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r3117xxx3/4 series low voltage detector with sense pin no.ea-261-110107 1 notice r3117xxx3a/c and r3117qxx4a/c series may cause the ma lfunction (miss detection), in the case of its v dd pin voltage changes very rapidly.please check the details in the page 11. outline the r3117x series are cmos-based voltage detector ic s with high detector threshold accuracy and ultra-low supply current, which can be operated at an extremely lo w voltage and is used for system reset as an example. each of these ics consists of a voltage reference unit, a comparator, resistors for detector threshold setting, an output driver and a hysteresis circuit. the detector thre shold is fixed with high accuracy internally and does not require any adjustment. the tolerance of the detector threshold is 15mv (-v det < = features ? ? supply current ......................................................................typ. 0.29 a (v dd = 6.0v) consumption current through sense pin is not included. ? operating voltage range ......................................................1.0v to 6.0v (-40 c < = t opt < = 105 c) ? detector threshol d range.................................................... 0.7v to 5.0v (0.1v steps) ( for other voltages, please refer to mark informations.) ? accuracy detector threshold................................................ 1.0% (-v det > = 1.6v), 15mv (-v det < 1.6v) ? temperature-drift coefficient of detector threshold ............typ. 30ppm/ c ? output type s.........................................................................nch open drain and cmos ? packages ..............................................................................dfn( plp)1010-4, sc-88a, sot-23-5 ? topt=25 c, unless otherwise noted. applications ? cpu and logic circuit reset ? battery checker ? window comparator ? wave shaping circuit ? battery back-up circuit ? power failure detector
r3117xxx3/4 2 block diagrams nch open drain output (r3117xxxxa) cmos output (r3117xxxxc) d out v dd vref gnd sense d out v dd vref gnd sense selection guide the package type, the detector thre shold, the output type and the taping type for the ics can be selected at the users? request. product name package quantity per reel pb free halogen free r3117kxx3 ? -tr dfn(plp)1010-4 10,000 pcs yes yes r3117qxx4 ? -tr-fe sc-88a 3,000 pcs yes yes r3117nxx3 ? -tr-fe sot-23-5 3,000 pcs yes yes xx : the detector threshold can be designated in the range from 0.7v(07) to 5.0v(50) in 0.1v steps. (for other voltages, please refer to mark informations.) ? : designation of output type (a) nch open drain (c) cmos
r3117xxx3/4 3 pin configurations ? dfn plp 1010-4* 1 ? sc-88a ? sot-23-5 top view 2 1 3 4 bottom view 1 2 4 3 54 1 3 2 (mark side) 1 4 5 2 3 (mark side) pin descriptions ? dfn(plp)1010-4* 1 pin no. symbol description 1 d out output pin ("l" at detection) 2 sense voltage detector voltage sense pin 3 gnd ground pin 4 v dd input pin ? 1) tab is gnd level. (they are connected to the reverse side of this ic.) the tab is better to be connected to the gn d, but leaving it open is also acceptable. ? sc-88a pin no. symbol description 1 v dd input pin 2 nc no connection* 2 3 gnd ground pin 4 sense voltage detector voltage sense pin 5 d out output pin ("l" at detection) ? 2) in terms of nc pin of sc-88a, connect it to the gnd or use it as open. ? sot-23-5 pin no. symbol description 1 d out output pin ("l" at detection) 2 v dd input pin 3 gnd ground pin 4 nc no connection 5 sense voltage detector voltage sense pin
r3117xxx3/4 4 absolute maximum ratings symbol item rating unit v dd supply voltage 7.0 v v sense sense pin voltage 7.0 v output voltage (nch open drain output) v ss ? 0.3 to 7.0 v out output voltage (cmos output) v ss ? 0.3 to v dd + 0.3 v i out output current 20 ma power dissipation (dfn(plp)1010-4)* 400 power dissipation (sc-88a)* 380 p d power dissipation (sot-23-5)* 420 mw topt operating temperature range ? 40 to 105 c tstg storage temperature range ? 55 to 125 c * ) for power dissipation, please refer to package information. absolute maximum ratings electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the permanent damages and may degrade the life time and safe ty for both device and sy stem using the device in the field. the functional operation at or over these absolute maximum ratings is not assured. electrical characteristics ? r3117xxxxa/c values indicate ? 40c < = < = topt = 25 c symbol item conditions min. typ. max. unit 1.0v < = < = < = -v det <1.6v 5.25v < v dd < = < = < = 0.99 -v det 1.01 -v det detector threshold (t opt =25 c) 1.6v < = -v det < = < = 0.9925 -v det 1.016 v 1.0v < = < = < = -v det <1.6v 5.25v < v dd < = < = < = 0.98 -v det 1.02 -v det detector threshold (-40 c < = t opt < = 105 c) 1.6v < = -v det < = < = 0.9825 -v det 1.026 v v hys detector threshold hysteresis v dd =1.0v to 6.0v -v det 0.04 -v det 0.07 v v sense =-v det -0.1v 0.31 1.47 i ss supply current* 1 v sense =-v det 1.1 0.29 1.25 a
r3117xxx3/4 5 symbol item conditions min. typ. max. unit -v det < 1.5v 6 25 1.5v < = -v det < 4.7v 5 40 r sense sense resistor 4.7v < = -v det 10 40 m t opt =25 c 1.0 6.0 v dd operating voltage -40 c < = < = c 1.0 6.0 v t opt =25 c 0.50 v ddl minimum operating voltage* 2 -40 c < = < = c 0.55 v v dd =0.6v, v ds =0.05v 7 a -v det < 1.1v v dd =0.6v v ds =0.5v 0.020 1.1v < = < = < = < = -v det / t opt detector threshold temperature coefficient -40 c < = < = c 30 ppm / c -v det < 1.5v 80 t phl detector output delay time* 5 v dd =5v 1.5v < = s < = s all of unit are tested and specified under load conditions such that t opt =25c except for detector threshold temperature coefficient, detector output delay time and release output delay time. *1: consumption current through sense pin is not included. *2: in case that the v dd pin and sense pin are connected and the value shows the minimum supply voltage (v dd ) when the output voltage at detector thres hold can be maintained as 0.1v or less. (in case of nch open drain type, pull-up resistor is 470k and pull-up voltage is set at 5v for testing.) if v dd is high enough, down to 0v is acceptable for sense pin. *3: in case of cmos type *4: in case of nch open drain type *5: in the case of cmos output type: time interval from forcing pulsive 6.0v to -v det -2.0v or 0v, or from forcing 0v to -v det +2.0v or 6.0v to sense pin, to when the output voltage will reach v dd /2. in the case of nch open drain output type: output pin is pulled up to 5v with 470k and time interval from forcing 6.0v to -v det -2.0v or 0v, or forc ing pulsive 0v to -v det +2.0v or 6.0v to when the output voltage reaches up to 2.5v. 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 conditions by momentary electronic noise or surge. and the semiconductor de vices may receive serious damage when they continue to operate over the recommended operating conditions.
r3117xxx3/4 6 electrical characteristics by detector threshold ? r3117x07xa/c to r3117x50xa/c bold values are checked and guaranteed by design engineering at ? 40 c < = < = c, unless otherwise noted. topt=25 c detector threshold 1.0v < = v dd < = 5.25v detector threshold 1.0v < = v dd < = detector threshold 5.25v < v dd < = detector threshold 5.25v < v dd < = 6.0v detector threshold hysteresis -v det [v] -v det [v] -v det [v] -v det [v] v hys [v] part number min. max. min. max. min. max. min. max. min. max. r3117x07xa/c 0.6850 0.7150 0.6700 0.7300 0.6890 0.7240 0.6740 0.7390 0.028 0.049 r3117x08xa/c 0.7850 0.8150 0.7700 0.8300 0.7890 0.8240 0.7740 0.8390 0.032 0.056 r3117x09xa/c 0.8850 0.9150 0.8700 0.9300 0.8890 0.9240 0.8740 0.9390 0.036 0.063 r3117x10xa/c 0.9850 1.0150 0.9700 1.0300 0.9890 1.0240 0.9740 1.0390 0.040 0.070 r3117x11xa/c 1.0850 1.1150 1.0700 1.1300 1.0890 1.1240 1.0740 1.1390 0.044 0.077 r3117x12xa/c 1.1850 1.2150 1.1700 1.2300 1.1890 1.2240 1.1740 1.2390 0.048 0.084 r3117x13xa/c 1.2850 1.3150 1.2700 1.3300 1.2890 1.3240 1.2740 1.3390 0.052 0.091 r3117x14xa/c 1.3850 1.4150 1.3700 1.4300 1.3890 1.4240 1.3740 1.4390 0.056 0.098 r3117x15xa/c 1.4850 1.5150 1.4700 1.5300 1.4890 1.5240 1.4740 1.5390 0.060 0.105 r3117x16xa/c 1.5840 1.6160 1.5680 1.6320 1.5880 1.6256 1.5720 1.6416 0.064 0.112 r3117x17xa/c 1.6830 1.7170 1.6660 1.7340 1.6872 1.7272 1.6702 1.7442 0.068 0.119 r3117x18xa/c 1.7820 1.8180 1.7640 1.8360 1.7865 1.8288 1.7685 1.8468 0.072 0.126 r3117x19xa/c 1.8810 1.9190 1.8620 1.9380 1.8857 1.9304 1.8667 1.9494 0.076 0.133 r3117x20xa/c 1.9800 2.0200 1.9600 2.0400 1.9850 2.0320 1.9650 2.0520 0.080 0.140 r3117x21xa/c 2.0790 2.1210 2.0580 2.1420 2.0842 2.1336 2.0632 2.1546 0.084 0.147 r3117x22xa/c 2.1780 2.2220 2.1560 2.2440 2.1835 2.2352 2.1615 2.2572 0.088 0.154 r3117x23xa/c 2.2770 2.3230 2.2540 2.3460 2.2827 2.3368 2.2597 2.3598 0.092 0.161 r3117x24xa/c 2.3760 2.4240 2.3520 2.4480 2.3820 2.4384 2.3580 2.4624 0.096 0.168 r3117x25xa/c 2.4750 2.5250 2.4500 2.5500 2.4812 2.5400 2.4562 2.5650 0.100 0.175 r3117x26xa/c 2.5740 2.6260 2.5480 2.6520 2.5805 2.6416 2.5545 2.6676 0.104 0.182 r3117x27xa/c 2.6730 2.7270 2.6460 2.7540 2.6797 2.7432 2.6527 2.7702 0.108 0.189 r3117x28xa/c 2.7720 2.8280 2.7440 2.8560 2.7790 2.8448 2.7510 2.8728 0.112 0.196 r3117x29xa/c 2.8710 2.9290 2.8420 2.9580 2.8782 2.9464 2.8492 2.9754 0.116 0.203 r3117x30xa/c 2.9700 3.0300 2.9400 3.0600 2.9775 3.0480 2.9475 3.0780 0.120 0.210 r3117x31xa/c 3.0690 3.1310 3.0380 3.1620 3.0767 3.1496 3.0457 3.1806 0.124 0.217 r3117x32xa/c 3.1680 3.2320 3.1360 3.2640 3.1760 3.2512 3.1440 3.2832 0.128 0.224 r3117x33xa/c 3.2670 3.3330 3.2340 3.3660 3.2752 3.3528 3.2422 3.3858 0.132 0.231 r3117x34xa/c 3.3660 3.4340 3.3320 3.4680 3.3745 3.4544 3.3405 3.4884 0.136 0.238 r3117x35xa/c 3.4650 3.5350 3.4300 3.5700 3.4737 3.5560 3.4387 3.5910 0.140 0.245 r3117x36xa/c 3.5640 3.6360 3.5280 3.6720 3.5730 3.6576 3.5370 3.6936 0.144 0.252 r3117x37xa/c 3.6630 3.7370 3.6260 3.7740 3.6722 3.7592 3.6352 3.7962 0.148 0.259 r3117x38xa/c 3.7620 3.8380 3.7240 3.8760 3.7715 3.8608 3.7335 3.8988 0.152 0.266 r3117x39xa/c 3.8610 3.9390 3.8220 3.9780 3.8707 3.9624 3.8317 4.0014 0.156 0.273 r3117x40xa/c 3.9600 4.0400 3.9200 4.0800 3.9700 4.0640 3.9300 4.1040 0.160 0.280 r3117x41xa/c 4.0590 4.1410 4.0180 4.1820 4.0692 4.1656 4.0282 4.2066 0.164 0.287 r3117x42xa/c 4.1580 4.2420 4.1160 4.2840 4.1685 4.2672 4.1265 4.3092 0.168 0.294 r3117x43xa/c 4.2570 4.3430 4.2140 4.3860 4.2677 4.3688 4.2247 4.4118 0.172 0.301 r3117x44xa/c 4.3560 4.4440 4.3120 4.4880 4.3670 4.4704 4.3230 4.5144 0.176 0.308 r3117x45xa/c 4.4550 4.5450 4.4100 4.5900 4.4662 4.5720 4.4212 4.6170 0.180 0.315 r3117x46xa/c 4.5540 4.6460 4.5080 4.6920 4.5655 4.6736 4.5195 4.7196 0.184 0.322 r3117x47xa/c 4.6530 4.7470 4.6060 4.7940 4.6647 4.7752 4.6177 4.8222 0.188 0.329 r3117x48xa/c 4.7520 4.8480 4.7040 4.8960 4.7640 4.8768 4.7160 4.9248 0.192 0.336 r3117x49xa/c 4.8510 4.9490 4.8020 4.9980 4.8632 4.9784 4.8142 5.0274 0.196 0.343 r3117x50xa/c 4.9500 5.0500 4.9000 5.1000 4.9625 5.0800 4.9125 5.1300 0.200 0.350
r3117xxx3/4 7 electrical characteristics by detector threshold ? r3117x07xa/c to r3117x50xa/c are checked and guaranteed by design engineering at ? 40 ct opt 105 c, unless otherwise noted. topt=25 c sense resistor nch driver output current 1 nch driver output current2 pch driver output current detector output delay time release output delay time r sense [m ] i out1 [ a] i out2 [ma] i out3 [ma] t phl [s] t plh [s] min. typ. cond. min. cond. min. cond. min. cond. typ. cond. typ. v dd = 0.6v v ds = 0.5v 0.020 6 25 80 v dd = 1.0v v ds = 0.5v 0.400 v dd = 5.0v v sense = 6.0v 0v ? note) v dd = 1.5v v ds = 0.5v 1.000 v dd = 4.5v v ds = 2.1v 0.650 v dd = 5.0v v sense = 0v -v det +2.0v ? note) 50 5 10 40 v dd = 0.6v v ds = 0.05v 7 v dd = 3.0v v ds = 0.5v 2.400 v dd = 6.0v v ds = 2.1v 0.900 v dd = 5.0v v sense = 6.0v -v det -2.0v ? note) 40 v dd = 5.0v v sense = 0v 6.0v ? note) 100 note) 1. in the case of cmos output type: time interval from forcing pulsive 6.0v to -v det -2.0v or 0v, or from forcing 0v to -v det +2.0v or 6.0v to sense pin, to when the output voltage will reach v dd /2. 2. in the case of nch open drain output type: output pin is pulled up to 5v with 470k and time interval from forcing 6.0v to -v det -2.0v or 0v, or forcing pulsive 0v to -v det +2.0v or 6.0v to when the output voltage reaches up to 2.5v.
r3117xxx3/4 8 timing chart detector threshold h y steresis t plh gnd gnd v ddl - v det +v det detector threshold released voltage minimum operating voltage pull-up voltage sense pin voltage (v sense ) output voltage (v out ) r3117xxxxa t plh r3117xxxxc t phl t phl supply voltage (v dd ) detector threshold hysteresis supply voltage (v dd ) definition of output delay time output delay time (t plh ) is defined as follows: 1. in the case of nch open drain output: under the condition of the output pin (d out ) is pulled up through a resistor of 470k to 5v, the time interval between the rising edge of sense pin pulse from 0v to (-v det ) + 2.0v or the time interval of 6.0v pulse voltage is supplied, the becoming of the output voltage to 2.5v. 2. in the case of cmos output: the time interval between the rising edge of sense pin pulse from 0v to (-v det ) + 2.0v or the time interval of 6.0v pulse voltage is supplied, the becoming of the output voltage to v dd /2. -v det + 2.0v or 6.0v gnd 5.0v 2.5v gnd t plh t phl v ddl minimum operating voltage supply voltage (v dd ) output voltage (v out ) sense pin voltage (v sense ) gnd gnd t plh t phl -v det +2.0v or 6.0v 5.0v v dd /2 v ddl minimum operating voltage supply voltage (v dd ) output voltage (v out ) sense pin voltage (v sense ) nch open drain output cmos output (r3117xxxxa) (r3117xxxxc)
r3117xxx3/4 9 operation ? operation of r3117xxxxa vref ra rb rc v dd d out gnd tr.1 nch com p arato r sense d out pin should be pulled-up to v dd or an external voltage level. block diagram (r3117xxxxa) + v det ? v det 1 2 3 v ddl gnd gnd a b t plh t phl supply voltage (v dd ) output voltage (v out ) sense pin voltage (v sense ) detector threshold hysteresis detector threshold released voltage pull-up voltage detect delay time output delay time minimum operating voltage step 1 2 3 comparator ( ? ) pin input voltage i ii i comparator output l h l tr.1 off on off output tr. nch off on off i v sense rb + rc ra + rb + rc ii v sense rb ra + rb operation diagram ? explanation of operation step 1. the output voltage is equal to the pull-up voltage. step 2. at point "a", vref > = v sense (rb + rc)/(ra + rb + rc) is true, as a result, the output of comparator is reversed from "l" to "h", theref ore the output voltage becomes the gnd level. the voltage level of point a means a detector threshold voltage (-v det ). (when the supply voltage is lower than the minimum operating voltage, the operation of the output transistor becomes indefin ite. the output voltage is equal to the gnd level.) step 3. at point "b", vref < = v sense rb/(ra + rb) 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 ). ? ) the difference between a released voltage and a detector threshold voltage is a detector threshold hysteresis.
r3117xxx3/4 10 ? operation of r3117xxxxc vref ra rb rc v dd d out gnd tr.1 nch com p arato r pch sense block diagram (r3117xxxxc) 12 3 gnd gnd a b t plh t phl + v det ? v det v ddl supply voltage (v dd ) output voltage (v out ) sense pin voltage (v sense ) detector threshold hysteresis detector threshold released voltage detect delay time output delay time minimum operating voltage supply voltage (v dd ) step 1 2 3 comparator ( ? ) pin input voltage i ii i comparator output l h l tr.1 off on off pch on off on output tr. nch off on off i v sense rb + rc ra + rb + rc ii v sense rb ra + rb operation diagram ? explanation of operation step 1. the output voltage is equal to the supply voltage (v dd ). step 2. at point "a", vref > = v sense (rb + rc)/(ra + rb + rc) is true, as a result, the output of comparator is reversed from "l" to "h", theref ore the output voltage becomes the gnd level. the voltage level of point a means a detector threshold voltage (-v det ). (when the supply voltage is lower than the minimum operating voltage, the operation of the output transistor becomes indefin ite. the output voltage is equal to the gnd level. step 3. at point "b", vref < = v sense rb/(ra + rb) is true, as a result, the output of comparator is reversed from "h" to "l", then the output voltage is equal to the supply voltage (v dd ). the voltage level of point b means a released voltage ( + v det ). ? ) the difference between a released voltage and a detector threshold voltage is a detector threshold hysteresis.
r3117xxx3/4 11 power supply injection order the r3117xxxxa/c series 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. please note that if the v dd voltage enters the shaded area in the fig.2 after the power activation, it may cause the malfunction. the vertical axis in the fig.2 show s the fluctuating magnification of v dd . for example, when v dd is 1.5v with the released state and if v dd increase to 5.25v (3.5 times) within 100ns, it may cause the malfunction. if the sense pin voltage is equal or more than the released voltage (+v det ), d out pin becomes "h". besides, a voltage beyond v dd pin is also acceptable to sense pin. conc erning the r3117xxxxa series (nch open drain output type), d out pin must be pulled-up with an external resister. t v dd v out v sense +v det 1.0 2.0 3.0 4.0 5.0 6.0 0.01 0.1 1 10 100 1000 input voltage rising time tr ( s) input voltage changing ratio v in high / v in lo tr v in lo v in high operations in this area may cause malfunction. v dd fig.1 turn on sequence fig.2
r3117xxx3/4 12 outside setting of the detection voltage to monitor the voltage more than 5.0v or if the different detector threshold with using lower threshold device, divider resistors can be applied to the sense pin. in this usage, some error range will be generated to the detector threshold voltage caused by the internal resistor r sense (fig.3) of the ic. supposed that the detector threshold voltage is described as vs, the next equation will be true. v s = -v det (ra + rb)/rb. however, actually an error includes by sense resistance (r sense ) of the ic inside. (figure 4) ia = ib + i sense ...................................... (1) ib = -v det / rb ...................................... (2) thus, ia = -v det / rb + i sense ...................................... (3) therefore, v s = -v det + ia ra ...................................... (4) put equation (3) into equation (4), then v s = -v det (ra + rb) / rb + ra i sense ra i sense is an error in v s. ra i sense = ra (-v det ) / r sense = -v det ra / r sense the error range is -v det ra/r sense (fig.3) and to make it small, choosing the low detector threshold voltage type and set the resistance values ra, rb as r sense >>ra. refer to the electrical characteristics table to see the r sense value. v dd sense gnd r3117x series d out -v det ra rb vs v dd r sense sense gnd r3117x series -v det ra rb vs i sense ia ib fig.3 fig.4
r3117xxx3/4 13 accuracy detector threshold if the v dd bias voltage is lager than 5.25v, and to keep the detec tor threshold accuracy level, or if the maximum operating voltage line must be used as the v dd bias voltage, the input voltage must be set low by using the divider resistors which are shown in fig.5. v dd gnd r3117x series d out sense -v det ra rb vs r2 r1 v b fig.5
r3117xxx3/4 14 detector operation vs. glitch input voltage to the sense pin when the r3117x is at released, if the pulse voltage which the detector threshold or lower voltage, the graph below means that the relation between pulse width and t he amplitude of the swing to keep the released state for the r3117x. 1 100 1000 10 over drive voltage (mv) pulse width ( s) 40 20 0 140 80 60 100 120 r3117x07xa/c r3117x50xa/c detector threshold (-v det ) over drive pulse width sense voltage (v sense ) v sense input waveform this graph shows the maximum pulse conditions to keep the released voltage. if the pulse with larger amplitude or wider width than the graph above, is in put to sense pin, the reset signal may be output.
r3117xxx3/4 15 test circuits i ss v in v dd sense gnd r3117x series 470k supply current test circuit detector threshold test circuit (pull-up circuit is not necessary for cmos output type.) v ds i out v in v dd sense gnd r3117x series d out v dd ? v ds i out v in v dd sense gnd r3117x series d out v ds nch driver output current test circuit pch driver output current test circuit ? apply to cmos output type only
r3117xxx3/4 16 typical characteristics 1) supply current vs. supply voltage r3117xxxxa/c (at released) r3117xxxxa/c (at detect) 04 256 3 1 supply voltage v dd (v) supply current i ss ( a) 0 1.0 0.6 0.4 0.2 0.8 topt=105 c topt=25 c topt=- 40 c 04 256 3 1 supply voltage v dd (v) supply current i ss ( a) 0 1.0 0.6 0.4 0.2 0.8 topt=105 c topt=25 c topt=- 40 c 2) detector threshold vs. temperature r3117x07xa/c r3117x30xa/c temperature topt ( c) detector threshold v det (v) 0.69 0.75 0.74 0.73 0.72 0.71 0.70 -40 75 50 025 -25 100 105 v dd =5.0v -v det +v det temperature topt ( c) detector threshold v det (v) 2.95 3.20 3.15 3.10 3.05 3.00 -40 75 50 025 -25 100 105 v dd =5.0v -v det +v det r3117x50xa/c temperature topt ( c) detector threshold v det (v) 4.95 5.35 5.25 5.30 5.20 5.15 5.10 5.05 5.00 -40 75 50 025 -25 100 105 v dd =5.0v -v det +v det
r3117xxx3/4 17 3) detector threshold vs. supply voltage r3117x07xa/c r3117x30xa/c 15 34 26 supply voltage v dd (v) detector threshold v det (v) 0.692 0.708 0.702 0.700 0.696 0.698 0.694 0.704 0.706 topt=- 40 c topt=25 c topt=105 c 15 34 26 supply voltage v dd (v) detector threshold v det (v) 2.97 3.03 3.00 2.99 2.98 3.01 3.02 topt=- 40 c topt=25 c topt=105 c r3117x50xa/c 15 34 26 supply voltage v dd (v) detector threshold v det (v) 4.95 5.05 5.00 4.99 4.97 4.98 4.96 5.02 5.04 5.01 5.03 topt=- 40 c topt=25 c topt=105 c 4) hysteresis vs. supply voltage r3117x07xa/c r3117x30xa/c 145 3 26 supply voltage v dd (v) detector threshold hysteresis v hys (v) 0.028 0.049 0.042 0.035 topt=- 40 c topt=25 c topt=105 c 145 3 26 supply voltage v dd (v) detector threshold hysteresis v hys (v) 0.12 0.21 0.18 0.15 topt=- 40 c topt=25 c topt=105 c
r3117xxx3/4 18 r3117x50xa/c 145 3 26 supply voltage v dd (v) detector threshold hysteresis v hys (v) 0.20 0.35 0.30 0.25 topt=- 40 c topt=25 c topt=105 c 5) output voltage vs. sense pin input voltage (nch open drain output type is pulled up to v dd .) r3117x07xa/c r3117x30xa/c 0 1.5 0.5 1.0 2.0 sense voltage v sense (v) output voltage v out (v) 0 6 4 2 3 1 5 topt=25 c v dd =5.0v v dd =3.0v v dd =1.0v 034 12 5 sense voltage v sense (v) output voltage v out (v) 0 6 4 2 3 1 5 topt=25 c v dd =5.0v v dd =3.0v v dd =1.0v r3117x50xa/c 034 12 56 sense voltage v sense (v) output voltage v out (v) 0 6 4 2 3 1 5 topt=25 c v dd =5.0v v dd =3.0v v dd =1.0v
r3117xxx3/4 19 6) nch driver output current vs. supply voltage 7) nch driver output current vs. v ds r3117xxxxa/c r3117xxxxa/c 04 25 3 16 supply voltage v dd (v) nch driver output current i out (ma) 0 10 6 8 4 2 topt=- 40 c topt=25 c topt=105 c v ds =0.5v 0 1.5 1.0 0.5 2.0 v ds (v) nch driver output current i out (ma) 0 30 10 20 v dd =5.0v v dd =4.0v v dd =6.0v v dd =3.0v v dd =2.0v v dd =1.0v topt=25 c 8) pch driver output current vs. supply voltage 9) pch driver output current vs. v ds r3117xxxxc r3117xxxxc 045 23 16 supply voltage v dd (v) pch driver output current i out (ma) 0 2.0 1.5 1.0 0.5 topt=- 40 c topt=25 c topt=105 c v ds =2.1v 04 25 3 16 v ds (v) pch driver output current i out (ma) 0 2.5 1.0 0.5 1.5 2.0 v dd =5.0v v dd =4.0v v dd =6.0v v dd =3.0v v dd =2.0v v dd =1.0v topt=25 c
r3117xxx3/4 20 typical application ? r3117xxxxa cpu reset circuit (nch open drain output) (1) input voltage to r3117xxxxa is equal to input voltage to cpu r v dd reset cpu gnd v dd 470k (2) input voltage to r3117xxxxa is unequal to input voltage to cpu v dd1 r v dd reset cpu gnd v dd2 470k ? r3117xxxxc cpu reset circuit (cmos output) v dd reset cpu gnd v dd vs v dd sense gnd r3117xxxxc series d out
r3117xxx3/4 21 technical notes when r3117xxxxa/c is used in the circuit as sense pin and v dd pin are connected each other such as in figure a, 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 is set excessively large, there may cause oscillation generated by cr oss conduction current with released operation. when r3117xxxxa/c is used in the circuit as sense pin and v dd pin are connected each other such as in figure b, if the value of r1 is set excessively large, the dropdown voltage caused by the consumption current of ic itself, may vary the detecor threshold and the released voltage. also, if the value of r1 is set excessively large, there may be delay in star t-up and may cause oscillation generated by cross conduction current. fu rthermore, if the value of r1 is set large and the value of r2 is set small, released voltage level may shift and the minimum operating voltage may differ. if the value of r2 is set excessively small from r1, release may not occur and may cause oscillation. r2 r1 r3117x series gnd v dd r1 v dd v dd r3117x series gnd v dd d out d out sense sense figure a figure b
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