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june 2007 rev. 12 1/24 24 l7900 series negative voltage regulators features output current up to 1.5a output voltages of -5; -6; -8; -12; -15; -18; -20; -24v thermal overload protection short circuit protection output transition soa protection description the l7900 series of three-terminal negative regulators is available in to-220, to-220fp, to-3 and d 2 pak packages and several fixed output voltages, making it useful in a wide range of applications. these regula tors can provide local on-card regulation, eliminating the distribution problems associated with single point regulation; furthermore, having the same voltage option as the l7800 positive standard series, they are particularly suited for split power supplies. if adequate heat sinking is provided, they can deliver over 1.5a output current. although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents. to-220fp d 2 pak to-220 to-3 www.st.com schematic diagram
l7900 series 2/24 contents 1 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 6 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 7 order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 8 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
l7900 series pin configuration 3/24 1 pin configuration figure 1. pin connections (top view) to220fp to-3 to-220 d 2 pak (any type)
maximum ratings l7900 series 4/24 2 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 1. absolute maximum ratings symbol parameter value unit v i dc input voltage for v o = 5 to 18v -35 v for v o = 20, 24v -40 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 0 to 150 c table 2. thermal data symbol parameter d 2 pak to-220 to-220fp to-3 unit r thjc thermal resistance junction-case 3 3 5 4 c/w r thja thermal resistance juncti on-ambient 62.5 50 60 35 c/w
l7900 series test circuit 5/24 3 test circuit figure 2. test circuit
electrical characteristics l7900 series 6/24 4 electrical characteristics table 3. electrical characteristics of l7905c (refer to the test circuits, t j = 0 to 125c, v i = -10v, i o = 500 ma, c i = 2.2 f, c o = 1 f unless otherwise specified) symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25c -4.8 -5 -5.2 v v o output voltage i o = -5 ma to -1 a, p o 15 w v i = -8 to -20 v -4.75-5-5.25 v v o (1) 1. load and line regulation are spec ified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. line regulation v i = -7 to -25 v, t j = 25c 100 mv v i = -8 to -12 v, t j = 25c 50 v o (1) load regulation i o = 5 ma to 1.5 a, t j = 25c 100 mv i o = 250 to 750 ma, t j = 25c 50 i d quiescent current t j = 25c 3 ma i d quiescent current change i o = 5 ma to 1 a 0.5 ma v i = -8 to -25 v 1.3 v o / t output voltage drift i o = 5 ma -0.4 mv/c en output noise voltage b = 10hz to 100khz, t j = 25c 100 v svr supply voltage rejection v i = 10 v, f = 120hz 54 60 db v d dropout voltage i o = 1 a, t j = 25c, v o = 100 mv 1.4 v i sc short circuit current 2.1 a
l7900 series electrical characteristics 7/24 table 4. electrical characteristics of l7906c (refer to the test circuits, t j = 0 to 125c, v i = -11v, i o = 500 ma, c i = 2.2 f, c o = 1 f unless otherwise specified) symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25c -5.75-6-6.25 v v o output voltage i o = -5 ma to -1 a, p o 15 w v i = -9.5 to -21.5 v -5.7 -6 -6.3 v v o (1) line regulation v i = -8.5 to -25 v, t j = 25c 120 mv v i = -9 to -15 v, t j = 25c 60 v o (1) load regulation i o = 5 ma to 1.5 a, t j = 25c 120 mv i o = 250 to 750 ma, t j = 25c 60 i d quiescent current t j = 25c 3 ma i d quiescent current change i o = 5 ma to 1 a 0.5 ma v i = -9.5 to -25 v 1.3 v o / t output voltage drift i o = 5 ma -0.6 mv/c en output noise voltage b = 10hz to 100khz, t j = 25c 144 v svr supply voltage rejection v i = 10 v, f = 120hz 54 60 db v d dropout voltage i o = 1 a, t j = 25c, v o = 100 mv 1.4 v i sc short circuit current 2 a 1. load and line regulation are spec ified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. table 5. electrical characteristics of l7908c (refer to the test circuits, t j = 0 to 125c, v i = -14v, i o = 500 ma, c i = 2.2 f, c o = 1 f unless otherwise specified) symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25c -7.7 -8 -8.3 v v o output voltage i o = -5 ma to -1 a, p o 15 w v i = -11.5 to -23 v -7.6 -8 -8.4 v v o (1) line regulation v i = -10.5 to -25 v, t j = 25c 160 mv v i = -11 to -17 v, t j = 25c 80 v o (1) load regulation i o = 5 ma to 1.5 a, t j = 25c 160 mv i o = 250 to 750 ma, t j = 25c 80 i d quiescent current t j = 25c 3 ma i d quiescent current change i o = 5 ma to 1 a 0.5 ma v i = -11.5 to -25 v 1 v o / t output voltage drift i o = 5 ma -0.6 mv/c en output noise voltage b = 10hz to 100khz, t j = 25c 175 v svr supply voltage rejection v i = 10 v, f = 120hz 54 60 db v d dropout voltage i o = 1 a, t j = 25c, v o = 100 mv 1.1 v i sc short circuit current 1.5 a 1. load and line regulation are spec ified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used.
electrical characteristics l7900 series 8/24 table 6. electrical characteristics of l7912c (refer to the test circuits, t j = 0 to 125c, v i = -19v, i o = 500 ma, c i = 2.2 f, c o = 1 f unless otherwise specified) symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25c -11.5 -12 -12.5 v v o output voltage i o = -5 ma to -1 a, p o 15 w v i = -15.5 to -27 v -11.4 -12 -12.6 v v o (1) line regulation v i = -14.5 to -30 v, t j = 25c 240 mv v i = -16 to -22 v, t j = 25c 120 v o (1) load regulation i o = 5 ma to 1.5 a, t j = 25c 240 mv i o = 250 to 750 ma, t j = 25c 120 i d quiescent current t j = 25c 3 ma i d quiescent current change i o = 5 ma to 1 a 0.5 ma v i = -15 to -30 v 1 v o / t output voltage drift i o = 5 ma -0.8 mv/c en output noise voltage b = 10hz to 100khz, t j = 25c 200 v svr supply voltage rejection v i = 10 v, f = 120hz 54 60 db v d dropout voltage i o = 1 a, t j = 25c, v o = 100 mv 1.1 v i sc short circuit current 1.5 a 1. load and line regulation are spec ified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. table 7. electrical characteristics of l7915c (refer to the test circuits, t j = 0 to 125c, v i = -23v, i o = 500 ma, c i = 2.2 f, c o = 1 f unless otherwise specified) symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25c -14.4 -15 -15.6 v v o output voltage i o = -5 ma to -1 a, p o 15 w v i = -18.5 to -30 v -14.3 -15 -15.7 v v o (1) line regulation v i = -17.5 to -30 v, t j = 25c 300 mv v i = -20 to -26 v, t j = 25c 150 v o (1) load regulation i o = 5 ma to 1.5 a, t j = 25c 300 mv i o = 250 to 750 ma, t j = 25c 150 i d quiescent current t j = 25c 3 ma i d quiescent current change i o = 5 ma to 1 a 0.5 ma v i = -18.5 to -30 v 1 v o / t output voltage drift i o = 5 ma -0.9 mv/c en output noise voltage b = 10hz to 100khz, t j = 25c 250 v svr supply voltage rejection v i = 10 v, f = 120hz 54 60 db v d dropout voltage i o = 1 a, t j = 25c, v o = 100 mv 1.1 v i sc short circuit current 1.3 a 1. load and line regulation are spec ified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used.
l7900 series electrical characteristics 9/24 table 8. electrical characteristics of l7918c (refer to the test circuits, t j = 0 to 125c, v i = -27v, i o = 500 ma, c i = 2.2 f, c o = 1 f unless otherwise specified) symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25c -17.3 -18 -18.7 v v o output voltage i o = -5 ma to -1 a, p o 15 w v i = -22 to -33 v -17.1 -18 -18.9 v v o (1) line regulation v i = -21 to -33 v, t j = 25c 360 mv v i = -24 to -30 v, t j = 25c 180 v o (1) load regulation i o = 5 ma to 1.5 a, t j = 25c 360 mv i o = 250 to 750 ma, t j = 25c 180 i d quiescent current t j = 25c 3 ma i d quiescent current change i o = 5 ma to 1 a 0.5 ma v i = -22 to -33 v 1 v o / t output voltage drift i o = 5 ma -1 mv/c en output noise voltage b = 10hz to 100khz, t j = 25c 300 v svr supply voltage rejection v i = 10 v, f = 120hz 54 60 db v d dropout voltage i o = 1 a, t j = 25c, v o = 100 mv 1.1 v i sc short circuit current 1.1 a 1. load and line regulation are spec ified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. table 9. electrical characteristics of l7920c (refer to the test circuits, t j = 0 to 125c, v i = -29v, i o = 500 ma, c i = 2.2 f, c o = 1 f unless otherwise specified) symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25c -19.2 -20 -20.8 v v o output voltage i o = -5 ma to -1 a, p o 15 w v i = -24 to -35 v -19 -20 -21 v v o (1) line regulation v i = -23 to -35 v, t j = 25c 400 mv v i = -26 to -32 v, t j = 25c 200 v o (1) load regulation i o = 5 ma to 1.5 a, t j = 25c 400 mv i o = 250 to 750 ma, t j = 25c 200 i d quiescent current t j = 25c 3 ma i d quiescent current change i o = 5 ma to 1 a 0.5 ma v i = -24 to -35 v 1 v o / t output voltage drift i o = 5 ma -1.1 mv/c en output noise voltage b = 10hz to 100khz, t j = 25c 350 v svr supply voltage rejection v i = 10 v, f = 120hz 54 60 db v d dropout voltage i o = 1 a, t j = 25c, v o = 100 mv 1.1 v i sc short circuit current 0.9 a 1. load and line regulation are spec ified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used.
electrical characteristics l7900 series 10/24 table 10. electrical characteristics of l7924c (refer to the test circuits, t j = 0 to 125c, v i = -33v, i o = 500 ma, c i = 2.2 f, c o = 1 f unless otherwise specified) symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25c -23 -24 -24.5 v v o output voltage i o = -5 ma to -1 a, p o 15 w v i = -27 to -38 v -22.8 -24 -25.2 v v o (1) line regulation v i = -27 to -38 v, t j = 25c 480 mv v i = -30 to -36 v, t j = 25c 240 v o (1) load regulation i o = 5 ma to 1.5 a, t j = 25c 480 mv i o = 250 to 750 ma, t j = 25c 240 i d quiescent current t j = 25c 3 ma i d quiescent current change i o = 5 ma to 1 a 0.5 ma v i = -27 to -38 v 1 v o / t output voltage drift i o = 5 ma -1 mv/c en output noise voltage b = 10hz to 100khz, t j = 25c 400 v svr supply voltage rejection v i = 10 v, f = 120hz 54 60 db v d dropout voltage i o = 1 a, t j = 25c, v o = 100 mv 1.1 v i sc short circuit current 1.1 a 1. load and line regulation are spec ified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used.
l7900 series application information 11/24 5 application information 1. to specify an output voltage, substitute voltage value for "xx". 2. required for stability. for value give n, capacitor must be solid tantalum. if aluminium electr olytic are used, at least ten times value should be sele cted. c1 is required if regulator is located an appreciable distance from power supply filter. 3. to improve transient response. if large capacitors are used, a high current diode from input to output (1n4001 or similar) should be intr oduced to protect the dev ice from momentary input short circuit. (*) against potential latch-up problems. figure 3. fixed output regulator figure 4. split power supply ( 15v - 1 a)
application information l7900 series 12/24 c3 optional for improved transient response and ripple rejection. figure 5. circuit for increasing output voltage v xx /r 2 > 3i d v o =v xx (r 1 +r 2 )/r 2 figure 6. high current negative regulator (-5v/4a with 5a current limiting)
l7900 series package mechanical data 13/24 6 package mechanical data in order to meet environmental requirements, st offers these devices in ecopack ? packages. these packages have a lead-free second level interconnect. the category of second level interconnect is marked on the package and on the inner box label, in compliance with jedec standard jesd97. the maximum ratings related to soldering conditions are also marked on the inner box label. ecopack is an st trademark. ecopack specifications are available at: www.st.com.
package mechanical data l7900 series 14/24 dim. mm. inch min. typ max. min. typ. max. a 11.85 0.466 b 0.96 1.05 1.10 0.037 0.041 0.043 c 1.70 0.066 d 8.7 0.342 e 20.0 0.787 g 10.9 0.429 n 16.9 0.665 p 26.2 1.031 r 3.88 4.09 0.152 0.161 u 39.5 1.555 v 30.10 1.185 to-3 mechanical data p003c/c e b r c d a p g n v u o
l7900 series package mechanical data 15/24 dim. mm. inch min. typ max. min. typ. max. a 4.40 4.60 0.173 0.181 b 0.61 0.88 0.024 0.034 b1 1.15 1.70 0.045 0.067 c 0.49 0.70 0.019 0.027 d 15.25 15.75 0.600 0.620 e 10.0 10.40 0.393 0.409 e 2.4 2.7 0.094 0.106 e1 4.95 5.15 0.194 0.203 f 1.23 1.32 0.048 0.051 h1 6.2 6.6 0.244 0.260 j1 2.40 2.72 0.094 0.107 l 13.0 14.0 0.511 0.551 l1 3.5 3.93 0.137 0.154 l20 16.4 0.645 l30 28.9 1.138 p 3.75 3.85 0.147 0.151 q 2.65 2.95 0.104 0.116 to-220 (a type) mechanical data 0015988/n
package mechanical data l7900 series 16/24 dim. mm. inch min. typ max. min. typ. max. a 4.40 4.60 0.173 0.181 b 2.5 2.7 0.098 0.106 d 2.5 2.75 0.098 0.108 e 0.45 0.70 0.017 0.027 f 0.75 1 0.030 0.039 f1 1.15 1.50 0.045 0.059 f2 1.15 1.50 0.045 0.059 g 4.95 5.2 0.194 0.204 g1 2.4 2.7 0.094 0.106 h 10.0 10.40 0.393 0.409 l2 16 0.630 l3 28.6 30.6 1.126 1.204 l4 9.8 10.6 0.385 0.417 l5 2.9 3.6 0.114 0.142 l6 15.9 16.4 0.626 0.645 l7 9 9.3 0.354 0.366 dia. 3 3.2 0.118 0.126 to-220fp mechanical data 7012510a-h
l7900 series package mechanical data 17/24 figure 7. drawing dimension d 2 pak (type std-st) 0079457/l
package mechanical data l7900 series 18/24 figure 8. drawing dimension d 2 pak (type wooseok-subcon.) 0079457/l
l7900 series package mechanical data 19/24 note: the d 2 pak package coming from the subcontractor wooseok is fully compatible with the st's package suggested footprint. table 11. d 2 pak mechanical data dim. type std-st type wooseok-subcon. mm. mm. min. typ. max. min. typ. max. a 4.40 4.60 4.30 4.70 a1 0.03 0.23 0 0.20 b 0.70 0.93 0.70 0.90 b2 1.14 1.70 1.17 1.37 c 0.45 0.60 0.45 0.50 0.60 c2 1.23 1.36 1.25 1.30 1.40 d 8.95 9.35 9 9.20 9.40 d1 7.50 7.50 e 10 10.40 9.80 10.20 e1 8.50 7.50 e2.54 2.54 e1 4.88 5.28 5.08 h 15 15.85 15 15.30 15.60 j1 2.49 2.69 2.20 2.60 l 2.29 2.79 1.79 2.79 l1 1.27 1.40 1 1.40 l2 1.30 1.75 1.20 1.60 r 0.4 0.30 v2 0 8 0 3
package mechanical data l7900 series 20/24 figure 9. d 2 pak footprint recommended data table 12. footprint data values mm. inch. a 12.20 0.480 b9.750.384 c 16.90 0.665 d3.500.138 e1.600.063 f2.540.100 g5.080.200
l7900 series package mechanical data 21/24 dim. mm. inch min. typ max. min. typ. max. a 180 7.086 c 12.8 13.0 13.2 0.504 0.512 0.519 d 20.2 0.795 n 60 2.362 t 14.4 0.567 ao 10.50 10.6 10.70 0.413 0.417 0.421 bo 15.70 15.80 15.90 0.618 0.622 0.626 ko 4.80 4.90 5.00 0.189 0.193 0.197 po 3.9 4.0 4.1 0.153 0.157 0.161 p 11.9 12.0 12.1 0.468 0.472 0.476 ta pe & reel d 2 pak-p 2 pak-d 2 pak/a-p 2 pak/a mechanical data
order codes l7900 series 22/24 7 order codes table 13. order codes part numbers packaging to-220 (a type) d 2 pak to-220fp to-3 out. volt. l7905c l7905cv l7905cd2t-tr l7905cp l7905ct (1) -5 v l7906c l7906cv l7906cd2t-tr l7906cp (1) l7906ct (1) -6 v l7908c l7908cv l7908cp (1) l7908ct (1) -8 v l7912c l7912cv l7912cd2t-tr l7912cp L7912CT (1) -12 v l7915c l7915cv l7915cd2t-tr l7915cp l7915ct -15 v l7918c l7918cv l7918cd2t-tr (1) 1. available on request. l7918cp (1) l7918ct (1) -18 v l7920c l7920cv l7920cd2t-tr (1) l7920cp (1) l7920ct (1) -20 v l7924c l7924cv l7924cd2t-tr (1) l7924cp (1) l7924ct -24 v
l7900 series revision history 23/24 8 revision history table 14. revision history date revision changes 22-jun-2004 9 order codes updated table 3, pag. 3. 31-aug-2005 10 add new order codes (to-220 e type) on table 3, pag. 3. 19-jan-2007 11 d 2 pak mechanical data has been updated, add footprint data and the document has been reformatted. 06-jun-2007 12 order codes has been updated.
l7900 series 24/24 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. ? 2007 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 - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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