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this is information on a product in full production. january 2013 doc id 023965 rev 2 1/25 25 ldk120xx 200 ma low quiescent current very low noise ldo datasheet ? production data features input voltage from 1.9 to 5.5 v very low dropout voltage (100 mv typ. at 100 ma load) low quiescent current (max. 100 a, 1 a in off mode) very low noise output voltage tolerance: 2.0% @ 25 c 200 ma guaranteed output current wide range of fixed output voltages available on request: from 0.8 v to 3.5 v with 100 mv step adjustable version: from 0.8 v to v in -v drop logic-controlled electronic shutdown compatible with ceramic capacitor c out = 1 f internal current and thermal limit available in sot23-5l, sot323-5l and dfn6 (1.2 x 1.3 mm) packages temperature range: -40 c to 125 c applications mobile phones personal digital assistants (pdas) cordless phones and similar battery-powered systems digital still cameras description the ldk120xx low drop voltage regulator provides 200 ma of maximum current from an input supply voltage in the range of 1.9 v to 5.5 v, with a typical dropout voltage of 100 mv. it is stabilized with a ceramic capacitor on the output. the very low drop voltage, low quiescent current and low noise features make it suitable for low power battery-powered applications. an enable logic control function puts the ldk120xx in shutdown mode allowing a total current consumption lower than 1 a. the device also includes a short-circuit constant current limiting and thermal protection. sot323-5l sot23-5l dfn6 (1.2 x 1.3 mm) table 1. device summary part numbers ldk120xx ldk120xx12 ldk120xx28 ldk120xx33 ldk120xx08 ldk120xx15 ldk120xx30 ldk120xx35 LDK120XX10 ldk120xx18 ldk120xx31 ldk120xx11 ldk120xx25 ldk120xx32 www.st.com
contents ldk120xx 2/25 doc id 023965 rev 2 contents 1 diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 8 order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 9 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
ldk120xx diagram doc id 023965 rev 2 3/25 1 diagram figure 1. block diagram
pin configuration ldk120xx 4/25 doc id 023965 rev 2 2 pin configuration figure 2. pin connection (top view) table 2. pin description (sot23-5l, sot323-5l) pin symbol function sot23/ sot323 dfn6 1 6 in input voltage of the ldo 2 2 gnd common ground 3 4 en enable pin logic input: low = shutdown, high = active 4 3 byp (1) /adj 1. bypass capacitor for noise reduction on fixed version is optional, if not used the relevant pin must be left floating with no routing on the board. bypass capacitor on fixed versions, adjustable pin on adj versions 5 1 out output voltage of the ldo - 5 n/c not connected. this pin should be connected to gnd sot23-5l, sot323-5l dfn6 (1.2 x 1.3)
ldk120xx typical application doc id 023965 rev 2 5/25 3 typical application figure 3. typical application circuits for fixed version figure 4. typical application circuits for adjustable version
maximum ratings ldk120xx 6/25 doc id 023965 rev 2 4 maximum ratings note: absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these conditions is not implied. all values are referred to gnd. table 3. absolute maximum ratings symbol parameter value unit v in dc input voltage - 0.3 to 6 v v out dc output voltage - 0.3 to v i + 0.3 v v en enable input voltage - 0.3 to v i + 0.3 v v byp/adj adj/bypass pin voltage 2 v i out output current internally limited ma p d power dissipation internally limited mw t stg storage temperature range - 65 to 150 c t op operating junction temperature range - 40 to 125 c table 4. thermal data symbol parameter sot23-5l sot323-5l dfn-6l unit r thja thermal resistance junction-ambient 160 246 237 c/w r thjc thermal resistance junction-case 68 134 104 c/w
ldk120xx electrical characteristics doc id 023965 rev 2 7/25 5 electrical characteristics t j = 25 c, v in = v out(nom) + 1 v, c in = c out = 1 f, i out = 1 ma, v en = v in , unless otherwise specified. table 5. electrical characteristics for ldk120xx symbol parameter test conditions min. typ. max. unit v in operating input voltage 1.9 5.5 v v out v out accuracy i out =1 ma, t j =25 c -2.0 2.0 % i out =1 ma, -40 c electrical characteristics ldk120xx 8/25 doc id 023965 rev 2 t j = 25 c, v in = v out(nom) + 1 v, c in = c out = 1 f, i out = 1 ma, v en = v in , unless otherwise specified. table 6. electrical characteristics for ldk120 symbol parameter test conditions min. typ. max. unit v in operating input voltage 1.9 5.5 v v adj v adj accuracy i out =1 ma, t j =25 c 784 800 816 mv i out =1 ma, -40 c ldk120xx typical performance characteristics doc id 023965 rev 2 9/25 6 typical performance characteristics c in = c out = 1 f, v en to v in , unless otherwise specified. figure 5. output voltage vs. temp. for adjustable (i o = 1 ma) figure 6. output voltage vs. temp. for adjustable version (i o = 200 ma) figure 7. output voltage vs. temp. for fixed version (i o = 1 ma) figure 8. output voltage vs. temp. for fixed version (i o = 200 ma) figure 9. line regulation vs. temp. for adjustable version figure 10. short-circuit current vs. temp. for adjustable version am12 8 00v1 0.750 0.760 0.770 0.7 8 0 0.790 0. 8 00 0. 8 10 0. 8 20 0. 83 0 0. 8 40 0. 8 50 -50 -25 0 25 50 75 100 125 150 v adj [ v ] temper a t u re [c] v in = 1.9 v, i out = 1 ma am16197v1 v in = 1.9 v, i out = 200 ma 0.750 0.760 0.770 0.7 8 0 0.790 0. 8 00 0. 8 10 0. 8 20 0. 83 0 0. 8 40 0. 8 50 -50 -25 0 25 50 75 100 125 150 v adj [v] temper a t u re [c] am1619 8 v1 v in = 4 v, i out = 1 ma 2.500 2.600 2.700 2. 8 00 2.900 3 .000 3 .100 3 .200 3 . 3 00 3 .400 3 .500 -50 -25 0 25 50 75 100 125 150 v out [v] temper a t u re [c] am16199v1 v in = 4 v, i out = 200 ma v out [v] 2.500 2.600 2.700 2. 8 00 2.900 3 .000 3 .100 3 .200 3 . 3 00 3 .400 3 .500 -50 -25 0 25 50 75 100 125 150 temper a t u re [c] am16200v1 0 0.01 0.02 0.0 3 0.04 0.05 0.06 0.07 0.0 8 0.09 0.1 -50 -25 0 25 50 75 100 125 150 line reg u l a tion [ % /v] temper a t u re [c] v in from 1.9 v to 5.5 v, i out = 1 ma am16201v1 200 250 3 00 3 50 400 450 500 550 600 -50 -25 0 25 50 75 100 125 150 i s hort [ma] temper a t u re [c] v in = 1.9 v
typical performance characteristics ldk120xx 10/25 doc id 023965 rev 2 figure 11. load regulation vs. temp. for adjustable version figure 12. load regulation vs. temp. for fixed version figure 13. enable pin thresholds vs. temp. (v in = 1.9 v) figure 14. enable pin thresholds vs. temp. figure 15. quiescent current vs. temp. for adjustable version (i o = 0 ma) figure 16. quiescent current vs. temp. for adjustable version (i o = 200 ma) am16202v1 0 0.002 0.004 0.006 0.00 8 0.01 -50 -25 0 25 50 75 100 125 150 lo a d reg u l a tion [ % /ma] temper a t u re [c] v in = 1.9 v, i out from 1 ma to 200 ma am1620 3 v1 0 0.002 0.004 0.006 0.00 8 0.01 -50 -25 0 25 50 75 100 125 150 lo a d reg u l a tion [ % /ma] temper a t u re [c] v in = 4 v, i out from 1 ma to 200 ma am16204v1 0.2 0. 3 0.4 0.5 0.6 0.7 0. 8 0.9 1 -50 -25 0 25 50 75 100 125 150 v en thre s hold s [v] temper a t u re [c] v in = 1.9 v, i out = 1 ma low high am16205v1 v in = 5.5 v, i out = 1 ma 0.000 0.200 0.400 0.600 0. 8 00 1.000 1.200 1.400 1.600 -50 -25 0 25 50 75 100 125 150 v en thre s hold s [v] temper a t u re [c] low high am16206v1 v in = 1.9 v, i out = 0 ma 0 10 20 3 0 40 50 60 70 8 0 90 100 -50 -25 0 25 50 75 100 125 150 q u ie s cent c u rrent [ a] temper a t u re [ c] am16207v1 0 20 40 60 8 0 100 120 140 160 1 8 0 200 -50 -25 0 25 50 75 100 125 150 q u ie s cent c u rrent [ a] temper a t u re [c] v in = 1.9 v, i out = 200 ma
ldk120xx typical performance characteristics doc id 023965 rev 2 11/25 figure 17. quiescent current vs. temp. for fixed version (i o = 0 ma) figure 18. quiescent current vs. temp. for fixed version (i o = 200 ma) figure 19. shutdown current vs. temperature figure 20. svr vs. frequency (v o = 2.5 v) figure 21. svr vs. frequency (v o = v adj ) figure 22. output noise vs. frequency (v o = 3.3 v) am1620 8 v1 v in = 4 v, i out = 0 ma 0 10 20 3 0 40 50 60 70 8 0 90 100 -50 -25 0 25 50 75 100 125 150 q u ie s cent c u rrent [ a] temper a t u re [c] am16209v1 v in = 4 v, i out = 200 ma 0 20 40 60 8 0 100 120 140 160 1 8 0 200 -50 -25 0 25 50 75 100 125 150 q u ie s cent c u rrent [ a] temper a t u re [c] am16210v1 0 0.1 0.2 0. 3 0.4 0.5 0.6 0.7 0. 8 0.9 1 -50 -25 0 25 50 75 100 125 150 q u ie s cent c u rrent [ a] temper a t u re [c] v in = 4 v , v en = gnd am16211v1 0 10 20 3 0 40 50 60 70 8 0 100 1000 10000 100000 s vr [db] v out = 2.5 v, v in = v out + 0.5 v +/ - 100 mv, i out = 10 ma c b yp =10 nf no c b yp fre qu ency [hz] am16212v1 v out = v , v in = v out + 0.5 v +/ - 100 mv, i out = 10 ma 0 10 20 3 0 40 50 60 70 8 0 100 1000 10000 100000 s vr [db] fre qu ency [hz] adj am1621 3 v1 0 0.2 0.4 0.6 0. 8 1 1.2 1.4 1000 10000 100000 en [ v/ sq rt (hz)] fre qu ency (hz) v in = 4. 3 v, i out = 10 ma c b yp = 10 nf no c b yp
typical performance characteristics ldk120xx 12/25 doc id 023965 rev 2 figure 23. output noise vs. frequency (v o = v adj ) figure 24. stability region vs. c out (fixed) v in = v en = 4 to 5.5 v, i out = 10 ma to 0.2 a, c in = 1 f, t a = 25 c am16214v1 v in = 1. 8 v, i out = 10 ma 0.0 0.2 0.4 0.6 0. 8 1.0 1.2 1.4 1000 10000 100000 en [ v/ sq rt (hz)] fre qu ency [hz] am16215v1 0 1 2 3 4 5 6 7 8 9 10 012 3 4567 8 91011121 3 14 15 16 17 1 8 19 20 21 22 2 3 e s r @ 100 khz [ ] c out [ f] (nomin a l v a l u e) s t ab ility a re a figure 25. stability region vs c out (adjust.) figure 26. line transient (v out = v adj ) v in = v en = 1.9 to 5.5 v, i out = 10 ma to 0.2 a, c in = 1 f, t a = 25 c v out = v adj, v in = 3.5 v to 4 v, v en = 2 v, i out = 1 ma, no c in , c out = 1 f, t r = t f = 5 s figure 27. line transient (v out = 3 v) figure 28. load transient (v out = 3 v) v out = 3 v, v in = 4 v to 4.5 v, v en = 2 v, i out = 1 ma, no c in , c out = 1 f, t r = t f = 5 s v out = 3 v, v in = v en = 3.5 v, i out = 1 ma to 200 ma, c out = 1 f, t r = t f = 5 s am16216v1 e s r @ 100 khz [ ] c out [ f] (nomin a l v a l u e) 0 1 2 3 4 5 6 7 8 9 10 012 3 4567 8 9 1011121 3 14 15 16 17 1 8 19 20 21 22 2 3 s t ab ility a re a
ldk120xx typical performance characteristics doc id 023965 rev 2 13/25 figure 29. load transient (v out = v adj ) figure 30. startup transient v out = v adj , v in = v en = 3.5 v, i out = 1 ma to 200 ma, c out = 1 f, t r = t f = 5 s v out = 3 v, v in = v en = 0 to 4.2 v, i out = 1 ma, c in = c out = 1 f, t r = t f = 5 s figure 31. enable transient (v out = v adj ) figure 32. enable transient (v out = 3 v) v out @ 0.8 v, v in = 1.9, v en = 0 to v in , i out = 200 ma, c out = 1 f, t r = t f = 1 s v in = 4 v, v en = 0 to v in , i out = 200 ma, c in = c out = 1 f, t r = t f = 1 s figure 33. dropout voltage vs. temperature (i out = 100 ma) figure 34. dropout voltage vs. temperature (i out = 200 ma) am16226v1 0 50 100 150 200 250 3 00 -50 -25 0 25 50 75 100 125 150 dropo u t volt a ge [mv] temper a t u re [ c] c in = c out = 1 f, i out = 100 ma, fixed 3 .0 v ver s ion am16227v1 c in = c out = 1 f, i out = 200 ma, fixed 3 .0 v ver s ion 0 50 100 150 200 250 3 00 -50 -25 0 25 50 75 100 125 150 dropo u t volt a ge [mv] temper a t u re [c]
package mechanical data ldk120xx 14/25 doc id 023965 rev 2 7 package mechanical data in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack specifications, grade definitions and product status are available at: www.st.com . ecopack is an st trademark. table 7. sot23-5l mechanical data dim. mm min. typ. max. a 0.90 1.45 a1 0.00 0.15 a2 0.90 1.30 b 0.30 0.50 c 0.09 0.20 d 2.80 3.05 e 1.50 1.75 e0.95 h 2.60 3.00 l 0.30 0.60 0 10
ldk120xx package mechanical data doc id 023965 rev 2 15/25 figure 35. sot23-5l drawing figure 36. sot23-5l footprint data (dimensions in mm) 7049676_i 7049676_i
package mechanical data ldk120xx 16/25 doc id 023965 rev 2 table 8. dfn6l (1.2 x 1.3 mm) mechanical data dim. mm min. typ. max. a 0.31 0.38 0.40 a1 0.00 0.02 0.05 b 0.15 0.18 0.25 c0.05 d1.20 e1.30 e0.40 l 0.475 0.525 0.575 l3 0.375 0.425 0.475
ldk120xx package mechanical data doc id 023965 rev 2 17/25 figure 37. dfn6l (1.2 x 1.3 mm) drawing
package mechanical data ldk120xx 18/25 doc id 023965 rev 2 figure 38. dfn6l foot print data (dimensions in mm) 8 272941_a
ldk120xx package mechanical data doc id 023965 rev 2 19/25 table 9. sot323-5l mechanical data dim. mm min. typ. max. a0.80 1.10 a1 0.00 0.10 a2 0.80 0.90 1.00 b0.15 0.30 c0.10 0.22 d 1.80 2.00 2.20 e 1.80 2.10 2.40 e1 1.15 1.25 1.35 e0.65 e1 1.3 l 0.26 0.36 0.46 0 8
package mechanical data ldk120xx 20/25 doc id 023965 rev 2 figure 39. sot323-5l drawing 709141 3 _f
ldk120xx package mechanical data doc id 023965 rev 2 21/25 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 n60 2.362 t 14.4 0.567 ao 3.13 3.23 3.33 0.123 0.127 0.131 bo 3.07 3.17 3.27 0.120 0.124 0.128 ko 1.27 1.37 1.47 0.050 0.054 0. 0.58 po 3.9 4.0 4.1 0.153 0.157 0.161 p 3.9 4.0 4.1 0.153 0.157 0.161 tape & reel sot23-xl mechanical data
package mechanical data ldk120xx 22/25 doc id 023965 rev 2 dim. mm. inch min. typ max. min. typ. max. a 175 180 185 6.889 7.086 7.283 c 12.8 13 13.2 0.504 0.512 0.519 d 20.2 0.795 n 59.5 60 60.5 2.362 t 14.4 0.567 ao 2.25 0.088 bo 2.7 0.106 ko 1.2 0.047 po 3.98 4 4.2 0.156 0.157 0.165 p 3.98 4 4.2 0.156 0.157 0.165 tape & reel sot323-xl mechanical data
ldk120xx order codes doc id 023965 rev 2 23/25 8 order codes table 10. order codes part numbers packages output voltages sot323-5l sot23-5l dfn6l ldk120xx ldk120c-r ldk120m-r ldk120pu-r adj ldk120xx08 ldk120c08r ldk120m08r ldk120pu08r 0.8 v LDK120XX10 ldk120c10r ldk120m10r ldk120pu10r 1.0 v ldk120xx11 ldk120c11r ldk120m11r 1.1 v ldk120xx12 ldk120c12r ldk120m12r 1.2 v ldk120xx15 ldk120c15r ldk120m15r 1.5 v ldk120xx18 ldk120c18r ldk120m18r 1.8 v ldk120xx25 ldk120c25r ldk120m25r 2.5 v ldk120xx28 ldk120c28r ldk120m28r 2.8 v ldk120xx30 ldk120c30r ldk120m30r ldk120pu30r 3.0 v ldk120xx31 ldk120c31r ldk120m31r 3.1 v ldk120xx32 ldk120c32r ldk120m32r ldk120pu32r 3.2 v ldk120xx33 ldk120c33r ldk120m33r 3.3 v ldk120xx35 ldk120c35r 3.5 v table 11. marking order codes packages output voltages marking ldk120mxxr sot23-5l xx v kxx ldk120cxxr sot323-5l xx v kxx ldk120puxxr dfn-6l xx v xx ldk120m-r sot23-5l adj kad ldk120c-r sot323-5l adj kad ldk120pu-r dfn-6l adj ad
revision history ldk120xx 24/25 doc id 023965 rev 2 9 revision history table 12. document revision history date revision changes 26-nov-2012 1 initial release 31-jan-2013 2 added new part number ldk120pu32r updated table 10 on page 23
ldk120xx doc id 023965 rev 2 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 particular 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 two authorized st representatives, st products are not recommended, authorized or warranted for use in military, 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 register ed 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. ? 2013 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 - philippines - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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