gs1117 vishay siliconix document number 74802 www.vishay.com 04-feb-05 1 1a low dropout positive adjustable regulator description the gs1117 is a low dropout three terminal regulator with 1a 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 1.8v, 2.5v, 2.85v, 3.3v or 5v. dropout is guaranteed at a maximum of 1.3v 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: 260c/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 50 a functional block diagram features ? dropout voltage 1.1v at 1a output current ? fast transient response ? line regulation typically at 0.04% ? load regulation typically at 0.1% ? internal thermal limiting ? adjustable output voltage or fixed 1.8v, 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 siliconix www.vishay.com document number 74802 2 04-feb-05 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 ?20 to +125 c storage temperature range t stg ?65 to 150 c electrical characteristics t j = 25 c , i o = 10 ma ? 1 a, v in = 4.75v ? 7v, unless otherwise noted. parameter symbol test conditions test limits unit v in i o t j min typ max output voltage (1) v o 5 v 10 ma 0.99 v n v n 1.01 v n fixed voltage 0 c t j 125 c 0.97 v n 1.03 v n v reference voltage (1) v ref 5 v 10 ma 1.238 1.250 1.262 adj voltage 0 c t j 125 c 1.225 1.275 line regulation (1) reg (line) 10 ma 0.03 0.3 0 c t j 125 c 0.035 0.35 %/v o load regulation (1) reg (load) 5 v 0.1 0.3 0 c t j 125 c 0.2 0.5 dropout voltage v drop 1a 1.15 1.3 v ? v out = 1% 500ma 0 c t j 125 c 1.05 1.15 100ma 1.0 1.1 current limit i cl 5 v 1.0 1.1 a quiescent current i q 5 v 12 14 ma fixed model temperature coefficient t c 5 v 0.5 a 0 c t j 125 c 0.005 %v o /c adjust pin current i adj 55 120 a adjust pin current change ? i adj 0.2 5 minimum load current i o 5 v 5 14 ma adjustable version rms output noise (2) v n 5 v 0.003 %v o ripple rejection ratio (3) r r 5 v 10 ma 0 c t j 125 c 6 0 7 2 d b notes: (1) low duty cycle pulse testing with kelvin connections required.. (2) bandwidth of 10 h z to 10 kh z . (3) 120 h z input ripple (c adj for adj) = 25 f.
gs1117 vishay siliconix document number 74802 www.vishay.com 04-feb-05 3 notes: v ref = v out ? v adj = 1.25v (typ.) v out = v ref x (1+r2/r1) + i adj x r2 i adj = 50 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% g s 111 7 adjustable voltage regulator + + v in 5v v out c1 10 f c2 10 f 1 32 gs1117-xx fixed voltage regulator + +
gs1117 vishay siliconix www.vishay.com document number 74802 4 04-feb-05 ratings and characteristic curves (t a = 25c unless otherwise noted) 1.0 1.1 1.2 1.3 0.9 0.8 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 --0.9 --0.6 --0.3 0.0 0.6 0.9 1.2 --20 0 20 40 60 80 100 120 140 fig. 5 ? temperature stability output voltage deviation (%) temperature ( c) i out = 1 a 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 0 12 456 3 fig. 3 ? minimum load current (adjustable version) minimum operating current (ma) input / output differential voltage (v) 2 4 6 8 10 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 0.3 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 siliconix document number 74802 www.vishay.com 04-feb-05 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 ratings and characteristic curves (t a = 25c unless otherwise noted) ordering information part number output voltage (v) package gs1117cst/2f-e3 adjustable gs1117cst-18/2f-e3 1.8 gs1117cst-25/2f-e3 2.5 sot-223 gs1117cst-28/2f-e3 2.85 gs1117cst-33/2f-e3 3.3 gs1117cst-5/2f-e3 5.0 gs1117ce/27h adjustable gs1117ce-1.8/27h 1.8 gs1117ce-2.5/27h 2.5 to-252 gs1117ce-2.85/27h 2.85 dpak gs1117ce-3.3/27h 3.3 gs1117ce-5/27h 5.0 gs1117cm/31f-e3 adjustable gs1117cm-18/31f-e3 1.8 gs1117cm-25/31f-e3 2.5 to-263 gs1117cm-28/31f-e3 2.85 dpak gs1117cm-33/31f-e3 3.3 gs1117cm-5/31f-e3 5.0 gs1117ct/45h adjustable gs1117ct-1.8/45h 1.8 gs1117ct-2.5/45h 2.5 gs1117ct-2.85/45h 2.85 to-220 gs1117ct-3.3/45h 3.3 gs1117ct-5/45h 5.0
gs1117 vishay siliconix www.vishay.com document number 74802 6 04-feb-05 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 14.60 15.88 9.65 10.29 4.06 4.83 1.40 (max.) 8.28 9.65 2.54 (typ.) 1.15 1.39 0.74 (max.) 0.51 0.99 1.12 1.40 2.79 (max.) 0.25 (typ.) 0 ~ 8 to-263-3l 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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