d2t50 ld1086d2m50 ld1086dt50 5.0 v ld1086v80 ld1086d2t80 ld1086d2m80 ld1086dt80 8.0 v ld1086v90 ld1086d2t90 ld1086d2m90 ld1086dt90 9.0 v ld1086v120 ld1086d2t120 LD1086D2M120 ld1086dt120 12.0 v ld1086v ld1086d2t ld1086d2m ld1086dt adj
ld1086 series 4/19 electrical characteristics of ld1086#15 (v i =4.5v, c i =c o =10 m f, t a = -40 to 125 c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. electrical characteristics of ld1086#18 (v i =4.8v, c i =c o =10 m f, t a = -40 to 125 c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. symbol parameter test condition s min. typ. max. unit v o output voltage (note 1) i o =0ma t j =25 c 1.485 1.5 1.515 v i o = 0 to 1.5a v i = 3.4 to 30v 1.47 1.5 1.53 v d v o line regulation i o =0ma v i = 3.1 to 18v t j =25 c 0.2 4 mv i o =0ma v i = 3.1 to 15v 0.4 4 mv d v o load regulation i o = 0 to 1.5a t j =25 c 0.5 8 mv i o = 0 to 1.5a 1 16 v v d dropout voltage i o = 1.5a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 1.5 2 a v i -v o = 25v 0.05 0.02 a termal regulation t a =25 c, 30ms pulse 0.01 0.04 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o = 1.5a v i = 6.5 3v 60 82 db en rms output noise voltage (% of v o ) t a =25 c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125 c 1000hrs 0.5 % symbol parameter test condition s min. typ. max. unit v o output voltage (note 1) i o =0ma t j =25 c 1.782 1.8 1.818 v i o = 0 to 1.5a v i = 3.4 to 30v 1.764 1.8 1.836 v d v o line regulation i o =0ma v i = 3.4 to 18v t j =25 c 0.2 4 mv i o =0ma v i = 3.4 to 15v 0.4 4 mv d v o load regulation i o = 0 to 1.5a t j =25 c 0.5 8 mv i o = 0 to 1.5a 1 16 v v d dropout voltage i o = 1.5a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 1.5 2 a v i -v o = 25v 0.05 0.02 a termal regulation t a =25 c, 30ms pulse 0.01 0.04 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o = 1.5a v i = 6.8 3v 60 82 db en rms output noise voltage (% of v o ) t a =25 c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125 c 1000hrs 0.5 %
ld1086 series 5/19 electrical characteristics of ld1086#25 (v i =5.5v, c i =c o =10 m f, t a = -40 to 125 c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. electrical characteristics of ld1086#285 (v i =5.85v, c i =c o =10 m f, t a = -40 to 125 c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. symbol parameter test condition s min. typ. max. unit v o output voltage (note 1) i o =0ma t j =25 c 2.475 2.5 2.525 v i o = 0 to 1.5a v i = 4.1 to 30v 2.45 2.5 2.55 v d v o line regulation i o =0ma v i = 4.1 to 18v t j =25 c 0.2 4 mv i o =0ma v i = 4.1 to 18v 0.4 4 mv d v o load regulation i o = 0 to 1.5a t j =25 c 0.5 8 mv i o = 0 to 1.5a 1 16 v v d dropout voltage i o = 1.5a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 1.5 2 a v i -v o = 25v 0.05 0.2 a termal regulation t a =25 c, 30ms pulse 0.008 0.04 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o = 1.5a v i = 7.5 3v 60 81 db en rms output noise voltage (% of v o ) t a =25 c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125 c 1000hrs 0.5 % symbol parameter test condition s min. typ. max. unit v o output voltage (note 1) i o =0ma t j =25 c 2.821 2.85 2.879 v i o = 0 to 1.5a v i = 4.5 to 30v 2.793 2.85 2.907 v d v o line regulation i o =0ma v i = 4.5 to 18v t j =25 c 0.2 6 mv i o =0ma v i = 4.5 to 18v 0.5 6 mv d v o load regulation i o = 0 to 1.5a t j =25 c 1 12 mv i o = 0 to 1.5a 2 20 v v d dropout voltage i o = 1.5a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 1.5 2 a v i -v o = 25v 0.05 0.2 a termal regulation t a =25 c, 30ms pulse 0.01 0.04 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o = 1.5a v i = 7.85 3v 60 80 db en rms output noise voltage (% of v o ) t a =25 c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125 c 1000hrs 0.5 %
ld1086 series 6/19 electrical characteristics of ld1086#33 (v i =6.3v, c i =c o =10 m f, t a = -40 to 125 c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. electrical characteristics of ld1086#36 (v i =6.6v, c i =c o =10 m f, t a = -40 to 125 c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. symbol parameter test condition s min. typ. max. unit v o output voltage (note 1) i o =0ma t j =25 c 3.267 3.3 3.333 v i o = 0 to 1.5a` v i = 4.9 to 30v 3.234 3.35 3.366 v d v o line regulation i o =0ma v i = 4.9 to 18v t j =25 c 0.5 6 mv i o =0ma v i = 4.9 to 18v 1 6 mv d v o load regulation i o = 0 to 1.5a t j =25 c 1 10 mv i o = 0 to 1.5a 7 25 v v d dropout voltage i o = 1.5a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 1.5 2 a v i -v o = 25v 0.05 0.2 a termal regulation t a =25 c, 30ms pulse 0.008 0.04 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o = 1.5a v i = 8.3 3v 60 79 db en rms output noise voltage (% of v o ) t a =25 c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125 c 1000hrs 0.5 % symbol parameter test condition s min. typ. max. unit v o output voltage (note 1) i o =0ma t j =25 c 3.564 3.6 3.636 v i o = 0 to 1.5a v i = 5.2 to 30v 3.528 3.6 3.672 v d v o line regulation i o =0ma v i = 5.2 to 18v t j =25 c 0.5 10 mv i o =0ma v i = 5.2 to 18v 1 10 mv d v o load regulation i o = 0 to 1.5a t j =25 c 3 15 mv i o = 0 to 1.5a 7 25 v v d dropout voltage i o = 1.5a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 1.5 2 a v i -v o = 25v 0.05 0.2 a termal regulation t a =25 c, 30ms pulse 0.01 0.04 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o = 1.5a v i = 8.6 3v 60 78 db en rms output noise voltage (% of v o ) t a =25 c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125 c 1000hrs 0.5 %
ld1086 series 7/19 electrical characteristics of ld1086#50 (v i =8v, c i =c o =10 m f, t a = -40 to 125 c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. electrical characteristics of ld1086#80 (v i =11v, c i =c o =10 m f, t a = -40 to 125 c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. symbol parameter test condition s min. typ. max. unit v o output voltage (note 1) i o =0ma t j =25 c 4.95 5 5.05 v i o = 0 to 1.5a v i = 6.6 to 30v 4.9 5 5.1 v d v o line regulation i o =0ma v i = 6.6 to 20v t j =25 c 0.5 10 mv i o =0ma v i = 6.6 to 20v 1 10 mv d v o load regulation i o = 0 to 1.5a t j =25 c 5 20 mv i o = 0 to 1.5a 10 35 v v d dropout voltage i o = 1.5a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 1.5 2 a v i -v o = 25v 0.05 0.2 a termal regulation t a =25 c, 30ms pulse 0.01 0.04 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o = 1.5a v i =10 3v 60 75 db en rms output noise voltage (% of v o ) t a =25 c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125 c 1000hrs 0.5 % symbol parameter test condition s min. typ. max. unit v o output voltage (note 1) i o =0ma t j =25 c 7.92 8 8.08 v i o = 0 to 1.5a v i = 9.8 to 30v 7.84 8 8.16 v d v o line regulation i o =0ma v i = 9.8 to 20v t j =25 c 1 18 mv i o =0ma v i = 9.8 to 20v 2 18 mv d v o load regulation i o = 0 to 1.5a t j =25 c 8 30 mv i o = 0 to 1.5a 12 60 v v d dropout voltage i o =1.5a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 1.5 2 a v i -v o = 25v 0.04 0.2 a termal regulation t a =25 c, 30ms pulse 0.01 0.04 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o = 1.5a v i =13 3v 54 71 db en rms output noise voltage (% of v o ) t a =25 c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125 c 1000hrs 0.5 %
ld1086 series 8/19 electrical characteristics of ld1086#90 (v i =12v, c i =c o =10 m f, t a = -40 to 125 c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. electrical characteristics of ld1086#120 (v i =15v, c i =c o =10 m f, t a = -40 to 125 c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. symbol parameter test condition s min. typ. max. unit v o output voltage (note 1) i o =0ma t j =25 c 8.91 9 9.09 v i o = 0 to 1.5a v i = 11 to 30v 8.82 9 9.18 v d v o line regulation i o =0ma v i = 11 to 20v t j =25 c 1 20 mv i o =0ma v i = 11 to 20v 2 20 mv d v o load regulation i o = 0 to 1.5a t j =25 c 8 30 mv i o = 0 to 1.5a 12 60 v v d dropout voltage i o = 1.5a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 1.5 2 a v i -v o = 25v 0.05 0.2 a termal regulation t a =25 c, 30ms pulse 0.01 0.04 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o = 1.5a v i =14 3v 54 70 db en rms output noise voltage (% of v o ) t a =25 c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125 c 1000hrs 0.5 % symbol parameter test condition s min. typ. max. unit v o output voltage (note 1) i o =0ma t j =25 c 11.88 12 12.12 v i o = 0 to 1.5a v i = 13.8 to 30v 11.76 12 12.24 v d v o line regulation i o =0ma v i =13.8to25v t j =25 c 1 25 mv i o =0ma v i =13.8to25v 2 25 mv d v o load regulation i o = 0 to 1.5a t j =25 c1236mv i o = 0 to 1.5a 24 72 v v d dropout voltage i o = 1.5a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 1.5 2 a v i -v o = 25v 0.05 0.2 a termal regulation t a =25 c, 30ms pulse 0.01 0.04 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o = 1.5a v i =17 3v 54 66 db en rms output noise voltage (% of v o ) t a =25 c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125 c 1000hrs 0.5 %
ld1086 series 9/19 electrical characteristics of ld1086# (v i =4.25v, c i =c o =10 m f, t a = -40 to 125 c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. symbol parameter test condition s min. typ. max. unit v o output voltage (note 1) i o = 10ma t j =25 c 1.237 1.25 1.263 v i o = 10ma to 1.5a v i = 2.85 to 30v 1.225 1.25 1.275 v d v o line regulation i o = 10ma v i = 2.8 to 16.5v t j =25 c 0.015 0.2 % i o = 10ma v i = 2.8 to 16.5v 0.035 0.2 % d v o load regulation i o = 10ma to 1.5a t j =25 c 0.1 0.3 % i o = 0 to 1.5a 0.2 0.4 % v d dropout voltage i o = 1.5a 1.3 1.5 v i o(min) minimum load current v i = 30v 3 10 ma i sc short circuit current v i -v o = 5v 1.5 2.3 a v i -v o = 25v 0.05 0.2 a termal regulation t a =25 c, 30ms pulse 0.01 0.04 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, c adj =25 m f, i o = 1.5a v i = 6.25 3v 60 88 db i adj adjust pin current v i = 4.25v i o =10ma 40 120 m a d i adj adjust pin current change i o = 10ma to 1.5a v i = 2.8 to 16.5v (note 1) 0.2 5 m a en rms output noise voltage (% of v o ) t a =25 c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125 c 1000hrs 0.5 %
ld1086 series 10/19 typical characteristics (unless otherwise specified t j =25 c, c i =c o =10 m f) figure 1 : output voltage vs temperature figure 2 : output voltage vs temperature figure 3 : output voltage vs temperature figure 4 : short circuit current vs dropout voltage figure 5 : line regulation vs temperature figure 6 : load regulation vs temperature
ld1086 series 11/19 figure 7 : dropout voltage vs temperature figure 8 : dropout voltage vs output current figure 9 : adjust pin current vs input voltage figure 10 : adjust pin current vs temperature figure 11 : adjust pin current vs output current figure 12 : quiescent current vs output current
ld1086 series 12/19 figure 13 : quiescent current vs input voltage figure 14 : supply voltage rejection vs output current figure 15 : supply voltage rejection vs frequency figure 16 : supply voltage rejection vs temperature figure 17 : minimum load current vs temperature figure 18 : stability for adjustable
ld1086 series 13/19 figure 19 : stability for 2.85v figure 20 : stability for 12v figure 21 : line transient figure 22 : line transient figure 23 : line transient figure 24 : load transient v i =12 to 13v, i o =200ma, c i =1 m f(tant), c o =10 m f(tant), no c adj v i =12 to 13v, i o =200ma, c i =1 m f(tant), c o =10 m f(tant), no c adj v i =12 to 13v, i o =200ma, c i =1 m f(tant), c o =10 m f(tant), c adj =1 m f v i =13v, i o =0.1 to 1.5a, c i =1 m f(tant), c o =10 m f(tant) c adj =1 m f
ld1086 series 14/19 figure 25 : load transient figure 26 : thermal protection v i =13v, i o =0.1 to 1.5a, c i =1 m f(tant), c o =10 m f(tant) c adj =1 m f v o =2.85 v
ld1086 series 15/19 dim. mm. inch min. typ max. min. typ. max. a 4.40 4.60 0.173 0.181 c 1.23 1.32 0.048 0.051 d 2.40 2.72 0.094 0.107 d1 1.27 0.050 e 0.49 0.70 0.019 0.027 f 0.61 0.88 0.024 0.034 f1 1.14 1.70 0.044 0.067 f2 1.14 1.70 0.044 0.067 g 4.95 5.15 0.194 0.203 g1 2.4 2.7 0.094 0.106 h2 10.0 10.40 0.393 0.409 l2 16.4 0.645 l4 13.0 14.0 0.511 0.551 l5 2.65 2.95 0.104 0.116 l6 15.25 15.75 0.600 0.620 l7 6.2 6.6 0.244 0.260 l9 3.5 3.93 0.137 0.154 dia. 3.75 3.85 0.147 0.151 to-220 mechanical dat a p011c
ld1086 series 16/19 dim. mm. inch min. typ max. min. typ. max. a 4.4 4.6 0.173 0.181 a1 2.49 2.69 0.098 0.106 a2 0.03 0.23 0.001 0.009 b 0.7 0.93 0.027 0.036 b2 1.14 1.7 0.044 0.067 c 0.45 0.6 0.017 0.023 c2 1.23 1.36 0.048 0.053 d 8.95 9.35 0.352 0.368 d1 8 0.315 e 10 10.4 0.393 0.409 e1 8.5 0.335 g 4.88 5.28 0.192 0.208 l 15 15.85 0.590 0.624 l2 1.27 1.4 0.050 0.055 l3 1.4 1.75 0.055 0.068 m 2.4 3.2 0.094 0.126 r 0.4 0.016 v2 0 8 0 8 d 2 pak mec hanical data p011p6g
ld1086 series 17/19 dim. mm. inch min. typ max. min. typ. max. a 4.40 4.60 0.173 0.181 a1 2.49 2.69 0.098 0.106 b 0.7 0.93 0.027 0.036 b2 1.14 1.7 0.044 0.067 c 0.45 0.60 0.017 0.023 c2 1.21 1.36 0.047 0.053 d 8.95 9.35 0.352 0.368 e 10 10.4 0.393 0.409 g 4.88 5.28 0.192 0.208 l 15 15.85 0.590 0.106 l2 1.27 1.4 0.050 0.055 d 2 pak/a mecha nical data
ld1086 series 18/19 dim. mm. inch min. typ max. min. typ. max. a 2.2 2.4 0.086 0.094 a1 0.9 1.1 0.035 0.043 a2 0.03 0.23 0.001 0.009 b 0.64 0.9 0.025 0.035 b2 5.2 5.4 0.204 0.212 c 0.45 0.6 0.017 0.023 c2 0.48 0.6 0.019 0.023 d 6 6.2 0.236 0.244 e 6.4 6.6 0.252 0.260 g 4.4 4.6 0.173 0.181 h 9.35 10.1 0.368 0.397 l2 0.8 0.031 l4 0.6 1 0.023 0.039 dpak mechani cal data 0068772-b
ld1086 series 19/19 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectronics. ? the st logo is a registered trademark of stmicroelectronics ? 2002 stmicroelectronics - printed in italy - all rights reserved stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany - hong kong - india - israel - italy - japan - malaysia - malta - morocco singapore - spain - sweden - switzerland - united kingdom - united states. ? http://www.st.com

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