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?2001 fairchild semiconductor corporation www.fairchildsemi.com rev. 1.0.1 features ? output current up to 100ma ? no external components ? internal thermal over load protection ? internal short circuit current limiting ? output voltage offered in 5% tolerance ? output voltage of -5v, -8v, -12v, -15v, -18v and -24v description these regulators employ internal current limiting and ther- mal shutdown, making them essentially indestructible. to-92 1.gnd 2.input 3.output 1 8-sop sot-89 1 1 1. output 2.3.6.7. gnd 4.5. nc 8. input internal block diagram output input ka79lxxa 3-terminal 0.1a negative voltage regulator
ka79lxxa 2 absolute maximum ratings electrical characteristics(ka79l05a) (v i = -10v, i o = 40ma, c i = 0.33 f, c o = 0.1 f, 0 c t j +125 c, unless otherwise specified) note 1. load and line regulation are specified at constant junction temperature. change in v o due to heating effects must be taken into account separately. pulse testing with low duty is used. parameter symbol value unit input voltage (for v o = -5v to -8v) (for v o = -12v to -18v) (for v o = -24v) v i -30 -35 -40 v operating temperature range t opr 0 ~ +125 c storage temperature range t stg -65 ~ +150 c parameter symbol conditions min. typ. max. unit output voltage v o t j = +25 c - 4.8 - 5.0 - 5.2 v line regulation (note1) ? v o t j =+25 c -7.0v v i -20v - 15 150 mv -8v v i -20v - - 100 mv load regulation (note1) ? v o t j =+25 c 1.0ma i o 100ma -2060mv 1.0ma i o 40ma - 10 30 mv output voltage v o -7.0v v i -20v, 1.0ma i o 40ma - 4.75 - - 5.25 v v i = -10v, 1.0ma i o 70ma - 4.75 - - 5.25 v quiescent current i q t j =+ 25 c-2.05.5 ma t j = +125 c--6.0 quiescent current change with line ? i q -8v v i -20v - - 1.5 ma with load ? i q 1.0ma i o 40ma - - 0.1 ma output noise voltage v n t a = +25 c,10hz f 100khz - 30 - v ripple rejection rr f = 120hz, -8v v i -18v t j = +25 c 41 60 - db dropout voltage v d t j = +25 c-1.7-v
ka79lxxa 3 electrical characteristics (ka79l08a) (v i = -14v, i o = 40ma, c i = 0.33 f, c o = 0.1 f, 0 c t j +125 c, unless otherwise specified) note 1. load and line regulation are specified at constant junction temperature. change in v o due to heating effects must be taken into account separately. pulse testing with low duty is used. parameter symbol conditions min. typ. max. unit output voltage v o t j = +25 c - 7.7 - 8.0 - 8.3 v line regulation (note1) ? v o t j =+25 c -10.3v v i -23v - - 175 mv -12v v i -23v - - 125 mv load regulation (note1) ? v o t j =+25 c 1.0ma i o 100ma - - 80 mv 1.0ma i o 40ma - - 40 mv output voltage v o -10.3v v i -23v, 1.0ma i o 40ma - 7.6 - - 8.4 v v i = -14v, 1.0ma i o 70ma - 7.6 - - 8.4 quiescent current i q t j =+ 25 c--6.0 ma t j = +125 c--5.5 quiescent current change with line ? i q -11.7v v i -23v - - 1.5 ma with load 1.0ma i o 40ma - - 0.1 ma output noise voltage v n t j = +25 c,10hz f 100khz - 50 - v ripple rejection rr f = 120hz, -11v v i -21v t j = +25 c 39 55 - db dropout voltage v d t j = +25 c-1.7-v
ka79lxxa 4 electrical characteristics(ka79l12a) (v i = -19v, i o = 40ma, c i = 0.33 f, c o = 0.1 f, 0 c t j +125 c, unless otherwise specified) note 1. load and line regulation are specified at constant junction temperature. change in v o due to heating effects must be taken into account separately. pulse testing with low duty is used. parameter symbol conditions min. typ. max. unit output voltage v o t j = +25 c -11.5 -12.0 -12.5 v line regulation (note1) ? v o t j = +25 c -14.5v v i -27v - - 250 mv -16v v i -27v - - 200 mv load regulation (note1) ? v o t j = +25 c 1.0ma i o 100ma - - 100 mv 1.0ma i o 40ma - - 50 mv output voltage v o -14.5v > v i > -27v, 1.0ma i o 40ma -11.4 - -12.6 v v i = -19v, 1.0ma i o 70ma -11.4 - -12.6 v quiescent current i q t j = +25 c--6.0 ma t j = +125 c--6.5 quiescent current change with line ? i q -16v v i -27v - - 1.5 ma with load ? i q 1.0ma i o 40ma - - 0.1 ma output noise voltage v n t a = +25 c,10hz f 100khz - 80 - v ripple rejection rr f = 120hz, -15v v i -25v t j = +25 c 37 42 - db dropout voltage v d t j = +25 c-1.7-v
ka79lxxa 5 electrical characteristics(ka79l15a) (v i = -23v, i o = 40ma, c i = 0.33 f, c o = 0.1 f, 0 c t j +125 c, unless otherwise specified) note 1. load and line regulation are specified at constant junction temperature. change in v o due to heating effects must be taken into account separately. pulse testing with low duty is used. parameter symbol conditions min. typ. max. unit output voltage v o t j = +25 c -14.4 -15.0 -15.6 v line regulation (note1) ? v o t j = +25 c -17.5v v i -30v - - 300 mv -20v v i -30v - - 250 mv load regulation (note1) ? v o t j = +25 c 1.0ma i o 100ma - - 150 mv 1.0ma i o 40ma - - 75 mv output voltage v o -17.5v v i -30v, 1.0ma i o 40ma -14.25 - -15.75 v v i = -23v, 1.0ma i o 70ma -14.25 - -15.75 v quiescent current i q t j = +25 c--6.0 ma t j = +125 c--6.5 quiescent current change with line ? i q -20v v i -30v - - 1.5 ma with load ? i q 1.0ma i o 40ma - - 0.1 ma output noise voltage v n t a = +25 c,10hz f 100khz - 90 - v ripple rejection rr f = 120hz, -18.5v v i -28.5v t j = +25 c 34 39 - db dropout voltage v d t j = +25 c-1.7-v
ka79lxxa 6 electrical characteristics(ka79l18a) (v i = -27v, i o = 40ma, c i = 0.33 f, c o = 0.1 f, 0 c t j +125 c, unless otherwise specified) note 1. load and line regulation are specified at constant junction temperature. change in v o due to heating effects must be taken into account separately. pulse testing with low duty is used. parameter symbol conditions min. typ. max. unit output voltage v o t j = +25 c -17.3 -18.0 -18.7 v line regulation (note1) ? v o t j = +25 c -20.7v v i -33v - - 325 mv -21v v i -33v - - 275 mv load regulation (note1) ? v o t j = +25 c 1.0ma i o 100ma - - 170 mv 1.0ma i o 40ma - - 85 mv output voltage v o -20.7v > v i > -33v, 1.0ma i o 40ma -17.1 - -18.9 v v i = -27v, 1.0ma i o 70ma -17.1 - -18.9 v quiescent current i q t j = +25 c--6.5 ma t j = +125 c--6.0 quiescent current change with line ? i q -21v v i -33v - - 1.5 ma with load ? i q 1.0ma i o 40ma - - 0.1 ma output noise voltage v n t a =+25 c,10hz f 100khz - 150 - v ripple rejection rr f = 120hz, -23v v i -33v t j = +25 c 33 48 - db dropout voltage v d t j = +25 c-1.7-v
ka79lxxa 7 electrical characteristics(ka79l24a) (v i = -33v, i o = 40ma, c i = 0.33 f, c o = 0.1 f, 0 c t j +125 c, unless otherwise specified) note 1. load and line regulation are specified at constant junction temperature. change in v o due to heating effects must be taken into account separately. pulse testing with low duty is used. parameter symbol conditions min. typ. max. unit output voltage v o t j = +25 c -23 -24 -25 v line regulation (note1) ? v o t j = +25 c -27v v i -38v - - 350 mv -28v v i -38v - - 300 mv load regulation (note1) ? v o t j = +25 c 1.0ma i o 100ma - - 200 mv 1.0ma i o 40ma - - 100 mv output voltage v o -27v v i -38v, 1.0ma i o 40ma -22.8 - -25.2 v v i = -33v, 1.0ma i o 70ma -22.8 - -25.2 v quiescent current i q t j = +25 c--6.5 ma t j = +125 c--6.0 quiescent current change with line ? i q -28v v i -38v - - 1.5 ma with load ? i q 1.0ma i o 40ma - - 0.1 ma output noise voltage v n t a = +25 c,10hz f 100khz - 200 - v ripple rejection rr f = 120hz, -29v v i -35v t j = +25 c 31 47 - db dropout voltage v d t j = +25 c-1.7-v
ka79lxxa 8 typical application design considerations the ka79lxxa series of fixed voltage regulators are designed with thermal overload protection that shuts down the circuit when subjected to an excessive power overload condition. internal short circuit protection that limits the maximum current the circuit will pass. in many low current applications, compensation capacitors are not required. however, it is recommended that the regulator input be bypassed with a capacitor if the regulator is connected to the power supply filter with long wire lengths, or if the output load capacitance is large. an input bypass capacitor should be selected to provide good high frequenc y characteristics to insure stable operation under all load conditions. a 0.33 f or larger tantalum, mylar, or other capacitor hav- ing low internal impedance at high frequencies should be chosen. the bypass capacitor should be mounted with the shortest possible leads directly across the regulator's input terminals. normally good construction techniques should be used to mini- mize ground loops and lead resistance drops since the regulator has no external sense lead. bypassing the output is also recom- mended. a common ground is required between the input and the output voltages. the input voltage must remain typically 2.0v above the output voltage even during the low point on the input ripple voltage. * c 1 is required if regulator is located an appreciable distance from power supply filter. * c o improves stability and transient response. figure 1. positive and negative regulator figure 2. typical application i
ka79lxxa 9 mechanical dimensions package 0.46 0.10 1.27typ (r2.29) 3.86max [1.27 0.20 ] 1.27typ [1.27 0.20 ] 3.60 0.20 14.47 0.40 1.02 0.10 (0.25) 4.58 0.20 4.58 +0.25 ?.15 0.38 +0.10 ?.05 0.38 +0.10 ?.05 to-92
ka79lxxa 10 mechanical dimensions (continued) package 4.92 0.20 0.194 0.008 0.41 0.10 0.016 0.004 1.27 0.050 5.72 0.225 1.55 0.20 0.061 0.008 0.1~0.25 0.004~0.001 6.00 0.30 0.236 0.012 3.95 0.20 0.156 0.008 0.50 0.20 0.020 0.008 5.13 0.202 max #1 #4 #5 0~8 #8 0.56 0.022 () 1.80 0.071 max0.10 max0.004 max min + 0 10 -0 05 0.15 + 0 004 -0 002 0.006 8-sop
ka79lxxa 11 mechanical dimensions (continued) package sot-89 0.40 0.05 0.50
ka79lxxa 12 ordering information product number package operating temperature ka79l05az to-92 0 ~ + 125 c KA79L08AZ ka79l12az ka79l15az ka79l18az ka79l24az ka79l05ad 8-sop ka79l05am sot-89
ka79lxxa 13
ka79lxxa 6/11/01 0.0m 001 stock#dsxxxxxxxx ?

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