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r3119n series 50v input voltage type voltage detector no.ea-187-090115 1 outline r3119n series are cmos process based (advantageou s for low supply current) input voltage range (50v) voltage detector with high detector threshold accuracy and ul tra-low supply current.each of those ics consists of a voltage reference unit, a comparator, resistors for detect or threshold setting, an output driver and a hysteresis circuit. there are two types: r3119nxxxa has the cd pin of external ic for setting the release-delay-time. r3119nxxxe has the sense pin of external ic. the supply current of ic is only 3.3 a. the detector threshold is possible to set range from 2.3v to 12v internally with high accuracy (1.5%). the output type is nch open drain type. since the package for these ics is small sot-23-5, hi gh density mounting of the ics on board is possible. features ? supply current typ.3.3 a ? operating voltage 1.5v~36.0v(c d pin type: r3119nxxxa) 2.1v~6.0v(sense pin type: r3119nxxxe) ? high detect vo ltage accu racy 1.5% (ta=25 c) ? detect voltage rang e stepwise setti ng with a step of 0.1v in the range of 2.3v to 12.0v is possible ? released delay time (power on reset delay time) -50~+80%( c d pin type: r3119nxxxa) ? package sot-23-5 applications ? cpu and logic circuit reset. ? battery checker. ? battery back-up circuit. ? supervising of the power supply voltage of in-vehicle equipment.
r3119x 2 block diagrams r3119nxxxa r3119nxxxe sense d out gnd v ref - + v dd c d vre f delay circuit v dd gnd + - d out selection guide the detect voltage, version, package, and the taping ty pe for the ics can be selected at the user?s request. the selection can be made with designating the part number as shown below; r3119 x xxx x - xx - x part number a b c d e code contents a designation of package type: n: sot-23-5 b setting detect voltage: stepwise setting with 0.1v in the rang e from 2.30v to 12.0v is possible c designation of active type: a: with c d pin type e: with sense pin type d designation of taping type: ex.tr (refer to taping specifications: tr type is the standard direction) e designation of composition of pin plating: -f: lead free solder plating
r3119x 3 pin configuration sot-23-5 123 4 5 (mark side) pin descriptions r3119n: sot-23-5 pin no. symbol description 1 v dd input pin 2 gnd * ground pin 3 gnd * ground pin 4 d out vd output pin c d connecting pin with external capacitor for setting delay time 5 sense voltage detector sense pin * no. 2 and no.3 pin must be wired to the gnd plan when it is mounted on board.
r3119x 4 absolute maxi mum ratings symbol item ratings unit r3119nxxxa -0.3~50.0 v dd input voltage r3119nxxxe -0.3~7.0 v d out output voltage (d out pin) -0.3~7.0 v v cd output voltage (c d pin) r3119nxxxa -0.3~7.0 v v sense input voltage (sense pin) r3119nxxxe -0.3~50.0 v i out output current (d out pin) 20 ma p d power dissipation* sot-23-5 420 mw ta ambient temperature range - 40 ~ + 105 c tstg storage temperature range - 55 ~ + 125 c * for power dissipation, please refer to package information to be described absolute maximum ratings electronic and mechanical stress momentarily exceeded abs olute maximum ratings may cause the permanent damages and may degrade the life time and safety for both device and syst em using the device in the fiel d. the functional operation at or over these absolute maximum ratings is not assured.
r3119x 5 electrical characteristics r3119nxxxa (c d pin type) value indicate -40c < = ta < = 105c is checked and guaranteed by design engineering. ta = 25 c symbol item conditions min. typ. max. unit v dd =(-v det ) ? 0.1v 3.3 5.6 i ss supply current v dd =(-v det ) + 1.0v 3.3 5.5 a ta = 2 5 c x 0.985 x 1.015 -v det detector threshold v dd pin -40 c < = ta < = 105 c x 0.970 x 1.020 v v hys detector threshold hysterisis 3.5 5 6.5 % t delay output delay time v dd =1.5v (vset)+2.0v c d =0.01 f 45 85 150 ms -v det / ta detector threshold temperature coefficient -40 c < = ta < = 105 c 100 ppm / c v ddh maximum operating voltage 36 v ta = 2 5 c 1.2 v ddl minimum operating voltage *1 -40 c < = ta < = 105 c 1.25 v v dd =1.5v,v ds =0.05v 230 a 2.3v < = (-v det )<2.6v v dd =2.2v v ds =0.5v 2.8 2.6v < = (-v det )<3.0v v dd =2.5v v ds =0.5v 3.3 i out output current 3.0v < = (-v det ) v dd =2.9v v ds =0.5v 3.5 ma the specification in is checke d and guaranteed by design engineering. all of unit are tested and specified un der load conditions such that tj ta=25 c except for detector threshold temperature coefficient item. *1) this value is the minimum input voltage when the output volt age is 0.1v or less at detecti on. (the pull-up resistance;100k ?, the pull-up voltage;5.0v) recommended operating conditions (electrical characteristics) all of electronic equipment should be designed that the mounted semiconductor devices operate within the recommended operating conditions. the semiconductor devices cannot operate normally over the recommended operating conditions, even if when they are used over such conditi ons by momentary electronic noise or surge. and the semiconductor devices may receive serious damage when they continue to operate over the recommended operating conditions.
r3119x 6 r3119nxxxe (sense pin type) value indicate -40c < = ta < = 105c is checked and guaranteed by design engineering. (ta = 25 c) symbol item conditions min. typ. max. unit v dd input voltage 2.1 6.0 v v dd =6.0v sense=(-v det ) - 1.0v 3.3 5.5 i ss supply current v dd =6.0v sense=(-v det ) + 1.0v 3.3 5.5 a ta = 2 5 c x 0.985 x 1.015 -v det detector threshold sense pin v dd =6.0v -40 c < = ta < = 105 c x 0.970 x 1.020 v v hys detector threshold hysterisis v dd =6.0v 3.5 5 6.5 % t plh output delay time v dd =6.0v sense=1.5v (vset)+2.0v 15 s -v det / ta detector threshold temperature coefficient -40 c < = ta < = 105 c 100 ppm / c v ddh maximum operating voltage 36 v ta = 2 5 c 1.2 v ddl minimum operating voltage *1 -40 c < = ta < = 105 c 1.25 v sense < (-v det ) v dd =2.1v v ds =0.05v 420 a i out output current sense < (-v det ) v dd =2.2v v ds =0.5v 2.8 m a the specification in is checke d and guaranteed by design engineering. all of unit are tested and specified un der load conditions such that tj ta=25 c except for detector threshold temperature coefficient and output delay time item. *1) this value is the minimum input voltage when the output volt age is 0.1v or less at detecti on. (the pull-up resistance;100k ? , the pull-up voltage;5.0v) recommended operating conditions (electrical characteristics) all of electronic equipment should be designed that the m ounted semiconductor devices operate within the recommended operating conditions. the semiconductor devic es cannot operate normally over the re commended operating conditions, even if when they are used over such conditions by momentary electr onic noise or surge. and the semiconductor devices may receive serious damage when they continue to operat e over the recommended operating conditions.
r3119x 7 operating diagram for operation (c d pin type: r3119nxxxa) ? due to nch open drain output, d out pin should be pulled-up to an external voltage level. vref delay circuit v dd fig.1 block diagram of external capacitor connection i x v dd fig.2 operation diagram ii x v dd explanation of operation step 1. the output voltage is equal to the pull-up voltage. step 2. at point ?a?, vref > = v dd x (r2+r3) / (r1+r2+r3) is true, as a result, the output of comparator is reversed from ?l? to ?h?, therefore the output vo ltage becomes the gnd level. the voltage level of point a means a detector threshold voltage (-v det ) step 3. when the input voltage is lower than the mini mum operating voltage, the operation of the output transistor becomes indefinite,. the output voltage is equal to the pull-up voltage. step 4. the output voltage is equal to the gnd level. step 5. at point ?b?, vref < = v dd x r2 / (r1+r2) it true, as a result, the output of comparator is reversed from ?h? to ?l?, then the output voltage is equal to the pull-up voltage. the voltage level of point b means a released voltage (+v det ) output delay time (t delay ) is calculatable by an external capacitor as the following formula. t delay [s] =8.5 x 10 6 x c d [f] step 1 2 3 4 5 comparator (-) pin input voltage i ii ii ii i comparator output l h indefinite h l hys tr. off on indefinite on off output nch tr. off on indefinite on off gnd c d - + comparator r1 r2 r3 hys tr . d out capacitor nch 45 13 2 r2 r1+r2 r2+r3 r1+r2+r3 input voltage v dd gnd detector threshold hysterisis a b released voltage + v det detector threshold - v det gnd detector delay time t reset output voltage d out output delay time t delay pull-up voltage minimum operating voltage v ddl
r3119x 8 diagram for operation (sense pin type: r3119nxxxe) ? due to nch open drain output, d out pin should be pulled-up to an external voltage level. vref v dd d out - + fig.3 block diagram i x v sense fig.4 operation diagram ii x v sense explanation of operation step 1. sense voltage is larger than detector threshold; the output voltage is equal to the pull-up voltage. step 2. at point ?a?, vref ! v sense x (r2+r3) / (r1+r2+r3) is true, as a result, the output of comparator is reversed from ?l? to ?h?, then the output voltage is equal to the pull-up voltage. the voltage level of point a means a detector threshold voltage (-v det ) step 3. at point ?b?, vref v sense x r2 / (r1+r2) is true, as a result, the output of comparator is reversed from ?h? to ?l?, then the output voltage is equal to the pull-up voltage. the voltage level of point b means a released voltage (+v det ) step 1 2 3 comparator (-) pin input voltage i ii i comparator ourput l h l hys tr. off on off output nch tr. off on off gnd comparator r1 r2 r3 hys tr. nch sense 1 2 3 sense voltage v sense detector threshold h y sterisis a b released voltage + v det detector threshold - v det gnd gnd pull-up voltage output delay time t plh r2+r3 r1+r2+r3 detector delay time reset output voltage d out t r2 r1+r2
r3119x 9 power supply injection order the r3119nxxxe series (sense pin type) supervise the voltage of the sense pin. v dd pin and sense pin can be used at the same voltage level. likewise, v dd pin and sense pin can be used at the different voltage level. if the v dd pin and sense pin are used at different voltage level, regarding the start-up sequence, force the voltage level to v dd pin prior to the sense pin. if the sense pin voltage is equal or more than the released voltage (+v det ), d out pin becomes "h"(fig.5). besides, a voltage beyond v dd pin is also acceptable to sense pin. time v dd d out sense fig.5 turn on sequence +v det
r3119x 10 test circuits r3119nxxxa (c d pin type) v dd gnd c d d out v 100k ? 5v r3119nxxxa v in v dd gnd c d d out a r3119nxxxa v in test circuit for supply current test circuit for detector threshold v dd gnd c d d out a r3119nxxxa v in v ds test circuit for nch driver output current v dd gnd c d d out v 100k ? 5v r3119nxxxa 1.5v (-v det )+2.0v 10nf test circuit for output delay time
r3119x 11 r3119nxxxe (sense pin type) v dd gnd sense d out test circuit for supply current test circuit for detector threshold test circuit for nch driver output current test circuit for output delay time a r3119nxxxe 6v v dd gnd sense d out v 100k ? r3119nxxxe 6v v dd gnd sense d out a r3119nxxxe v in v ds v dd gnd sense d out v 100k ? 5v r3119nxxxe 6v 1.5v (-v det )+2.0v 5v
r3119x 12 technical notes when r3119nxxxa/e is used in fig.a, fig.x, if the val ue of r1 is set excessively large, the dropdown voltage caused by the consumption current of ic itself, may vary the detector threshold and the release voltage. also, if the value of r1 is set excessively large, there may be delay in start-up and may cause oscillation generated by cross conduction current. when r3119nxxxa is used in fig. b, if the value of r1 is set excessively large, the dropdown voltage caused by the consumption current of ic itself, may vary the detector threshold and the released voltage. also, if the value of r1 and r2 is set excessively large, there may be delay in start-up and may cause oscillation generated by cross conduction current. when r3119nxxxa/e is used in fig.c, fig.y, if the val ue of r1 is set excessively large, the dropdown voltage caused by the consumption current of ic itself may va ry the detector threshold and the release voltage. also, if the value of r1 is set excessively large, there may be delay in start-up and may cause oscillation generated by cross conduction current. furthermore, if the value of r1 is set large and the value of r3 is set small, released voltage level may shift and the minimum operating voltage may differ. if the value of r3 is set excessively small from r1, release may not occur and may cause oscillation. r 3119nxxxa series gnd v dd d out v dd r1 r3119nxxxa series gnd v dd d out v dd r1 r2 r3119nxxxa series gnd v dd v dd r1 d out r3 fig.a fig.b fig.c fig.x fig.y r3119nxxxe series gnd v dd d out v dd r1 sense r3119nxxxe series gnd v dd d out v dd r1 r3 sense
r3119x 13 power dissipation (sot-23-5) this specification is at mounted on board. power dissipation (p d ) depends on conditions of mounting on board. this specification is based on the measurement at the condition below: (power dissipation (sot-23-5) is substitution of sot-23-6.) measurement conditions standard test land pattern environment mounting on board (wind velocity=0m/s) board material glass cloth epoxy plastic (double sided) board dimensions 40mm * 40mm * 1.6mm copper ratio top side: approx. 50%, back side: approx. 50% through-holes 0.5mm * 44pcs measurement result (ta=25 c, tjmax=125 c) standard land pattern free air power dissipation 420mw 250mw thermal resistance ja = (125-25 c)/0.42w= 263 c/w 400 c/w power dissipation p d (mw) 600 500 400 300 200 100 0 0 25 50 75 100 125 150 ambient temperature ( c) power dissipation 105 free air on board 250 420 measurement board pattern ic mount area (unit: mm) 40 40

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