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this is information on a product in full production. july 2013 docid7194 rev 26 1/24 ld1117a low drop fixed and adjustable positive voltage regulators datasheet - production data features ? low dropout voltage: ? 1.15 v typ. @ i out = 1 a, 25 c ? very low quiescent current: ? 5 ma typ. @ 25 c ? output current up to 1 a ? fixed output voltage of: ? 1.2 v, 1.8 v, 3.3 v ? adjustable version availability (v ref = 1.25 v) ? internal current and thermal limit ? only 10 f for stability ? available in 2% (at 25 c) and 4% in full temperature range ? high supply voltage rejection: ? 80 db typ. (at 25 c) ? temperature range: 0 c to 125 c description the ld1117a is a low drop voltage regulator able to provide up to 1 a of output current, available also in adjustable versions (v ref = 1.25 v). in fixed versions, the following output voltages are offered: 1.2 v, 1.8 v, and 3.3 v. the device is supplied in: sot-223, dpak and to-220. surface mounted packages optimize the thermal characteristics while offering a relevant space saving advantage. high efficiency is assured by an npn pass transistor. only a very common 10 f minimum capacitor is needed for stability. chip trimming allows the regulator to reach a very tight output voltage tolerance, within 2% at 25 c. to-220 sot-223 dpak table 1. device summary order codes output voltage sot-223 dpak to-220 ld1117as12tr ld1117adt12tr 1.2 v ld1117as18tr ld1117adt18tr 1.8 v ld1117as33tr LD1117ADT33tr ld1117av33 3.3 v ld1117astr ld1117adt-tr adjustable from 1.25 v www.st.com
contents ld1117a 2/24 docid7194 rev 26 contents 1 diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7 ld1117a adjustable: application note . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 9 packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 10 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
docid7194 rev 26 3/24 ld1117a diagram 24 1 diagram figure 1. block diagram
pin configuration ld1117a 4/24 docid7194 rev 26 2 pin configuration note: the tab is connected to the v out . figure 2. pin connections (top view) dpak sot-223 to-220 adj/gnd v out 1 v in 2 3 adj/gnd v out 1 v in 2 3 adj/gnd output input
docid7194 rev 26 5/24 ld1117a maximum ratings 24 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. beyond the above suggested max. power dissipation, a short-circuit may permanently damage the device. table 2. absolute maximum ratings symbol parameter value unit v in dc input voltage 15 v p d power dissipation 12 w t stg storage temperature range -40 to +150 c t op operating junction temperature range 0 to +125 c table 3. thermal data symbol parameter sot-223 dpak to-220 unit r thjc thermal resistance junction-case 15 8 5 c/w r thja thermal resistance junction-ambient 110 100 50 c/w
schematic application ld1117a 6/24 docid7194 rev 26 4 schematic application figure 3. application circuit (for fixed output voltages) a
docid7194 rev 26 7/24 ld1117a electrical characteristics 24 5 electrical characteristics refer to the test circuits, t j = 0 to 125 c, c o = 10 f, c i = 10 f, r = 120 between out- gnd, unless otherwise specified. refer to the test circuits, t j = 0 to 125 c, c o = 10 f, c i = 10 f, unless otherwise specified. table 4. electrical characteristics of ld1117a#12 symbol parameter test conditions min. typ. max. unit v o output voltage v i = 5.3 v, i o = 10 ma, t j = 25 c 1.176 1.2 1.224 v v o output voltage i o = 0 to 1 a, v i = 2.75 to 10 v 1.152 1.2 1.248 v v o line regulation v i = 2.75 to 8 v, i o = 0 ma 1 6 mv v o load regulation v i = 2.75 v, i o = 0 to 1 a 1 10 mv v o temperature stability 0.5 % v o long term stability 1000 hrs, t j = 125 c 0.3 % v i operating input voltage i o = 100 ma 10 v i d quiescent current v i 8 v, i o = 0 ma 5 10 ma i o output current v i - v o = 5 v, t j = 25 c 1000 1200 ma en output noise voltage b = 10 hz to 10 khz, t j = 25 c 100 v svr supply voltage rejection i o = 40 ma, f = 120 hz v i - v o = 3 v, v ripple = 1 v pp 60 80 db v d dropout voltage i o = 100 ma 1 1.10 v i o = 500 ma 1.05 1.15 i o = 1 a 1.15 1.30 v o(pwr) thermal regulation t a = 25 c, 30 ms pulse 0.08 0.2 %/w table 5. electrical characteristics of ld1117a#18 symbol parameter test conditions min. typ. max. unit v o output voltage v i = 3.8 v, i o = 10 ma, t j = 25 c 1.764 1.8 1.836 v v o output voltage i o = 0 to 1 a, v i = 3.3 to 8 v 1.728 1.872 v v o line regulation v i = 3.3 to 8 v, i o = 0 ma 1 6 mv v o load regulation v i = 3.3 v, i o = 0 to 1 a 1 10 mv v o temperature stability 0.5 % v o long term stability 1000 hrs, t j = 125 c 0.3 % v i operating input voltage i o = 100 ma 10 v i d quiescent current v i 8 v, i o = 0 ma 5 10 ma i o output current v i - v o = 5 v, t j = 25 c 1000 ma
electrical characteristics ld1117a 8/24 docid7194 rev 26 refer to the test circuits, t j = 0 to 125 c, c o = 10 f, c i = 10 f, unless otherwise specified. refer to the test circuits, t j = 0 to 125 c, c o = 10 f, c i = 10 f, unless otherwise specified. en output noise voltage b = 10 hz to 10 khz, t j = 25 c 100 v svr supply voltage rejection i o = 40 ma, f = 120 hz v i - v o = 3 v, v ripple = 1 v pp 60 80 db v d dropout voltage i o = 100 ma 1 1.10 v i o = 500 ma 1.05 1.15 i o = 1 a 1.15 1.30 v o(pwr) thermal regulation t a = 25 c, 30 ms pulse 0.08 0.2 %/w table 5. electrical characteristics of ld1117a#18 (continued) symbol parameter test conditions min. typ. max. unit table 6. electrical characteristics of ld1117a#33 symbol parameter test conditions min. typ. max. unit v o output voltage v i = 5.3 v, i o = 10 ma, t j = 25 c 3.234 3.3 3.366 v v o output voltage i o = 0 to 1 a, v i = 4.75 to 10 v 3.168 3.432 v v o line regulation v i = 4.75 to 8 v, i o = 0 ma 1 6 mv v o load regulation v i = 4.75 v, i o = 0 to 1 a 1 10 mv v o temperature stability 0.5 % v o long term stability 1000 hrs, t j = 125 c 0.3 % v i operating input voltage i o = 100 ma 10 v i d quiescent current v i 10 v, i o = 0 ma 5 10 ma i o output current v i - v o = 5 v, t j = 25 c 1000 1200 ma en output noise voltage b =10 hz to 10 khz, t j = 25 c 100 v svr supply voltage rejection i o = 40 ma, f = 120 hz v i - v o = 3 v, v ripple = 1 v pp 60 75 db v d dropout voltage i o = 100 ma 1 1.10 v i o = 500 ma 1.05 1.15 i o = 1 a 1.15 1.30 v o(pwr) thermal regulation t a = 25 c, 30 ms pulse 0.08 0.2 %/w table 7. electrical characteristics of ld1117a (adjustable) symbol parameter test conditions min. typ. max. unit v ref reference voltage v i = 5.3 v, i o = 10 ma, t j = 25 c 1.225 1.25 1.275 v v ref reference voltage i o = 10 ma to 1 a, v i = 2.75 to 10 v 1.2 1.3 v v o line regulation v i = 2.75 to 8 v, i o = 0 ma 1 6 mv
docid7194 rev 26 9/24 ld1117a electrical characteristics 24 v o load regulation v i = 2.75 v, i o = 0 to 1 a 1 10 mv v o temperature stability 0.5 % v o long term stability 1000 hrs, t j = 125 c 0.3 % v i operating input voltage i o = 100 ma 10 v i adj adjustment pin current v in 10 v 60 120 a i adj adjustment pin current change v in - v o = 1.4 to 10 v, i o = 10 ma to 1 a 1 5 a i o(min) minimum load current v in = 10 v 2 5 ma i o output current v i - v o = 5 v, t j = 25 c 1000 1200 ma en output noise voltage b =10 hz to 10 khz, t j = 25 c 100 v svr supply voltage rejection i o = 40 ma, f = 120 hz v i - v o = 3 v, v ripple = 1 v pp 60 80 db v d dropout voltage i o = 100 ma 1 1.10 v i o = 500 ma 1.05 1.15 i o = 1 a 1.15 1.30 v o(pwr) thermal regulation t a = 25 c, 30 ms pulse 0.08 0.2 %/w table 7. electrical characteristics of ld1117a (adjustable) (continued) symbol parameter test conditions min. typ. max. unit
typical application ld1117a 10/24 docid7194 rev 26 6 typical application figure 4. negative supply ld1117a v o u t = - v out(nom) figure 5. circuit for increasing output voltage ld1117a v out = v out(nom) + (0 - 5v) figure 6. voltage regulator with reference ld1117a v out = v out(nom) + vz vz
docid7194 rev 26 11/24 ld1117a typical application 24 figure 7. post-regulated dual supply ld1117a v out2 = v out(nom) 0.5 a ld1117a v out1 v out3 = -v out(nom) 0.5 a
ld1117a adjustable: application note ld1117a 12/24 docid7194 rev 26 7 ld1117a adjustable: application note the ld1117a adjustable has a thermal stabilized 1.25 0.012 v reference voltage between the out and adj pins. i adj is 60 a typ. (120 a max.) and i adj is 1 a typ. (5 a max.). r 1 is normally fixed to 120 . from figure 6 the following is obtained: v out = v ref + r 2 (i adj + i r1 ) = v ref + r 2 (i adj +v ref /r 1 ) = v ref (1 + r 2 / r 1 ) + r 2 x i adj . in normal applications the r 2 value is in the range of a few k , so the r 2 x i adj product can not be considered in the v out calculation; the above expression then becomes: v out = v ref (1 + r 2 / r 1 ). in order to have a better load regulation it is important to realize a good kelvin connection of r 1 and r 2 resistors. in particular, the r 1 connection must be realized very close to the out and adj pins, while the r 2 ground connection must be placed as near as possible to the negative load pin. ripple rejection can be improved by introducing a 10 f electrolytic capacitor placed in parallel to the r 2 resistor (see figure 8 ). figure 8. adjustable output voltage application ld1117a figure 9. adjustable output voltage application with improved ripple rejection ld1117a
docid7194 rev 26 13/24 ld1117a package mechanical data 24 8 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 8. to-220 sg (single gauge) mechanical data dim. mm min. typ. max. a 4.40 4.60 b 0.61 0.88 b1 1.14 1.70 c 0.48 0.70 d 15.25 15.75 e 10 10.40 e 2.40 2.70 e1 4.95 5.15 f 0.51 0.60 h1 6.20 6.60 j1 2.40 2.72 l13 14 l1 3.50 3.93 l20 16.40 l30 28.90 ? p 3.75 3.85 q 2.65 2.95
package mechanical data ld1117a 14/24 docid7194 rev 26 figure 10. to-220 sg (single gauge) drawing buhy'
docid7194 rev 26 15/24 ld1117a package mechanical data 24 figure 11. sot-223 mechanical data drawing table 9. sot-223 mechanical data dim. mm min. typ. max. a 1.80 a1 0.02 0.1 b 0.60 0.70 0.85 b1 2.90 3.00 3.15 c 0.24 0.26 0.35 d 6.30 6.50 6.70 e2.30 e1 4.60 e 3.30 3.50 3.70 h 6.70 7.00 7.30 v 10 0046067_m
package mechanical data ld1117a 16/24 docid7194 rev 26 table 10. dpak (to-252) mechanical data dim. mm min. typ. max. a2.20 2.40 a1 0.90 1.10 a2 0.03 0.23 b0.64 0.90 b4 5.20 5.40 c0.45 0.60 c2 0.48 0.60 d6.00 6.20 d1 5.10 e6.40 6.60 e1 4.70 e2.28 e1 4.40 4.60 h 9.35 10.10 l1.00 1.50 (l1) 2.80 l2 0.80 l4 0.60 1.00 r0.20 v2 0 8
docid7194 rev 26 17/24 ld1117a package mechanical data 24 figure 12. dpak (to-252) drawing 0068772_k
package mechanical data ld1117a 18/24 docid7194 rev 26 figure 13. dpak footprint (a) a. all dimensions are in millimeters footprint_rev_k
docid7194 rev 26 19/24 ld1117a packaging mechanical data 24 9 packaging mechanical data figure 14. tape for sot-223 (dimensions are in mm) table 11. sot-223 tape and reel mechanical data tape reel dim. mm dim. mm min. typ. max. min. max. a0 6.75 6.85 6.95 a 180 b0 7.30 7.40 7.50 n 60 k0 1.80 1.90 2.00 w1 12.4 f 5.40 5.50 5.60 w2 18.4 e 1.65 1.75 1.85 w3 11.9 15.4 w 11.7 12 12.3 p2 1.90 2 2.10 base quantity pcs 1000 p0 3.90 4 4.10 bulk quantity pcs 1000 p1 7.90 8 8.10 t 0.25 0.30 0.35 d f 1.50 1.55 1.60 d1 f 1.50 1.60 1.70 * cumulative tolerance of 10 sprocket holes is 0.20 mm
packaging mechanical data ld1117a 20/24 docid7194 rev 26 figure 15. reel for sot-223 (dimensions are in mm)
docid7194 rev 26 21/24 ld1117a packaging mechanical data 24 table 12. dpak tape and reel mechanical data tape reel dim. mm dim. mm min. max. min. max. a0 6.8 7 a 330 b0 10.4 10.6 b 1.5 b1 12.1 c 12.8 13.2 d 1.5 1.6 d 20.2 d1 1.5 g 16.4 18.4 e 1.65 1.85 n 50 f 7.4 7.6 t 22.4 k0 2.55 2.75 p0 3.9 4.1 base qty. 2500 p1 7.9 8.1 bulk qty. 2500 p2 1.9 2.1 r40 t 0.25 0.35 w 15.7 16.3
packaging mechanical data ld1117a 22/24 docid7194 rev 26 figure 16. tape for dpak figure 17. reel for dpak p1 a0 d1 p0 f w e d b0 k0 t user direction of feed p2 10 pitches cumulative tolerance on tape +/- 0.2 mm user direction of feed r bending radius b1 for machine ref. only including draft and radii concentric around b0 am08852v1 top cover tape a d b full radius g measured at hub c n reel dimensions 40mm min. access hole at sl ot location t tape slot in core for tape start 25 mm min. width am08851v2
docid7194 rev 26 23/24 ld1117a revision history 24 10 revision history table 13. document revision history date revision changes 29-sep-2004 11 add new part number. 12-oct-2004 12 mistake v o max. - table 4. 21-apr-2005 13 add new package - d2pak/a. 05-jul-2005 14 the dpak mechanical data updated. 10-feb-2006 15 add new package - d2pak/a (b type). 20-dec-2006 16 change value v in on table 2 . 19-jan-2007 17 d2pak/a mechanical data updated and add footprint data. 28-may-2007 18 add i adj and i adj values on table 7 . 07-jun-2007 19 add i o(min) value on table 7 . 15-apr-2008 20 modified: table 10. 28-jul-2009 21 modified: table 10. 05-jul-2010 22 added: table 8 on page 15 , figure 14 on page 18 , figure 15 on page 20 , figure 16 and figure 17 on page 21 . 16-nov-2010 23 modified: table 1 on page 1 , r thjc value for to-220 table 3 on page 5 . 16-dec-2011 24 modified: v o parameter output voltage ==> reference voltage table 7 on page 8 . 19-oct-2012 25 added: r thja value for dpak and sot-223 table 3 on page 5 . 24-jul-2013 26 part numbers ld1117axx12, ld1117axx18, ld1117axx33, ld1117axx changed to ld1117a. modified chapter 6: typical application . changed vo symbol in to v ref in table 7: electrical characteristics of ld1117a (adjustable) . updated chapter 8: package mechanical data . added chapter 9: packaging mechanical data . minor text changes.
ld1117a 24/24 docid7194 rev 26 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. st products are not authorized for use in weapons. nor are st products designed or authorized for use in: (a) safety critical applications such as life supporting, active implanted devices or systems with product functional safety requirements; (b) aeronautic applications; (c) automotive applications or environments, and/or (d) aerospace applications or environments. where st products are not designed for such use, the purchaser shall use products at purchaser?s sole risk, even if st has been informed in writing of such usage, unless a product is expressly designated by st as being intended for ?automotive, automotive safety or medical? industry domains according to st product design specifications. products formally escc, qml or jan qualified are deemed suitable for use in aerospace by the corresponding governmental agency. resale of st products with provisions different from the statem ents 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 - swed en - switzerland - united kingdom - united states of america www.st.com

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