View LDS3985XX15_6876033.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

july 2010 doc id 11039 rev 7 1/20 20 lds3985xx ultra low drop-low noise bicmos 300 ma voltage regulator for use with very low esr output capacitor features input voltage from 2.5 v to 6 v stable with low esr ceramic capacitors ultra low dropout voltage (150 mv typ. at 300 ma load, 0.4 mv typ. at 1 ma load) very low quiescent current (85 a typ. at no load, 200 a typ. at 300 ma load; max 1.5 a in off mode) guaranteed output current up to 300 ma wide range of output voltage: ? from 1.25 v to 5.0 v fast turn-on time: typ. 240 s ?[c o = 2.2 f, c byp = 33 nf and i o = 1 ma] logic-controlled electronic shutdown internal current and thermal limit output low noise voltage 30 v rms over 10 hz to 100 khz svr of 55 db at 1 khz, 50 db at 10 khz temperature range: - 40 c to 125 c description the lds3985xx provides up to 300 ma, from 2.5 v to 6 v input voltage. it is stable with ceramic and high quality tantalum capacitor. the ultra low drop voltage, low quiescent current and low noise makes it suitable for low power applications and in battery powered systems. regulator ground current increa ses only slightly in dropout, further prolonging the battery life. shutdown logic control function is available, this means that when the device is used as local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. typical applications are in mobile phone and similar battery powered wireless systems, portable information appliances. dfn6 sot23-5l table 1. device summary part numbers output voltages LDS3985XX15 1.5 v lds3985xx18 1.8 v lds3985xx25 2.5 v lds3985xx28 2.8 v lds3985xx30 3.0 v lds3985xx33 3.3 v lds3985xx50 5.0 v www.st.com
contents lds3985xx 2/20 doc id 11039 rev 7 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8 order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 9 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
lds3985xx diagram doc id 11039 rev 7 3/20 1 diagram figure 1. schematic diagram
pin configuration lds3985xx 4/20 doc id 11039 rev 7 2 pin configuration figure 2. pin connections (top view for sot23-5l, top through view for dfn6) dfn6 sot23-5l table 2. pin description pin n for sot23-5l pin n for dfn6 symbol name and function 11v i input voltage of the ldo 2 5 gnd common ground 36v inh inhibit input voltage: on mode when v inh 1.2 v, off mode when v inh 0.4 v (do not leave floating, not internally pulled down/up) 4 4 bypass bypass pin: connect an external capacitor (usually 10 nf) to minimize noise voltage 53v o output voltage of the ldo - 2 n.c. not connect
lds3985xx typical application doc id 11039 rev 7 5/20 3 typical application figure 3. typical application circuit
maximum ratings lds3985xx 6/20 doc id 11039 rev 7 4 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 3. absolute maximum ratings symbol parameter value unit v i dc input voltage -0.3 to 6 (1) 1. the input pin is able to withstand non repetitive spike of 6.5 v for 200 ms. v v o dc output voltage -0.3 to v i +0.3 v v inh inhibit input voltage -0.3 to v i +0.3 v i o output current internally limited p d power dissipation internally limited 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 dfn6 unit r thjc thermal resistance junction-case 81 10 c/w r thja thermal resistance junction-ambient 255 55 c/w
lds3985xx electrical characteristics doc id 11039 rev 7 7/20 5 electrical characteristics t j = 25 c, v i = v o(nom) + 0.5 v, c i = 1 f, c o = 2.2 f, c byp = 33 nf, i o = 1 ma, v inh = 1.4 v, unless otherwise specified. table 5. electrical characteristics for lds3985xx symbol parameter test conditions min. typ. max. unit v i operating input voltage 2.5 6 v v o output voltage < 2.5 v i o = 1 ma -50 50 mv t j = - 40 to 125 c -75 75 v o output voltage 2.5 v i o = 1 ma -2 2 % of v o(nom) t j = - 40 to 125 c -3 3 v o line regulation (1) v i = v o(nom) + 0.5 to 6 v, t j = - 40 to 125 c -0.1 0.1 %/v v o = 4.7 to 5 v -0.19 0.19 v o load regulation i o = 1 ma to 300 ma, v o 2.5 v t j = - 40 to 125 c 0.005 0.01 %/ma v o load regulation i o = 1 ma to 300 ma, v o 2.5 v t j = - 40 to 125 c 0.0008 0.004 %/ma v o output ac line regulation (2) v i = v o(nom) + 1 v, i o = 300 ma, t r = t f = 30 s 5mv pp i q quiescent current on mode: v inh = 1.24 v i o = 0 85 a i o = 0, t j = - 40 to 125 c 150 i o = 0 to 300 ma 200 i o = 0 to 300 ma, t j = - 40 to 125 c 300 off mode: v inh = 0.4 v 0.003 t j = - 40 to 125 c 1.5 v drop dropout voltage (3) i o = 1 ma 0.4 mv i o = 1 ma, t j = -40 to 125 c 2 i o = 150 ma 60 i o = 150 ma, t j = - 40 to 125 c 100 i o = 300 ma 150 i o = 300 ma, t j = - 40 to 125 c 250 i sc short circuit current r l = 0 600 ma svr supply voltage rejection v i = v o(nom) +0.25 v v ripple = 0.1 v, i o = 50 ma for v o(nom) < 2.5 v, v i = 2.55 v f = 1 khz 55 db f = 10 khz 50 i o(pk) peak output current v o v o(nom) - 5 % 300 550 ma
electrical characteristics lds3985xx 8/20 doc id 11039 rev 7 v inh inhibit input logic low v i = 2.5 v to 6 v, t j = - 40 to 125 c 0.4 v inhibit input logic high 1.4 i inh inhibit input current v inh = 0.4 v, v i = 6 v 1 na en output noise voltage b w = 10 hz to 100 khz, c o = 2.2 f 30 v rms t on turn on time (4) c byp = 33 nf 240 s t shdn thermal shutdown (5) 160 c c o output capacitor capacitance 2.2 22 f esr 5 5000 m 1. for v o(nom) < 2 v, v i = 2.5 v 2. for v o(nom) = 1.25 v, v i = 2.5 v 3. dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mv below its nominal value. this specification does not apply fo r input voltages below 2.5 v 4. turn-on time is time measured bet ween the enable input just exceeding v inh high value and the output voltage just reaching 95 % of its nominal value 5. typical thermal protec tion hysteresis is 20 c table 5. electrical characteristics for lds3985xx (continued) symbol parameter test conditions min. typ. max. unit
lds3985xx typical performance characteristics doc id 11039 rev 7 9/20 6 typical performance characteristics t j = 25 c, v i = v o(nom) + 0.5 v, c i = 1 f, c o = 2.2 f, c byp = 33 nf, i o = 1 ma, v inh = 1.4 v, unless otherwise specified. figure 4. output voltage vs. temp. (v i = 2.5 v) figure 5. output voltage vs. temp. (v i = 3.2 v) figure 6. output voltage vs. temp. (v i = 3.8 v) figure 7. shutdown voltage vs. temperature (v o = 1.35 v) figure 8. shutdown voltage vs. temperature (v o = 3.3 v) figure 9. line regulation vs. temperature (v i = 2.5 v to 6 v)
typical performance characteristics lds3985xx 10/20 doc id 11039 rev 7 figure 10. line regulation vs. temperature (v i = 3.2 v to 6 v) figure 11. line regulation vs. temperature (v i = 3.8 v to 6 v) figure 12. quiescent current vs. temperature (v i = 2.5 v) figure 13. quiescent current vs. temperature (v i = 6 v) figure 14. quiescent current vs. temperature (v i = 3.4 v) figure 15. supply voltage rejection vs. frequency
lds3985xx typical performance characteristics doc id 11039 rev 7 11/20 figure 16. dropout voltage vs. temperature figure 17. dropout voltage vs. output current figure 18. inhibit transient v i = 5 v, i o = 1 ma, v inh = 0 to 1.2 v, c i = c o = 1 f (cer), c byp = 10 nf, t r = t f = 1 s
package mechanical data lds3985xx 12/20 doc id 11039 rev 7 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.
lds3985xx package mechanical data doc id 11039 rev 7 13/20 dim. mm. mil s . min. typ. max. min. typ. max. a0. 9 0 1.45 3 5.4 57.1 a1 0.00 0.10 0.0 3 . 9 a2 0. 9 01. 3 0 3 5.4 51.2 b 0. 3 5 0.50 1 3 .7 1 9 .7 c0.0 9 0.20 3 .5 7. 8 d2. 8 0 3 .00 110.2 11 8 .1 e 1.50 1.75 5 9 .0 6 8 . 8 e0. 9 5 3 7.4 h 2.60 3 .00 102. 3 11 8 .1 l 0.10 0.60 3 . 9 2 3 .6 s ot2 3 -5l mechanical data 704 9 676d
package mechanical data lds3985xx 14/20 doc id 11039 rev 7 dim. mm. inch. min. typ. max. min. typ. max. a0. 8 00. 9 0 1.00 0.0 3 1 0.0 3 5 0.0 39 a1 0 0.02 0.05 0 0.001 0.002 a 3 0.20 0.00 8 b 0.2 3 0. 3 00. 38 0.00 9 0.012 0.015 d2. 9 0 3 .00 3 .10 0.114 0.11 8 0.122 d2 2.2 3 2. 38 2.4 8 0.0 88 0.0 9 4 0.0 98 e2. 9 0 3 .00 3 .10 0.114 0.11 8 0.122 e2 1.50 1.65 1.75 0.05 9 0.065 0.06 9 e0. 9 50.0 3 7 l0. 3 0 0.40 0.50 0.012 0.016 0.020 dfn6 ( 3 x 3 mm) mechanical data 7 9 466 3 7a
lds3985xx package mechanical data doc id 11039 rev 7 15/20 dim. mm. inch. min. typ. max. min. typ. max. a0. 8 0 1.00 0.0 3 1 0.0 39 a1 0 0.02 0.05 0 0.001 0.002 a 3 0.20 0.00 8 b 0.2 3 0.45 0.00 9 0.01 8 d2. 9 0 3 .00 3 .10 0.114 0.11 8 0.122 d2 2.2 3 2.50 0.0 88 0.0 98 e2. 9 0 3 .00 3 .10 0.114 0.11 8 0.122 e2 1.50 1.75 0.05 9 0.06 9 e0. 9 50.0 3 7 l0. 3 0 0.40 0.50 0.012 0.016 0.020 dfn6d ( 3 x 3 mm) mechanical data 7 9 466 3 7b
package mechanical data lds3985xx 16/20 doc id 11039 rev 7 dim. mm. inch. min. typ. max. min. typ. max. a1 8 0 7.0 8 6 c 12. 8 1 3 .0 1 3 .2 0.504 0.512 0.51 9 d 20.2 0.7 9 5 n60 2. 3 62 t 14.4 0.567 ao 3 .1 33 .2 33 . 33 0.12 3 0.127 0.1 3 1 bo 3 .07 3 .17 3 .27 0.120 0.124 0.12 8 ko 1.27 1. 3 7 1.47 0.050 0.054 0.0.5 8 po 3 . 9 4.0 4.1 0.15 3 0.157 0.161 p 3 . 9 4.0 4.1 0.15 3 0.157 0.161 tape & reel s ot2 3 -xl mechanical data
lds3985xx package mechanical data doc id 11039 rev 7 17/20 dim. mm. inch. min. typ. max. min. typ. max. a1 8 0 7.0 8 7 c 12. 8 1 3 .2 0.504 0.51 9 d 20.2 0.7 9 5 n60 2. 3 62 t 14.4 0.567 ao 3 . 3 0.1 3 0 bo 3 . 3 0.1 3 0 ko 1.1 0.04 3 po 4 0.157 p 8 0. 3 15 tape & reel qfnxx/dfnxx ( 3 x 3 ) mechanical data
order codes lds3985xx 18/20 doc id 11039 rev 7 8 order codes table 6. order codes packages output voltage sot23-5l dfn6 dfn6d lds3985m125r (1) 1. available on request. lds3985pm12r (1) 1.25 v lds3985m135r (1) lds3985pm13r (1) 1.35 v lds3985m15r lds3985pm15r (1) lds3985pu15r 1.5 v lds3985m18r lds3985pm18r (1) 1.8 v lds3985m20r (1) lds3985pm20r (1) 2.0 v lds3985m21r (1) lds3985pm21r (1) 2.1 v lds3985m22r (1) lds3985pm22r (1) 2.2 v lds3985m25r lds3985pm25r (1) 2.5 v lds3985m26r (1) lds3985pm26r (1) 2.6 v lds3985m27r (1) lds3985pm27r (1) 2.7 v lds3985m28r lds3985pu28r 2.8 v lds3985m285r (1) lds3985pm285r (1) 2.85 v lds3985m29r (1) lds3985pm29r (1) 2.9 v lds3985m30r lds3985pm30r (1) 3.0 v lds3985m33r lds3985pu33r 3.3 v lds3985m47r (1) lds3985pm47r (1) 4.7 v lds3985m48r (1) lds3985pm48r (1) 4.8 v lds3985m49r (1) lds3985pm49r (1) 4.9 v lds3985m50r lds3985pm50r (1) 5.0 v
lds3985xx revision history doc id 11039 rev 7 19/20 9 revision history table 7. document revision history date revision changes 02-dec-2004 1 first release. 10-apr-2007 2 added: new package tsot23-5l. 16-may-2007 3 added: new mechanical data dfn6d and order codes updated. 06-sep-2007 4 added: ta b l e 1 in cover page. 11-jun-2008 5 modified: table 6 on page 18 . 11-jul-2009 6 modified: table 6 on page 18 . 29-jul-2010 7 modified: table 1 on page 1 and table 6 on page 18 .
lds3985xx 20/20 doc id 11039 rev 7 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. ? 2010 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

▲Up To Search▲

Price & Availability of LDS3985XX15

	To Download LDS3985XX15 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .