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june 2007 rev. 5 1/25 25 ld1585c series 5a low dropout fast response positive voltage regulator adjustable and fixed features 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 guaranteed output current up to 5a output 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/a pinout compatibility wi th 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 app lications 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. d 2 pak/a to-220 www.st.com order codes part number to-220 d 2 pak/a (t&r) output voltage ld1585cd2m15r 1.5 v ld1585cd2m18r 1.8 v ld1585cd2m25r 2.5 v ld1585cd2m28r 2.85 v ld1585cd2m33r 3.3 v ld1585cv50 LD1585CD2M50R 5.0 v ld1585cd2m80r 8.0 v ld1585cd2m90r 9.0 v ld1585cv ld1585cd2m-r adj
ld1585c series 2/25 contents 1 diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 8 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
ld1585c series diagram 3/25 1 diagram figure 1. schematic diagram
pin configuration ld1585c series 4/25 2 pin configuration figure 2. pin connections (top view) to-220 d 2 pak/a
ld1585c series maximum ratings 5/25 3 maximum ratings note: absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these condition is not implied table 1. absolute maximum ratings 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 table 2. thermal data symbol parameter to-220 d 2 pak/a unit r thjc thermal resistance junction-case 3 3 c/w r thja thermal resistance junction-ambient 50 62.5 c/w
typical application ld1585c series 6/25 4 typical application figure 3. application circuits v o = v ref (1+r 2 /r 1 )
ld1585c series electrical characteristics 7/25 5 electrical characteristics table 3. electrical characteristics of ld1585c#15 (v i =4.5v, c i = c o =10f, t j = 0 to 125c, unless otherwise specified.) 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 5a, v i = 3 to 25v (1) 1. see short-circuit current curve for available output current at fixed dropout. 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 5a, t 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 = 25f, 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 %
electrical characteristics ld1585c series 8/25 table 4. electrical characteristics of ld1585c#18 (v i =4.8v, c i = c o =10f, t j = 0 to 125c, unless otherwise specified.) 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 5a, v i = 3.3 to 25v (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 5a, t 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 = 25f, 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 % 1. see short-circuit current curve for available output current at fixed dropout.
ld1585c series electrical characteristics 9/25 table 5. electrical characteristics of ld1585c#25 (v i =5.5v, c i = c o =10f, t j = 0 to 125c, unless otherwise specified.) 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 5a, v i = 4 to 25v (1) 2.45 2.5 2.55 v v o line regulation i o = 0 ma, v i = 4 to 15v, t j = 25c 0.005 0.2 mv i o = 0 ma, v i = 4 to 15v 0.005 0.2 v o load regulation i o = 0 to 5a, t 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 = 25f, 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 % 1. see short-circuit current curve for available output current at fixed dropout.
electrical characteristics ld1585c series 10/25 table 6. electrical characteristics of ld1585c#285 (v i =5.85v, c i = c o =10f, t j = 0 to 125c, unless otherwise specified.) 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 5a, v i = 4.5 to 25v (1) 2.793 2.85 2.907 v v o line regulation i o = 0 ma, v i = 4.5 to 15v, t j = 25c 0.005 0.2 mv i o = 0 ma, v i = 4.5 to 15v 0.005 0.2 v o load regulation i o = 0 to 5a, t 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 = 25f, 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 % 1. see short-circuit current curve for available output current at fixed dropout.
ld1585c series electrical characteristics 11/25 table 7. electrical characteristics of ld1585c#33 (v i =6.3v, c i = c o =10f, t j = 0 to 125c, unless otherwise specified.) 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 5a, v i = 4.8 to 25v (1) 3.234 3.35 3.366 v v o line regulation i o = 0 ma, v i = 4.8 to 15v, t j = 25c 0.005 0.2 mv i o = 0 ma, v i = 4.9 to 15v 0.005 0.2 v o load regulation i o = 0 to 5a, t 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 = 25f, 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 % 1. see short-circuit current curve for available output current at fixed dropout.
electrical characteristics ld1585c series 12/25 table 8. electrical characteristics of ld1585c#50 (v i =8v, c i = c o =10f, t j = 0 to 125c, unless otherwise specified.) 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 5a, v i = 6.5 to 30v (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 5a, t 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 = 25f, 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 % 1. see short-circuit current curve for available output current at fixed dropout.
ld1585c series electrical characteristics 13/25 table 9. electrical characteristics of ld1585c#80 (v i =11v, c i = c o =10f, t j = 0 to 125c, unless otherwise specified.) 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 5a, v i = 9.5 to 30v (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 5a, t 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 = 25f, 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 % 1. see short-circuit current curve for available output current at fixed dropout.
electrical characteristics ld1585c series 14/25 table 10. electrical characteristics of ld1585c#90 (v i =12v, c i = c o =10f, t j = 0 to 125c, unless otherwise specified.) 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 5a, v i = 10.5 to 30v (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 5a, t 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 = 25f, 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 % 1. see short-circuit current curve for available output current at fixed dropout.
ld1585c series electrical characteristics 15/25 table 11. electrical characteristics of ld1585c# (v i =4.25v, c i = c o =10f, t j = 0 to 125c, unless otherwise specified.) 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 5a, v i - v o =1.5 to 25v (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 5a, t 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 = 25f, c adj = 25f, 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 (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 % 1. see short-circuit current curve for available output current at fixed dropout.
typical characteristics ld1585c series 16/25 6 typical characteristics (unless otherwise specified t j =25c, c i =c o =10f tant.) figure 4. output voltage vs temperature figure 5. short circuit current vs dropout voltage figure 6. line regulation vs temperature fi gure 7. line regulation vs temperature figure 8. load regulation vs temperature figure 9. load regulation vs temperature
ld1585c series typical characteristics 17/25 figure 10. dropout voltage vs temperature figure 11. dropout voltage vs output current 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
typical characteristics ld1585c series 18/25 figure 16. reference voltage vs temperature figure 17. minimum load current vs temperature 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
ld1585c series typical characteristics 19/25 figure 22. supply voltage rejection vs temperature figure 23. supply voltage rejection vs temperature figure 24. line transient figure 25. load transient v i =15 to 16v, i o =200ma, c i = 1f(tant), c o =10f(tant) v i =15 v, i o =0.1 to 5 a, c i = 10f(tant), c o =10f(tant) figure 26. load transient v i =7 v, i o =0.1 to 5 a, c i = 10f(tant), c o =10f(tant)
package mechanical data ld1585c series 20/25 7 package mechanical data in order to meet environmental requirements, st offers these devices in ecopack ? packages. these packages have a lead-free second level interconnect. the category of second level interconnect is marked on the package and on the inner box label, in compliance with jedec standard jesd97. the maximum ratings related to soldering conditions are also marked on the inner box label. ecopack is an st trademark. ecopack specifications are available at: www.st.com.
ld1585c series package mechanical data 21/25 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
package mechanical data ld1585c series 22/25 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 package mechanical data 23/25 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
revision history ld1585c series 24/25 8 revision history table 12. revision history date revision changes 07-oct-2004 3 mistake order codes - table 1. 20-oct-2005 4 order c odes has been updated. 08-jun-2007 5 order codes has been updated and the document has been reformatted.
ld1585c series 25/25 please read carefully: information in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st ?) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described he rein at any time, without notice. all st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a parti cular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. unless expressly approved in writing by an authorized st representative, st products are not recommended, authorized or warranted for use in milita ry, air craft, space, life saving, or life sustaining applications, nor in products or systems where failure or malfunction may result in personal injury, death, or severe property or environmental damage. st products which are not specified as "automotive grade" may only be used in automotive applications at user?s own risk. resale of st products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or registered trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2007 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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