six1084 vishay formerly general semiconductor document number 74800 www.vishay.com 26-mar-02 1 new product 5a low dropout positive adjustable regulator description the six1084 is a low dropout three terminal regulator with 5a output current capability. the output voltage is adjustable with the use of a resistor divider. for fixed output voltage ver- sions, the output v oltage is internally set at 1.8v, 2.5v, or 3.3v. dropout is guaranteed at a maximum of 1.4v at max- imum output current. its low dropout voltage and fast tran- sient response make it ideal for low v oltage microprocessor applications. internal current and thermal limiting provides protection against any over load condition that would create excessive junction temperatures. applications ?post regulator for switching supply ?microprocessor power supplies ?constant-current regulators ?motherboard i/o power supplies mechanical data case: to-220ab, to-263ab (d 2 pak), to-252 (dpak) high temperature soldering guaranteed: 260?/10 seconds at terminals case outlines are on the back page + + -- for fixed voltage device thermal limit current amp current limit gm v out v in adj gnd v ref 1.25v 55 a functional block diagram features dropout voltage 1.3v at 5a output current fast transient response line regulation typically at 0.015% load regulation typically at 0.1% internal thermal and current limiting adjustable output voltage or fixed 1.8v, 2.5v, 3.3v standard 3-pin power packages to-220ab to-263ab (d 2 pak) six1084ct six1084cm six1084ce to-252 (dpak) 1 2 3 1 2 3 1 2 3 pin definition 1. adjust/gnd. 2. v out (tab) 3. v in
six1084 vishay formerly general semiconductor www.vishay.com document number 74800 2 26-mar-02 maximum ratings and thermal characteristics (t a = 25 c unless otherwise noted) parameter symbol value unit vin pin to adj/gnd pin vin 7 v thermal resistance to-220ab 3.0 junction to case to-252 r jc 8.0 c/w to-263ab 3.0 operating junction temperature range t j 0 to +125 c storage temperature range t stg 65 to 150 c electrical characteristics (1) t j = 25 c (2) , v in = 5v, i o = 10ma unless otherwise noted. parameter symbol test conditions min typ max unit t j = 25 c 1.238 1.250 1.262 reference voltage v ref 0 c t j 125 c 1.225 1.250 1.275 v 2.65v v in 7v 10ma i o 5a six1084-1.8 v in = 5v 1.78 1.8 1.82 six1084-2.5 v in = 5v 2.47 2.5 2.53 output voltage v out six1084-3.3 v in = 7v 3.26 3.3 3.33 v six1084 0.98v n v n 1.02v n 0 c t j 125 c 2.65v v in 7v 10ma i o 5a 2.65v v in 7v line regulation reg line t j = 25 c 0.015 0.2 % v o 0 c t j 125 c 0.035 0.2 10ma i o 5a load regulation reg load t j = 25 c 0.1 0.3 % v o 0 c t j 125 c 0.2 0.4 0 c t j 125 c dropout voltage v drop i o = 5a 1.3 1.4 v i o = 3a 1.23 1.32 i o = 1a 1.15 1.25 output current i o 0 c t j 125 c 5.0 6.0 a 2.65 vin 7v adjust pin current i adj 10ma i o 5a 55 120 a 0 c t j 125 c 2.65 vin 7v adjust pin current change ? i adj 10ma i o 5a 0.2 5 a 0 c t j 125 c temperature stability t s i o = 0.5a, 0 c t j 125 c 0.8 %v o min. load current adjustable version i lmin 0 c t j 125 c 310ma
six1084 vishay formerly general semiconductor document number 74800 www.vishay.com 26-mar-02 3 electrical characteristics (con?.) (1) t j = 25 c (2) , v in = 5v, i o = 10ma unless otherwise noted. parameter symbol test conditions min typ max unit quiescent current i q 0 c t j 125 c 10 14 ma fixed voltage version rms output noise n 10h z f 10 kh z 0.003 %v o ripple rejection ratio rr f = 120 h z , c o = 25 f 60 68 db c adj = 25 f thermal regulation r th t a = 25 c, 30ms pulse 0.02 0.05 %/w long term stability t a = 125 c, 1000 hrs 0.3 %v o notes: (1) all parameters, except nominal output voltage are specified for the variable voltage version, allowing a wider v in range. the specified limits also apply for the fixed voltage versions over the allowable input voltage range: six1084-1.8 (3.2v - 7.0v) , six1084-2.5 (3.9v - 7.0v), six1084-3.3 (4.75v - 7.0v). (2) to maintain the specified junction temperatures, low duty cycle pulse testing is required for most parameters. notes: v ref = v out v adj = 1.25v (typ.) v out = v ref x (1+r2/r1) + i adj x r2 i adj = 55 a (typ.) (1) c1 needed if device is far away from filter capacitors (2) c2 required for stability typical application circuit v in 5v v out 3.3v c1 10 f c2 10 f adj v ref 1 32 r1 125 ? 1% r2 205 ? 1% six1084 adjustable voltage regulator + + v in 5v v out c1 10 f c2 10 f 1 32 six1084-1.8 six1084-2.5 six1084-3.3 fixed voltage regulator + +
six1084 vishay formerly general semiconductor www.vishay.com document number 74800 4 26-mar-02 --0.10 0.10 --0.05 0.05 0 --0.15 --0.20 20 40 60 80 100 120 fig. 2 load regulation vs. temperature output voltage deviation (%) temperature ( c) 0 20 40 60 80 100 --50 --25 0 25 50 75 100 125 fig. 4 adjust pin current adjust pin current ( a) temperature ( c) 0 --1.6 --1.2 --0.8 --0.4 0.4 0.8 0.0 1.2 1.6 --20 0 20 40 60 80 100 120 140 fig. 5 temperature stability output voltage deviation (%) temperature ( c) i out = 0.5a i out = 5a 12 45 3 minimum input/output differential (v) output current (a) 0 0.4 0.8 1.2 1.6 2.0 0 100 1k 100k 10k 1m fig. 6 ripple rejection (with c adj 25 f) ripple rejection (db) frequency (hz) 20 30 40 50 60 70 80 10 12 456 3 fig. 3 minimum load current (adjustable version) minimum operating current (ma) input / output differential voltage (v) 1 2 3 4 5 0 t j = 0 c t j = 25 c t j = 125 c fig. 1 dropout voltage vs. output current t j = 25 c t j = 125 c c out = 25 f c out = 25 f c out = 10 f c out = 10 f ratings and characteristic curves (t a = 25 c unless otherwise noted)
six1084 vishay formerly general semiconductor document number 74800 www.vishay.com 26-mar-02 5 --0.1 2.5a 0.1a --0.05 0 0.05 0.1 40 80 120 160 200 fig. 7 load transient response load current output voltage (v, ac) time ( s) 0 v in = 5v c in = 1 f c out = 10 f (tantalum) v out = 3.3v --100 7.0 6.0 --5 0 0 50 10 20 30 40 50 fig. 8 line transient response input voltage (v) output voltage (mv, ac) time ( s) 0 c out = 10 f (tantalum) v out = 3.3v six1084cxx xxx package type t: to-220 m: to-263 e: to-252 output voltage default: adj. 1.8: 1.8v 2.5: 2.5v 3.3: 3.3v ordering information ratings and characteristic curves (t a = 25 c unless otherwise noted)
six1084 vishay formerly general semiconductor www.vishay.com document number 74800 6 26-mar-02 dimensions in millimeters 9.65 10.29 8.63 9.66 14.60 15.88 1 23 4.06 4.83 1.14 1.40 0.7 (max.) 2.28 2.80 0.50 1.00 1.14 1.40 2.54 (typ.) 1.40 (max.) to-263 case outline 10.66 9.66 6.35 max. 3.42 2.54 4.08 3.54 6.85 5.85 16.51 14.23 14.73 12.70 1.77 1.15 1.01 0.38 2.79 2.29 (with plating) 4.82 3.56 1.39 0.51 1.14 0.31 2.92 2.04 (with plating) to-252 (dpak) 5.59 5.33 10.42 9.40 5.46 5.21 6.73 6.35 0.58 0.46 2.38 2.19 2.28 (typ.) 0.88 0.64 1 3 2 1.27 1.02 0.51 (min.) to-220 case outline case outlines
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