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1/20 february 2005 typical dropout 1.3v (at 5a) three terminal adjustable or fixed output voltage 1.5, 1.8v, 2.5v, 2.85v, 3.3v, 3.6v, 5v, 8v, 9v, 12v. guaranteed output current up to 5a ouput tolerance 1% at 25c and 2% in full temperature range internal power and thermal limit wide operating temperature range -40c to 125c package available: to-220, d 2 pak, d 2 pak/a pinout compatibility with standard adjustable vreg description the ld1084 is a low drop voltage regulator able to provide up to 5a of output current. dropout is guaranteed at a maximum of 1.5v at the maximum output current, decreasing at lower loads. the ld1084 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 ld1084 quiescent current flows into the load, so increase efficiency. only a 10f minimum capacitor is need for stability. the device is supplied in to-220, d 2 pak and d 2 pak/a. on chip trimming allows the regulator to reach a very tight output voltage tolerance, within 1% at 25c. ld1084 series 5a low drop positive voltage regulator adjustable and fixed figure 1: schematic diagram to-220 d 2 pak d 2 pa k/a rev. 4
ld1084 series 2/20 figure 2: application circuits figure 3: pin connection (top view) table 1: order codes (*) available in tape & reel with the suffix "r" for fixed versions and "-r" for adjustable version type d 2 pak (*) d 2 pak/a output voltage ld1084v15 ld1084d2t15 ld1084d2m15 1.5 v ld1084v18 ld1084d2t18 ld1084d2m18 1.8 v ld1084v25 ld1084d2t25 ld1084d2m25 2.5 v ld1084v28 ld1084d2t28 ld1084d2m28 2.85 v ld1084v33 ld1084d2t33 ld1084d2m33 3.3 v ld1084v36 ld1084d2t36 ld1084d2m36 3.6 v ld1084v50 ld1084d2t50 ld1084d2m50 5.0 v ld1084v80 ld1084d2t80 ld1084d2m80 8.0 v ld1084v90 ld1084d2t90 ld1084d2m90 9.0 v ld1084v12 ld1084d2t12 ld1084d2m12 12.0 v ld1084v ld1084d2t ld1084d2m adj r 2 v o = v ref (1 + ?? ) r 1 to-220 d 2 pak d 2 pak/a
ld1084 series 3/20 table 2: absolute maximum ratings absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these conditi on is not implied. table 3: thermal data table 4: electrical characteristics of ld1084#15 (v i =4.5v, c i = c o =10 f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. symbol parameter 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 unit r thj-case thermal resistance junction-case 33c/w r thj-amb thermal resistance junction-ambient 50 62.5 c/w symbol parameter test conditions min. typ. max. unit v o output voltage i o = 0 ma t j = 25c 1.485 1.5 1.515 v i o = 0 to 5av i = 3.1 to 30v (note 1) 1.47 1.5 1.53 v ? v o line regulation i o = 0 ma v i = 3.1 to 18v t j = 25c 0.5 6 mv i o = 0 ma v i = 3.1 to 15v 0.1 6 mv ? v o load regulation i o = 0 to 5at j = 25c 3 15 mv i o = 0 to 5a 7 20 mv v d dropout voltage i o =5 a 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 5.5 6.5 a v i - v o = 25v 0.5 0.7 a thermal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i = 6.8 3v 60 75 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 %
ld1084 series 4/20 table 5: electrical characteristics of ld1084#18 (v i =4.8v, c i = c o =10 f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. table 6: electrical characteristics of ld1084#25 (v i =5.5v, c i = c o =10 f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. symbol parameter test conditions min. typ. max. unit v o output voltage i o = 0 ma t j = 25c 1.782 1.8 1.818 v i o = 0 to 5av i = 3.4 to 30v (note 1) 1.764 1.8 1.836 v ? v o line regulation i o = 0 ma v i = 3.4 to 18v t j = 25c 0.5 6 mv i o = 0 ma v i = 3.4 to 15v 0.1 6 mv ? v o load regulation i o = 0 to 5at j = 25c 3 15 mv i o = 0 to 5a 7 20 mv v d dropout voltage i o =5 a 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 5.5 6.5 a v i - v o = 25v 0.5 0.7 a thermal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i = 6.8 3v 60 75 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 % symbol parameter test conditions min. typ. max. unit v o output voltage i o = 0 ma t j = 25c 2.475 2.5 2.525 v i o = 0 to 5av i = 4.1 to 30v (note 1) 2.45 2.5 2.55 v ? v o line regulation i o = 0 ma v i = 4.1 to 18v t j = 25c 0.5 6 mv i o = 0 ma v i = 4.1 to 18v 0.1 6 mv ? v o load regulation i o = 0 to 5at j = 25c 3 15 mv i o = 0 to 5a 7 20 mv v d dropout voltage i o =5 a 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 5.5 6.5 a v i - v o = 25v 0.5 0.7 a thermal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i = 7.5 3v 60 72 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 %
ld1084 series 5/20 table 7: electrical characteristics of ld1084#285 (v i =5.85v, c i = c o =10 f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. table 8: electrical characteristics of ld1084#33 (v i =6.3v, c i = c o =10 f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. symbol parameter test conditions min. typ. max. unit v o output voltage i o = 0 ma t j = 25c 2.821 2.85 2.879 v i o = 0 to 5av i = 4.5 to 30v (note 1) 2.793 2.85 2.907 v ? v o line regulation i o = 0 ma v i = 4.5 to 18v t j = 25c 0.5 6 mv i o = 0 ma v i = 4.5 to 18v 0.1 6 mv ? v o load regulation i o = 0 to 5at j = 25c 3 15 mv i o = 0 to 5a 7 20 mv v d dropout voltage i o =5 a 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 5.5 6.5 a v i - v o = 25v 0.5 0.7 a thermal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i = 7.85 3v 60 72 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 % symbol parameter test conditions min. typ. max. unit v o output voltage i o = 0 ma t j = 25c 3.267 3.3 3.333 v i o = 0 to 5av i = 4.9 to 30v (note 1) 3.234 3.35 3.366 v ? v o line regulation i o = 0 ma v i = 4.9 to 18v t j = 25c 0.5 6 mv i o = 0 ma v i = 4.9 to 18v 0.1 6 mv ? v o load regulation i o = 0 to 5at j = 25c 3 15 mv i o = 0 to 5a 7 20 mv v d dropout voltage i o =5 a 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 5.5 6.5 a v i - v o = 25v 0.5 0.7 a thermal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i = 8.3 3v 60 72 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 %
ld1084 series 6/20 table 9: electrical characteristics of ld1084#36 (v i =6.6v, c i = c o =10 f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. table 10: electrical characteristics of ld1084#5 (v i =8v, c i = c o =10 f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. symbol parameter test conditions min. typ. max. unit v o output voltage i o = 0 ma t j = 25c 3.564 3.6 3.636 v i o = 0 to 5av i = 5.2 to 30v (note 1) 3.528 3.6 3.672 v ? v o line regulation i o = 0 ma v i = 5.2 to 18v t j = 25c 0.5 10 mv i o = 0 ma v i = 5.2 to 18v 0.1 10 mv ? v o load regulation i o = 0 to 5at j = 25c 3 15 mv i o = 0 to 5a 7 20 mv v d dropout voltage i o =5 a 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 5.5 6.5 a v i - v o = 25v 0.5 0.7 a thermal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i = 8.6 3v 60 72 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 % symbol parameter test conditions min. typ. max. unit v o output voltage i o = 0 ma t j = 25c 4.95 5 5.05 v i o = 0 to 5av i = 6.6 to 30v (note 1) 4.9 5 5.1 v ? v o line regulation i o = 0 ma v i = 6.6 to 20v t j = 25c 0.5 10 mv i o = 0 ma v i = 6.6 to 20v 1 10 mv ? v o load regulation i o = 0 to 5at j = 25c 5 20 mv i o = 0 to 5a 10 35 mv v d dropout voltage i o =5 a 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 5.5 6.5 a v i - v o = 25v 0.5 0.7 a thermal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i = 10 3v 60 72 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 %
ld1084 series 7/20 table 11: electrical characteristics of ld1084#8 (v i =11v, c i = c o =10 f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. table 12: electrical characteristics of ld1084#9 (v i =12v, c i = c o =10 f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. symbol parameter test conditions min. typ. max. unit v o output voltage i o = 0 ma t j = 25c 7.92 8 8.08 v i o = 0 to 5av i = 9.6 to 30v (note 1) 7.84 8 8.16 v ? v o line regulation i o = 0 ma v i = 9.6 to 20v t j = 25c 1 18 mv i o = 0 ma v i = 9.6 to 20v 2 18 mv ? v o load regulation i o = 0 to 5at j = 25c 8 30 mv i o = 0 to 5a 12 60 mv v d dropout voltage i o =5 a 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 5.5 6.5 a v i - v o = 25v 0.5 0.7 a thermal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i = 13 3v 54 71 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 % symbol parameter test conditions min. typ. max. unit v o output voltage i o = 0 ma t j = 25c 8.91 9 9.09 v i o = 0 to 5av i = 10.6 to 30v (note 1) 8.82 9 9.18 v ? v o line regulation i o = 0 ma v i = 10.6 to 20v t j = 25c 1 20 mv i o = 0 ma v i = 10.6 to 20v 2 20 mv ? v o load regulation i o = 0 to 5at j = 25c 8 30 mv i o = 0 to 5a 12 60 mv v d dropout voltage i o =5 a 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 5.5 6.5 a v i - v o = 25v 0.5 0.7 a thermal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i = 14 3v 54 70 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 %
ld1084 series 8/20 table 13: electrical characteristics of ld1084#12 (v i =15v, c i = c o =10 f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. symbol parameter test conditions min. typ. max. unit v o output voltage i o = 0 ma t j = 25c 11.88 12 12.12 v i o = 0 to 5av i = 13.6 to 30v (note 1) 11.76 12 12.24 v ? v o line regulation i o = 0 ma v i = 13.6 to 25v t j = 25c 2 25 mv i o = 0 ma v i = 13.6 to 25v 4 25 mv ? v o load regulation i o = 0 to 5at j = 25c 12 36 mv i o = 0 to 5a 24 72 mv v d dropout voltage i o =5 a 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 5.5 6.5 a v i - v o = 25v 0.5 0.7 a thermal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i = 17 3v 54 66 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 %
ld1084 series 9/20 table 14: electrical characteristics of ld1084 (v i =4.25v, c i = c o =10 f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. symbol parameter test conditions min. typ. max. unit v o output voltage i o = 10ma t j = 25c 1.237 1.25 1.263 v i o = 10ma to 5a v i = 2.85 to 30v (note 1) 1.225 1.25 1.275 v ? v o line regulation i o = 10ma v i = 2.85 to 16.5v t j = 25c 0.015 0.2 % i o = 10ma v i = 2.85 to 16.5v 0.035 0.2 % ? v o load regulation i o = 10ma to 5a t j = 25c 0.1 0.3 % i o = 10ma to 5a 0.2 0.4 % v d dropout voltage i o = 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 5.5 6.5 a v i - v o = 25v 0.5 0.7 a thermal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, c adj = 25 f, i o = 5a v i = 6.25 3v 60 72 db i adj adjust pin current v i = 4.25v i o = 10 ma 55 120 a ? i adj adjust pin current change i o = 10ma to 5a v i = 2.85 to 16.5v (note 1) 0.2 5 a en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 %
ld1084 series 10/20 typical characteristics (unless otherwise specified t j = 25c, c i =10 f (tant.), c o =22 f (tant.) figure 4: short circuit current vs dropout voltage figure 5: line regulation vs temperature figure 6: quiescent current vs temperature figure 7: output voltage vs temperature figure 8: load regulation vs temperature figure 9: quiescent current vs output voltage
ld1084 series 11/20 figure 10: quiescent current vs input voltage figure 11: dropout voltage vs output current figure 12: supply voltage rejection vs output current figure 13: dropout voltage vs temperature figure 14: supply voltage rejection vs temperature figure 15: supply voltage rejection vs frequency
ld1084 series 12/20 figure 16: adjust pin current vs output current figure 17: reference voltage vs temperature figure 18: load regulation vs temperature figure 19: adjust pin current vs temperature figure 20: line regulation vs temperature figure 21: minimum load current vs temperature
ld1084 series 13/20 figure 22: supply voltage rejection vs temperature figure 23: supply voltage rejection vs frequency figure 24: stability figure 25: supply voltage rejection vs output current figure 26: stability figure 27: line transient v i =14 to 15v, i o =200ma,c i = 1 f(tant), c o =10 f(tant), t s =t f =5 s
ld1084 series 14/20 figure 28: line transient figure 29: load transient figure 30: load transient figure 31: line transient figure 32: load transient v i =12 to 13v, i o =200ma, c i = 1 f(tant), c o =10 f(tant), no c adj t s =t f =5 s v i =15 v, i o =0.1 to 5 a, c i = 1 f(tant), c o =10 f(tant) v i =15 v, i o =0.1 to 5 a, c i = 1 f(tant), c o =10 f(tant), no c adj v i =12 to 13v, i o =200ma, c i = 1 f(tant), c o =10 f(tant), c adj = 1 f t s =t f =5 s v i =13 v, i o =0.1 to 5 a, c i = 1 f(tant), c o =10 f(tant)
ld1084 series 15/20 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
ld1084 series 16/20 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
ld1084 series 17/20 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 a2 0.03 0.23 0.001 0.009 b 0.7 0.93 0.028 0.037 b1 0.8 1.3 0.031 0.051 b2 1.14 1.7 0.045 0.067 c 0.45 0.60 0.018 0.024 c2 1.23 1.36 0.048 0.054 d 8.95 9.35 0.352 0.368 d1 8 0.315 e 10 10.4 0.394 0.409 e1 8.5 0.335 g 4.88 5.28 0.192 0.208 l 15 15.85 0.591 0.624 l2 1.27 1.4 0.050 0.055 m 2.4 3.2 0.094 0.126 r 0.4 0.016 v2 0 8 0 8 d 2 pak/a mechanical data 7106164/d
ld1084 series 18/20 dim. mm. inch min. typ max. min. typ. max. a 180 7.086 c 12.8 13.0 13.2 0.504 0.512 0.519 d 20.2 0.795 n 60 2.362 t 14.4 0.567 ao 10.50 10.6 10.70 0.413 0.417 0.421 bo 15.70 15.80 15.90 0.618 0.622 0.626 ko 4.80 4.90 5.00 0.189 0.193 0.197 po 3.9 4.0 4.1 0.153 0.157 0.161 p 11.9 12.0 12.1 0.468 0.472 0.476 ta pe & reel d 2 pak-p 2 pak-d 2 pak/a-p 2 pak/a mechanical data
ld1084 series 19/20 table 15: revision history date revision description of changes 07-oct-2004 3 mistake order codes - table 1. 08-feb-2005 4 mistake u.m. load regulation - v ==> mv.
ld1084 series 20/20 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the co nsequences 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 publicati on are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics prod ucts are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectro nics. the st logo is a registered trademark of stmicroelectronics all other names are the property of their respective owners ? 2005 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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