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this is information on a product in full production. may 2014 docid14414 rev 9 1/24 ST715 high input voltage, 85 ma ldo linear regulator datasheet - production data features ? 2.5 v to 24 v input voltage ? low-dropout voltage (500 mv typ. at 85 ma) ? very low quiescent current (3.8 a typ. at full load) ? 85 ma guaranteed output current ? output voltages available on request: from 1.2 v to 5.0 v with 100 mv step and adjustable ? compatible with ceramic output capacitors from 0.47 f to 10 f ? internal current limit ? packages: sot23-5l, sot323-5l and dfn8 (3x3 mm) ? temperature range: from -40 c to 125 c applications ? mobile phones ? personal digital assistant (pdas) ? cordless phones and similar battery-powered systems description the ST715 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 2.5 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 3.8 a at full load makes it highly suitable for low power applications and battery-powered systems. the wide input voltage range makes the ST715 an ideal solution for low power industrial applications. the ST715 is available in sot23-5, sot323-5l or dfn8 (3x3 mm) 8 leads. sot23-5l dfn8 (3x3 mm) sot323-5l table 1. device summary order codes output voltage sot23-5l marking sot323-5l marking dfn8 (3x3 mm) marking ST715mr 71ad ST715pur 715ad adj ST715m25r 7125 ST715pu25r 71525 2.5 v ST715m33r 7133 ST715c33r 733 ST715pu33r 71533 3.3 v www.st.com
contents ST715 2/24 docid14414 rev 9 contents 1 diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 output voltage selection for adjustable version . . . . . . . . . . . . . . . . . . 8 5.1 external capacitor requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.2 power dissipation and junction temperature . . . . . . . . . . . . . . . . . . . . . . . 8 6 typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7 typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 8 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 9 packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 10 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
docid14414 rev 9 3/24 ST715 diagram 24 1 diagram figure 1. block diagram (fixed version) figure 2. block diagra m (adjustable version) 9 ,1 *1' 9 287 23$03 %ldv jhqhudwru %dqgjds uhihuhqfh &xuuhqw olplw 7khupdo surwhfwlrq 9 ,1 *1' 9 287 23$03 %ldv jhqhudwru %dqgjds uhihuhqfh &xuuhqw olplw 7khupdo surwhfwlrq )%
pin configuration ST715 4/24 docid14414 rev 9 2 pin configuration figure 3. pin connection (top view) table 2. pin description (dfn8 3x3 mm) symbol pin for fixed pin for adjustable name and function in 1 1 input voltage nc 2, 3, 5, 7, exp. pad 2, 3, 6, 7, exp. pad not internally connected gnd 4 4 common ground fb - 5 feedback pin out 8 8 output voltage table 3. pin description (sot23-5l/sot323-5l) symbol pin for fixed pin for adjustable name and function in 4 4 input voltage nc 3 1, 3 not internally connected gnd 2 2 common ground fb 1 - feedback pin out 5 5 output voltage sot23-5l/sot323-5l dfn8 (3x3)
docid14414 rev 9 5/24 ST715 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 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 fb feedback pin 4 v i out continuous output current according to package power dissipation a p d (1) 1. p d is based on an operating temperature of 25 c or less. it must be derated according to the operating temperature. maximum power dissipation, dfn package 2 w maximum power dissipation, sot23-5l and sot323-5l packages 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 sot323-5l dfn8 unit r thja thermal resistance junction-ambient 195 245 52 c/w
electrical characteristics ST715 6/24 docid14414 rev 9 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 - adjustable version symbol parameter test conditions min. typ. max. unit v in operating input voltage i out = 85 ma 2.5 24 v i out output current v in = 2.5 to 6 v, t j = -40 c to 125 c 85 ma v fb feedback voltage 1.2 v v fb accuracy (1) v in = v out + 1 to 24 v, i out =1 ma to 85 ma, t j = -40 c to 125 c -4.0 4.0 % v out line regulation v in = v out +1 to 24 v, i out = 1 ma, t j = -40 c to 125 c 0.001 0.004 %/v v out load regulation i out = 1 ma to 85 ma, t j = -40 c to 125 c 0.002 0.004 %/ma e n output noise voltage (2) 200 hz to 100 khz, i out = 50 ma, c out = 10 f, t j = -40 c to 125 c, v out = 1.2 v 95 v rms svr supply voltage rejection v in = v outnom +1 v+/- v ripple, v ripple = 0.2 v, i out = 1 ma, c out = 10 f f = 1 khz 45 db t j = -40 c to 125 c f = 100 khz 62 i q quiescent current i out = 0 ma to 85 ma, t j = -40 c to 125 c 4.5 a i out = 0 ma to 85 ma, v in = 24 v t j = -40 c to 125 c 5.5 i sc short-circuit current v out = 0, t j = -40 c to 125 c v in = 3.8 v 120 ma t on turn-on time (3) v in = 4.2 v, c out = 10 f, i out = 60 ma, t j = -40 c to 125 c 0.7 ms c out output capacitor capacitance f = 100 khz 0.47 f 1. for v out(nom) < 2 v, v in = 2.5 v. 2. guaranteed by design. 3. turn-on time is time measured between the input just exceeding 90% of its final value and the output voltage just reaching 95% of its nominal value.
docid14414 rev 9 7/24 ST715 electrical characteristics 24 t j = 25 c, v in = v out(nom) + 1 v, c in = 0.1 f, c out = 1 f, i out = 1 ma, v out = 3.3 v unless otherwise specified. (1) table 7. electrical characteristics - fixed version symbol parameter test conditions min. typ. max. unit v in operating input voltage i out = 85 ma, t j = -40 c to 125 c v out +v dro ptyp 24 v i out output current v in = 4.3 to 24 v, t j = -40 c to 125 c 0 85 ma v out v out total accuracy (1) v in = v out +1 to 24 v, i out = 0 to 85 ma, t j = -40 c to 125 c -5 +5 % v out line regulation v in = 4.3 to 24 v, i out = 1 ma, t j = -40 c to 125 c 0.001 0.004 %/v v out load regulation i out =100 a to 85 ma, t j = -40 c to 125 c 0.002 0.003 %/ma v drop dropout voltage (2) i out = 85 ma, t j = -40 c to 125 c 500 1000 mv e n output noise voltage (3) 200 hz to 100 khz, i out = 50 ma, c out = 10 f, t j = -40 c to 125 c 210 v rms svr supply voltage rejection v in = v outnom +1 v+/- v ripple, v ripple = 0.2 v, i out = 1 ma, c out = 10 f f = 1 khz 38 db t j = -40 c to 125 c f = 100 khz 57 i q quiescent current i out =0 ma to 85 ma, t j = -40 c to 125 c 3.75 4.5 a v in =24 v 4.15 5.5 i sc short-circuit current v out = 0, t j =-40 c to 125 c v in = 3.8 v 120 ma t on turn-on time (4) v in = 4.2 v, c out = 10 f, i out = 60 ma, t j = -40 c to 125 c 0.7 ms c out output capacitor capacitance f = 100 khz 0.47 f 1. for v out(nom) < 2 v, v in = 2.5 v. 2. dropout voltage is the input-to-output voltage difference at whic h the output voltage is 100 mv below its nominal value. this specification does not apply to output voltages below 2 v. 3. guaranteed by design. 4. turn-on time is time measured between the input just exceeding 90% of its final value and the output voltage just reaching 95% of its nominal value.
output voltage selection for adjustable version ST715 8/24 docid14414 rev 9 5 output voltage selection for adjustable version the ST715 features an adjustable output voltage due to two external resistors connected as a voltage divider to the fb pin as shown in figure 4 . the output voltage is set by the following equation: equation 1 v out = v fb (1 + r 1 /r 2 ) where typically v fb = 1.2 v. choose r 2 5 k to optimize the quiescent current, accuracy, and high-frequency power supply rejection. the resistor selection is given by the following equation: equation 2 r 1 = r 2 x (v out /v fb - 1) 5.1 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 ST715 requires an output capacitor connected between out and gnd to stabilize the internal control loop. any capacitor, (including ceramic and tantalum) with a value higher than 0.47 f, stabilizes this loop. 5.2 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 3 p d(max) = (t jmax - t a ) / r thja 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:
docid14414 rev 9 9/24 ST715 output voltage selection for adjustable version 24 equation 4 p d = (v in - v out ) x i out 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.
typical application ST715 10/24 docid14414 rev 9 6 typical application figure 4. application circuit for fixed version figure 5. application circuit for adjustable version
docid14414 rev 9 11/24 ST715 typical performance characteristics 24 7 typical performance characteristics figure 6. output voltage vs. temperature figure 7. output voltage vs. input voltage figure 8. dropout voltage vs. output current figure 9. c out stability region figure 10. supply voltage rejection vs. frequency figure 11. 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 -50050100150 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 -50050100150 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] 0 200 400 600 800 1000 020406080100 i out [a] v dropout [v] 0 200 400 600 800 1000 020406080100 i out [a] v dropout [v] c in =0.1f, v in =v en =2.5 to 24v i out =1ma to 0.085a 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 0.47 1 4.7 10 c out [f] (nominal value) esr @ 100 khz [ohm] stability region c in =0.1f, v in =v en =2.5 to 24v i out =1ma to 0.085a 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 0.47 1 4.7 10 c out [f] (nominal value) esr @ 100 khz [ohm] stability region i out =1ma, v ripple =0.2v pp , v out =1.2v 30 35 40 45 50 55 60 100 1000 10000 100000 freq [hz] svr [db] i out =1ma, v ripple =0.2v pp , v out =1.2v 30 35 40 45 50 55 60 100 1000 10000 100000 freq [hz] svr [db] i out =50ma, v in =2.5v, v out =1.2v 0 100 200 300 400 500 600 700 1000 10000 100000 freq [hz] nv/ hz] i out =50ma, v in =2.5v, v out =1.2v 0 100 200 300 400 500 600 700 1000 10000 100000 freq [hz] nv/ hz]
typical performance characteristics ST715 12/24 docid14414 rev 9 figure 12. quiescent current vs. input voltage figure 13. load transient c in =c out =1f, v en =v in =24v i out =from 1ma to 85ma t r =t f =5s figure 14. line transient figure 15. 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 v in =v inh , i out =1ma, v out =3.3v 0 1 2 3 4 5 0 5 10 15 20 25 v in [v] iq [a] v in =v inh , i out =1ma, v out =3.3v 0 1 2 3 4 5 0 5 10 15 20 25 v in [v] iq [a]
docid14414 rev 9 13/24 ST715 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. figure 16. sot23-5l drawing bn
package mechanical data ST715 14/24 docid14414 rev 9 figure 17. sot23-5l recommended footprint (dimensions in mm) table 8. 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 c2.09 0.20 d2.95 e1.60 e0.95 h2.80 l0.30 0.60 08 bn
docid14414 rev 9 15/24 ST715 package mechanical data 24 figure 18. sot323-5l drawing bi
package mechanical data ST715 16/24 docid14414 rev 9 table 9. sot323-5l mechanical data dim. mm min. typ. max. a0.80 1.10 a1 0 0.10 a2 0.80 0.90 1 b0.15 0.30 c0.10 0.22 d 1.80 2 2.20 e 1.80 2.10 2.40 e1 1.15 1.25 1.35 e0.65 e1 1.30 l 0.26 0.36 0.46 < 0 8
docid14414 rev 9 17/24 ST715 package mechanical data 24 figure 19. dfn8 (3x3 mm) drawing @uzqf"@sfw$
package mechanical data ST715 18/24 docid14414 rev 9 table 10. 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 3.15 d2 1.603 1.753 1.853 e 2.85 3 3.15 e2 1.345 1.495 1.595 e0.65 l 0.30 0.40 0.50
docid14414 rev 9 19/24 ST715 package mechanical data 24 figure 20. dfn8 (3x3 mm) recommended footprint @uzqf"@sfw$
packaging mechanical data ST715 20/24 docid14414 rev 9 9 packaging mechanical data figure 21. tape and reel sot23-5l drawing
docid14414 rev 9 21/24 ST715 packaging mechanical data 24 table 11. 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 table 12. sot323-xl tape and reel mechanical data dim. mm min. typ. max. a 175 180 185 c12.81313.2 d20.2 n59.56060.5 t 14.4 ao 2.25 bo 3.17 ko 1.2 po 3.9 4.0 4.1 p 3.9 4.0 4.2
packaging mechanical data ST715 22/24 docid14414 rev 9 table 13. 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
docid14414 rev 9 23/24 ST715 revision history 24 10 revision history table 14. document revision history date revision changes 08-feb-2008 1 initial release. 19-feb-2008 2 modified: features on page 1 . 22-sep-2008 3 modified: dfn8 (3x3 mm) mechanical data 10 on page 23 . 26-nov-2008 4 modified: section 5 on page 8 . 24-mar-2010 5 modified: table 4 on page 5 . 24-mar-2010 6 modified: i q max values table 6 on page 6 and table 7 on page 7 . 20-may-2010 7 modified: table 2 and table 3 on page 4 . 28-jan-2014 8 part numbers ST715xx, ST715xx25, ST715xx33 changed to ST715. added package dfn8 (3 x 3 mm). updated the title, the features and the description in cover page. updated section 1: diagram , section 2: pin configuration , section 3: maximum ratings , section 4: electrical characteristics and section 8: package mechanical data . added section 9: packaging mechanical data . minor text changes. 21-may-2014 9 updated section 8: package mechanical data . minor text changes.
ST715 24/24 docid14414 rev 9 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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