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1/17 september 2002 n typical dropout 1.3v (at 5a) n three terminal adjustable or fixed output voltage 1.8v, 2.5v, 2.85v, 3.3v, 3.6v, 5v, 8v, 9v, 12v. n guaranteed output current up to 5a n ouput tolerance 1% at 25c and 2% in full temperature range n internal power and thermal limit n wide operating temperature range -40c to 125c n package available : to-220, d 2 pak, d 2 pak/a n pinout compatibility with standard adjustable vreg description the ld1084 is a low drop voltage regulator able to provide up to 5a of output current. dropout is guaranteed at a maximum of 1.5v at the maximum output current, decreasing at lower loads. the ld1084 is pin to pin compatible with the older 3-terminal adjustable regulators, but has better performances in term of drop and output tolerance . a 2.85v output version is suitable for scsi-2 active termination. unlike pnp regulators, where a part of the output current is wasted as quiescent current, the ld1084 quiescent current flows into the load, so increase efficiency. only a 10f minimum capacitor is need for stability. the device is supplied in to-220, d 2 pak and d 2 pak/a. on chip trimming allows the regulator to reach a very tight output voltage tolerance, within 1% at 25c. ld1084 series 5a low drop positive voltage regulator adjustable and fixed schematic diagram to-220 d 2 pak d 2 pak/a
ld1084 series 2/17 absolute maximum ratings absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these condition is not implied. thermal data application circuits connection diagram (top view) symbol parameter2 value unit v i dc input voltage 30 v i o output current internally limited ma p d power dissipation internally limited mw t stg storage temperature range -55 to +150 c t op operating junction temperature range -40 to +125 c symbol parameter to-220 d 2 pak unit r thj-case thermal resistance junction-case 3 3 c/w r thj-amb thermal resistance junction-ambient 50 62.5 c/w r 2 v o =v ref (1 + ?? ) r 1 to-220 d 2 pak d 2 pak/a
ld1084 series 3/17 ordering codes (*) available in tape & reel with the suffix "r" for fixed versions and "-r" for adjustable version electrical characteristics of ld1084#18 (v i =4.8v, c i =c o =10 m f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. type d 2 pak (*) d 2 pak/a output voltage ld1084v18 ld1084d2t18 ld1084d2m18 1.8 v ld1084v25 ld1084d2t25 ld1084d2m25 2.5 v ld1084v28 ld1084d2t28 ld1084d2m28 2.85 v ld1084v33 ld1084d2t33 ld1084d2m33 3.3 v ld1084v36 ld1084d2t36 ld1084d2m36 3.6 v ld1084v50 ld1084d2t50 ld1084d2m50 5.0 v ld1084v80 ld1084d2t80 LD1084D2M80 8.0 v ld1084v90 ld1084d2t90 ld1084d2m90 9.0 v ld1084v120 ld1084d2t120 ld1084d2m120 12.0 v ld1084v ld1084d2t ld1084d2m adj symbol parameter test conditions min. typ. max. unit v o output voltage i o =0ma t j = 25c 1.782 1.8 1.818 v i o =0to5a v i = 3.4 to 30v (note 1) 1.764 1.8 1.836 v d v o line regulation i o =0ma v i = 3.4 to 18v t j = 25c 0.5 6 mv i o =0ma v i = 3.4 to 15v 0.1 6 mv d v o load regulation i o =0to5a t j = 25c 3 15 mv i o =0to5a 7 20 v v d dropout voltage i o =5 a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 5.5 6.5 a v i -v o = 25v 0.5 0.7 a termal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o =5a v i = 6.8 3v 60 75 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 %
ld1084 series 4/17 electrical characteristics of ld1084#25 (v i =5.5v, c i =c o =10 m f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. electrical characteristics of ld1084#285 (v i =5.85v, c i =c o =10 m f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. symbol parameter test conditions min. typ. max. unit v o output voltage i o =0ma t j = 25c 2.475 2.5 2.525 v i o =0to5a v i = 4.1 to 30v (note 1) 2.45 2.5 2.55 v d v o line regulation i o =0ma v i = 4.1 to 18v t j = 25c 0.5 6 mv i o =0ma v i = 4.1 to 18v 0.1 6 mv d v o load regulation i o =0to5a t j = 25c 3 15 mv i o =0to5a 7 20 v v d dropout voltage i o =5 a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 5.5 6.5 a v i -v o = 25v 0.5 0.7 a termal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o =5a v i = 7.5 3v 60 72 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 % symbol parameter test conditions min. typ. max. unit v o output voltage i o =0ma t j = 25c 2.821 2.85 2.879 v i o =0to5a v i = 4.5 to 30v (note 1) 2.793 2.85 2.907 v d v o line regulation i o =0ma v i = 4.5 to 18v t j = 25c 0.5 6 mv i o =0ma v i = 4.5 to 18v 0.1 6 mv d v o load regulation i o =0to5a t j = 25c 3 15 mv i o =0to5a 7 20 v v d dropout voltage i o =5 a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 5.5 6.5 a v i -v o = 25v 0.5 0.7 a termal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o =5a v i = 7.85 3v 60 72 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 %
ld1084 series 5/17 electrical characteristics of ld1084#33 (v i =6.3v, c i =c o =10 m f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. electrical characteristics of ld1084#36 (v i =6.6v, c i =c o =10 m f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. symbol parameter test conditions min. typ. max. unit v o output voltage i o =0ma t j = 25c 3.267 3.3 3.333 v i o =0to5a v i = 4.9 to 30v (note 1) 3.234 3.35 3.366 v d v o line regulation i o =0ma v i = 4.9 to 18v t j = 25c 0.5 6 mv i o =0ma v i = 4.9 to 18v 0.1 6 mv d v o load regulation i o =0to5a t j = 25c 3 15 mv i o =0to5a 7 20 v v d dropout voltage i o =5 a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 5.5 6.5 a v i -v o = 25v 0.5 0.7 a termal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o =5a v i = 8.3 3v 60 72 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 % symbol parameter test conditions min. typ. max. unit v o output voltage i o =0ma t j = 25c 3.564 3.6 3.636 v i o =0to5a v i = 5.2 to 30v (note 1) 3.528 3.6 3.672 v d v o line regulation i o =0ma v i = 5.2 to 18v t j = 25c 0.5 10 mv i o =0ma v i = 5.2 to 18v 0.1 10 mv d v o load regulation i o =0to5a t j = 25c 3 15 mv i o =0to5a 7 20 v v d dropout voltage i o =5 a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 5.5 6.5 a v i -v o = 25v 0.5 0.7 a termal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o =5a v i = 8.6 3v 60 72 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 %
ld1084 series 6/17 electrical characteristics of ld1084#5 (v i =8v, c i =c o =10 m f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. electrical characteristics of ld1084#8 (v i =11v, c i =c o =10 m f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. symbol parameter test conditions min. typ. max. unit v o output voltage i o =0ma t j = 25c 4.95 5 5.05 v i o =0to5a v i = 6.6 to 30v (note 1) 4.9 5 5.1 v d v o line regulation i o =0ma v i = 6.6 to 20v t j = 25c 0.5 10 mv i o =0ma v i = 6.6 to 20v 1 10 mv d v o load regulation i o =0to5a t j = 25c 5 20 mv i o =0to5a 10 35 v v d dropout voltage i o =5 a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 5.5 6.5 a v i -v o = 25v 0.5 0.7 a termal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o =5a v i =10 3v 60 72 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 % symbol parameter test conditions min. typ. max. unit v o output voltage i o =0ma t j = 25c 7.92 8 8.08 v i o =0to5a v i = 9.6 to 30v (note 1) 7.84 8 8.16 v d v o line regulation i o =0ma v i = 9.6 to 20v t j = 25c 1 18 mv i o =0ma v i = 9.6 to 20v 2 18 mv d v o load regulation i o =0to5a t j = 25c 8 30 mv i o =0to5a 12 60 v v d dropout voltage i o =5 a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 5.5 6.5 a v i -v o = 25v 0.5 0.7 a termal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o =5a v i =13 3v 54 71 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 %
ld1084 series 7/17 electrical characteristics of ld1084#9 (v i =12v, c i =c o =10 m f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. electrical characteristics of ld1084#120 (v i =15v, c i =c o =10 m f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. symbol parameter test conditions min. typ. max. unit v o output voltage i o =0ma t j = 25c 8.91 9 9.09 v i o =0to5a v i = 10.6 to 30v (note 1) 8.82 9 9.18 v d v o line regulation i o =0ma v i =10.6to20v t j = 25c 1 20 mv i o =0ma v i =10.6to20v 2 20 mv d v o load regulation i o =0to5a t j = 25c 8 30 mv i o =0to5a 12 60 v v d dropout voltage i o =5 a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 5.5 6.5 a v i -v o = 25v 0.5 0.7 a termal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o =5a v i =14 3v 54 70 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 % symbol parameter test conditions min. typ. max. unit v o output voltage i o =0ma t j = 25c 11.88 12 12.12 v i o =0to5a v i = 13.6 to 30v (note 1) 11.76 12 12.24 v d v o line regulation i o =0ma v i =13.6to25v t j = 25c 2 25 mv i o =0ma v i =13.6to25v 4 25 mv d v o load regulation i o =0to5a t j = 25c 12 36 mv i o =0to5a 24 72 v v d dropout voltage i o =5 a 1.3 1.5 v i q quiescent current v i 30v 5 10 ma i sc short circuit current v i -v o = 5v 5.5 6.5 a v i -v o = 25v 0.5 0.7 a termal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, i o =5a v i =17 3v 54 66 db en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 %
ld1084 series 8/17 electrical characteristics of ld1084 (v i =4.25v, c i =c o =10 m f, t a = -40 to 125c, unless otherwise specified.) note 1: see short-circuit current curve for available output current at fixed dropout. symbol parameter test conditions min. typ. max. unit v o output voltage i o = 10ma t j = 25c 1.237 1.25 1.263 v i o = 10ma to 5a v i = 2.85 to 30v (note 1) 1.225 1.25 1.275 v d v o line regulation i o = 10ma v i = 2.85 to 16.5v t j = 25c 0.015 0.2 % i o = 10ma v i = 2.85 to 16.5v 0.035 0.2 % d v o load regulation i o = 10ma to 5a t j = 25c 0.1 0.3 % i o = 10ma to 5a 0.2 0.4 % v d dropout voltage i o = 5a 1.3 1.5 v i o(min) minimum load current v i = 30v 3 10 ma i sc short circuit current v i -v o = 5v 5.5 6.5 a v i -v o = 25v 0.5 0.7 a termal regulation t a = 25c, 30ms pulse 0.003 0.015 %/w svr supply voltage rejection f = 120 hz, c o =25 m f, c adj =25 m f, i o =5a v i = 6.25 3v 60 72 db i adj adjust pin current v i = 4.25v i o =10ma 55 120 m a d i adj adjust pin current change i o = 10ma to 5a v i = 2.85 to 16.5v (note 1) 0.2 5 m a en rms output noise voltage (% of v o ) t a = 25c f =10hz to 10khz 0.003 % s temperature stability 0.5 % s long term stability t a = 125c 1000hrs 0.5 %
ld1084 series 9/17 typical characteristics (unless otherwise specified t j = 25c, c i =10 m f (tant.), c o =22 m f (tant.) figure 1 : short circuit current vs dropout voltage figure 2 : line regulation vs temperature figure 3 : quiescent current vs temperature figure 4 : output voltage vs temperature figure 5 : load regulation vs temperature figure 6 : quiescent current vs output voltage
ld1084 series 10/17 figure 7 : quiescent current vs input voltage figure 8 : dropout voltage vs output current figure 9 : supply voltage rejection vs output current figure 10 : dropout voltage vs temperature figure 11 : supply voltage rejection vs temperature figure 12 : supply voltage rejection vs frequency
ld1084 series 11/17 figure 13 : adjust pin current vs output current figure 14 : reference voltage vs temperature figure 15 : load regulation vs temperature figure 16 : adjust pin current vs temperature figure 17 : line regulation vs temperature figure 18 : minimum load currennt vs temperature
ld1084 series 12/17 figure 19 : supply voltage rejection vs temperature figure 20 : supply voltage rejection vs frequency figure 21 : stability figure 22 : supply voltage rejection vs output current figure 23 : stability figure 24 : line transient v i = 14 to 1 5 v , i o = 200 m a , c i = 1 m f( tant ) , c o = 10 m f( tant ) ,t s =t f =5 m s
ld1084 series 13/17 figure 25 : line transient figure 26 : load transient figure 27 : load transient figure 28 : line transient figure 29 : load transient v i = 12 to 13v , i o = 200 m a , c i = 1 m f( tant ) , c o = 10 m f( tant ) , n o c adj t s =t f =5 m s v i = 1 5 v , i o = 0 . 1 to 5 a , c i = 1 m f( tant ) , c o = 10 m f( tant ) v i = 15 v , i o = 0 . 1t o 5a , c i = 1 m f(t an t) , c o = 10 m f(t an t) , n o c adj v i = 12 to 13v , i o = 200 m a , c i = 1 m f( tant ) , c o = 10 m f( tant ) , c adj =1 m ft s =t f =5 m s v i = 13 v , i o = 0 . 1t o 5a , c i = 1 m f(t an t) , c o = 10 m f(t an t)
ld1084 series 14/17 dim. mm. inch min. typ max. min. typ. max. a 4.40 4.60 0.173 0.181 c 1.23 1.32 0.048 0.051 d 2.40 2.72 0.094 0.107 d1 1.27 0.050 e 0.49 0.70 0.019 0.027 f 0.61 0.88 0.024 0.034 f1 1.14 1.70 0.044 0.067 f2 1.14 1.70 0.044 0.067 g 4.95 5.15 0.194 0.203 g1 2.4 2.7 0.094 0.106 h2 10.0 10.40 0.393 0.409 l2 16.4 0.645 l4 13.0 14.0 0.511 0.551 l5 2.65 2.95 0.104 0.116 l6 15.25 15.75 0.600 0.620 l7 6.2 6.6 0.244 0.260 l9 3.5 3.93 0.137 0.154 dia. 3.75 3.85 0.147 0.151 to-220 mechanical dat a p011c
ld1084 series 15/17 dim. mm. inch min. typ max. min. typ. max. a 4.4 4.6 0.173 0.181 a1 2.49 2.69 0.098 0.106 a2 0.03 0.23 0.001 0.009 b 0.7 0.93 0.027 0.036 b2 1.14 1.7 0.044 0.067 c 0.45 0.6 0.017 0.023 c2 1.23 1.36 0.048 0.053 d 8.95 9.35 0.352 0.368 d1 8 0.315 e 10 10.4 0.393 0.409 e1 8.5 0.335 g 4.88 5.28 0.192 0.208 l 15 15.85 0.590 0.624 l2 1.27 1.4 0.050 0.055 l3 1.4 1.75 0.055 0.068 m 2.4 3.2 0.094 0.126 r 0.4 0.016 v2 0? 8? 0? 8? d 2 pak mec hanical data p011p6g
ld1084 series 16/17 dim. mm. inch min. typ max. min. typ. max. a 4.40 4.60 0.173 0.181 a1 2.49 2.69 0.098 0.106 b 0.7 0.93 0.027 0.036 b2 1.14 1.7 0.044 0.067 c 0.45 0.60 0.017 0.023 c2 1.21 1.36 0.047 0.053 d 8.95 9.35 0.352 0.368 e 10 10.4 0.393 0.409 g 4.88 5.28 0.192 0.208 l 15 15.85 0.590 0.106 l2 1.27 1.4 0.050 0.055 d 2 pak/a mecha nical data
ld1084 series 17/17 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no res ponsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result f rom its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specificati ons mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devi ces or systems without express written approval of stmicroelectronics. ? the st logo is a registered trademark of stmicroelectronics ? 2002 stmicroelectronics - printed in italy - all rights reserved stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany - hong kong - india - israel - italy - japan - malaysia - malt a - morocco singapore - spain - sweden - switzerland - united kingdom - united states. ? http://www.st.com

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