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1/18 october 2004 typical dropout 1.2v fast transient response three terminal adjustable or fixed output voltage 1.5v 1.8v, 2.5v, 2.85v, 3.3v, 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 0c to 125c package available: to-220, d 2 pak, d 2 pak/a pinout compatibility with standard adjustable vreg description the ld1585c is a low drop voltage regulator able to provide up to 5a of output current. dropout is guaranteed at a maximum of 1.4v at the maximum output current, decreasing at lower loads. the device has been improved to be utilized in low voltage applications where transient response and minimum input voltage are critical. the most important feature of the device consist in lower dropout voltage and very fast transient response. 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 ld1585c 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. ld1585c series 5a low dropout fast response positive voltage regulator adjustable and fixed figure 1: schematic diagram to-220 d 2 pa k d 2 pa k/a rev. 3
ld1585c series 2/18 figure 2: pin connection (top view) table 1: order codes (*) available in tape & reel with the suffix "r" for fixed version and "-r" for adjustable version. 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. to-220 d 2 pak (*) d 2 pak/a (*) output voltage ld1585cv15 ld1585cd2t15 ld1585cd2m15 1.5 v ld1585cv18 ld1585cd2t18 ld1585cd2m18 1.8 v ld1585cv25 ld1585cd2t25 ld1585cd2m25 2.5 v ld1585cv28 ld1585cd2t28 ld1585cd2m28 2.85 v ld1585cv33 ld1585cd2t33 ld1585cd2m33 3.3 v ld1585cv50 ld1585cd2t50 ld1585cd2m50 5.0 v ld1585cv80 ld1585cd2t80 ld1585cd2m80 8.0 v ld1585cv90 ld1585cd2t90 ld1585cd2m90 9.0 v ld1585cv12 ld1585cd2t12 ld1585cd2m12 12.0 v ld1585cv ld1585cd2t ld1585cd2m adj 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 0 to +125 c to-220 d 2 pak d 2 pak/a
ld1585c series 3/18 table 3: thermal data figure 3: application circuits (*) available in tape & reel with the suffix "r" for fixed version and "-r" for adjustable version. table 4: electrical characteristics of ld1585c#15 (v i =4.5v, c i = c o =10 f, t j = 0 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. 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 to 25v (note 1) 1.47 1.5 1.53 v ? v o line regulation i o = 0 ma v i = 3 to 15v t j = 25c 0.005 0.2 % i o = 0 ma v i = 3 to 15v 0.005 0.2 % ? v o load regulation i o = 0 to 5at j = 25c 0.05 0.3 % i o = 0 to 5a 0.05 0.5 % v d dropout voltage i o =5 a 1.2 1.4 v i q quiescent current v i 25v 5 10 ma i sc short circuit current v i - v o = 5v 5.5 7 a thermal regulation t j = 25c, 30ms pulse 0.004 0.02 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i - v o = 3 1v 60 75 db en rms output noise voltage (% of v o ) t j = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t j = 125c 1000hrs 0.03 1 % r 2 v o = v ref (1 + ?? ) r 1
ld1585c series 4/18 table 5: electrical characteristics of ld1585c#18 (v i =4.8v, c i = c o =10 f, t j = 0 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. table 6: electrical characteristics of ld1585c#25 (v i =5.5v, c i = c o =10 f, t j = 0 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 = 3.3 to 25v (note 1) 1.764 1.8 1.836 v ? v o line regulation i o = 0 ma v i = 3.3 to 15v t j = 25c 0.005 0.2 mv i o = 0 ma v i = 3.3 to 15v 0.005 0.2 ? v o load regulation i o = 0 to 5at j = 25c 0.05 0.3 mv i o = 0 to 5a 0.05 0.5 v d dropout voltage i o = 5 a 1.2 1.4 v i q quiescent current v i 25v 5 10 ma i sc short circuit current v i - v o = 5.5v 5.5 7 a thermal regulation t j = 25c, 30ms pulse 0.004 0.02 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i - v o = 3 1v 60 75 db en rms output noise voltage (% of v o ) t j = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t j = 125c 1000hrs 0.03 1 % 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 to 25v (note 1) 2.45 2.5 2.55 v ? v o line regulation i o = 0 ma v i = 4 to 16v t j = 25c 0.005 0.2 mv i o = 0 ma v i = 4 to 16v 0.005 0.2 ? v o load regulation i o = 0 to 5at j = 25c 0.05 0.3 mv i o = 0 to 5a 0.05 0.5 v d dropout voltage i o =5 a 1.2 1.4 v i q quiescent current v i 25v 5 10 ma i sc short circuit current v i - v o = 5.5v 5.5 7 a thermal regulation t j = 25c, 30ms pulse 0.004 0.02 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i - v o = 3 1v 60 75 db en rms output noise voltage (% of v o ) t j = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t j = 125c 1000hrs 0.03 1 %
ld1585c series 5/18 table 7: electrical characteristics of ld1585c#285 (v i =5.85v, c i = c o =10 f, t j = 0 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. table 8: electrical characteristics of ld1585c#33 (v i =6.3v, c i = c o =10 f, t j = 0 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 0.005 0.2 mv i o = 0 ma v i = 4.5 to 18v 0.005 0.2 ? v o load regulation i o = 0 to 5at j = 25c 0.05 0.3 mv i o = 0 to 5a 0.05 0.5 v d dropout voltage i o =5 a 1.2 1.4 v i q quiescent current v i 25v 5 10 ma i sc short circuit current v i - v o = 5.5v 5.5 7 a thermal regulation t j = 25c, 30ms pulse 0.004 0.02 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i - v o = 3 1v 60 75 db en rms output noise voltage (% of v o ) t j = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t j = 125c 1000hrs 0.03 1 % 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 = 4.8 to 25v (note 1) 3.234 3.35 3.366 v ? v o line regulation i o = 0 ma v i = 4.8 to 18v t j = 25c 0.005 0.2 mv i o = 0 ma v i = 4.9 to 18v 0.005 0.2 ? v o load regulation i o = 0 to 5at j = 25c 0.05 0.3 mv i o = 0 to 5a 0.05 0.5 v d dropout voltage i o =5 a 1.2 1.4 v i q quiescent current v i 25v 5 10 ma i sc short circuit current v i - v o = 5.5v 5.5 7 a thermal regulation t j = 25c, 30ms pulse 0.004 0.02 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i - v o = 3 1v 60 75 db en rms output noise voltage (% of v o ) t j = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t j = 125c 1000hrs 0.03 1 %
ld1585c series 6/18 table 9: electrical characteristics of ld1585c#50 (v i =8v, c i = c o =10 f, t j = 0 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. table 10: electrical characteristics of ld1585c#80 (v i =11v, c i = c o =10 f, t j = 0 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 4.95 5 5.05 v i o = 0 to 5av i = 6.5 to 30v (note 1) 4.9 5 5.1 v ? v o line regulation i o = 0 ma v i = 6.5 to 20v t j = 25c 0.005 0.2 mv i o = 0 ma v i = 6.5 to 20v 0.005 0.2 ? v o load regulation i o = 0 to 5at j = 25c 0.05 0.3 mv i o = 0 to 5a 0.05 0.5 v d dropout voltage i o =5 a 1.2 1.4 v i q quiescent current v i 25v 5 10 ma i sc short circuit current v i - v o = 5.5v 5.5 7 a thermal regulation t j = 25c, 30ms pulse 0.004 0.02 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i - v o = 3 1v 60 75 db en rms output noise voltage (% of v o ) t j = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t j = 125c 1000hrs 0.03 1 % 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 = 9.5 to 30v (note 1) 7.84 8 8.16 v ? v o line regulation i o = 0 ma v i = 9.5 to 20v t j = 25c 0.005 0.2 mv i o = 0 ma v i = 9.5 to 20v 0.005 0.2 ? v o load regulation i o = 0 to 5at j = 25c 0.05 0.3 mv i o = 0 to 5a 0.05 0.5 v d dropout voltage i o =5 a 1.2 1.4 v i q quiescent current v i 25v 5 10 ma i sc short circuit current v i - v o = 5.5v 5.5 7 a thermal regulation t j = 25c, 30ms pulse 0.004 0.02 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i - v o = 3 1v 60 75 db en rms output noise voltage (% of v o ) t j = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t j = 125c 1000hrs 0.03 1 %
ld1585c series 7/18 table 11: electrical characteristics of ld1585c#90 (v i =12v, c i = c o =10 f, t j = 0 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. table 12: electrical characteristics of ld1585c#12 (v i =15v, c i = c o =10 f, t j = 0 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 8.91 9 9.09 v i o = 0 to 5av i = 10.5 to 30v (note 1) 8.82 9 9.18 v ? v o line regulation i o = 0 ma v i = 10.5 to 20v t j = 25c 0.005 0.2 mv i o = 0 ma v i = 10.5 to 20v 0.005 0.2 ? v o load regulation i o = 0 to 5at j = 25c 0.05 0.3 mv i o = 0 to 5a 0.05 0.5 v d dropout voltage i o =5 a 1.2 1.4 v i q quiescent current v i 25v 5 10 ma i sc short circuit current v i - v o = 5.5v 5.5 7 a thermal regulation t j = 25c, 30ms pulse 0.004 0.02 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i - v o = 3 1v 60 75 db en rms output noise voltage (% of v o ) t j = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t j = 125c 1000hrs 0.03 1 % 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 = 13.5 to 30v (note 1) 11.76 12 12.24 v ? v o line regulation i o = 0 ma v i = 13.5 to 25v t j = 25c 0.005 0.2 mv i o = 0 ma v i = 13.5 to 25v 0.005 0.2 ? v o load regulation i o = 0 to 5at j = 25c 0.05 0.3 mv i o = 0 to 5a 0.05 0.5 v d dropout voltage i o =5 a 1.2 1.4 v i q quiescent current v i 25v 5 10 ma i sc short circuit current v i - v o = 5.5v 5.5 7 a thermal regulation t j = 25c, 30ms pulse 0.004 0.02 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, i o = 5a v i - v o = 3 1v 60 75 db en rms output noise voltage (% of v o ) t j = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t j = 125c 1000hrs 0.03 1 %
ld1585c series 8/18 table 13: electrical characteristics of ld1585c# (v i =4.25v, c i = c o =10 f, t j = 0 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. typical characteristics (unless otherwise specified t j = 25c, c i =c o =10 f tant) figure 4: output voltage vs temperature figure 5: short circuit current vs dropout voltage symbol parameter test conditions min. typ. max. unit v o output voltage i o = 10ma v i - v o = 3v t j = 25c 1.237 1.25 1.263 v i o = 10ma to 5av i - v o =1.5 to 25v (note 1) 1.225 1.25 1.275 v ? v o line regulation i o = 10ma v i = 2.75 to 15v t j = 25c 0.015 0.2 % i o = 10ma v i = 2.75 to 15v 0.1 0.2 % ? v o load regulation i o = 10ma to 5at j = 25c 0.1 0.3 % i o = 0 to 5a 0.25 0.5 % v d dropout voltage i o = 5a 1.2 1.4 v i o(min) minimum load current v i = 25v 3 10 ma i sc short circuit current v i - v o = 5.5v 5.5 7 a thermal regulation t j = 25c, 30ms pulse 0.004 0.02 %/w svr supply voltage rejection f = 120 hz, c o = 25 f, c adj = 25 f, i o = 5a v i - v o = 3 1v 60 75 db i adj adjust pin current i o = 10 ma 50 100 a ? i adj adjust pin current change i o = 10ma to 5a v i = 3 to 25v (note 1) 0.2 5 a en rms output noise voltage (% of v o ) t j = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t j = 125c 1000hrs 0.5 %
ld1585c series 9/18 figure 6: line regulation vs temperature figure 7: line regulation vs temperature figure 8: load regulation vs temperature figure 9: load regulation vs temperature figure 10: dropout voltage vs temperature figure 11: dropout voltage vs output current
ld1585c series 10/18 figure 12: adjust pin current vs input voltage figure 13: adjust pin current vs temperature figure 14: adjust pin current change vs temperature figure 15: quiescent current vs temperature figure 16: reference voltage vs temperature figure 17: minimum load current vs temperature
ld1585c series 11/18 figure 18: supply voltage rejection vs output current figure 19: supply voltage rejection vs output current figure 20: supply voltage rejection vs frequency figure 21: supply voltage rejection vs frequency figure 22: supply voltage rejection vs temperature figure 23: supply voltage rejection vs temperature
ld1585c series 12/18 figure 24: line transient figure 25: load transient figure 26: load transient v i =15 to 16v, i o =200ma, c i = 1 f(tant), c o =10 f(tant), v i =15 v, i o =0.1 to 5 a, c i = 10 f(tant), c o =10 f(tant) v i =7 v, i o =0.1 to 5 a, c i = 10 f(tant), c o =10 f(tant)
ld1585c series 13/18 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
ld1585c series 14/18 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
ld1585c series 15/18 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
ld1585c series 16/18 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
ld1585c series 17/18 table 14: revision history date revision description of changes 07-oct-2004 3 mistake order codes - table 1.
ld1585c series 18/18 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 ? 2004 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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