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? semiconductor components industries, llc, 2016 june, 2016 ? rev. 14 1 publication order number: ncp431/d ncp431a, sc431a, ncp431b, sc431b, ncp432b, sc432b series programmable precision references the ncp431/ncp432 integrated circuits are three?terminal programmable shunt regulator diodes. these monolithic ic voltage references operate as a low temperature coefficient zener which is programmable from vref to 36 v using two external resistors. these devices exhibit a wide operating current range of 40 a to 100 ma with a typical dynamic impedance of 0.22 . the characteristics of these references make them excellent replacements for zener diodes in many applications such as digital voltmeters, power supplies, and op amp circuitry. the 2.5 v reference makes it convenient to obtain a stable reference from 5.0 v logic supplies, and since the ncp431/ ncp432 operates as a shunt regulator, it can be used as either a positive or negative voltage reference . low minimum operating current makes this device an ideal choice for secondary regulators in smps adapters with extremely low no?load consumption. features ? programmable output voltage to 36 v ? low minimum operating current: 40 a, typ @ 25 c ? voltage reference tolerance: 0.5%, typ @ 25 c (ncp431b/ncp432b) ? low dynamic output impedance, 0.22 typical ? sink current capability of 40 a to 100 ma ? equivalent full?range temperature coefficient of 50 ppm/ c typical ? temperature compensated for operation over full rated operating temperature range ? sc prefix for automotive and other applications requiring unique site and control change requirements; aec?q100 qualified and ppap capable ? these are pb?free devices typical applications ? voltage adapters ? switching power supply ? precision voltage reference ? charger ? instrumentation soic?8 nb d suffix case 751 www. onsemi.com see detailed ordering and shipping information in the package dimensions section on page 14 of this data sheet. ordering and marking information 1 8 to?92 lp suffix case 29?11 1 2 3 sot?23?3 sn suffix case 318 1 2 3 pin 1. reference 2. anode 3. cathode ncp431/sc431 pin 1. reference 2. cathode 3. anode reference anode anode nc cathode anode anode nc 1 (top view) ncp432/sc432 pin 1. cathode 2. reference 3. anode
ncp431a, sc431a, ncp431b, sc431b, ncp432b, sc432b series www. onsemi.com 2 cathode (k) reference (r) anode (a) figure 1. symbol cathode (k) reference (r) anode (a ) 2.5 v ref figure 2. representative block diagram this device contains 20 active transistors maximum ratings (full operating ambient temperature range applies, unless otherwise noted) symbol rating value unit v ka cathode to anode voltage 37 v i k cathode current range, continuous ?100 to +150 ma i ref reference input current range, continuous ?5 to +10 ma t j operating junction temperature 150 c t a operating ambient temperature range ?40 to +125 c t stg storage temperature range ?65 to +150 c p d total power dissipation @ t a = 25 c derate above 25 c ambient temperature d, lp suffix plastic package sn1 suffix plastic package 0.70 0.52 w p d total power dissipation @ t c = 25 c derate above 25 c case temperature d, lp suffix plastic package 1.5 w hbm cdm esd rating (note 1) human body model per jedec jesd22?a114f charged device model per jedec jesd22?c101e >2000 >1000 v stresses exceeding those listed in the maximum ratings table may damage the device. if any of these limits are exceeded, device function ality should not be assumed, damage may occur and reliability may be affected. 1. this device contains latch?up protection and exceeds 100 ma per jedec standard jesd78. recommended operating conditions symbol condition min max unit v ka cathode to anode voltage v ref 36 v i k cathode current 0.04 100 ma functional operation above the stresses listed in the recommended operating ranges is not implied. extended exposure to stresse s beyond the recommended operating ranges limits may affect device reliability. thermal characteristics symbol characteristic lp suffix package (50 mm 2 x 35 m cu) d suffix package (50 mm 2 x 35 m cu) sn suffix package (10 mm 2 x 35 m cu) unit r ja thermal resistance, junction?to?ambient 176 210 255 c/w r jl thermal resistance, junction?to?lead (lead 3) 75 68 80 c/w
ncp431a, sc431a, ncp431b, sc431b, ncp432b, sc432b series www. onsemi.com 3 electrical characteristics (t a = 25 c, unless otherwise noted.) symbo l characteristic ncp431ac ncp431ai ncp431av/ sc431av uni t min typ max min typ max min typ max v ref reference input voltage v ka = v ref , i k = 1 ma t a = 25 c t a = t low to t high (figure 3, note 2) 2.475 2.475 2.500 2.500 2.525 2.525 2.475 2.465 2.500 2.500 2.525 2.525 2.475 2.460 2.500 2.500 2.525 2.525 v v reft reference input voltage deviation over temperat- ure range (figure 3, notes 3, 4) v ka = v ref , i k = 1 ma ? ? ? ? 5.0 10 ? 10 15 mv v ref v ka ratio of change in reference input voltage to change in cathode to anode voltage i k = 1 ma (figure 4), v ka = 10 v to v ref v ka = 36 v to 10 v ? ? ?1.85 ?0.80 ?3.1 ?1.8 ? ? ?1.85 ?0.80 ?3.1 ?1.8 ? ? ?1.85 ?0.80 ?3.1 ?1.8 mv/ v i ref reference input current (figure 4) i k = 1 ma, r1 = 220 k, r2 = t a = ?40 c to +125 c ? 81 190 ? 81 190 ? 81 190 na i reft reference input current deviation over temperat- ure range (figure 4, note 3) i k = 1 ma, r1 = 10 k, r2 = ? 22 55 ? 22 55 ? 22 55 na i min minimum cathode current for regulation v ka = v ref (figure 3) ? 4 0 60 ? 4 0 60 ? 4 0 60 a i off off?state cathode current (figure 5) v ka = 36 v, v ref = 0 v ? 180 1000 ? 180 1000 ? 180 1000 na |z ka | dynamic impedance (figure 3, note 5) v ka = v ref , i k = 1.0 ma to 100 ma f 1.0 khz ? 0.22 0.5 ? 0.22 0.5 ? 0.22 0.5 2. t low = ?40 c for ncp431ai, ncp431av, sc431av = 0 c for ncp431ac t high = 70 c for ncp431ac = 85 c for ncp431ai = 125 c for ncp431av, sc431av 3. guaranteed by design 4. the deviation parameter v reft is defined as the difference between the maximum and minimum values obtained over the full operating ambient temperature range that applies. the average temperature coefficient of the reference input voltage, vref is defined as: v ref ppm c v ref v ref @25 c 10 6 t a v ref 10 6 t a v ref @25 c vref can be positive or negative depending on whether vref min or vref max occurs at the lower ambient temperature. example: v reft = 17 mv and slope is positive v ref = 2.5 v, t a = 165 c (from ?40 c to +125 c) v ref 0.017 10 6 165 2.5 41.2 ppm c 5. the dynamic impedance z ka is defined as: (|z ka | = ( v ka / i k ). when the device is programmed with two external resistors, r1 and r2, the total dynamic impedance of the circuit is defined as: |z ka ?|
|z ka | (1 + (r1/r2)). 6. sc431avsnt1g ? t low = ?40 c, t high = 125 c. guaranteed by design. sc prefix for automotive and other applications requiring unique site and control change requirements; aec?q100 qualified and ppap capable.
ncp431a, sc431a, ncp431b, sc431b, ncp432b, sc432b series www. onsemi.com 4 electrical characteristics (t a = 25 c, unless otherwise noted.) symbo l characteristic ncp431bc ncp432bc ncp431bi ncp432bi ncp/sc431bv ncp/sc432bv uni t min typ max min typ max min typ max v ref reference input voltage v ka = v ref , i k = 1 ma t a = 25 c t a = t low to t high (figure 3, note 7) 2.4875 2.4875 2.500 2.500 2.5125 2.5125 2.4875 2.4775 2.500 2.500 2.5125 2.5125 2.4875 2.4725 2.500 2.500 2.5125 2.5125 v v reft reference input voltage deviation over tem- perature range (figure 3, notes 8, 9) v ka = v ref , i k = 1 ma ? ? ? ? ? ? ? 5.0 10 1? ? ? 10 15 15 mv v ref v ka ratio of change in reference input voltage to change in cathode to anode voltage i k = 1 ma (figure 4), v ka = 10 v to v ref v ka = 36 v to 10 v ? ? ?1.85 ?0.80 ?3.1 ?1.8 ? ? ?1.85 ?0.80 ?3.1 ?1.8 ? ? ?1.85 ?0.80 ?3.1 ?1.8 mv/ v i ref reference input current (figure 4) i k = 1 ma, r1 = 220 k, r2 = t a = ?40 c to +125 c ? 81 190 ? 81 190 ? 81 190 na i reft reference input current deviation over tem- perature range (figure 4, note 8) i k = 1 ma, r1 = 10 k, r2 = ? 22 55 ? 22 55 ? 22 55 na i min minimum cathode current for regulation v ka = v ref (figure 3) ? 4 0 60 ? 4 0 60 ? 4 0 60 a i off off?state cathode current (figure 5) v ka = 36 v, v ref = 0 v ? 180 1000 ? 180 1000 ? 180 1000 na |z ka | dynamic impedance (figure 3, note 10) v ka = v ref , i k = 1.0 ma to 100 ma f 1.0 khz ? 0.22 0.5 ? 0.22 0.5 ? 0.22 0.5 7. t low = ?40 c for ncp431bi, ncp431bv, ncp432bi, ncp432bv, sc431b, sc432b = 0 c for ncp431bc, ncp432bc t high = 70 c for ncp431bc, ncp432bc = 85 c for ncp431bi, ncp432bi = 125 c for ncp431bv, ncp432bv, sc431bv, sc432bv 8. guaranteed by design 9. the deviation parameter v reft is defined as the difference between the maximum and minimum values obtained over the full operating ambient temperature range that applies. the average temperature coefficient of the reference input voltage, vref is defined as: v ref ppm c v ref v ref @25 c 10 6 t a v ref 10 6 t a v ref @25 c vref can be positive or negative depending on whether vref min or vref max occurs at the lower ambient temperature. example: v reft = 17 mv and slope is positive v ref = 2.5 v, t a = 165 c (from ?40 c to +125 c) v ref 0.017 10 6 165 2.5 41.2 ppm c 10. the dynamic impedance z ka is defined as: (|z ka | = ( v ka / i k ). when the device is programmed with two external resistors, r1 and r2, the total dynamic impedance of the circuit is defined as: |z ka ?|
|z ka | (1 + (r1/r2)) 11. SC431BVSNT1G, sc432bvsnt1g ? t low = ?40 c, t high = 125 c. guaranteed by design. sc prefix for automotive and other applica- tions requiring unique site and control change requirements; aec?q100 qualified and ppap capable. product parametric performance is indicated in the electrical characteristics for the listed test conditions, unless otherwise noted. product performance may not be indicated by the electrical characteristics if operated under different conditions.
ncp431a, sc431a, ncp431b, sc431b, ncp432b, sc432b series www. onsemi.com 5 input v ka vref figure 3. test circuit for v ka = v ref ik r2 r1 figure 4. test circuit for v ka > v ref input v ka iref vref ik input v ka i off figure 5. test circuit for i off v ka v ref 1 r1 r2 i ref r1 figure 6. cathode current versus cathode voltage figure 7. cathode current versus cathode voltage ?1.0 0.0 1.0 2.0 3.0 ?100.0 ?50.0 0.0 50.0 100.0 150.0 input v ka i k v ka = v ref t a = 25 c v ka , cathode voltage (v) i k , cathode current (ma) ?60.0 ?40.0 ?20.0 0.0 20.0 40.0 60.0 ?1.0 0.0 1.0 2.0 3 .0 v ka , cathode voltage (v) i k , cathode current ( a) input v ka i k v ka = v ref t a = 25 c i min figure 8. minimum cathode current regulation versus ambient temperature t a , ambient temperature ( c) i min , ( a) 80.00 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 ?50 125 100 75 ?25 0 25 50
ncp431a, sc431a, ncp431b, sc431b, ncp432b, sc432b series www. onsemi.com 6 figure 9. reference input voltage versus ambient temperature figure 10. reference input current versus ambient temperature 2460 2470 2480 2490 2500 2510 2520 2530 2540 ?50 ?25 0 25 50 75 100 125 t a , ambient temperature ( c) v ref , reference input voltage (mv) v ka input v ref i k v ka = v ref i k = 1 ma 40 50 60 70 80 90 100 110 120 ?50 ?25 0 25 50 75 100 125 i ref , reference input current (na) v ka input 220k i k i ref i k = 1 ma t a , ambient temperature ( c) figure 11. change in reference input voltage versus cathode voltage figure 12. off?state cathode current versus ambient temperature ?40 ?30 ?20 ?10 0 0 10203040 r2 r1 input v ka v ref i k v ref , reference input voltage (mv) v ka , cathode voltage (v) v ka = v ref i k = 1 ma 1 10 100 ?50 ?25 0 25 50 75 100 125 input v ka i off v ka =36v v ref =0v i off , off?state cathode current (na) t a , ambient temperature ( c) figure 13. dynamic impedance versus frequency figure 14. dynamic impedance versus ambient temperature 0.1 1 0.001 0.01 0.1 1 10 100 10 1.0 k gnd output i k 50 |z ka |, dynamic impedance ( ) f, frequency (mhz) i k = 1 ma to 100 ma t a = 25 c 0.200 0.220 0.240 0.260 0.280 0.300 0.320 ?50 ?25 0 25 50 75 100 125 t a , ambient temperature ( c) |z ka |, dynamic impedance ( ) 1. 0k gnd output i k 50 v ka =v ref i k = 1.0 ma to 100ma f<1.0 khz
ncp431a, sc431a, ncp431b, sc431b, ncp432b, sc432b series www. onsemi.com 7 figure 15. open?loop voltage gain versus frequency figure 16. spectral noise density ?10 0 10 20 30 40 50 60 1000 10k 100k 1m 10m 15k gnd output i k 8.25k 230 9.0 f i k = 100 a to 10 ma t a = 25 c a vol , open loop voltage gain (db) f, frequency (hz) 0 100 200 300 400 500 600 700 800 10 100 1000 10k 100 k v ka =v ref i k =1ma t a =25 c i k input v ka f, frequency (hz) noise voltage (nv/ hz ) 0 4.0 8.0 12 16 20 24 4.0 3.0 2.0 1.0 10 5.0 0 output input figure 17. pulse response figure 18. stability boundary conditions 28 32 36 40 220 gnd output 50 pulse generator f = 100khz input monitor voltage swing (v) t, time ( s) c l , load capacitance (nf) i k , cathode current (ma) figure 19. stability boundary conditions for small cathode current
ncp431a, sc431a, ncp431b, sc431b, ncp432b, sc432b series www. onsemi.com 8 150 v out c l i k v+ figure 20. test circuit for curve a of stability boundary conditions 10k 150 v out c l i k v+ figure 21. test circuit for curve b and c of stability boundary conditions
ncp431a, sc431a, ncp431b, sc431b, ncp432b, sc432b series www. onsemi.com 9 typical applications figure 22. shunt regulator r2 r1 v+ i k c l v out v out 1 r1 r2 v ref figure 23. high current shunt regulator v out 1 r1 r2 v ref r1 v out v+ figure 24. output control for a tree?terminal fixed regulator r2 r1 mc7805 common v+ in out v out v out 1 r1 r2 v ref v out(min) v ref 5.0 v r2 r1 v out v+ v out 1 r1 r2 v ref v in(min) v out v be v out(min) v ref figure 25. series pass regulator figure 26. constant current source r cl i out v+ i out v ref r cl i sink v ref r s v+ i sink r s figure 27. constant current sink r2
ncp431a, sc431a, ncp431b, sc431b, ncp432b, sc432b series www. onsemi.com 10 r2 r1 v+ v out v out (trip) 1 r1 r2 v ref figure 28. triac crowbar v out (trip) 1 r1 r2 v ref v+ r2 r1 v out figure 29. src crowbar figure 30. voltage monitoring v+ i r2 r1 r4 r3 v out lower limit 1 r1 r2 v ref upper limit 1 r3 r4 v ref l.e.d. indicator is ?on? when v+ is between the uppper and lower limits. v in < v ref v out v+ > v ref
2.0 v figure 31. single?supply comparator with temperature?compensated threshold v+ v out v th v ref v in r1 4.7 k vin = 10 to 20 v 4.7k v out = 5.0 v i out = 1.0 a mpsa20 1.0k 4.7k 2.2k 0.1 f 2200 f 10 1n5823 100k 51k 0.01 f 150 h @ 2.0 a 470 f tip115 figure 32. step?down switching converter
ncp431a, sc431a, ncp431b, sc431b, ncp432b, sc432b series www. onsemi.com 11 applications information the ncp431/ncp432 is a programmable precision reference which is used in a variety of ways. it serves as a reference voltage in circuits where a non?standard reference voltage is needed. other uses include feedback control for driving an optocoupler in power supplies, voltage monitor, constant current source, constant current sink and series pass regulator. in each of these applications, it is critical to maintain stability of the device at various operating currents and load capacitances. in some cases the circuit designer can estimate the stabilization capacitance from the stability boundary conditions curve provided in figure 18. however, these typical curves only provide stability information at specific cathode voltages and at a specific load condition. additional information is needed to determine the capacitance needed to optimize phase margin or allow for process variation. a simplified model of the ncp431/ncp432 is shown in figure 33. when tested for stability boundaries, the load resistance is 150 . the model reference input consists of an input transistor and a dc emitter resistance connected to the device anode. a dependent current source, gm, develops a current whose amplitude is determined by the difference between the 1.78 v internal reference voltage source and the input transistor emitter voltage. a portion of gm flows through compensation capacitance, cp2. the voltage across cp2 drives the output dependent current source, go, which is connected across the device cathode and anode. model component values are: vref = 1.78 v gm = 0.3 + 2.7 exp (?ic/26 ma) where ic is the device cathode current and gm is in mhos go = 1.25 (vcp2) mhos. resistor and capacitor typical values are shown on the model. process tolerances are 20% for resistors, 10% for capacitors, and 40% for transconductances. an examination of the device model reveals the location of circuit poles and zeroes: p1 1 2 r gm c p1 1 2 1.0m 20 pf 7.96 khz p2 1 2 r p2 c p2 1 2 10m 0.265 pf 60 khz z1 1 2 r z1 c p1 1 2 15.9k 20 pf 500 khz in addition, there is an external circuit pole defined by the load: p l 1 2 r l c l also, the transfer dc voltage gain of the ncp431 is: g g m r gm gor l example 1: i c =10 ma, r l = 230 ,c l = 0. define the transfer gain. the dc gain is: g g m r gm gor l ( 2.138 )( 1.0m )( 1.25 )( 230 ) 615 56 db loop gain g 8.25k 8.25k 15k 218 47 db the resulting transfer function bode plot is shown in figure 34. the asymptotic plot may be expressed as the following equation: av 615 1 jf 500 khz 1 jf 8.0 khz 1 jf 60 khz the bode plot shows a unity gain crossover frequency of approximately 600 khz. the phase margin, calculated from the equation, would be 55.9 . this model matches the open?loop bode plot of figure 15. the total loop would have a unity gain frequency of about 300 khz with a phase margin of about 44 . figure 33. simplified ncp431/ncp432 device model
ncp431a, sc431a, ncp431b, sc431b, ncp432b, sc432b series www. onsemi.com 12 ncp431/ncp432 open?loop voltage gain versus frequency figure 34. example 1 circuit open loop gain plot example 2. i c = 7.5 ma, r l = 2.2 k , c l = 0.01 f. cathode tied to reference input pin. an examination of the data sheet stability boundary curve (figure 18) shows that this value of load capacitance and cathode current is on the boundary. define the transfer gain. the dc gain is: g g m r gm gor l ( 2.138 )( 1.0m )( 1.25 )( 230 ) 6389 76 db the resulting open loop bode plot is shown in figure 35. the asymptotic plot may be expressed as the following equation: av 615 1 jf 500 khz 1 jf 8.0 khz 1 jf 60 khz 1 jf 7.2 khz note that the transfer function now has an extra pole formed by the load capacitance and load resistance. note that the crossover frequency in this case is about 250 khz, having a phase margin of about ?46 . therefore, instability of this circuit is likely. ncp431/ncp432 open?loop bode plot with load cap figure 35. example 2 circuit open loop gain plot with three poles, this system is unstable. the only hope for stabilizing this circuit is to add a zero. however, that can only be done by adding a series resistance to the output capacitance, which will reduce its effectiveness as a noise filter. therefore, practically, in reference voltage applications, the best solution appears to be to use a smaller value of capacitance in low noise applications or a very large value to provide noise filtering and a dominant pole rolloff of the system. the ncp431/ncp432 is often used as a regulator in secondary side of a switch mode power supply (smps). the benefit of this reference is high and stable gain under low bias currents. figure 36 shows dependence of the gain (dynamic impedance) on the bias current. value of minimum cathode current that is needed to assure stable gain is 80 a maximum.
ncp431a, sc431a, ncp431b, sc431b, ncp432b, sc432b series www. onsemi.com 13 figure 36. knee of reference regulator with tl431 or other references in secondary side of a smps needs bias resistor to increase cathode current to reach high and stable gain (refer to figure 37). this bias resistor does not have to be used in regulator with ncp431/ncp432 thanks to its low minimum cathode current. figure 37. smps secondary side and feedback connection on primary side the ncp431/ncp432 operates with very low leakage and reference input current. sum of these currents is lower than 100 na. regulator with the ncp431/ncp432 minimizes parasitic power consumption. the best way to achieve extremely low no?load consumption in smps applications is to use ncp431/ncp432 as regulator on the secondary side. the consumption is reduced by minimum parasitic consumption and very low bias current of ncp431/ncp432.
ncp431a, sc431a, ncp431b, sc431b, ncp432b, sc432b series www. onsemi.com 14 xx, xxx, xxx = specific device code a = assembly location l = wafer lot y = year m = date code w, ww = work week = pb?free package n431xx alyw 1 8 1 xxx m ncp43 1xxxx yww marking diagrams (note: microdot may be in either location) ordering information device marking tolerance operating temperature range package shipping ? ncp431acdr2g ac 1% 0 c to 70 c soic?8 (pb?free) 2500 / tape & reel ncp431acsnt1g vrf 1% sot?23?3 (pb?free) 3000 / tape & reel ncp431bcsnt1g vrj 0.5% sot?23?3 (pb?free) 3000 / tape & reel ncp432bcsnt1g vrm 0.5% sot?23?3 (pb?free) 3000 / tape & reel ncp431aclprag aclp 1% to?92 (to?226) (pb?free) 2000 / tape & reel ncp431aidr2g ai 1% ?40 c to 85 c soic?8 (pb?free) 2500 / tape & reel ncp431aisnt1g vrg 1% sot?23?3 (pb?free) 3000 / tape & reel ncp431bisnt1g vrk 0.5% sot?23?3 (pb?free) 3000 / tape & reel ncp432bisnt1g vrn 0.5% sot?23?3 (pb?free) 3000 / tape & reel ncp431ailprag ailp 1% to?92 (to?226) (pb?free) 2000 / tape & reel ncp431avdr2g av 1% ?40 c to 125 c soic?8 (pb?free) 2500 / tape & reel ncp431avsnt1g / sc431avsnt1g* vrh 1% sot?23?3 (pb?free) 3000 / tape & reel ncp431avlprag avlp 1% to?92 (to?226) (pb?free) 2000 / tape & reel ncp431avlpg avlp 1% to?92 (to?226) (pb?free) 2000 units / bag ncp431bvsnt1g / SC431BVSNT1G* vrl 0.5% sot?23?3 (pb?free) 3000 / tape & reel ncp432bvsnt1g / sc432bvsnt1g* vrp 0.5% sot?23?3 (pb?free) 3000 / tape & reel ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specifications brochure, brd8011/d. *sc prefix for automotive and other applications requiring unique site and control change requirements; aec?q100 qualified and ppap capable.
ncp431a, sc431a, ncp431b, sc431b, ncp432b, sc432b series www. onsemi.com 15 package dimensions to?92 (to?226) case 29?11 issue an 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 x?x 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 notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimension: millimeters. 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 b k g section x?x c v d n xx seating plane dim min max millimeters a 4.45 5.20 b 4.32 5.33 c 3.18 4.19 d 0.40 0.54 g 2.40 2.80 j 0.39 0.50 k 12.70 --- n 2.04 2.66 p 1.50 4.00 r 2.93 --- v 3.43 --- 1 t straight lead bent lead
ncp431a, sc431a, ncp431b, sc431b, ncp432b, sc432b series www. onsemi.com 16 package dimensions soic?8 nb case 751?07 issue ak 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. 6. 751?01 thru 751?06 are obsolete. new standard is 751?07. 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 1.52 0.060 7.0 0.275 0.6 0.024 1.270 0.050 4.0 0.155 mm inches scale 6:1 *for additional information on our pb?free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. soldering footprint*
ncp431a, sc431a, ncp431b, sc431b, ncp432b, sc432b series www. onsemi.com 17 package dimensions sot?23 (to?236) case 318?08 issue ap d a1 3 12 notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. maximum lead thickness includes lead finish thickness. minimum lead thickness is the minimum thickness of base material. 4. dimensions d and e do not include mold flash, protrusions, or gate burrs. mm inches scale 10:1 0.8 0.031 0.9 0.035 0.95 0.037 0.95 0.037 2.0 0.079 soldering footprint* view c l 0.25 l1 e e e b a see view c dim a min nom max min millimeters 0.89 1.00 1.11 0.035 inches a1 0.01 0.06 0.10 0.001 b 0.37 0.44 0.50 0.015 c 0.09 0.13 0.18 0.003 d 2.80 2.90 3.04 0.110 e 1.20 1.30 1.40 0.047 e 1.78 1.90 2.04 0.070 l 0.10 0.20 0.30 0.004 0.040 0.044 0.002 0.004 0.018 0.020 0.005 0.007 0.114 0.120 0.051 0.055 0.075 0.081 0.008 0.012 nom max l1 h 2.10 2.40 2.64 0.083 0.094 0.104 h e 0.35 0.54 0.69 0.014 0.021 0.029 c 0 ??? 10 0 ??? 10 *for additional information on our pb?free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. on semiconductor and are trademarks of semiconductor components industries, llc dba on semiconductor or its subsidiaries i n the united states and/or other countries. on semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property . a listing of on semiconductor?s product/patent coverage may be accessed at www.onsemi.com/site/pdf/patent?marking.pdf . on semiconductor reserves the right to make changes without further notice to any products herein. on semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does o n semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including wi thout limitation special, consequential or incidental damages. buyer is responsible for its products and applications using on semiconductor products, including compliance with all laws, reg ulations and safety requirements or standards, regardless of any support or applications information provided by on semiconductor. ?typical? parameters which may be provided in on semiconductor data sheets and/or specifications can and do vary in dif ferent applications and actual performance may vary over time. all operating parameters, including ?typic als? must be validated for each customer application by customer?s technical experts. on semiconductor does not convey any license under its patent rights nor the right s of others. on semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any fda class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. should buyer purchase or use on semicondu ctor products for any such unintended or unauthorized application, buyer shall indemnify and hold on semiconductor and its officers, employees, subsidiaries, affiliates, and distrib utors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that on semiconductor was negligent regarding the design or manufacture of the part. on semiconductor is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. p ublication ordering information n. american technical support : 800?282?9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center phone: 81?3?5817?1050 ncp431/d literature fulfillment : literature distribution center for on semiconductor 19521 e. 32nd pkwy, aurora, colorado 80011 usa phone : 303?675?2175 or 800?344?3860 toll free usa/canada fax : 303?675?2176 or 800?344?3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your loc al sales representative

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