mc79l05a / lm79l05a ? 3-terminal 0.1 a negative voltage regulator ? 2004 fairchild semiconductor corporation www.fairchildsemi.com mc79l05a / lm79l05a rev. 1.1.0 1 december 2012 mc79l05a / lm79l05a 3-terminal 0.1 a negative voltage regulator features ? output current up to 100 ma ? no external components ? internal thermal over load protection ? internal short-circuit current limiting ? output voltage offered in 5% tolerance ? output voltage: -5 v ordering information block diagram figure 1. block diagram part number operating tem- perature range top mark package packing method MC79L05ACHX 0 ~ +125 c 9a sot-89 tape and reel mc79l05acp mc79l05acp to-92 bulk lm79l05acz lm79l05acz to-92 bulk q1 q2 q3 q4 q5 q6 q7 q8 q9 q10 q11 q12 q13 q14 q15 q16 q17 r1 r2 r3 r4 r5 r6 r7 r15 r16 r17 r18 r26 r22 r24 r25 r29 r r28 r23+r21 r27 d3 d2 d1 c1 gnd output input description these regulators employ internal current limiting and thermal shutdown. to-92 1.gnd 2.input 3.output 1 sot-89 1
mc79l05a / lm79l05a ? 3-terminal 0.1 a negative voltage regulator ? 2004 fairchild semiconductor corporation www.fairchildsemi.com mc79l05a / lm79l05a rev. 1.1.0 2 absolute maximum ratings stresses exceeding the absolute maximum ratings may damage the device. the device may not function or be opera- ble above the recommended operating conditions and stressing the parts to these levels is not recommended. in addi- tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. the absolute maximum ratings are stress ratings only. values are at t a = 25c unless otherwise noted. electrical characteristics v i = -10 v, i o = 40 ma, c i = 0.33 f, c o = 0.1 f, 0 c t j +125c, unless otherwise specified. note: 1. load and line regulation are specified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty is used. symbol parameter value unit v i input voltage -30 v t opr operating temperature range 0 ~ +125 c t stg storage temperature range -65 ~ +150 c symbol parameter conditions min. typ. max. unit v o output voltage t j = +25 c -4.8 -5.0 -5.2 v v o line regulation (1) t j =+25 c -7.0 v v i -20 v 15 150 mv -8 v v i -20 v 100 mv v o load regulation (1) t j =+25 c 1.0 ma i o 100 ma 20 60 mv 1.0 ma i o 40 ma 10 30 mv v o output voltage -7.0 v v i -20 v, 1.0 ma i o 40 ma -4.75 -5.25 v v i = -10 v, 1.0 ma i o 70 ma -4.75 -5.25 v i q quiescent current t j = +25 c2.05.5 ma t j = +125 c6.0 i q quiescent current change with line -8 v v i -20 v 1.5 ma i q with load 1.0 ma i o 40 ma 0.1 ma v n output noise voltage t a = +25 c,10 hz f 100 khz 30 v rr ripple rejection f = 120 hz, -8 v v i -18 v, t j = +25 c41 60 db v d dropout voltage t j = +25 c1.7v
mc79l05a / lm79l05a ? 3-terminal 0.1 a negative voltage regulator ? 2004 fairchild semiconductor corporation www.fairchildsemi.com mc79l05a / lm79l05a rev. 1.1.0 3 typical application design considerations the mc79l05a / lc79l05a 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 limits the maxi- mum current the circuit will pass. in many low-current applications, compensation capacitors are not required. how- ever, 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-frequency characteristics to ensure stable operation under all load conditions. a 0.33 f or larger tantalum, mylar, or other capacitor having 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. good construction techniques should be used to minimize ground loops and lead resistance drops since the regulator has no external sense lead. bypassing the output is also recommended. a common ground is required between the input and the output voltages. the input voltage must remain typically 2.0 v above the output voltage, even during the low point on the input ripple voltage. * c i is required if regulator is located an appreciable distance from power supply filter. ** c o improves stability and transient response. figure 2. positive and negative regulator figure 3. typical application lm78l05a mc78l05a lm79l05a mc79l05a i mc79l05a lm79l05a
mc79l05a / lm79l05a ? 3-terminal 0.1 a negative voltage regulator ? 2004 fairchild semiconductor corporation www.fairchildsemi.com mc79l05a / lm79l05a rev. 1.1.0 4 physical dimensions figure 4. 3-lead, sot-89, jedec to-243, option aa package drawings are provided as a service to customers considering fairchild components. drawings may change in any manner without notice. please note the revision and/or date on the drawing and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package specifications do not expand the terms of fairchild?s worldwide terms and conditions, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ . for current tape and reel specifications, visit fairchild semiconductor?s online packaging area: http://www.fairchildsemi.com/products/discrete/pdf/sot89_tr.pdf . sot-89 2.00 min 0.50 45 x 5.30 min 1.50 2.23 min 0.96 min 0.90 min 2x 3.00 min 90 4.50 3.90 c 1.30 0.89 0.54 1.50 0.52 0.30 (2x) c 4.70 4.30 c 1.87 1.50 c 1.40 2.70 2.30 c 3.00 0.30 45 x 123 1 3 0.10 m c ab a b 1.70 1.30 c seating plane c 2.70 0.35 0.60 0.40 c 0.50 0.35 2.29 2.13 notes: unless otherwise specified. a. reference to jedec to-243 variation aa. b. all dimensions are in millimeters. c does not comply jedec standard value. d. dimensions are exclusive of burrs, mold flash and tie bar protrusion. e. dimension and tolerance as per asme y14.5-1994. f. drawing file name: ma03crev2 land pattern recommendation c l symm 13 2
mc79l05a / lm79l05a ? 3-terminal 0.1 a negative voltage regulator ? 2004 fairchild semiconductor corporation www.fairchildsemi.com mc79l05a / lm79l05a rev. 1.1.0 5 physical dimensions (continued) figure 5. 3-lead, to-92, molded, standard straight lead package drawings are provided as a service to customers considering fairchild components. drawings may change in any manner without notice. please note the revision and/or date on the drawing and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package specifications do not expand the terms of fairchild?s worldwide terms and conditions, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ . d to-92 bulk type
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