gs1117 vishay semiconductors formerly general semiconductor document number 74802 www.vishay.com 20-feb-02 1 new product 800ma low dropout positive adjustable regulator description the gs1117 is a low dropout three terminal regulator with 800ma output current capability. the output voltage is adjustable with the use of a resistor divider. for fixed out- put voltage versions, the output voltage is internally set at 2.5v, 2.85v, 3.3v or 5v. dropout is guaranteed at a maxi- mum of 1.4v at maximum output current. its low dropout voltage and fast transient response make it ideal for low voltage microprocessor applications. internal thermal limiting provides protection against any overload condition that would create excessive junction temperatures. applications ?scsi-2 active terminator ?post regulator for switching supply ?battery chargers ?constant-current regulators ?pc add-on card mechanical data case: to-220ab, to-263ab (d 2 pak), to-252 (dpak) and sot-223 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 1.2v at 800ma output current fast transient response line regulation typically at 0.015% load regulation typically at 0.1% internal thermal limiting adjustable output voltage or fixed 2.5v, 2.85v, 3.3v, 5v standard 3-pin power packages to-220ab to-263ab (d 2 pak) gs1117ct gs1117cm gs1117ce to-252 (dpak) 1 2 3 1 2 3 1 2 3 gs1117cst sot-223 1 2 3 pin definition 1. adjust/gnd. 2. v out (tab) 3. v in
gs1117 vishay semiconductors formerly general semiconductor www.vishay.com document number 74802 2 20-feb-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 junction to case to-220ab 3.0 to-252 r jc 8.0 c/w to-263ab 3.0 sot-223 15.0 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 v 0 c t j 125 c 1.225 1.250 1.275 v reference voltage v ref 2.65v v in 7v 10ma i o 800ma gs1117-2.5, v in = 5v 2.48 2.5 2.53 v gs1117-2.85, v in = 5v 2.82 2.85 2.88 v gs1117-3.3, v in = 5v 3.26 3.30 3.33 v output voltage v out gs1117-5, v in = 7v 4.95 5.00 5.05 v gs1117 0.98v n v n 1.02v n v 0 c t j 125 c 2.65v v in 7v 10ma i o 800ma 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 0.02 0.2 % v o 10ma i o 800ma load regulation reg load t j = 25 c 0.1 0.3 % v o 0 c t j 125 c 0.2 0.4 % v o 0 c t j 125 c i o = 800ma 1.2 1.4 v dropout voltage v drop i o = 500ma 1.19 1.35 v i o = 100ma 1.15 1.30 v 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: gs1117-2.5 (3.9v -7.0v), gs1117-2.85 (4.25v - 7.0v), gs1117 - 3.3 (4.75v - 7.0v), gs1117-5 (6.4v - 7.0v). (2) to maintain the specified junction temperatures, low duty cycle pulse testing is required for most parameters.
gs1117 vishay semiconductors formerly general semiconductor document number 74802 www.vishay.com 20-feb-02 3 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 output current i o 0 c t j 125 c 0.85 a 2.65 vin 7v adjust pin current i adj 10ma i o 800ma 55 120 a 0 c t j 125 c 2.65 vin 7v adjust pin current change ? i adj 10ma i o 800ma 0.2 5 a 0 c t j 125 c temperature stability t s i o = 0.5a 0.8 %v o 0 c t j 125 c minimum load current i lmin 0 c t j 125 c 3 10 ma adjustable version quiescent current i q 0 c t j 125 c1014ma 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: 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% gs1117 adjustable voltage regulator + + v in 5v v out c1 10 f c2 10 f 1 32 gs1117-2.5 gs1117-2.85 gs1117-3.3 gs1117-5 fixed voltage regulator + + 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. (2) to maintain the specified junction temperatures, low duty cycle pulse testing is required for most parameters.
gs1117 vishay semiconductors formerly general semiconductor www.vishay.com document number 74802 4 20-feb-02 ratings and characteristic curves (t a = 25 c unless otherwise noted) 1.15 1.20 1.25 1.30 1.10 1.05 20 40 60 80 100 120 140 fig. 2 ?dropout voltage v.s. temperature dropout voltage (v) ambient 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 --1.2 --1.6 --0.8 --0.4 0.0 0.4 0.8 1.2 1.6 --20 0 20 40 60 80 100 120 140 fig. 5 ?temperature stability output voltage deviation (%) temperature ( c) i out = 800ma 200 400 800 1000 600 fig. 1 ?dropout voltage minimum differential voltage (v) output current (ma) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 0 12 456 3 fig. 3 ?minimum load current (adjustable version) minimum operating current (ma) input / output differential voltage (v) 1 2 3 4 5 0 100 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 i out = 0.5a t j = 0 c t j = 25 c c out = 25 f c out = 25 f c out = 10 f c out = 10 f t j = 125 c t j = 0 c t j = 50 c t j = 125 c
gs1117 vishay semiconductors formerly general semiconductor document number 74802 www.vishay.com 20-feb-02 5 --0.1 0.4a 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 gs1117 cxx -xxx output voltage default: adj. 2.5: 2.5v 2.85: 2.85v 3.3: 3.3v 5: 5.0v package type st: sot-223 t: to-220 m: to-263 e: to-252 ordering information ratings and characteristic curves (t a = 25 c unless otherwise noted)
gs1117 vishay semiconductors formerly general semiconductor www.vishay.com document number 74802 6 20-feb-02 case outlines 3.15 2.90 6.80 6.30 top view 7.30 6.70 3.70 3.30 0.80 0.60 12 3 1.80 max. 13 3 0.12 0.02 2.30 ty p. 0.35 0.24 0.91 min. sot-223 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 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 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)
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