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this is information on a product in full production. october 2014 docid026624 rev 1 1/22 st1l08 800 ma ultra low drop, high psrr voltage regulator datasheet - production data features ? input voltage from 1 to 5.5 v ? ultra low-dropout voltage (90 mv max. @ 800 ma load) ? low ground current (35 a typ. @ no load) ? output voltage tolerance: 2.0% @ 25 c ? high psrr: 80 db @ 100 hz, 50 db @1 mhz ? 800 ma guaranteed output current ? wide range of output voltages available on request: from 0.5 v to 4 v and adjustable ? logic-controlled electronic shutdown ? internal current and thermal limit ? power good function ? available in dfn8 2x3 mm package ? temperature range: -40 c to 125 c ? input voltage control for the st1l08sxx applications ? consumer ? hard disk drives, ssd ? computer ? battery-powered systems ? low voltage point of load description the st1l08 provides 0.8 a of maximum current from an input voltage in the range from 1 v to 5.5 v, with a typical dropout voltage as low as 70 mv. it is stabilized with a ceramic capacitor on the output. the very low drop voltage, low quiescent current and high psrr features make it suitable for low power battery-powered applications. enable logic control function puts the st1l08 in shutdown mode, reducing the total current consumption. power good function and input voltage control feature the st1l08sxx version. the device is equipped with current limit and thermal protection. dfn8 2x3 mm table 1. device summary order codes power good and v in control package output voltages st1l08spu12r yes dfn8 (2x3 mm) 1.2 v st1l08spu33r yes 3.3 v ST1L08SPUR yes adjustable st1l08pur no adjustable www.st.com
contents st1l08 2/22 docid026624 rev 1 contents 1 diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6.1 thermal and short-circuit protections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6.2 output voltage setting for adj version . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6.3 bias pin voltage requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6.4 external capacitors requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7 typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 8 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 8.1 packing mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 9 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
docid026624 rev 1 3/22 st1l08 diagram 22 1 diagram figure 1. block diagram
pin configuration st1l08 4/22 docid026624 rev 1 2 pin configuration figure 2. pin connection (top view) adjus ta ble ve rs ion f ixed vers ion v out v in en v bias nc gnd adj pg/nc v out v in en v bias nc gnd pg nc table 2. pin description symbol function v in input voltage of the ldo (power element) v bias bias input of the ldo gnd common ground en enable pin logic input: low = shutdown, high = active adj adjustable pin (on adjustable version) v out output voltage of the ldo pg power good pin (not connected on the st1l08pur) nc not connected exp exposed pad (should be connected to gnd)
docid026624 rev 1 5/22 st1l08 typical application 22 3 typical application figure 3. typical application circuits (1) 1. power good feature is not present on the st1l08pur. $gmxvwdeohyhuvlrq *,3*59 )l[hgyhuvlrq
maximum ratings st1l08 6/22 docid026624 rev 1 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 7 v v bias dc bias voltage - 0.3 to 7 v out dc output voltage - 0.3 to v i + 0.3 v v en enable input voltage - 0.3 to v bias + 0.3 v v pg power good pin voltage - 0.3 to v bias + 0.3 v v adj adj pin voltage - 0.3 to v bias + 0.3 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 dfn8 (2x3 mm) unit r thja thermal resistance junction-ambient 55 c/w r thjc thermal resistance junction-case 12 c/w
docid026624 rev 1 7/22 st1l08 electrical characteristics 22 5 electrical characteristics t j = 25 c, v in = 1.5 v, v bias = 3.6 v, v out = v adj , c in = c bias = 1 f, c out = 4.7 f, v en = v bias , unless otherwise specified table 5. electrical characteristics for the st1l08 (adjustable) symbol parameter test conditions min. typ. max. unit v in operating input voltage 1 5.5 v v bias operating bias voltage (1) 2.7 5.5 v i in v in operating current 0.2 10 a i bias v bias operating current i out = 10 a 40 150 a v adj v adj accuracy i out = 1 ma to 800 ma, t j = 25 c 0.490 0.500 0.510 v -40 c < t j < 125 c, v out = 0.5 v 0.487 0.500 0.512 v out v in static line regulation i out = 1 ma, v out = 0.5 v v bias = 3.6 v 1 v v in 5.5 v 0.002 0.01 %/v v bias static line regulation i out = 100 ma, v out = 0.5 v v in = 1.5 v 2.7 v v bias 5.5 v 0.04 0.2 %/v v out static load regulation i out = 1 ma to 800 ma 0.0002 0.001 %/ma v drop dropout voltage i out = 800 ma, v bias = 3.6 v 70 90 mv 40 c < t j < 125 c 120 e n output noise voltage 10 hz to 100 khz, i out = 10 ma 50 v rms svr supply voltage rejection v in > v out + 0.5 v +/- v ripple v ripple = 0.1 v f = 100 hz 80 db f = 10 khz 60 f = 1 mhz 50 i gnd ground current i out = 0 ma, t j = 25 c 35 a i out = 500 ma, t j = 25 c 40 i out = 800 ma, 40 c < t j < 125 c 40 150 i sc short-circuit current r l = 0 40 a v en enable input logic low 0.8 v enable input logic high 1.3 i en enable pin input current v en = 1.3 v 1 a
electrical characteristics st1l08 8/22 docid026624 rev 1 t j = 25 c, v in = v out + 0.5 v, v bias = v out + 1.5 v (1) , c in = c bias = 1 f, c out = 4.7 f, v en = v bias , unless otherwise specified pg (2) power good output threshold rising edge 0.92*v out v falling edge 0.8*v out power good output voltage low i sink =6 ma open drain output 0.4 v t shdn thermal shutdown 165 c hysteresis 20 1. important: in any case v bias v out + 1.5 v. 2. power good feature is not available on the st1l08pur. table 5. electrical characteristics for the st1l08 (adjustable) (continued) symbol parameter test conditions min. typ. max. unit table 6. electrical characteristics for the st1l08 (fixed) symbol parameter test conditions min. typ. max. unit v in operating input voltage 1 5.5 v v bias operating bias voltage (1) 2.7 5.5 v v out output voltage range 0.5 4 v i in v in operating current 4 10 a i bias v bias operating current i out = 10 a 45 150 a v out v out accuracy i out = 1 ma to 800 ma, t j = 25 c -2 +2 % -40 c < t j < 125 c -2.5 2.5 v out v in static line regulation i out = 1 ma v bias = v out + 1.5 v v out + 0.5 v v in 5.5 v 0.003 0.015 %/v v bias static line regulation i out = 100 ma v in = v out + 0.5 v v out + 1.5 v v bias 5.5 v 0.04 0.2 %/v v out static load regulation i out = 1 ma to 800 ma 0.0005 0.0025 %/ma v drop dropout voltage i out = 800 ma, v bias = 4.8 v, v out = 3.3 v 100 mv 40 c < t j < 125 c 150 e n output noise voltage 10 hz to 100 khz, i out = 10 ma, v out = 3.3 v 200 v rms
docid026624 rev 1 9/22 st1l08 electrical characteristics 22 svr supply voltage rejection v in > v out + 0.5 v +/- v ripple v ripple = 0.1 v f = 100 hz 70 db f = 10 khz 53 f = 1 mhz 30 i gnd ground current i out = 0 ma, t j = 25 c 40 a i out = 500 ma, t j = 25 c 50 i out = 800 ma, 40 c application information st1l08 10/22 docid026624 rev 1 6 application information 6.1 thermal and short-circuit protections the st1l08 is self-protected from short-circuit condition and overtemperature. when the output load is higher than the one supported by the device, the output current increases until the limit of typically 1.8 a is reached, at this point the current is kept constant even when the load impedance is zero. thermal protection acts when the junction temperature reaches 165 c typical. at this point the output of the ic shuts down. as soon as the junction temperature falls below the thermal hysteresis value the device starts working again. in order to calculate the maximum power that the device can dissipate, keeping the junction temperature below the t op , the following formula is used: equation 1 p dmax = (125-t amb )/r thja 6.2 output voltage setting for adj version in the adjustable version, the output voltage can be set from 0.5 v up to 4 v, by connecting a resistor divider between the adj pin and the output, thus allowing remote voltage sensing. the resistor divider should be selected using the following equation: equation 2 v out = v adj (1 + r1 / r2), with v adj = 0.5 v (typ.) the resistors to be used, should have values in the range from 10 k ? to 100 k ? . lower values can also be suitable, but they increase current consumption. 6.3 bias pin voltage requirements the bias input is designed for low drop applications. the bias pin must be at least 2.7 v, and at least 1.5 v higher than the output, to ensure proper biasing to the n-channel power pass transistor. if v in supply voltage meets these requirements, the bias pin can be tied to v in . 6.4 external capacitors requirements the regulator is designed to be stable with ultra low esr ceramic capacitors on the input and the output. the suggested minimum value of the input, bias and output capacitors is 1 f. the input capacitor must be connected as closer as possible to the v in terminal. the output capacitor must also be connected as closer as possible to the output pin.
docid026624 rev 1 11/22 st1l08 typical characteristics 22 7 typical characteristics t j = 25 c, v in = 1.5 v, v bias = 3.6 v, v out = v adj , c in = c bias = 1 f, c out = 4.7 f, v en = v bias , unless otherwise specified figure 4. output voltage vs. temperature (adjustable, i out = 1 ma) figure 5. output voltage vs. temperature (fixed 3.3 v, i out = 1 ma) figure 6. output voltage vs. temperature (adjustable, i out = 800 ma) figure 7. output voltage vs.temperature (fixed 3.3 v, i out = 800 ma) 9 287 >9@ 7>?&@ *,3*59 9 287 9 $'- 9 %,$6 9 (1 99 ,1 9, 287 p$ 7>?&@ *,3*59 9 287 >9@ 9 287 99 ,1 99 %,$6 9 (1 9, 287 p$ 9 287 >9@ 7>?&@ *,3*59 9 287 9 $'- 9 %,$6 9 (1 99 , 1 9, 287 p$ 7>?&@ *,3*59 9 287 >9@ 9 287 99 ,1 99 %,$6 9 (1 9, 287 p$
typical characteristics st1l08 12/22 docid026624 rev 1 figure 8. v in line regulation vs. temperature (adjustable) figure 9. v bias line regulation vs. temperature (adjustable) 7>?&@ *,3*59 9 2 8 7 >p9@ 9 ,1 wr99 %,$6 9, 287 p$9 287 9 7>?&@ 9 287 >p9@ *,3*59 9 ,1 99 %,$6 wr9, rx7 p$ 9 rxw 9 figure 10. load regulation vs. temperature (adjustable) figure 11. ground current vs. temperature (adjustable, i out = 0 ma) *,3*59 9 ,1 99 %,$6 9, 287 p$wr$ 7>?&@ 9 287 >p9@ 7>?&@ *,3*59 , *1' >?$@ 9 ,1 99 %,$6 9, 287 p$
docid026624 rev 1 13/22 st1l08 typical characteristics 22 figure 12. ground current vs. temperature (adjustable, i out = 500 ma) figure 13. ground current vs. temperature (adjustable, i out = 800 ma) 7>?&@ *,3*59 9 ,1 99 %,$6 9, 287 p$ , *1' >?$@ 7>?&@ *,3*59 9 ,1 99 %,$6 9, 287 p$ , *1' >?$@ figure 14. ground current in off mode vs. temperature (adjustable) figure 15. ground current vs. output current (adjustable) 7>?&@ *,3*59 9 ,1 99 %,$6 99 (1 9, 287 p$ , *1' >?$@ *,3*5 9 ,1 99 %,$6 9 (1 99 287 9 $'- 7 ?& , *1' >?$@ , 287 >$@
typical characteristics st1l08 14/22 docid026624 rev 1 figure 16. dropout voltage vs. temperature (adjustable) figure 17. dropout voltage temperature (fixed 3.3 v) 7>? &@ *,3*59 9 'urs > p 9 @ 9 %,$6 9 (1 9, 287 p$ 7>?&@ *,3*59 9 'urs >p9@ 9 %,$6 9 (1 9, 287 p$ figure 18. dropout voltage vs. output curren t figure 19. supply voltage rejection vs. frequency , 287 >$@ *,3*59 9 'urs >p9@ 9 %,$6 9 (1 99 287 97 ?& 695>ge@ )uhtxhqf\>+]@ *,3*59 9 287 9 $'- 9 ,1 9?95lssoh9 (1 +ljk9 %,$6 97 ?&, 287 p$ & ,1 & %,$6 ?)& 287 ?) figure 20. output noise spectral density figure 21. stability area vs. (c out , esr) h1>x96457+]@ i>+]@ *,3*59 9 ,1 99 %,$6 9, 287 p$9 287 9 $'- & ,1 ?)& 287 ?) 67$%,/,7< $5($ (65rkp & 287 ?)phdvxuhgydoxh 9 287 9 $'- 9 %,$6 iurp9wr99 (1 +ljk9 ,1 iurp9wr9
docid026624 rev 1 15/22 st1l08 typical characteristics 22 figure 22. v in line transient figure 23. v bias line transient gipg240620141211rv v out = v adj , v in from 1v to 5.5v, v bias = 3.6v, i out = 100ma, t rise =10s gipg240620141223rv v out = v adj , v in =1.5v, v bias = from 2.7v to 5.5v, i out = 100ma, t rise = 3s figure 24. load transient, c out = 4.7 f figure 25. load transient, c out =1 f v out = v adj , v in =1v, v bias =2.7v, i out =from 5ma to 800ma, c out =4.7f gipg240620141230rv gipg240920141350rv v out = v adj , v in =1v, v bias = 2.7v, i out = from 5ma to 800ma, c out =1f figure 26. enable transient, v bias before v in figure 27. enable transient v in before v bias gipd230920141034rv v out = v adj , v en = v bias = from 0 to 2.7v, v in = from 0 to 1v, i out = 800ma, trise =1s fall time vin= 0 to 2v gipg240620141255rv v out = v adj , v in = from 0 to 1v, v en =v bias = from 0 to 2v, i out = 800ma, t rise = 10s
package mechanical data st1l08 16/22 docid026624 rev 1 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.
docid026624 rev 1 17/22 st1l08 package mechanical data 22 figure 28. dfn8 (2x3 mm) drawings 5 5 01 0 1 7* 7 * & 8 1-"/& 1 - " / & 4& 4 & " 5*/( 5 * / ( $ $ # 0 5 5 0. 0 . 7* 7 * & 8 4*%& 4 * % & 7* 7 * & 8 % & f c c " " " - - & & % % , , 1*/*% 1 * / * % 1*/*% 1 * / * %
package mechanical data st1l08 18/22 docid026624 rev 1 figure 29. dfn8 (2x3 mm) footprint table 7. dfn8 (2x3 mm) mechanical data dim. mm typ. min. max. a 0.90 0.80 1.00 a1 0.02 0.00 0.05 b 0.25 0.18 0.30 c0.10 d2.00 e3.00 d2 1.65 1.50 1.75 e2 1.80 1.65 1.90 e0.50 l 0.40 0.30 0.50 k0.20 )rrwsbb) ) r r w s b b )
docid026624 rev 1 19/22 st1l08 package mechanical data 22 8.1 packing mechanical data figure 30. tape for dfn8 (2x3 mm) figure 31. reel for dfn8 (2x3 mm) *,3'59 gipd141020141301rv
package mechanical data st1l08 20/22 docid026624 rev 1 table 8. dfn8 (2x3 mm) reel mechanical data dim. mm typ. min. max. a 180 c12.8 13.2 d20.2 n60 t 14.4
docid026624 rev 1 21/22 st1l08 revision history 22 9 revision history table 9. document revision history date revision changes 23-oct-2014 1 first release.
st1l08 22/22 docid026624 rev 1 important notice ? please read carefully stmicroelectronics nv and its subsidiaries (?st?) reserve the right to make changes, corrections, enhancements, modifications, and improvements to st products and/or to this document at any time without notice. purchasers should obtain the latest relevant in formation on st products before placing orders. st products are sold pursuant to st?s terms and conditions of sale in place at the time of o rder acknowledgement. purchasers are solely responsible for the choice, selection, and use of st products and st assumes no liability for application assistance or the design of purchasers? products. no license, express or implied, to any intellectual property right is granted by st herein. resale of st products with provisions different from the information set forth herein shall void any warranty granted by st for such product. st and the st logo are trademarks of st. all other product or service names are the property of their respective owners. information in this document supersedes and replaces information previously supplied in any prior versions of this document. ? 2014 stmicroelectronics ? all rights reserved

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