december 2005 / b http://takcheong.com 1 licensed by on semiconductor , a trademark of semiconductor components industries, llc for zener technology and products . tak cheon g ? 500 mw do-35 hermetically sealed glass zener voltage regulators maximum ratings (note 1) rating symbol value units maximum steady state power dissipation @ tl 75 , lead length = 3/8? derate above 75 p d 500 4.0 mw mw/ operating and storage temperature range t j , t stg -65 to +200 c note 1: some part number series have lower jedec registered ratings. specification features: ? zener voltage range = 2.4v to 200v ? esd rating of clas 3 (>6 kv) per human body model ? do-35 package (do-204ah) ? double slug type construction ? metallurgical bonded construction specification features: case : double slug type, hermetically sealed glass finish : all external surfaces are corrosion re sistant and leads are readily solderable polarity : cathode indicated by polarity band mounting: any maximum lead temperature for soldering purposes 230 , 1/16? from the case for 10 seconds ordering information device package quantity bzx79cxxx axial lead 3000 units / box bzx79cxxxrl axial lead 5000 units / tape & reel bzx79cxxxrl2* axial lead 5000 units / tape & reel bzx79cxxxrr1 ! lead form 3000 units / radial tape & reel bzx79cxxxrr2 i lead form 3000 units / radial tape & reel bzx79cxxxta axial lead 5000 units / tape & ammo bzx79cxxxta2* axial lead 5000 units / tape & ammo bzx79cxxxra1 ! axial lead 3000 units / radial tape & ammo bzx79cxxxra2 i axial lead 3000 units / radial tape & ammo * the ?2? suffix refer to 26mm tape spacing. ! ?1?: polarity band up with cathode lead off first. i ?2?: polarity band down with cathode lead off first. bzx79c2v4 through bzx79c200 series cathode anode l = logo 79cxxx = bzx79cxxx device code l 79c xxx devices listed in bold italic are tak cheong preferred devices. preferred devices are recommended choices for future use and best overall value. axial lead do35
http://takcheong.com 2 bzx79c2v4 through bzx79c200 series electrical characterization ( t a = 25c unless otherwise noted, vf = 1.5v max @ i f = 100ma for all types) symbol parameter v z reverse zener voltage @ i zt i zt reverse current z zt maximum zener impedance @ i zt v br temperature coefficient of v br (typical) i r reverse leakage current @ v r v r reverse voltage i f forward current v f forward voltage @ i f c capacitance (typical) electrical characterization ( t a = 25c unless otherwise noted, vf = 1.5v max @ i f = 100ma for all types) leakage current v br v z @ i zt (volts) (note 3.) max zener impedance (note 4.) i zt @ i zt i zt i r @ v r (mv/ ) c v z =0, f=1.0mhz device (note 2.) device marking min max ( ) (ma) (ua) (volts) min max (pf) bzx79c2v4 bzx79c2v7 bzx79c3v0 bzx79c3v3 bzx79c3v6 79c2v4 79c2v7 79c3v0 79c3v3 79c3v6 2.2 2.5 2.8 3.1 3.4 2.6 2.9 3.2 3.5 3.8 100 100 95 95 90 5 5 5 5 5 100 75 50 25 15 1 1 1 1 1 -3.5 -3.5 -3.5 -3.5 -3.5 0 0 0 0 0 255 230 215 200 185 bzx79c3v9 bzx79c4v3 bzx79c4v7 bzx79c5v1 bzx79c5v6 79c3v9 79c4v3 79c4v7 79c5v1 79c5v6 3.7 4 4.4 4.8 5.2 4.1 4.6 5 5.4 6 90 90 80 60 40 5 5 5 5 5 10 5 3 2 1 1 1 2 2 2 -3.5 -3.5 -3.5 -2.7 -2 0.3 1 0.2 1.2 2.5 175 160 130 110 95 bzx79c6v2 bzx79c6v8 bzx79c7v5 bzx79c8v2 bzx79c9v1 79c6v2 79c6v8 79c7v5 79c8v2 79c9v1 5.8 6.4 7 7.7 8.5 6.6 7.2 7.9 8.7 9.6 10 15 15 15 15 5 5 5 5 5 3 2 1 0.7 0.5 4 4 5 5 6 0.4 1.2 2.5 3.2 3.8 3.7 4.5 5.3 6.2 7 90 85 80 75 70 bzx79c10 bzx79c11 bzx79c12 bzx79c13 bzx79c15 79c10 79c11 79c12 79c13 79c15 9.4 10.4 11.4 12.4 13.8 10.6 11.6 12.7 14.1 15.6 20 20 25 30 30 5 5 5 5 5 0.2 0.1 0.1 0.1 0.05 7 8 8 8 10.5 4.5 5.4 6 7 9.2 8 9 10 11 13 70 65 65 60 55 2. tolerance and voltage designation tolerance designation ? the type numbers listed have zener voltage min/max limits as shown. 3. reverse zener voltage (v z ) reverse zener voltage is measured under pulse conditions such at t j is no more than 2 above t a . 4. zener impedance (z z ) derivation z zt and z zk are measured by dividing the ac voltage drop across the devic e by the ac current applied. the specified limits are for i z(ac) = 0.1 i z(dc) with ac frequency = 60hz. v i v f i f v r i r v z i zt zener voltage regulator
bzx79c2v4 through bzx79c200 series http://www.takcheong.com 2 electrical characteristics (t a = 25oc unless otherwise noted. v f = 1.5 v max @ i f = 100ma for all types) symbol parameter v z reverse zener voltage @ i zt i zt reverse zener current z zt maximum zener impedance @ i zt v br temperature coefficient of v br (typical) i r reverse leakage current @ v r v r reverse voltage i f forward current v f forward voltage @ i f c capacitance (typical) electrical characteristics (t a = 25c unless otherwise noted, v f = 1.5 v max @ i f = 100ma for all types) leakage current ? v br v z @ i zt (volts) (note 3.) max zener impedance (note 4) z zt @ i zt i zt i r @ v r (mv/oc) c v z = 0, f = 1.0mhz device (note 2.) device marking min max ( ? ?? ? )(ma)( ? a) (volts) min max (pf) bzx79c2v4 79c2v4 2.2 2 .6 100 5 100 1 -3.5 0 255 bzx79c2v7 79c2v7 2.5 2.9 100 5 75 1 -3.5 0 230 bzx79c3v0 79c3v0 2.8 3.2 95 5 50 1 -3.5 0 215 bzx79c3v3 79c3v3 3.1 3.5 95 5 25 1 -3.5 0 200 bzx7c3v6 7c3v6 3.4 3.8 90 5 15 1 -3.5 0 185 bzx79c3v9 79c3v9 3.7 4.1 90 5 10 1 -3.5 0.3 175 bzx79c4v3 79c4v3 4 4.6 90 5 5 1 -3.5 1 160 bzx79c4v7 79c4v7 4.4 5 80 5 3 2 -3.5 0.2 130 bzx79c5v1 79c5v1 4.8 5.4 60 5 2 2 -2.7 1.2 110 bzx79c5v6 79c5v6 5.2 6 40 5 1 2 -2 2.5 95 bzx79c6v2 79c6v2 5.8 6.6 10 5 3 4 0.4 3.7 90 bzx79c6v8 79c6v8 6.4 7.2 15 5 2 4 1.2 4.5 85 bzx79c7v5 79c7v5 7 7.9 15 5 1 5 2.5 5.3 8 bzx79c8v2 79c8v2 7.7 8.7 15 5 0.7 5 3.2 6.2 75 bzx79c9v1 79c9v1 8.5 9.6 15 5 0.5 6 3.8 7 70 bzx79c10 79c10 9.4 10.6 20 5 0.2 7 4.5 8 70 bzx79c11 79c11 10.4 11.6 20 5 0.1 8 5.4 9 65 bzx79c12 79c12 11.4 12.7 25 5 0.1 8 6 10 65 bzx79c13 79c13 12.4 14.1 30 5 0.1 8 7 11 60 bzx79c15 79c15 13.8 15.6 30 5 0.05 10.5 9.2 13 55 2. tolerance and voltage designation tolerance designation ? the type numbers listed have zener voltage min/max limits as shown. 3. reverse zener voltage (v z ) reverse zener voltage is measured under pulse conditions such that t j is no more than 2oc above t a . 4. zener impedance (z z ) derivation z zt and z zk are measured by dividing the ac voltage drop across the device by the ac current applied. the specified limits are for i z(ac) = 0.1 i z(dc) with ac frequency = 60hz.
bzx79c2v4 through bzx79c200 series http://www.takcheong.com 3 electrical characteristics (t a = 25c unless otherwise noted, v f = 1.5 v max @ i f = 100ma for all types) leakage current ? v br v z @ i zt (volts) (note 3.) max zener impedance (note 4) z zt @ i zt i zt i r @ v r (mv/oc) c v z = 0, f = 1.0mhz device (note 2.) device marking min max ( ? ?? ? )(ma)( ? a) (volts) min max (pf) bzx79c16 79c16 15.3 17.1 40 5 0 .05 11.2 10.4 1 4 5 2 bzx79c18 79c18 16.8 19.1 45 5 0.05 12.6 12.9 16 47 bzx79c20 79c20 18.8 21.2 55 5 0.05 14 14.4 18 36 bzx79c22 79c22 20.8 23.3 55 5 0.05 15.4 16.4 20 34 bzx79c24 79c24 22.8 25.6 70 5 0.05 16.8 18.4 22 33 bzx79c27 79c27 25.1 28.9 80 2 0.05 18.9 23.5 30 bzx79c30 79c30 28 32 80 2 0.05 21 26 27 bzx79c33 79c33 31 35 80 2 0.05 23.1 29 25 bzx79c36 79c36 34 38 90 2 0.05 25.2 31 23 bzx79c39 79c39 37 41 130 2 0.05 27.3 34 21 bzx79c43 79c43 40 46 150 2 0.05 30.1 37 21 bzx79c47 79c47 44 50 170 2 0.05 32.9 40 19 bzx79c51 79c51 48 54 180 2 0.05 35.7 44 19 bzx79c56 79c56 52 60 200 2 0.05 39.2 47 18 bzx79c62 79c62 58 66 215 2 0.05 43.4 51 17 bzx79c68 79c68 64 72 240 2 0.05 47.6 56 17 bzx79c75 79c75 70 79 255 2 0.05 52.5 60 16.5 bzx79c82 79c82 77 87 280 2 0.1 62 46 95 29 bzx79c91 79c91 85 96 300 2 0.1 69 51 107 28 bzx79c100 79c100 94 106 500 1 0.1 76 57 119 27 bzx79c110 79c110 104 116 650 1 0.1 84 63 131 26 bzx79c120 79c120 114 127 800 1 0.1 91 69 144 24 bzx79c130 79c130 124 141 950 1 0.1 99 75 158 23 bzx79c150 79c150 138 156 1250 1 0.1 114 87 185 21 bzx79c160 79c160 153 171 1400 1 0.1 122 93 200 20 bzx79c180 79c180 168 191 1700 1 0.1 137 105 228 18 bzx79c200 79c200 188 212 2000 1 0.1 152 120 255 17 2. tolerance and voltage designation tolerance designation ? the type numbers listed have zener voltage min/max limits as shown. 3. reverse zener voltage (v z ) reverse zener voltage is measured under pulse conditions such that t j is no more than 2oc above t a . 4. zener impedance (z z ) derivation z zt and z zk are measured by dividing the ac voltage drop across the device by the ac current applied. the specified limits are for i z(ac) = 0.1 i z(dc) with ac frequency = 60hz.
bzx79c2v4 through bzx79c200 series http://www.takcheong.com 4 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 20 40 60 80 100 120 140 160 180 200 t l , lead temperature ( c) figure 1. steady state power derating heat sinks 3/8" 3/8" p d , maximum steady state power dissipation (watts)
bzx79c2v4 through bzx79c200 series http://www.takcheong.com 5 application note - zener voltage since the actual voltage available from a given zener diode is temperature dependent, it is necessary to determine junction temperature under any set of operating conditions in order to calculate its value. the following procedure is recommended: lead temperature, t l , should be determined from: t l = la p d + t a . la is the lead-to-ambient thermal resistance ( c/w) and p d is the power dissipation. the value for la will vary and depends on the device mounting method. la is generally 30 to 40 c/w for the various clips and tie points in common use and for printed circuit board wiring. the temperature of the lead can also be measured using a thermocouple placed on the lead as close as possible to the tie point. the thermal mass connected to the tie point is normally large enough so that it will not significantly respond to heat surges generated in the diode as a result of pulsed operation once steady-state conditions are achieved. using the measured value of t l , the junction temperature may be determined by: t j = t l + ? t jl . ? t jl is the increase in junction temperature above the lead temperature and may be found from figure 2 for dc power: ? t jl = jl p d . for worst-case design, using expected limits of i z , limits of p d and the extremes of t j ( ? t j ) may be estimated. changes in voltage, v z , can then be found from: ? v = vz t j . vz , the zener voltage temperature coefficient, is found from figures 4 and 5. under high power-pulse operation, the zener voltage will vary with time and may also be affected significantly by the zener resistance. for best regulation, keep current excursions as low as possible. surge limitations are given in figure 7. they are lower than would be expected by considering only junction temperature, as current crowding effects cause temperatures to be extremely high in small spots, resulting in device degradation should the limits of figure 7 be exceeded. ll 500 400 300 200 100 0 0 0.2 0.4 0.6 0.8 1 2.4-60 v 62-20 0 v l , lead length to heat sink (inch) jl , junction t o lead therma l resistanc e ( c/w) figure 2. typical thermal resistance typical leakage current at 80% of nominal breakdown voltage +2 5 c +12 5 c 1000 7000 5000 2000 1000 700 500 200 100 70 50 20 10 7 5 2 1 0.7 0.5 0.2 0.1 0.07 0.05 0.02 0.01 0.007 0.005 0.002 0.001 34 5 6 7 8 9101112 v z , nominal zener voltage (volts ) i , leakage current ( a) r figure 3. typical leakage current 13 14 15
bzx79c2v4 through bzx79c200 series http://www.takcheong.com 6 +12 +10 +8 +6 +4 +2 0 -2 -4 89 v z , zener voltage (volts) figure 4a. range for units to 12 volts v z @i zt (note 2) range temperature coefficients (-55 c to +150 c temperature range; 90% of the units are in the ranges indicated.) 100 70 50 30 20 10 7 5 3 2 1 2 6 1 0 2 0 3 0 5 0 7 0 100 v z , zener voltage (volts) figure 4b. range for units 12 to 100 volts range v z @i z (note 2) 120 130 140 150 160 170 180 190 200 200 180 160 140 120 100 v z , zener voltage (volts) figure 4c. range for units 120 to 200 volts v z @ i zt (note 2) +6 +4 +2 0 -2 -4 34 v z , zener vo l t age (vo l ts) figure 5. effect of zener current note: below 3 volts and above 8 vol ts note: changes in zener current do not note: affect temperature coefficients 1ma 0.01ma v z @ i z t a = 2 5 c 1000 c, cap acit ance (pf) 500 200 100 50 20 10 5 2 1 1 2 5 10 20 50 100 v z , zener voltage (volts) figure 6a. typical capacitance 2.4-100 volts t a = 2 5 c 0v bias 1v bias 50% of v z bias 100 70 50 30 20 10 7 5 3 2 1 120 140 160 180 190 200 220 v z , zener voltage (volts) figure 6b. typical capacitance 120-200 volts t = 2 5 c 1 volt bias 50% of v bias 0 bias v z , tempera ture coefficient (mv/ c) 20ma c, cap acit ance (pf) v z , temperature coefficient (mv/ c) v z , temperature coefficient (mv/ c) v z , tempera ture coefficient (mv/ c) 3 45 710 11 12 5 6 7 8
bzx79c2v4 through bzx79c200 series http://www.takcheong.com 7 100 70 50 30 20 10 7 5 3 2 1 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 20 50 100 200 500 1000 p p k , peak surge power ( w a tts) p w , pulse width (ms) 5% duty cycle 10% duty cycle 20% duty cycle 11v-91v nonrepetitive 1.8v-10v nonrepetitive rect angular waveform t j = 25 c prior to initial pulse figure 7a. maximum surge power 1.8-91 volts 1000 700 500 300 200 100 70 50 30 20 10 7 5 3 2 1 0.01 0.1 1 10 100 1000 p pk , peak surge power (watts) pw, pulse width (ms) figure 7b. maximum surge power do- 35 100-200volts 1000 500 200 100 50 20 10 1 2 5 0.1 0.2 0.5 1 2 5 10 20 50 100 i z , zener current (ma) figure 8. effect of zener current on zener impedance z z , dynamic impedance (ohms) z z , dynamic impedance (ohms) 1000 700 500 200 100 70 50 20 10 7 5 2 1 1 2 3 5 7 10 20 30 50 70 100 v z , zener voltage (volts) figure 9. effect of zener v oltage on zener impedance figure 10. t ypical forward characteristics rect angular waveform, tj = 25 c 100-20 0 vo l ts nonrepetitive t j = 2 5 c i z (rms) = 0.1 i z (dc) f = 60hz i z =1ma 5ma 20ma t j = 2 5 c i z (rms ) = 0.1 i z (dc) f = 60 hz v z = 2.7v 47v 27v 6.2v v f , for ward voltage (volts) 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1000 500 200 100 50 20 10 5 2 1 i f , for ward current (ma) minimum maximum 150 c 75 c 0 c 25 c
bzx79c2v4 through bzx79c200 series http://www.takcheong.com 8 figure 1 1. zener voltage versus zener current - v z = 1 thru 16 volts v z , zener voltage (volts) i z , zener current (ma) 20 10 1 0.1 0.01 12 5 78910111213141516 t a = 2 5 c figure 12. zener voltage versus zener current - v z = 15 thru 30 volts v z , zener vo l t age (vo l ts) 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 10 1 0.1 0.01 t a = 2 5 c i z , zener current (ma) 6 34
bzx79c2v4 through bzx79c200 series http://www.takcheong.com 9 figure 13. zener voltage versus zener current - v z = 30 thru 105 volts v z , zener voltage (volts) 10 1 0.1 0.01 30 35 40 45 50 55 60 70 75 80 85 90 95 100 figure 14. zener voltage versus zener current - v z = 110 thru 220 volts v z , zener voltage (volts) 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 10 1 0.1 0.01 t a = 2 5 65 105 i z , zener current (ma) i z , zener current (ma)
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