negative adjustable voltage regulator semelab limited reserves the right to change test c onditions, parameter limits and package dimensions without notice. information furnished by semelab is believed to be both accurate and reliable at the time of going to press. however semelab assumes no responsibility for any errors or omissions discovered in its use. semelab encourage s customers to verify that datasheets are current before placing o rders. semelab limited semelab limited semelab limited semelab limited coventry road, lutterworth, leicestershire, le17 4 jb telephone +44 (0) 1455 556565 fax +44 (0) 1455 5526 12 email: sales@semelab-tt.com website: http://www.semelab-tt.com document number 8377 issue 2 page 1 of 5 ip137smd05 / lm137smd05 ip137asmd05 / lm137asmd05 ip137hvsmd05 / lm137hvsmd05 ip137ahvsmd05/ lm137ahvsmd05 absolute maximum ratings (t c = 25c unless otherwise stated) standard 40v v i - v o input ? output voltage differential hv series 50v i o output current internally limited p d power dissipation internally limited t j operating junction temperature range -55 to +150c t stg storage temperature range -65 to +150c thermal properties symbols parameters min. typ. max. units r jc thermal resistance, junction to case 3.5 c/w ** this datasheet supersedes document 2831 description the 137 series regulators are adjustable 3 terminal voltage regulators capable of supplying in excess of -1.5a over an output voltage range of -1.2v to -37v (hv series, -47v). th e regulators are exceptionally easy to apply requir ing only 2 external resistors to set the output voltage and 1 output ca pacitor for frequency compensation. every effort has been made to make these devices ea sy to use and difficult to damage. internal current limiting and power limiting coupled with true thermal limiting prevent s damage due to overloads or shorts, even if the re gulators are not fastened to a heat sink. features 1.5a output current guaranteed internal thermal overload protection output short circuit protected hermetic ceramic surface mount package screening options available applications adjustable power supplies system power supplies precision voltage / current regulators
negative adjustable voltage regulator semelab limited semelab limited semelab limited semelab limited coventry road, lutterworth, leicestershire, le17 4 jb telephone +44 (0) 1455 556565 fax +44 (0) 1455 5526 12 email: sales@semelab-tt.com website: http://www.semelab-tt.com document number 8377 issue 2 page 2 of 5 electrical characteristics (1)(3) (t c = 25c unless otherwise stated) lm137, ip137, lm137hv, ip137hv symbols parameters test conditions min. typ max. units i out = 10ma -1.225 -1.250 -1.275 v ref reference voltage 10ma i out i max , p p max , 3v (v in -v out ) v max ? -1.200 -1.250 -1.300 v 0.010 0.020 in out v v d d line regulation (2) 3v (v in -v out ) v max , i out = 10ma ? 0.020 0.050 %/v v out 5v 15 25 mv v out 5v 0.3 0.5 % v out 5v ? 20 50 mv out i out v d d load regulation (2)(3) 10ma i out i max v out 5v ? 0.3 1.0 % thermal regulation v in = -14.58v, i out = 1.5a, p d = 20w, t a = 25c, 10ms pulse 0.002 0.02 %/w v out = -10v c adj = 0 60 ripple rejection f = 120hz c adj = 10f ? 66 77 db i adj adjust pin current ? 65 100 10ma i out i max ? 0.5 5 3v (v in -v out ) 40v ? 2 5 i adj adjust pin current change 3v (v in -v out ) 50v (hv series) (hv series) (hv series) (hv series) ? 3 6 a (v in - v out ) 40v ? 2.5 5 i min minimum load current (v in - v out ) 10v ? 1.2 3 ma (v in - v out ) 15v ? 1.5 2.2 3.2 (v in - v out ) = 40v ? 0.24 0.4 i cl current limit (v in - v out ) = 50v (hv series) (hv series) (hv series) (hv series) ? 0.2 0.4 0.8 a temp out v d d temperature stability ? 0.6 time out v d d long term stability t a = 125c, 1000hrs 0.3 1.0 e n rms output noise (% of v out ) t a = 25c, 10hz f 10khz 0.003 % notes notes notes notes the denotes the specifications which apply over the fu ll operating temperature range. (1) test conditions unless otherwise stated: v in - v out = 5v, i out = 0.5a, p max = 20w, i max = 1.5a (2) regulation is measured at constant junction tempera ture, using pulse testing at a low duty cycle. chan ges in output voltage due to heating effects are covered under thermal regulation specif ications. load regulation is measured at the juncti on of the wide and narrow portion of the output lead. (3) v max = 40v for lm137, ip137, lm137a, ip137a v max = 50v for lm137hv, ip137hv, lm137ahv, ip137ahv
negative adjustable voltage regulator semelab limited semelab limited semelab limited semelab limited coventry road, lutterworth, leicestershire, le17 4 jb telephone +44 (0) 1455 556565 fax +44 (0) 1455 5526 12 email: sales@semelab-tt.com website: http://www.semelab-tt.com document number 8377 issue 2 page 3 of 5 electrical characteristics (1)(3) (t c = 25c unless otherwise stated) lm137a, ip137a, lm137ahv, ip137ahv symbols parameters test conditions min. typ max. units i out = 10ma -1.238 -1.250 -1.262 v ref reference voltage 10ma i out i max , p p max , 3v (v in -v out ) v max -1.220 -1.250 -1.280 v 0.005 0.010 in out v v d d line regulation (2) 3v (v in -v out ) v max , i out = 10ma 0.010 0.030 %/v v out 5v 5 25 mv v out 5v 0.1 0.5 % v out 5v 10 50 mv out i out v d d load regulation (2)(3) 10ma i out i max v out 5v 0.2 1.0 % thermal regulation v in = -14.58v, i out = 1.5a, p d = 20w, t a = 25c, 10ms pulse 0.002 0.02 %/w v out = -10v c adj = 0 60 66 ripple rejection f = 120hz c adj = 10f 70 80 db i adj adjust pin current 65 100 10ma i out i max 0.2 2 3v (v in -v out ) 40v 1.0 5 i adj adjust pin current change 3v (v in -v out ) 50v (hv series) (hv series) (hv series) (hv series) 2 6 a (v in - v out ) 40v 2.5 5 i min minimum load current (v in - v out ) 10v 1.2 3 ma (v in - v out ) 15v 1.5 2.2 3.2 (v in - v out ) = 40v 0.24 0.4 1.0 i cl current limit (v in - v out ) = 50v (hv series) (hv series) (hv series) (hv series) 0.2 0.4 0.8 a temp out v d d temperature stability 0.6 1.5 time out v d d long term stability t a = 125c, 1000hrs 0.3 1.0 e n rms output noise (% of v out ) t a = 25c, 10hz f 10khz 0.003 % notes notes notes notes the denotes the specifications which apply over the fu ll operating temperature range. (1) test conditions unless otherwise stated: v in - v out = 5v, i out = 0.5a, p max = 20w, i max = 1.5a (2) regulation is measured at constant junction tempera ture, using pulse testing at a low duty cycle. chan ges in output voltage due to heating effects are covered under thermal regulation specif ications. load regulation is measured at the juncti on of the wide and narrow portion of the output lead. (3) v max = 40v for lm137, ip137, lm137a, ip137a v max = 50v for lm137hv, ip137hv, lm137ahv, ip137ahv
negative adjustable voltage regulator semelab limited semelab limited semelab limited semelab limited coventry road, lutterworth, leicestershire, le17 4 jb telephone +44 (0) 1455 556565 fax +44 (0) 1455 5526 12 email: sales@semelab-tt.com website: http://www.semelab-tt.com document number 8377 issue 2 page 4 of 5 applications information high stability regulator the output stability, load regulation, line regulat ion, thermal regulation, temperature drift, long term dr ift, and noise, can be improved by a factor of 6.6 over the standard regulator configuration. this assumes a zener has 20ppm/c maximum drift and about 10 times lower noise than the regulator. multiple tracking regulators in the application shown below, regulator #2 to ?n? will track regulator #1 to within 24mv initially, and t o 60mv over all load line, and temperature condition s. if any regulator output is shorted to ground, all o ther outputs will drop to - 2v. load regulation of regulators #2 to ?n? will be improved by v out / 1.25v compared to a standard, so regulator #1 should be the one which h as the lowest load current. dual tracking supply current regulator * solid tantalum ** r1 & r5 maybe trimmed slightly to improve tracki ng r3 1.5k 1% adj ip137 v in v out r1 1k 1% 1 m f Cv out solid tantalum 7v r2 * Cv in ( )v out 9.08 x 10 -3 C 908 w r2 = * c3 10 m f r2 adj ip137 v in v out 1n4002 r1 120 w Cv in adj ip137 v in v out 1n4002 2 m f c1 1 m f solid tantalum Cv out1 reg #1 2 m f reg #2 1 m f solid tantalum out2 Cv adj ip137 v in v out 1n4002 2 m f reg #n out n Cv 1 m f solid tantalum adj ip137 v in v out d2 1n4002 Cv out in Cv r5** 100 w 1% r3 5k 10 m f v in v out adj ip137 r1** 100 w 1% 10 m f 2.2 m f 2.2 m f d1 1n4002 in +v +v out r2 5k 1% r4 5k 1% * * adj v in v out (C) i (+) c1 1 m f solid tanatalum ip137 r s 0.8 w 250 w r s i = 65 m a + 1.25 v r s ip137 ip137 ip137 ip137 ip137 ip137 ip137
negative adjustable voltage regulator semelab limited semelab limited semelab limited semelab limited coventry road, lutterworth, leicestershire, le17 4 jb telephone +44 (0) 1455 556565 fax +44 (0) 1455 5526 12 email: sales@semelab-tt.com website: http://www.semelab-tt.com document number 8377 issue 2 page 5 of 5 mechanical data dimensions in mm (inches) smd05 (to276aa) pin 1 = adj. pin 2 = v in pin 3 = v out 2 1 3 2.41 (0.095) (0.030) min. 3.05 (0.120) 5.72 (.225) 0.127 (0.005) (0.296) 10.16 (0.400) 0.76 (0.030) min. 3.175 (0.125) max. 0.50 (0.020) max. 7.54 0.76 2.41 (0.095) 0.127 (0.005) (0.286) 7.26 16 plcs 0.50(0.020) 0.127 (0.005)
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