100 ma negative voltage regulators the mc79l00, a series negative voltage regulators are inexpensive, easytouse devices suitable for numerous applications requiring up to100 ma. like the higher powered mc7900 series negative regulators, this series features thermal shutdown and current limiting, making them remarkably rugged. in most applications, no external components are required for operation. the mc79l00 devices are useful for oncard regulation or any other application where a regulated negative voltage at a modest current level is needed. these regulators offer substantial advantage over the common resistor/zener diode approach. ? no external components required ? internal short circuit current limiting ? internal thermal overload protection ? low cost ? complementary positive regulators offered (mc78l00 series) ? available in either 5% (ac) or 10% (c) selections representative schematic diagram *automotive temperature range selections are available with special test conditions and additional tests in 5, 12 and 15 v devices. contact your local on semiconductor sales office for information. r1 r2 z1 r3 r 5 r18 q1 r6 q4 r7 r4 r8 q5 q10 q8 r9 q14 q9 c q6 r10 r11 q7 q2 q11 r14 r15 q13 q12 r16 r17 gnd output input on semiconductor ? semiconductor components industries, llc, 2002 january, 2002 rev. 4 1 publication order number: mc79l00/d mc79l00, mc79l00a series threeterminal low current negative fixed voltage regulators ordering information p suffix plastic package case 29 pin 1. ground 2. input 3. output 3 1 2 d suffix plastic package case 751 (sop8)* 1 8 pin 1. v out 2. v in 3. v in 4. nc 5. gnd 6. v in 7. v in 8. nc *sop8 is an internally modified so8 package. pins 2, 3, 6, and 7 are electrically common to the die attach flag. this internal lead frame modifica- tion decreases package thermal resistance and increases power dissipation capability when appropriately mounted on a printed circuit board. sop8 conforms to all external dimensions of the standard so8 package. device no. 10% mc79l05c mc79l12c mc79l15c mc79l18c mc79l24c device no. 5% nominal voltage mc79l05ac mc79l12ac mc79l15ac mc79l18ac mc79l24ac 5.0 12 15 18 24 device operating temperature range package MC79LXXAcd* t j = 0 to +125 c sop8 plastic power MC79LXXAcp plastic power mc79lxxcp MC79LXXAbd* MC79LXXAbp* sop8 plastic power t j = 40 to +125 c xx indicates nominal voltage semiconductor technical data
mc79l00, mc79l00a series http://onsemi.com 2 maximum ratings (t a = +25 c, unless otherwise noted.) rating symbol value unit input v oltage (5 v) input v oltage (12, 15, 18 v) input v oltage (24 v) v i 30 35 40 vdc storage temperature range t stg 65 to +150 c junction temperature t j +150 c electrical characteristics (v i = 10 v, i o = 40 ma, c i = 0.33 m f, c o = 0.1 m f, 40 c < t j +125 c (for MC79LXXAb), 0 c < t j < +125 c (for MC79LXXAc)). mc79l05c, ab mc79l05ac, ab characteristics symbol min typ max min typ max unit output voltage (t j = +25 c) v o 4.6 5.0 5.4 4.8 5.0 5.2 vdc input regulation (t j = +25 c) 7.0 vdc v i 20 vdc 8.0 vdc v i 20 vdc reg line 200 150 150 100 mv load regulation t j = +25 c, 1.0 ma i o 100 ma 1.0 ma i o 40 ma reg load 60 30 60 30 mv output voltage 7.0 vdc v i 20 vdc, 1.0 ma i o 40 ma v i = 10 vdc, 1.0 ma i o 70 ma v o 4.5 4.5 5.5 5.5 4.75 4.75 5.25 5.25 vdc input bias current (t j = +25 c) (t j = +125 c) i ib 6.0 5.5 6.0 5.5 ma input bias current change 8.0 vdc v i 20 vdc 1.0 ma i o 40 ma i ib 1.5 0.2 1.5 0.1 ma output noise voltage (t a = +25 c, 10 hz f 100 khz) v n 40 40 m v ripple rejection (8.0 v i 18 vdc, f = 120 hz, t j = +25 c) rr 40 49 41 49 db dropout voltage (i o = 40 ma, t j = +25 c) |v i v o | 1.7 1.7 vdc electrical characteristics (v i = 19 v, i o = 40 ma, c i = 0.33 m f, c o = 0.1 m f, 40 c < t j +125 c (for MC79LXXAc), 0 c < t j < +125 c (for MC79LXXAb)). mc79l12c, ab mc79l12ac, ab characteristics symbol min typ max min typ max unit output voltage (t j = +25 c) v o 11.1 12 12.9 11.5 12 12.5 vdc input regulation (t j = +25 c) 14.5 vdc v i 27 vdc 16 vdc v i 27 vdc reg line 250 200 250 200 mv load regulation t j = +25 c, 1.0 ma i o 100 ma 1.0 ma i o 40 ma reg load 100 50 100 50 mv output voltage 14.5 vdc v i 27 vdc, 1.0 ma i o 40 ma v i = 19 vdc, 1.0 ma i o 70 ma v o 10.8 10.8 13.2 13.2 11.4 11.4 12.6 12.6 vdc input bias current (t j = +25 c) (t j = +125 c) i ib 6.5 6.0 6.5 6.0 ma input bias current change 16 vdc v i 27 vdc 1.0 ma i o 40 ma i ib 1.5 0.2 1.5 0.2 ma output noise voltage (t a = +25 c, 10 hz f 100 khz) v n 80 80 m v ripple rejection (15 v i 25 vdc, f = 120 hz, t j = +25 c) rr 36 42 37 42 db dropout voltage (i o = 40 ma, t j = +25 c) |v i v o | 1.7 1.7 vdc
mc79l00, mc79l00a series http://onsemi.com 3 electrical characteristics (v i = 23 v, i o = 40 ma, c i = 0.33 m f, c o = 0.1 m f, 40 c < t j +125 c (for MC79LXXAb), 0 c < t j < +125 c (for MC79LXXAc)). mc79l15c mc79l15ac, ab characteristics symbol min typ max min typ max unit output voltage (t j = +25 c) v o 13.8 15 16.2 14.4 15 15.6 vdc input regulation (t j = +25 c) 17.5 vdc v i 30 vdc 20 vdc v i 30 vdc reg line 300 250 300 250 mv load regulation t j = +25 c, 1.0 ma i o 100 ma 1.0 ma i o 40 ma reg load 150 75 150 75 mv output voltage 17.5 vdc v i vdc, 1.0 ma i o 40 ma v i = 23 vdc, 1.0 ma i o 70 ma v o 13.5 13.5 16.5 16.5 14.25 14.25 15.75 15.75 vdc input bias current (t j = +25 c) (t j = +125 c) i ib 6.5 6.0 6.5 6.0 ma input bias current change 20 vdc v i 30 vdc 1.0 ma i o 40 ma d i ib 1.5 0.2 1.5 0.1 ma output noise voltage (t a = +25 c, 10 hz f 100 khz) v n 90 90 m v ripple rejection (18.5 v i 28.5 vdc, f = 120 hz) rr 33 39 34 39 db dropout voltage i o = 40 ma, t j = +25 c |v i v o | 1.7 1.7 vdc electrical characteristics (v i = 27 v, i o = 40 ma, c i = 0.33 m f, c o = 0.1 m f, 0 c < t j > +125 c, unless otherwise noted). mc79l18c mc79l18ac characteristics symbol min typ max min typ max unit output voltage (t j = +25 c) v o 16.6 18 19.4 17.3 18 18.7 vdc input regulation (t j = +25 c) 20.7 vdc v i 33 vdc 21.4 vdc v i 33 vdc 22 vdc v i 33 vdc 21 vdc v i 33 vdc reg line 325 275 325 275 mv load regulation t j = +25 c, 1.0 ma i o 100 ma 1.0 ma i o 40 ma reg load 170 85 170 85 mv output voltage 20.7 vdc v i 33 vdc, 1.0 ma i o 40 ma 21.4 vdc v i 33 vdc, 1.0 ma i o 40 ma v i = 27 vdc, 1.0 ma i o 70 ma v o 16.2 16.2 19.8 19.8 17.1 17.1 18.9 18.9 vdc input bias current (t j = +25 c) (t j = +125 c) i ib 6.5 6.0 6.5 6.0 ma input bias current change 21 vdc v i 33 vdc 27 vdc v i 33 vdc 1.0 ma i o 40 ma i ib 1.5 0.2 1.5 0.1 ma output noise voltage (t a = +25 c, 10 hz f 100 khz) v n 150 150 m v ripple rejection (23 v i 33 vdc, f = 120 hz, t j = +25 c) rr 32 46 33 48 db dropout voltage i o = 40 ma, t j = +25 c |v i v o| 1.7 1.7 vdc
mc79l00, mc79l00a series http://onsemi.com 4 electrical characteristics (v i = 33 v, i o = 40 ma, c i = 0.33 m f, c o = 0.1 m f, 0 c < t j < +125 c, unless otherwise noted). mc79l24c mc79l24ac characteristics symbol min typ max min typ max unit output voltage (t j = +25 c) v o 22.1 24 25.9 23 24 25 vdc input regulation (t j = +25 c) 27 vdc v i 38 vdc 27.5 vdc v i 38 vdc 28 vdc v i 38 vdc reg line 350 300 350 300 mv load regulation t j = +25 c, 1.0 ma i o 100 ma 1.0 ma i o 40 ma reg load 200 100 200 100 mv output voltage 27 vdc v i 38 v, 1.0 ma i o 40 ma 28 vdc v i 38 vdc, 1.0 ma i o 40 ma v i = 33 vdc, 1.0 ma i o 70 ma v o 21.4 21.4 26.4 26.4 22.8 22.8 25.2 25.2 vdc input bias current (t j = +25 c) (t j = +125 c) i ib 6.5 6.0 6.5 6.0 ma input bias current change 28 vdc v i 38 vdc 1.0 ma i o 40 ma d i ib 1.5 0.2 1.5 0.1 ma output noise voltage (t a = +25 c, 10 hz f 100 khz) v n 200 200 m v ripple rejection (29 v i 35 vdc, f = 120 hz, t j = +25 c) rr 30 43 31 47 db dropout voltage i o = 40 ma, t j = +25 c |v i v o | 1.7 1.7 vdc applications information design considerations the mc79l00, a series of fixed voltage regulators are designed with thermal overload protections 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 length, or if the output load capacitance is large. an input bypass capacitor should be selected to provide good highfrequency characteristics to insure stable operation under all load conditions. a 0.33 m 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. normally 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. figure 1. positive and negative regulator figure 2. standard application +v in +v o 0.1 m f -v in -v o 0.33 m f mc78lxx mc79lxx 0.1 m f 0.33 m f input output c o ** 0.1 m f c i * 0.33 m f mc79lxx 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 ripple voltage. * c i is required if regulator is located an appreciable * distance from the power supply filter ** c o improves stability and transient response.
mc79l00, mc79l00a series http://onsemi.com 5 typical characteristics (t a = +25 c, unless otherwise noted.) i ib , input bias current (ma) i ib , input bias current (ma) v o , output voltage (v) figure 3. dropout characteristics figure 4. dropout voltage versus junction temperature figure 5. input bias current versus ambient temperature figure 6. input bias current versus input voltage figure 7. maximum average power dissipation versus ambient temperature (to92) 8.0 6.0 4.0 2.0 0 0 -2.0 -4.0 -6.0 -0.8 -10 v in , input voltage (v) mc79l05c v o = -5.0 v t j = 25 c i o = 1.0 ma i o = 100 ma i o = 40 ma -2.5 -2.0 -1.5 -1.0 -0.5 0 0 25 50 75 100 125 , input/output differential voltage (v) io t j , junction temperature ( c) i o = 70 ma -v v 4.0 4.2 3.8 3.6 3.4 3.2 3.0 0 0 25 50 75 100 125 t a , ambient temperature ( c) mc79l05c v in = -10 v v o = -5.0 v i o = 40 ma 5.0 4.0 3.0 2.0 1.0 0 0 -5.0 -10 -15 -20 -25 -30 -35 -40 v in , input voltage (v) mc79l05c v o = -5.0 v i o = 40 ma 10,000 1,000 100 10 , power dissipation (mw) d t a , ambient temperature ( c) 25 50 75 100 125 150 p no heatsink r q ja = 200 c/w p d(max) to 25 c = 625 mw figure 8. sop8 thermal resistance and maximum power dissipation versus p.c.b. copper length 30 50 70 90 110 130 150 0.4 0.8 1.2 1.6 2.0 2.4 2.8 0203050 40 10 l, length of copper (mm) 170 3.2 p d(max) for t a = +50 c r q ja p d , maximum power dissipation (w) ??? ??? ??? ??? ??? ??? 2.0 oz. copper graph represents symmetrical layout 3.0 mm l l i o = 40 ma i o = 1.0 ma junction-to-air ( c/w) r ja , thermal resistance q dropout of regulation is defined when d v o = 2% of v o
mc79l00, mc79l00a series http://onsemi.com 6 package dimensions p suffix plastic package case 2911 issue al notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. contour of package beyond dimension r is uncontrolled. 4. lead dimension is uncontrolled in p and beyond dimension k minimum. r a p j l b k g h section xx c v d n n xx seating plane dim min max min max millimeters inches a 0.175 0.205 4.45 5.20 b 0.170 0.210 4.32 5.33 c 0.125 0.165 3.18 4.19 d 0.016 0.021 0.407 0.533 g 0.045 0.055 1.15 1.39 h 0.095 0.105 2.42 2.66 j 0.015 0.020 0.39 0.50 k 0.500 --- 12.70 --- l 0.250 --- 6.35 --- n 0.080 0.105 2.04 2.66 p --- 0.100 --- 2.54 r 0.115 --- 2.93 --- v 0.135 --- 3.43 --- 1
mc79l00, mc79l00a series http://onsemi.com 7 package dimensions d suffix plastic package case 75107 issue w seating plane 1 4 5 8 n j x 45 k notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension a and b do not include mold protrusion. 4. maximum mold protrusion 0.15 (0.006) per side. 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.127 (0.005) total in excess of the d dimension at maximum material condition. a b s d h c 0.10 (0.004) dim a min max min max inches 4.80 5.00 0.189 0.197 millimeters b 3.80 4.00 0.150 0.157 c 1.35 1.75 0.053 0.069 d 0.33 0.51 0.013 0.020 g 1.27 bsc 0.050 bsc h 0.10 0.25 0.004 0.010 j 0.19 0.25 0.007 0.010 k 0.40 1.27 0.016 0.050 m 0 8 0 8 n 0.25 0.50 0.010 0.020 s 5.80 6.20 0.228 0.244 x y g m y m 0.25 (0.010) z y m 0.25 (0.010) z s x s m
mc79l00, mc79l00a series http://onsemi.com 8 on semiconductor and are trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. atypicalo parameters which may be provided in scill c data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into t he body, or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indem nify and hold scillc and its of ficers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and re asonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized u se, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employ er. publication ordering information japan : on semiconductor, japan customer focus center 4321 nishigotanda, shinagawaku, tokyo, japan 1410031 phone : 81357402700 email : r14525@onsemi.com on semiconductor website : http://onsemi.com for additional information, please contact your local sales representative. mc79l00/d literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 3036752175 or 8003443860 toll free usa/canada fax : 3036752176 or 8003443867 toll free usa/canada email : onlit@hibbertco.com n. american technical support : 8002829855 toll free usa/canada
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