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this is information on a product in full production. july 2014 docid026678 rev 1 1/18 LDK715 high input voltage 85 ma ldo linear regulator datasheet - production data features ? 4.3 v to 24 v input voltage ? low-dropout voltage (500 mv typ. at 85 ma) ? very low quiescent current (5 a typ. at full load) ? 85 ma guaranteed output current ? output voltages 3.3v, 4.2v and 5.0v (other versions available on request) ? compatible with ceramic output capacitors from 0.47 f to 10 f ? internal current limit ? packages: sot23-5l,and dfn8 (3x3 mm) ? temperature range: from -40 c to 125 c applications ? mobile phones ? industrial ? battery-powered systems description the LDK715 is a high voltage, ultra low quiescent current and low drop linear regulator capable of providing an output current in excess of 85 ma. the device operates over an input voltage range from 4.3 v to 24 v, and it is stable with output ceramic capacitors. fault condition protection includes short-circuit current limitation. the ultra low quiescent current of 5 a at full load makes it highly suitable for low power applications and battery-powered systems. the wide input voltage range makes the LDK715 an ideal solution for low power industrial applications. the LDK715 is available in sot23-5, or dfn8 (3x3 mm) 8 leads. ')1[pp 627/ table 1. device summary order codes output voltage sot23-5l dfn8 (3x3 mm) LDK715m33r (1) LDK715pu33r (1) 3.3 v LDK715m42r LDK715pu42r (1) 4.2 v LDK715m50r LDK715pu50r (1) 5.0 v 1. available on request www.st.com
contents LDK715 2/18 docid026678 rev 1 contents 1 diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4.1 external capacitor requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.2 power dissipation and junction temperature . . . . . . . . . . . . . . . . . . . . . . . 7 5 typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7.1 sot23-5l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 7.2 dfn8 (3x3 mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 8 packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 8.1 tape and reel sot23-5l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 9 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
docid026678 rev 1 3/18 LDK715 diagram 18 1 diagram figure 1. block diagram 9 ,1 *1' 9 287 23$03 %ldv jhqhudwru %dqgjds uhihuhqfh &xuuhqw olplw 7khupdo surwhfwlrq
pin configuration LDK715 4/18 docid026678 rev 1 2 pin configuration figure 2. pin connection (top view) table 2. pin description for dfn8 (3x3 mm) symbol pin f name and function in 1 input voltage nc 2, 3, 5,6, 7, and exp. pad not internally connected gnd 4 common ground out 8 output voltage table 3. pin description for sot23-5l symbol pin for fixed name and function in 4 input voltage nc 1.3 not internally connected gnd 2 common ground out 5 output voltage ')1[ 627/
docid026678 rev 1 5/18 LDK715 maximum ratings 18 3 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. table 4. absolute maximum ratings symbol parameter value unit v in dc input voltage from -0.3 to 26 v v out dc output voltage from -0.3 to v in +0.3 v i out continuous output current according to package power dissipation a p d (1)(2) 1. p d is based on an operating temperature of 25 c or less. it must be derated according to the operating temperature. 2. the LDK715 has an internal costant current limit feature. take care not to exceed the power dissipation ratings of the package also during current limit and short circuit events. maximum power dissipation, dfn package 2 w maximum power dissipation, sot23-5l package 0.45 t stg storage temperature range -65 to 150 c t op operating junction temperature range -40 to 125 c table 5. thermal data symbol parameter sot23-5l dfn8 unit r thja thermal resistance junction-ambient 195 52 c/w
electrical characteristics LDK715 6/18 docid026678 rev 1 4 electrical characteristics t j = 25 c, v in = v out(nom) + 1 v, c in = 0.1 f, c out = 1 f, i out = 1 ma, unless otherwise specified.(1) table 6. electrical characteristics symbol parameter test conditions min. typ. max. unit v in operating input voltage i out = 85ma, t j = -40c to 125c 4.3 24 v i out output current v in = v out(nom) +1 to 24v, t j = -40c to 125c 085ma v out v out accuracy (1) t j = 25c -1 +1 % v in = v out(nom) +1 to 24v, t j = - 40c to 125c -2 +2 ? vout line regulation v in = v out(nom) +1 to 24v to 24v, i out =1ma,t j = -40c to 125c 0.001 0.004 %/v ? vout load regulation i out = 100a to 85ma, t j = -40c to 125c 0.002 0.003 %/ma v drop drop output voltage (2) i out = 85ma, t j = -40c to 125c 500 1000 mv e n output noise voltage (3) 200 hz to 100khz, i out = 50ma, c out = 10f, t j =-40c to 125c 210 v rms svr supply voltage rejection v in = v out(nom) +1v+/- v ripple, v ripple = 0.2v, i out = 1ma, c out = 10f f =1khz 38 db t j = -40c to 125c f =100khz 57 i q quiescent current i out = 0ma to 85ma, t j = -40c to 125c 57 a v in = 24v 8.5 i sc short circuit current v out = 0, t j = -40c to 125c v in = v out(nom) +1 to 24v 120 ma t on turn on time (4) v in = v out(nom) +1 to 24v, c out = 10f, i out = 60ma, t j = -40c to 125c 0.7 ms c out output capacitor capacitance f = 100khz 0.47 f 1. for v out(nom) < 3.3v, v in = 4.3v. 2. dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mv below its nominal value. 3. guaranteed by design. 4. turn-on time is time measured between the input just exc eeding 90 % of its final value and the output voltage just reaching 95% of its nominal value.
docid026678 rev 1 7/18 LDK715 electrical characteristics 18 4.1 external capacitor requirements a 0.1 f or a larger input bypass capacitor, connected between in and gnd and located close to the device, is recommended. in this manner, the transient response and noise rejection of the power supply, as a whole, improve. a higher value of the input capacitor may be necessary if large, fast-rise-time load transients are present in the application and if the device is several inches far from the power source. the LDK715 requires an output capacitor connected between out and gnd to stabilize the internal control loop. please refer to figure 7. for the allowable output capacitance and esr combinations. 4.2 power dissipation and junction temperature for a reliable operation, junction temperature should not exceed 125 c. this limits the power dissipation the regulator can handle in any application. to guarantee that the junction temperature is within acceptable limits, calculate the maximum allowable dissipation, p d(max) , and the dissipation, p d , which must be less than or equal to p d(max) . the maximum power dissipation limit is given by the following equation: equation 1 where: t jmax is the maximum allowable junction temperature r thja is the thermal resistance junction-to-ambient for the package t a is the ambient temperature the regulator dissipation is calculated by the following equation: equation 2 power dissipation coming from quiescent current is negligible. the st715 features the internal current limit. during normal operation, it limits the output current to approximately 350 ma. when the current limit engages, the output voltage scales back linearly until the overcurrent condition ends. do not exceed the power dissipation ratings of the package. p dmax () t jmax t a ? () r thja ? = p d v in v out ? () i out =
typical application LDK715 8/18 docid026678 rev 1 5 typical application figure 3. application circuit
docid026678 rev 1 9/18 LDK715 typical performance characteristics 18 6 typical performance characteristics figure 4. output voltage vs. temperature figure 5. output voltage vs. input voltage figure 6. dropout voltage vs. output current figure 7. c out stability region figure 8. supply voltage rejection vs. frequency figure 9. output noise voltage vs. frequency v in =v out(nom) +1v 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 -50 0 50 100 150 temp [c] v out [v] i out =1ma i out =85ma v in =v out(nom) +1v 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 -50 0 50 100 150 temp [c] v out [v] i out =1ma i out =85ma v in =v out(nom) +1v 0 0.5 1 1.5 2 2.5 3 3.5 0123456 v in [v] v out [v] v in =v out(nom) +1v 0 0.5 1 1.5 2 2.5 3 3.5 0123456 v in [v] v out [v] , 7 7 8 28 2 @ @ $ >$ > 9 9 7 7 8 2 8 2 3 2 3 2 5 5 ' ' @ p9 > 9 ,1 iurpwr9, 287 p$wrp$& ,1 ?)7d ?& ^z?<,?o? khd ?r&?~v}u]voo 6wdelolw\duhd 8qwhvwhgduhd *,3*59 gipg240420141208rv gipg240420141406rv
typical performance characteristics LDK715 10/18 docid026678 rev 1 figure 10. quiescent current vs. input voltage figure 11. load transient c in =c out =1f, v en =v in =24v i out =from 1ma to 85ma t r =t f =5s figure 12. line transient figure 13. enable transient c out =1f; v in =v en =from 4.3 to 22v; i out =1ma; t r =t f =5s c in = c out =1f, v en =v in =0 to 4.3v, i out =1ma *,3*59
docid026678 rev 1 11/18 LDK715 package mechanical data 18 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. 7.1 sot23-5l figure 14. sot23-5l mechanical drawings bn
package mechanical data LDK715 12/18 docid026678 rev 1 figure 15. sot23-5l recommended footprint (dimensions in mm) table 7. sot23-5l mechanical data dim. mm min. typ. max. a0.90 1.45 a1 0 0.15 a2 0.90 1.30 b0.30 0.50 c 0.009 0.20 d 2.80 2.95 3.05 e 1.50 1.60 1.75 e0.95 h 2.60 2.80 3.00 l0.30 0.60 q0 8 bn
docid026678 rev 1 13/18 LDK715 package mechanical data 18 7.2 dfn8 (3x3 mm) figure 16. dfn8 (3x3 mm) mechanical drawings @uzqf"@sfw$
package mechanical data LDK715 14/18 docid026678 rev 1 figure 17. dfn8 (3x3 mm) recommended footprint table 8. dfn8 (3x3 mm) mechanical data dim mm. min typ max. a 0.80 0.90 1.00 a1 0 0.02 0.05 a3 0.20 b 0.25 0.30 0.35 d 2.85 3.00 3.15 d2 1.603 1.753 1.853 e 2.85 3.00 3.15 e2 1.345 1.495 1.595 e00.65 l 0.30 0.40 0.50 @uzqf"@sfw$
docid026678 rev 1 15/18 LDK715 packaging mechanical data 18 8 packaging mechanical data 8.1 tape and reel sot23-5l figure 18. sot23-5l and dfn8(3x3) tape and reel drawing table 9. sot23-5l tape and reel mechanical data dim. mm min. typ. max. a 180 c 12.8 13.0 13.2 d20.2 n60 t 14.4 ao 3.13 3.23 3.33 bo 3.07 3.17 3.27 ko 1.27 1.37 1.47 po 3.9 4.0 4.1 p 3.9 4.0 4.1
packaging mechanical data LDK715 16/18 docid026678 rev 1 table 10. dfn8 (3x3 mm) tape and reel mechanical data dim. mm min. typ. max. a 180 c12.8 13.2 d20.2 n60 t 14.4 ao 3.3 bo 3.3 ko 1.1 po 4 p8
docid026678 rev 1 17/18 LDK715 revision history 18 9 revision history table 11. document revision history date revision changes 09-jul-2014 1 initial release.
LDK715 18/18 docid026678 rev 1 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 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. ? 2014 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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