? ? rev. 4 925 publication order number: ncv8501/d ? ? ? ? ? ? ? ? ? +60 v peak transient voltage ? ? 15 v reverse voltage ? short circuit ? thermal overload ? ? 8 d suffix case 751 1 8 see detailed ordering and shipping information in the package dimensions section on page 933 of this data sheet. ordering information see general marking information in the device marking section on page 934 of this data sheet. device marking information so ? 14 pd suffix case 751a 1 14 soic 16 lead wide body exposed pad pdw suffix case 751r 1 16
ncv8501 series http://onsemi.com 926 gnd nc 18 flag enable v adj mon v out v in pin connections, adjustable output so ? 8 gnd delay 18 reset enable flag mon v out v in pin connections, fixed output so ? 8 enable nc 1 16 nc v in nc nc nc nc gnd nc nc nc mon v out flag v adj sow ? 16 e pad so ? 14 flag reset v out enable nc nc gnd nc 114 nc nc v in delay mon nc enable mon 1 16 delay v in nc nc nc nc gnd nc nc nc nc v out reset flag sow ? 16 e pad v out gnd v in ncv8501 10
ncv8501 series http://onsemi.com 927 maximum ratings* rating value unit v in (dc) ? 15 to 45 v peak transient voltage (46 v load dump @ v in = 14 v) 60 v operating voltage 45 v input voltage range (reset , flag ) ? 0.3 to 10 v input voltage range (mon) ? 0.3 to 45 v input voltage range (enable) 60 v esd susceptibility (human body model) 2.0 kv junction temperature, t j ? 40 to +150 ? 55 to 150 ? 8: junction ? to ? case, r ? to ? ambient, r ? 14: junction ? to ? case, r ? to ? ambient, r ? 16 e pad: junction ? to ? case, r ? to ? ambient, r ? during the voltage range which exceeds the maximum tested voltage of v in , operation is assured, but not specified. wider limits may apply. thermal dissipation must be observed closely. electrical characteristics (i out = 1.0 ma, enable = tbd, ? 40 ? 40 ? v out ) (5.0 v, 8.0 v, 10 v options only) i out = 150 ma i out = 100 ? ? 400 100 600 150 mv mv load regulation v in = 14 v, 5.0 ma ? 5.0 30 mv line regulation [v out (typ) + 1.0] < v < 26 v, i out = 1.0 ma ? 5.0 40 mv quiescent current, (i q ) active mode i out = 100 ? ? ? 70 6.0 12 tbd 9.0 19 ? 12 25
ncv8501 series http://onsemi.com 928 electrical characteristics (continued) (i out = 1.0 ma, enable = tbd, ? 40 ? 40 ? 160 300 ? ma short circuit output current v out = 0 v 40 190 ? ma thermal shutdown (guaranteed by design) 150 180 ? ? low) ? 100 ? mv output voltage low (v rlo ) low (v r(peak) ) 1.0 v ? ? 0.1 0.6 0.4 1.0 v v delay switching threshold (v dt ) ? 1.4 1.8 2.2 v reset delay low voltage v out < reset threshold low(min) ? ? 0.1 v delay charge current delay = 1.0 v, v out > v rh 2.0 3.0 5.0 ? ? ma flag /monitor monitor threshold ? tbd 1.28 tbd v hysteresis ? 20 100 200 mv input current v mon = 2.0 v ? 1.0 0.1 1.0 ? 0.1 0.4 v voltage adjust (adjustable output only) threshold ? tbd 1.28 tbd v input current sense = 0 v ? ? 20 tbd ? tbd ? ? tbd ? v v input current enable = 14 v ? ? tbd
ncv8501 series http://onsemi.com 929 package pin description, adjustable output package pin number so ? 8 sow ? 16 e pad pin symbol function 1 7 v in input voltage. 2 15 mon monitor. input for early warning comparator. if not needed connect to v out. 3 9 enable enable control for the ic. a high powers the device up. 4 3 ? 6, 8, 10 ? 12, 14 nc no connection. 5 13 gnd ground. all gnd leads must be connected to ground . 6 16 flag open collector output from early warning comparator. 7 1 v adj voltage adjust. a resistor divider from v out to this lead sets the output voltage. 8 2 v out ? 16 e pad. package pin description, fixed output package pin number so ? 8 so ? 14 sow ? 16 e pad pin symbol function 1 13 7 v in input voltage. 2 14 8 mon monitor. input for early warning comparator. if not needed connect to v out. 3 6 9 enable enable control for the ic. a high powers the device up. 4 2 10 delay timing capacitor for reset function. 5 11 13 gnd ground. all gnd leads must be connected to ground . 6 7 16 reset active reset (accurate to v out ? 1, 3 ? 5, 10, 12 3 ? 6, 11, 12, 14, 15 nc no connection. note: tentative pinouts for so ? 14 and sow ? 16 e pad. 5.0 v option only for so ? 14.
ncv8501 series http://onsemi.com 930 v in reset v out flag delay figure 2. block diagram gnd mon current source (circuit bias) current limit sense error amplifier v bg i bias v bg v bg i bias i bias v bg i bias + ? + ? + ? + ? + bandgap reference thermal protection 2.0 v 3.0
ncv8501 series http://onsemi.com 931 enable function the part stays in a low i q sleep mode when the enable pin is held low. the part has an internal pull down if the pin is left floating. this is intended for failure modes only. an external connection (active pulldown, resistor, or switch) for normal operation is recommended. the integrity of the enable pin allows it to be tied directly to the battery line. it will withstand load dump potentials. figure 4. enable function v in v out gnd ncv8501 enable v bat delay function the reset delay circuit provides a programmable (by an external capacitor) delay on the reset output lead. the delay lead provides source current (typically 3.0 ? chip comparator is provided to perform an early warning to the microprocessor of a possible reset signal. the reset signal typically turns the microprocessor off instantaneously. this can cause unpredictable results with the microprocessor. the signal received from the flag pin will allow the microprocessor time to complete its present task before shutting down. this function is performed by a comparator referenced to the bandgap reference. the actual trip point can be programmed externally using a resistor divider to the input monitor (mon) (figure 5). figure 5. flag/monitor function v bat v in mon v out c out v cc i/o reset
ncv8501 series http://onsemi.com 932 setting the delay time the delay time is controlled by the reset delay low voltage, delay switching threshold, and the delay charge current. the delay follows the equation: t delay [ c delay (v dt reset delay low voltage) ] delay charge current example: using c delay = 33 nf. assume reset delay low voltage = 0. use the typical value for v dt = 1.8 v. use the typical value for delay charge current = 3.0 [ 33 nf(1.8 0) ] 3.0 19.8 ms stability considerations the output or compensation capacitor helps determine three main characteristics of a linear regulator: start ? up delay, load transient response and loop stability. the capacitor value and type should be based on cost, availability, size and temperature constraints. a tantalum or aluminum electrolytic capacitor is best, since a film or ceramic capacitor with almost zero esr can cause instability. the aluminum electrolytic capacitor is the least expensive solution, but, if the circuit operates at low temperatures ( ? 25 ? 40 [v in(max) v out(min) ]i out(max) (1) v in(max) i q where: v in(max) is the maximum input voltage, v out(min) is the minimum output voltage, i out(max) is the maximum output current for the application, and i q is the quiescent current the regulator consumes at i out(max) . once the value of p d(max) is known, the maximum permissible value of r 150 c t a p d (2) the value of r ? s less than the calculated value in equation 2 will keep the die temperature below 150 ? r r r ? to ? case thermal resistance, r ? to ? heatsink thermal resistance, and r ? to ? ambient thermal resistance. r
ncv8501 series http://onsemi.com 933 ordering information device output voltage package shipping ncv8501dadj so ? 8 95 units/rail ncv8501dadjr2 adjustable so ? 8 2500 tape & reel ncv8501pdwadj adjustable sow ? 16 exposed pad 46 units/rail ncv8501pdwadjr2 sow ? 16 exposed pad 1000 tape & reel ncv8501d25 so ? 8 95 units/rail ncv8501d25r2 25v so ? 8 2500 tape & reel ncv8501pdw25 2.5 v sow ? 16 exposed pad 46 units/rail ncv8501pdw25r2 sow ? 16 exposed pad 1000 tape & reel ncv8501d33 so ? 8 95 units/rail ncv8501d33r2 33v so ? 8 2500 tape & reel ncv8501pdw33 3.3 v sow ? 16 exposed pad 46 units/rail ncv8501pdw33r2 sow ? 16 exposed pad 1000 tape & reel ncv8501d50 so ? 8 95 units/rail ncv8501d50r2 so ? 8 2500 tape & reel ncv8501pdw50 50v sow ? 16 exposed pad 46 units/rail ncv8501pdw50r2 5.0 v sow ? 16 exposed pad 1000 tape & reel ncv8501pd50 so ? 14 55 units/rail NCV8501PD50R2 so ? 14 2500 tape & reel ncv8501d80 so ? 8 95 units/rail ncv8501d80r2 80v so ? 8 2500 tape & reel ncv8501pdw80 8.0 v sow ? 16 exposed pad 46 units/rail ncv8501pdw80r2 sow ? 16 exposed pad 1000 tape & reel ncv8501d100 so ? 8 95 units/rail ncv8501d100r2 10 v so ? 8 2500 tape & reel ncv8501pdw100 10 v sow ? 16 exposed pad 46 units/rail ncv8501pdw100r2 sow ? 16 exposed pad 1000 tape & reel
ncv8501 series http://onsemi.com 934 marking diagrams 1 8501x alyw 8 so ? 8 x = voltage ratings as indicated below: a = adjustable 2 = 2.5 v 3 = 3.3 v 5 = 5.0 v 8 = 8.0 v 0 = 10 v a = assembly location wl, l = wafer lot yy, y = year ww, w = work week sow ? 16 e pad so ? 14 1 ncv8501x awlyww 14 ncv8501x awlyyww 1 16
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