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| rev.1.0 _02 super-small package 2-circuit high ripple-rejection low dropout cmos voltage regulator s-1711 series seiko instruments inc. 1 the s-1711 series is a 2-channel positive voltage regulator with a low dropout voltage, high output voltage accuracy, and low current c onsumption (150 ma output current) developed based on cmos technology. a 1.0 f small ceramic capacitor can be used, and a 2- circuit voltage regulator with 1.0% high-accuracy output voltage is incorporated in an sot-23-6 or super-small snt-6a package. the a/ b/ e/ f types are provided with a discharge shunt function allowing high-speed output response when the on/off pin is used. compared with the conventi onal 150 ma output current 2- channel cmos voltage regulat ors, high-density mounting is realized by using the super-small snt-6a package and a small ceramic capacitor. also, the low current consumption makes the s-1711 series ideal for mobile devices. ? features ? output voltage: 1.5 v to 5.5 v, selectable in 0.1 v steps. ? low esr capacitor can be used: a ceramic capacitor of 1.0 f or more can be used fo r the output capacitor. ? wide input voltage range: 2.0 v to 6.5 v ? high-accuracy output voltage: 1.0% ? low dropout voltage: 200 mv typ. (3.0 v output product, i out = 150 ma) ? low current consumpti on: during operation: 70 a typ., 90 a max. (per circuit) during shutdown: 0.1 a typ., 1.0 a max. ? output current: 150 ma output is possible (at v in v out(s) + 1.0 v) *1 (per circuit) ? high ripple rejection: 70 db typ. (at 1.0 khz) ? built-in overcurrent protector: overcurr ent of output transisto r can be restricted. ? built-in on/off circuit: en sures long battery life. ? discharge shunt circuit can be selected. ? pull-down or pull-down resistor can be selected. ? small package: snt-6a, sot-23-6 *1. attention should be paid to the power dissipation of the package when the out put current is large. ? applications ? power supply for cellular phones ? power supply for battery-powered devices ? power supply for home electric/electronic appliances ? package drawing code package name package tape reel snt-6a pg006-a pg006-a pg006-a sot-23-6 mp006-a mp006-a mp006-a
super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator s-1711 series rev.1.0 _02 2 seiko instruments inc. ? block diagram 1. s-1711 series a type function status on/off logic ?h? active discharge shunt function available pull-up resistance none pull-down resistance available *1. parasitic diode on/off1 overcurrent protector on/off circuit reference voltage circuit 4 3 2 5 6 1 + ? + ? vin on/off2 vout1 vss vout2 overcurrent protector on/off circuit reference voltage circuit *1 * 1 *1 * 1 figure 1 2. s-1711 series b type function status on/off logic ?h? active discharge shunt function available pull-up resistance none pull-down resistance none *1. parasitic diode on/off1 overcurrent protector on/off circuit reference voltage circuit 4 3 2 5 6 1 + ? + ? vin on/off2 vout1 vss vout2 overcurrent protector on/off circuit reference voltage circuit *1 * 1 *1 * 1 figure 2 super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator rev.1.0 _02 s-1711 series seiko instruments inc. 3 3. s-1711 series c type function status on/off logic ?h? active discharge shunt function none pull-up resistance none pull-down resistance available *1. parasitic diode on/off1 overcurrent protector on/off circuit reference voltage circuit 4 3 2 5 6 1 + ? + ? vin on/off2 vout1 vss vout2 overcurrent protector on/off circuit reference voltage circuit *1 * 1 figure 3 4. s-1711 series d type function status on/off logic ?h? active discharge shunt function none pull-up resistance none pull-down resistance none *1. parasitic diode on/off1 overcurrent protector on/off circuit reference voltage circuit 4 3 2 5 6 1 + ? + ? vin on/off2 vout1 vss vout2 overcurrent protector on/off circuit reference voltage circuit *1 * 1 figure 4 super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator s-1711 series rev.1.0 _02 4 seiko instruments inc. 5. s-1711 series e type function status on/off logic ?l? active discharge shunt function available pull-up resistance available pull-down resistance none *1. parasitic diode on/off1 overcurrent protector on/off circuit reference voltage circuit 4 3 2 5 6 1 + ? + ? vin on/off2 vout1 vss vout2 overcurrent protector on/off circuit reference voltage circuit *1 * 1 *1 * 1 figure 5 6. s-1711 series f type function status on/off logic ?l? active discharge shunt function available pull-up resistance none pull-down resistance none *1. parasitic diode on/off1 overcurrent protector on/off circuit reference voltage circuit 4 3 2 5 6 1 + ? + ? vin on/off2 vout1 vss vout2 overcurrent protector on/off circuit reference voltage circuit *1 * 1 *1 * 1 figure 6 super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator rev.1.0 _02 s-1711 series seiko instruments inc. 5 7. s-1711 series g type function status on/off logic ?l? active discharge shunt function none pull-up resistance available pull-down resistance none *1. parasitic diode on/off1 overcurrent protector on/off circuit reference voltage circuit 4 3 2 5 6 1 + ? + ? vin on/off2 vout1 vss vout2 overcurrent protector on/off circuit reference voltage circuit *1 * 1 figure 7 8. s-1711 series h type function status on/off logic ?l? active discharge shunt function none pull-up resistance none pull-down resistance none *1. parasitic diode on/off1 overcurrent protector on/off circuit reference voltage circuit 4 3 2 5 6 1 + ? + ? vin on/off2 vout1 vss vout2 overcurrent protector on/off circuit reference voltage circuit *1 * 1 figure 8 super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator s-1711 series rev.1.0 _02 6 seiko instruments inc. ? product name structure ? the product types, output voltage, and package types for t he s-1711 series can be select ed at the user?s request. refer to the ? 1. product name ? for the meanings of the char acters in the product name, ? 2. function list according to product type ? for product types. 1. product name 1. 1 package snt-6a s-1711 x xx xx ? i6t1 g fixed package abbreviation and ic packing specifications *1 i6t1: snt-6a, tape product output voltage of voltage regulator 2 15 to 55 (e.g., when the output vo ltage is 1.5 v, it is expressed as 15.) output voltage of voltage regulator 1 15 to 55 (e.g., when the output vo ltage is 1.5 v, it is expressed as 15.) product type *2 a to h *1. refer to the taping specificat ions at the end of this book. *2. refer to the ? 2. function list according to product type ?. 1. 2 package sot-23-6 s-1711 x xx xx ? m6t1 package abbreviation and ic packing specifications *1 m6t1: sot-23-6, tape product output voltage of voltage regulator 2 15 to 55 (e.g., when the output vo ltage is 1.5 v, it is expressed as 15.) output voltage of voltage regulator 1 15 to 55 (e.g., when the output vo ltage is 1.5 v, it is expressed as 15.) product type *2 a to h *1. refer to the taping specificat ions at the end of this book. *2. refer to the ? 2. function list according to product type ?. super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator rev.1.0 _02 s-1711 series seiko instruments inc. 7 2. function list according to product type table 1 product type on/off logic discharge shunt function pu ll-up resistance pull-down resistance a active high available none available b active high available none none c active high none none available d active high none none none e active low available available none f active low available none none g active low none available none h active low none none none 3. product name list 3. 1 s-1711 series a type on/off logic : active high pull-up resistance : none discharge shunt function : available pull-down resistance : available table 2 voltage regulator1 output voltage voltage regulator2 output voltage snt-6a sot-23-6 1.5 v 1.0% 1.5 v 1.0% s-1711a1515-i6t1g s-1711a1515-m6t1 2.8 v 1.0% 2.8 v 1.0% s-1711a2828-i6t1g s-1711a2828-m6t1 2.8 v 1.0% 3.0 v 1.0% s-1711a2830-i6t1g s-1711a2830-m6t1 2.5 v 1.0% 1.8 v 1.0% s-1711a2518-i6t1g s-1711a2518-m6t1 2.8 v 1.0% 3.3 v 1.0% s-1711a2833-i6t1g s-1711a2833-m6t1 2.85 v 1.0% 2.85 v 1.0% s-1711a2j2j-i6t1g s-1711a2j2j-m6t1 2.9 v 1.0% 2.9 v 1.0% s-1711a2929-i6t1g s-1711a2929-m6t1 3.0 v 1.0% 3.0 v 1.0% s-1711a3030-i6t1g s-1711a3030-m6t1 2.5 v 1.0% 1.5 v 1.0% s-1711a2515-i6t1g s-1711a2515-m6t1 3.0 v 1.0% 2.5 v 1.0% s-1711a3025-i6t1g s-1711a3025-m6t1 3.0 v 1.0% 3.3 v 1.0% s-1711a3033-i6t1g s-1711a3033-m6t1 1.8 v 1.0% 2.7 v 1.0% s-1711a1827-i6t1g s-1711a1827-m6t1 1.8 v 1.0% 2.75 v 1.0% s-1711a182h-i6t1g s-1711a182h-m6t1 2.4 v 1.0% 2.4 v 1.0% s-1711a2424-i6t1g s-1711a2424-m6t1 2.4 v 1.0% 2.5 v 1.0% s-1711a2425-i6t1g s-1711a2425-m6t1 2.5 v 1.0% 2.5 v 1.0% s-1711a2525-i6t1g s-1711a2525-m6t1 2.8 v 1.0% 1.5 v 1.0% s-1711a2815-i6t1g s-1711a2815-m6t1 2.8 v 1.0% 1.8 v 1.0% s-1711a2818-i6t1g s-1711a2818-m6t1 3.0 v 1.0% 1.8 v 1.0% s-1711a3018-i6t1g s-1711a3018-m6t1 3.0 v 1.0% 1.5 v 1.0% s-1711a3015-i6t1g s-1711a3015-m6t1 1.8 v 1.0% 1.5 v 1.0% s-1711a1815-i6t1g s-1711a1815-m6t1 1.85 v 1.0% 2.8 v 1.0% s-1711a1j28-i6t1g S-1711A1J28-M6T1 2.8 v 1.0% 2.9 v 1.0% s-1711a2829-i6t1g s-1711a2829-m6t1 remark please contact the sii marketing department for pr oducts with specificati ons other than the above. super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator s-1711 series rev.1.0 _02 8 seiko instruments inc. 3. 2 s-1711 series b type on/off logic : active high pull-up resistance : none discharge shunt function : available pull-down resistance : none table 3 voltage regulator1 output voltage voltage regulator2 output voltage snt-6a sot-23-6 2.5 v 1.0% 1.8 v 1.0% s-1711b2518-i6t1g s-1711b2518-m6t1 1.8 v 1.0% 2.8 v 1.0% s-1711b1828-i6t1g s-1711b1828-m6t1 2.5 v 1.0% 2.8 v 1.0% s-1711b2528-i6t1g s-1711b2528-m6t1 2.8 v 1.0% 1.5 v 1.0% s-1711b2815-i6t1g s-1711b2815-m6t1 remark please contact the sii marketing department for pr oducts with specificati ons other than the above. 3. 3 s-1711 series c type on/off logic : active high pull-up resistance : none discharge shunt function : none pull-down resistance : available table 4 voltage regulator1 output voltage voltage regulator2 output voltage snt-6a sot-23-6 1.5 v 1.0% 1.5 v 1.0% s-1711c1515-i6t1g s-1711c1515-m6t1 1.8 v 1.0% 1.5 v 1.0% s-1711c1815-i6t1g s-1711c1815-m6t1 1.8 v 1.0% 2.7 v 1.0% s-1711c1827-i6t1g s-1711c1827-m6t1 1.8 v 1.0% 2.75 v 1.0% s-1711c182h-i6t1g s-1711c182h-m6t1 1.85 v 1.0% 2.8 v 1.0% s-1711c1j28-i6t1g s-1711c1j28-m6t1 2.4 v 1.0% 2.4 v 1.0% s-1711c2424-i6t1g s-1711c2424-m6t1 2.4 v 1.0% 2.5 v 1.0% s-1711c2425-i6t1g s-1711c2425-m6t1 2.5 v 1.0% 1.5 v 1.0% s-1711c2515-i6t1g s-1711c2515-m6t1 2.5 v 1.0% 1.8 v 1.0% s-1711c2518-i6t1g s-1711c2518-m6t1 2.5 v 1.0% 2.5 v 1.0% s-1711c2525-i6t1g s-1711c2525-m6t1 2.8 v 1.0% 1.5 v 1.0% s-1711c2815-i6t1g s-1711c2815-m6t1 2.8 v 1.0% 1.8 v 1.0% s-1711c2818-i6t1g s-1711c2818-m6t1 2.8 v 1.0% 2.8 v 1.0% s-1711c2828-i6t1g s-1711c2828-m6t1 2.8 v 1.0% 2.9 v 1.0% s-1711c2829-i6t1g s-1711c2829-m6t1 2.8 v 1.0% 3.0 v 1.0% s-1711c2830-i6t1g s-1711c2830-m6t1 2.8 v 1.0% 3.3 v 1.0% s-1711c2833-i6t1g s-1711c2833-m6t1 2.85 v 1.0% 2.85 v 1.0% s-1711c2j2j-i6t1g s-1711c2j2j-m6t1 2.9 v 1.0% 2.9 v 1.0% s-1711c2929-i6t1g s-1711c2929-m6t1 3.0 v 1.0% 1.5 v 1.0% s-1711c3015-i6t1g s-1711c3015-m6t1 3.0 v 1.0% 1.8 v 1.0% s-1711c3018-i6t1g s-1711c3018-m6t1 3.0 v 1.0% 2.5 v 1.0% s-1711c3025-i6t1g s-1711c3025-m6t1 3.0 v 1.0% 3.0 v 1.0% s-1711c3030-i6t1g s-1711c3030-m6t1 3.0 v 1.0% 3.3 v 1.0% s-1711c3033-i6t1g s-1711c3033-m6t1 remark please contact the sii marketing department for pr oducts with specificati ons other than the above. super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator rev.1.0 _02 s-1711 series seiko instruments inc. 9 3. 4 s-1711 series d type on/off logic : active high pull-up resistance : none discharge shunt function : none pull-down resistance : none table 5 voltage regulator1 output voltage voltage regulator2 output voltage snt-6a sot-23-6 1.8 v 1.0% 2.8 v 1.0% s-1711d1828-i6t1g s-1711d1828-m6t1 2.5 v 1.0% 1.8 v 1.0% s-1711d2518-i6t1g s-1711d2518-m6t1 2.5 v 1.0% 2.8 v 1.0% s-1711d2528-i6t1g s-1711d2528-m6t1 2.8 v 1.0% 1.5 v 1.0% s-1711d2815-i6t1g s-1711d2815-m6t1 remark please contact the sii marketing department for pr oducts with specificati ons other than the above. super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator s-1711 series rev.1.0 _02 10 seiko instruments inc. ? pin configuration table 6 pin no. symbol description 1 vout1 output voltage pin 1 2 vin input voltage pin 3 vout2 output voltage pin 2 snt-6a top view 1 2 3 4 6 5 4 on/off2 on/off pin 2 figure 9 5 vss gnd pin 6 on/off1 on/off pin 1 table 7 pin no. symbol description 1 vout1 output voltage pin 1 2 vin input voltage pin 3 vout2 output voltage pin 2 4 on/off2 on/off pin 2 5 vss gnd pin 6 on/off1 on/off pin 1 6 4 1 3 2 sot-23-6 top view 5 figure 10 super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator rev.1.0 _02 s-1711 series seiko instruments inc. 11 ? absolute maximum ratings table 8 (ta = 25 c unless otherwise specified) item symbol absolute maximum rating unit v in v ss ? 0.3 v ss + 7 v input voltage v on/off1, 2 v ss ? 0.3 v in + 0.3 v output voltage v out1, 2 v ss ? 0.3 v in + 0.3 v snt-6a 400 * 1 mw 300 *2 mw power dissipation sot-23-6 p d 440 * 3 mw operating ambient temperature t opr ? 40 + 85 c storage temperature t stg ? 40 + 125 c *1. when mounted on printed circuit board [mounted board] (1) board size: 114 mm 76 mm 1.6t mm (2) board name: jedec standard51-7 *2. when not mounted on printed circuit board *3. when mounted on printed circuit board [mounted board] (1) board size: 25 mm 25 mm 1.0t mm caution the absolute maximum ra tings are rated values exceeding whic h the product could suffer physical damage. these values must therefore not be exceeded under any conditions. (1) when mounted on printed circuit board (2) when not mounted on printed circuit board 0 50 100 150 400 200 0 power dissipation (p d ) (mw) ambient temperature (ta) ( c) 500 300 100 snt-6a sot-23-6 0 50 100 150 400 200 0 power dissipation (p d ) (mw) ambient temperature (ta) ( c) 500 300 100 sot-23-6 figure 11 power dissipation of package super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator s-1711 series rev.1.0 _02 12 seiko instruments inc. ? electrical characteristics table 9 total (2 circuits) (ta = 25 c unless otherwise specified) item symbol conditions min. typ. max. unit test circuit current consumption i ss v in = 6.5 v, no load ? 140 180 a 1 voltage regulator 1 or voltage regulator 2 (par circuits) (ta = 25 c unless otherwise specified) item symbol conditions min. typ. max. unit test circuit output voltage *1 v out(e) v in = v out(s) + 1.0 v, i out = 30 ma v out(s) 0.99 v out(s) v out(s) 1.01 v 2, 3 output current *2 i out v in v out(s) + 1.0 v 150 *5 ? ? ma 4, 5 dropout voltage *3 v drop i out = 150 ma v out(s) = 1.5 v 0.50 0.54 0.58 v 2, 3 v out(s) = 1.6 v 0.40 0.44 0.48 v 2, 3 v out(s) = 1.7 v 0.30 0.34 0.39 v 2, 3 1.8 v v out(s) 2.0 v 0.20 0.26 0.39 v 2, 3 2.1 v v out(s) 2.7 v ? 0.24 0.36 v 2, 3 2.8 v v out(s) 5.5 v ? 0.20 0.35 v 2, 3 line regulation out in out1 v v v ? ? ? v out(s) + 0.5 v v in 6.5 v, i out = 30 ma ? 0.02 0.1 % / v 2, 3 load regulation ? v out2 v in = v out(s) + 1.0 v, 1.0 ma i out 150 ma ? 20 40 mv 2, 3 output voltage temperature coefficient *4 out out v ta v ? ? ? v in = v out(s) + 1.0 v, i out = 30 ma, ? 40 ta 85 c ? 100 ? ppm / c 2, 3 current consumption during operation i ss1 v in = v out(s) + 1.0 v, on/off pin = on, no load ? 70 90 a 1 current consumption during shutdown i ss2 v in = v out(s) + 1.0 v, on/off pin = off, no load ? 0.1 1.0 a 1 input voltage v in ? 2.0 ? 6.5 v 1 on/off pin input voltage ?h? v sh v in = v out(s) + 1.0 v, r l = 1.0 k ? 1.5 ? ? v 6, 7 on/off pin input voltage ?l? v sl v in = v out(s) + 1.0 v, r l = 1.0 k ? ? ? 0.3 v 6, 7 a/ c type 1.0 2.5 4.2 a on/off pin input current ?h? i sh v in = 6.5 v, v on/off = 6.5 v b/ d/ e/ f/ g/ h type ? 0.1 ? 0.1 a 6, 7 e/ g type 1.0 2.5 4.2 a on/off pin input current ?l? i sl v in = 6.5 v, v on/off = 0 v a/ b/ c/ d/ f/ h type ? 0.1 ? 0.1 a 6, 7 ripple rejection rr v in = v out(s) + 1.0 v, f = 1.0 khz, ? v rip = 0.5 vrms, i out = 30 ma ? 70 ? db 8, 9 short-circuit current i short v in = v out(s) + 1.0 v, on/off pin = on, v out = 0 v ? 170 ? ma 4, 5 s-1711 series a/b/e/f type (built -in discharge shunt function) item symbol conditions min. typ. max. unit test circuit ?l? output nch on resistance r low v out = 0.1 v, v dd = 6.5 v ? 100 ? ? 4, 5 s-1711 series a/c/e/g type (built -in pull-up/pull-down resistance) item symbol conditions min. typ. max. unit test circuit shutdown pull-up/pull-down resistance r pd ? 1.0 2.6 5.0 m ? 6, 7 super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator rev.1.0 _02 s-1711 series seiko instruments inc. 13 *1. v out(s) : specified output voltage v out(e) : actual output volt age at the fixed load the output voltage when fixing i out (=30 ma) and inputting v out(s) +1.0 v *2. the output current at which t he output voltage becomes 95% of v out(e) after gradually increasing the output current. *3. v drop = v in1 ? (v out3 0.98) v out3 is the output voltage when v in = v out(s) + 1.0 v and i out = 150 ma. v in1 is the input voltage at which the output voltage becomes 98% of v out3 after gradually decreasing the input voltage. *4. the change in temperature [mv/c] is calculated using the following equation. [] [] [] 1000 c ppm/ v ? ta ? v v v c mv/ ? ta ? v out out out(s) out ? = *3 *2 *1 *1. the change in temperatur e of the output voltage *2. specified output voltage *3. output voltage temperature coefficient *5. the output current can be at least this value. due to restrictions on the package power dissipation, this value may not be satisfi ed. attention should be paid to the power dissipation of the package when t he output current is large. this specification is guaranteed by design. super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator s-1711 series rev.1.0 _02 14 seiko instruments inc. ? test circuits 1. vin vout2 vout1 on/off2 on/off1 vss a *1 *1 *1. set to v in or gnd + figure 12 2. vin vout2 vout1 on/off2 on/off1 vss a *1 * 2 + v + *1. set to power-off *2. set to power-on figure 13 3. *1 * 2 *1. set to power-on *2. set to p ower-off a + + v vin vout2 vout1 on/off2 on/off1 vss figure 14 4. vin vout2 vout1 on/off2 on/off1 vss a *1 * 2 + v *1. set to power-off *2. set to v in or gnd figure 15 5. *1 * 2 *1. set to v in or gnd *2. set to power-off a + v vin vout2 vout1 on/off2 on/off1 vss figure 16 super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator rev.1.0 _02 s-1711 series seiko instruments inc. 15 6. vin vout2 vout1 on/off2 on/off1 vss a *1 + v *1. set to power-off r l figure 17 7. *1 + *1. set to power-off r l vin vout2 vout1 on/off2 on/off1 vss a v figure 18 8. *1 + v *1. set to power-off *2. set to p ower-on r l vin vout2 vout1 on/off2 on/off1 vss * 2 figure 19 9. *1 *1. set to power-on *2. set to p ower-off * 2 + r l v vin vout2 vout1 on/off2 on/off1 vss figure 20 super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator s-1711 series rev.1.0 _02 16 seiko instruments inc. ? standard circuit *1. c in is a capacitor for stabilizing the input. *2. a ceramic capacitor of 1.0 f or more can be used for c l1 and c l2. vout1 on/off1 on/off2 gnd vin vout2 single gnd output 1 input vss output 2 c l2 *2 c l1 *2 c in * 1 figure 21 caution the above connection diagram and constant will not guara ntee successful operation. perform thorough evaluation using the actual application to set the constant. ? application conditions input capacitor (c in ): 1.0 f or more output capacitor (c l1 , c l2 ): 1.0 f or more esr of output capacitor: 1.0 ? or less caution a general series regulator ma y oscillate, depending on th e external components selected. check that no oscillation occurs with the application using the above capacitor. use input/output capacitor which has good temperature characteristics (conforms to the characteristics of ceramic capacitor b). ? selection of input and output capacitors (c in , c l1 , c l2 ) the s-1711 series requires an output capac itor between the vout and vss pins fo r phase compensation. operation is stabilized by a ceramic capacitor with an output c apacitance of 1.0 f or more in the entire temperature range. however, when using an os capacitor, tantalum capacitor, or aluminum electrolytic capacitor, a ceramic capacitor with a capacitance of 1.0 f or more and an esr of 1.0 ? or less is required. the value of the output overshoot or undershoot transi ent response varies depending on the value of the output capacitor. the required capacitance of the i nput capacitor differs depending on the application. the recommended value for an application is 1.0 f or more for c in and 1.0 f or more for c l1 equaling c l2 ; however, when selecting the output capacitor, perform sufficient evaluat ion, including evaluation of temperature characteristics, on the actual device. super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator rev.1.0 _02 s-1711 series seiko instruments inc. 17 ? explanation of terms 1. low dropout voltage regulator the low dropout voltage regulator is a voltage regulator whose dropout voltage is low due to its built-in low on- resistance transistor. 2. low esr a capacitor whose esr (equivalent series resistance) is low. the s-1711 series enables use of a low esr capacitor, such as a ceramic capacit or, for the output-side capacitor c l1 , c l2 . a capacitor whose esr is 1.0 ? or less can be used. 3. output voltage (v out ) the accuracy of the output voltage is ensured at 1.0% under the specified conditions of fixed input voltage *1 , fixed output current, and fixed temperature. *1. differs depending on the product. caution if the above conditions ch ange, the output voltage value may vary and exceed the accuracy range of the output voltage. please see the electrical characteristics and attached characteristics data for details. 4. v ? v ? v regulation line out in out1 ? ? ? ? ? ? ? ? ? indicates the dependency of the output voltage on the input voltage. that is, the values show how much the output voltage changes due to a change in the input voltage with the output current remaining unchanged. 5. load regulation ( ? v out2 ) indicates the dependency of the output voltage on the output current. that is, the values show how much the output voltage changes due to a change in the output current with the input voltage remaining unchanged. 6. dropout voltage (v drop ) indicates the difference between the input voltage v in1 , which is the input voltage (v in ) at the point where the output voltage has fallen to 98% of the output voltage value v out3 after v in was gradually decreased from v in = v out(s) + 1.0 v, and the output voltage at that point (v out3 0.98). v drop = v in1 ? (v out3 0.98) super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator s-1711 series rev.1.0 _02 18 seiko instruments inc. 7. ? ? ? ? ? ? ? ? ? out out v ta v voltage output of t coefficien e temperatur the shadowed area in figure 22 is the range where v out varies in the operating temperature range when the temperature coefficient of the output voltage is 100 ppm/ c. v out ( e ) *1 ex. v out = 2.8 v typ. ? 40 25 + 0.28 mv / c v out [v] *1. v out(e) is the value of the output voltage measured at 25 c. 85 ta [ c] ? 0.28 mv / c figure 22 a change in the temperature of the output voltage [mv/c] is calculated using the following equation. [] [] [] 1000 c ppm/ v ? ta ? v v v c mv/ ? ta ? v out out out(s) out ? = *3 *2 *1 *1. change in temperature of output voltage *2. specified output voltage *3. output voltage temperature coefficient super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator rev.1.0 _02 s-1711 series seiko instruments inc. 19 ? operation 1. basic operation figure 23 shows the block diagram of the s-1711 series. the error amplifier compares the reference voltage (v ref ) with v fb , which is the output voltage resistance-divided by feedback resistors r s and r f . it supplies the output transistor with the gate voltage necessary to ensure a certain output voltage free of any fluctuations of input voltage and temperature. *1 *1 . parasitic diode vss current supply ? + v fb v ref vin vout r f r s error amplifier reference voltage circuit figure 23 2. output transistor the s-1711 series uses a low on-resistance p- channel mos fet as the output transistor. be sure that v out does not exceed v in + 0.3 v to prevent the voltage regulator from being damaged due to inverse current flowing from the vout pin through a parasitic diode to the vin pin. super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator s-1711 series rev.1.0 _02 20 seiko instruments inc. 3. on/off pins 1 and 2 these pins start and stop the regulator. when the on/off pin is set to the shutdown level, the entire internal circuit stops operating, and the built-in p- channel mos fet output transistor betw een the vin and vout pins is turned off, reducing current consumption significantly. since the s-1711 series a/ b/ e/ f types have a built-in discharge shunt circuit to discharge the output capacitance, the vout pin is forcibly set to vss level. in the s-1711 series c/ d/ g/ and h types, the vout pin is set to vss level through several hundred k ? internal divided resistors between the vo ut and vss pins. note that the current consumption increases when a voltage of 0.3 v to vin ? 0.3 v is applied to the on/off pin. the on/off pin is configured as shown in figures 24 and 25 . in the s-1711 series a/ c/ e/ g types, the on/off pin is internally pulled up or pulled down to vss when in the fl oating status, so the vout pi n is set to the vss level. in the s-1711 series b/ d/ f/ h types, the on/off pin is not internally pulled up or pulled down, so do not use these types with the on/off pin in the floating status. when the on/off pin is not used in the s-1711 series b/ d/ f/ h types, connect the pin to the vin pin in the b/ d types, and connect it to the vss pin in the f/ h types. table 10 logic type on/off pin internal circuits vout pin voltage current consumption a/ b/ c/ d ?h?: power on operating set value i ss1 *1 a/ b/ c/ d ?l?: shutdown stopped v ss level i ss2 e/ f/ g/ h ?h?: shutdown stopped v ss level i ss2 e/ f/ g/ h ?l?: power on operating set value i ss1 *1 *1 . note with caution that the power consumption of the ic is higher by that to be input to pull-up resistance or pull-down resistance the power off pin when the s-1711 series a/ c types operated with the on/off pin connected to vin and the s-1711 seri es e/ g types with the on/off pin connected to vss (refer to figure 24 ). (1) s-1711 series a/ c/ e/ g type (2) s-1711 series b/ d/ f/ h type vss vin on/off e/g type a/c type vss vin on/off figure 24 figure 25 super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator rev.1.0 _02 s-1711 series seiko instruments inc. 21 4. discharge shunt function (s-1711 series a/ b/ e/ f types) the s-1711 series a/ b/ e/ f types have built-in discharge shunt circuits to discharge the output capacitance. when the on/off pin is set to shutdown leve l, turns the output transistor off, and tu rns the discharge shunt function on so that the output c apacitor discharges. these types allow for the vout pin reach vss level rapidly when compared with the s-1711 series c/ d/ g/ h types that does not have discharge shunt circuits. output transistor : off on/off pin : power off vin on/off vss on/off circuit discharge shunt function : on vout *1 *1 . parasitic diode current flow gnd *1 s-1711 series output capacitance (c l ) figure 26 5. pull-down/pull-up resistor (s-1711 series a/ c/ e/ g types) in the s-1711 series a/ c/ e/ g types, the on/off pin is internally pulled up to vin or pulled down to vss, so the vout pin is in the vss level when in the floating status. note with caution that the power consumption of the ic is higher by that to be input to pull-up resistance or pull-down resistance the power off pin when the s-1711 series a/ c types operated with the on/off pin connected to vin and the s-1711 series e/ g types with the on/off pin connected to vss. super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator s-1711 series rev.1.0 _02 22 seiko instruments inc. ? precautions ? wiring patterns for the vin, vout and gnd pins should be designed so that the impedance is low. when mounting an output capacitor between the vout and vss pins (c l1 , c l2 ) and a capacitor for stabiliz ing the input between vin and vss pins (c in ), the distance from the capacitors to t hese pins should be as short as possible. ? note that the output voltage may increase when a series r egulator is used at low load current (1.0 ma or less). ? note that the output voltage may increase due to driv er leakage when a series regulator is used at high temperatures. ? generally a series regulator may c ause oscillation, depending on the selecti on of external parts. the following conditions are recommended for this ic. however, be sure to perform sufficient evaluation under the actual usage conditions for selection, including evaluation of temperature characteristics. input capacitor (c in ): 1.0 f or more output capacitor (c l1 , c l2 ): 1.0 f or more equivalent series resistance (esr): 1.0 ? or less use input/output capacitor which has good temperature characteristics (conforms to the characteristics of ceramic capacitor b). ? the voltage regulator may oscillate w hen the impedance of the power supply is high and the i nput capacitor is small or an input capacitor is not connected. ? if the capacitance of the ic?s output block is small, the power supply fluctuation and load fluctuation characteristics become worse. it is therefore important to sufficiently evaluate the output voltage fluctuation in the actual equipment. ? when the capacitance of the ic?s output block is sma ll, if the power supply suddenly increases sharply, a momentary overshoot may be output. it is therefore important to sufficiently evaluate the output voltage at power application in the actual equipment. ? the application conditions for the input voltage, output voltage, and load current should not exceed the package power dissipation. ? do not apply an electrostatic discharge to this ic that ex ceeds the performance ratings of the built-in electrostatic protection circuit. ? in determining the output current, attention should be paid to the output current value specified in table 9 in the electrical characteristics and footnote *5) of the table. ? sii claims no responsibility for any dis putes arising out of or in connecti on with any infringement by products including this ic of patents owned by a third party. super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator rev.1.0 _02 s-1711 series seiko instruments inc. 23 ? typical characteristics (per circuit) (1) output voltage vs. output current (when load current increases) (ta = 25c) v out = 1.5 v v out = 3.0 v 0 100 200 400 v out [v] 1.5 1.0 0.5 0 i out [ma] 2.0 300 v in = 1.8 v 2.0 v 2.5 v 6.5 v v out [v] 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 i out [ma] 4.0 0 100 200 400 300 v in = 3.3 v 3.5 v 4.0 v 6.5 v v out = 5.0 v 0 100 200 400 v out [v] 5 3 1 0 i out [ma] 6 300 v in = 5.3 v 5.5 v 6.0 v 6.5 v 4 2 remark in determining the output current, attention should be paid to the following. 1. the minimum output current value and footnote *5 specified in table 9 in the ? electrical characteristics ? 2. the package power dissipation (2) output voltage vs. input voltage (ta = 25c) v out = 1.5 v v out = 3.0 v 1.0 1.5 2.0 2.5 3.0 v out [v] 1.6 1.5 1.4 1.3 1.2 1.1 1.0 v in [v] 3.5 i out = 1 ma i out = 50 ma i out = 30 ma 2.5 3.0 3.5 4.0 4.5 v out [v] 3.1 3.0 2.9 2.8 2.7 2.6 2.5 v in [v] 5.0 i out = 1 ma i out = 50 ma i out = 30 ma v out = 5.0 v 2.0 3.0 4.0 5.0 6.0 v out [v] 5.5 5.0 4.5 4.0 3.5 3.0 2.5 v in [v] 7.0 i out = 1 ma i out = 50 ma i out = 30 ma super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator s-1711 series rev.1.0 _02 24 seiko instruments inc. (3) dropout voltage vs. output current v out = 1.5 v v out = 3.0 v 0 100 200 v drop [v] 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0 i out [ma] 150 85 c 25 c -40 c 50 0 100 200 v drop [v] 0.25 0.20 0.15 0.10 0.05 0 i out [ma] 150 50 85 c 25 c -40 c v out = 5.0 v 0 100 200 v drop [v] 0.18 0.14 0.12 0.10 0.08 0.06 0.04 0.02 0 i out [ma] 150 50 85 c 25 c -40 c 0.16 (4) dropout voltage vs. set output voltage 0 23 v drop [v] 0.35 0.30 0.25 0.20 0.15 0.10 0.05 v ota [v] 1 456 0 150 ma 100 ma 50 ma 30 ma 10 ma 80 ma super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator rev.1.0 _02 s-1711 series seiko instruments inc. 25 (5) output voltage vs. ambient temperature v out = 1.5 v v out = 3.0 v -40 0 25 50 75 v out [v] 1.60 1.50 1.45 1.40 ta [ c ] 1.55 -25 85 -40 0 25 50 75 v out [v] 3.20 3.00 2.90 2.80 ta [ c ] 3.10 -25 85 3.05 2.95 2.85 3.15 v out = 5.0 v -40 0 25 50 75 v out [v] 5.3 5.0 4.9 4.7 ta [ c ] 5.2 -25 85 5.1 4.8 (6) current consumption vs. input voltage v out = 1.5 v v out = 3.0 v 02 567 i ss1 [ a] 80 60 40 20 0 v in [v] 1 34 100 90 70 50 30 10 85 c 25 c -40 c 02 567 i ss1 [ a] 80 60 40 20 0 v in [v] 1 34 100 90 70 50 30 10 85 c 25 c -40 c v out = 5.0 v 02 567 i ss1 [ a] 80 60 40 20 0 v in [v] 1 34 100 90 70 50 30 10 85 c 25 c -40 c super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator s-1711 series rev.1.0 _02 26 seiko instruments inc. (7) ripple rejection (ta = 25c) v out = 1.5 v v in = 2.5 v, c out = 1.0 f v out = 3.0 v v in = 4.0 v, c out = 1.0 f 10 100 1k 10k 100k ripple rejection [db] 0 20 40 60 80 frequency [hz] 1m 100 i out = 150 ma i out = 30 ma i out = 1 ma 10 100 1k 10k 100k ripple rejection [db] 0 20 40 60 80 frequency [hz] 1m 100 i out = 150 ma i out = 30 ma i out = 1 ma v out = 5.0 v v in = 6.0 v, c out = 1.0 f 10 100 1k 10k 100k ripple rejection [db] 0 20 40 60 80 frequency [hz] 1m 100 i out = 150 ma i out = 30 ma i out = 1 ma super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator rev.1.0 _02 s-1711 series seiko instruments inc. 27 ? reference data (per circuit) (1) input transient response characteristics (ta = 25c) common to vr1 and 2 v out = 1.5 v i out = 30 ma, tr = tf = 5.0 s, c out = 1.0 f, c in = 1.0 f v out = 3.0 v i out = 30 ma, tr = tf = 5.0 s, c out = 1.0 f, c in = 1.0 f v out [v] 1.56 1.55 1.54 1.53 1.52 1.51 1.50 1.49 1.48 t [ s] v in [v] 4.0 3.0 2.5 2.0 0 0.5 1.0 1.5 3.5 -20 80 120 0 20 40 60 100 140 -40 v out v in 3.04 3.03 3.02 3.01 3.00 2.99 2.98 v out [v] t [ s] v in [v] 6 5 4 0 1 2 3 -20 80 120 0 20 40 60 100 140 -40 v out v in v out = 5.0 v i out = 30 ma, tr = tf = 5.0 s, c out = 1.0 f, c in = 1.0 f 5.06 5.05 5.04 5.03 5.02 5.01 5.00 4.99 4.98 -20 80 120 v out [v] t [ s] v in [v] 8 6 5 4 0 1 2 3 7 0 20 40 60 100 140 -40 v out v in (2) load transient response characteristics (ta = 25c) v out = 1.5 v v in = 2.5 v, c out = 1.0 f, c in = 1.0 f, i out = 50 ? 100 ma v out = 3.0 v v in = 4.0 v, c out = 1.0 f, c in = 1.0 f, i out = 50 ? 100 ma v out [v] 1.70 1.55 1.50 1.45 1.40 t [ s] i out [ma] 150 -150 -50 0 -100 100 50 1.60 1.65 v out i out -10 40 60 0102030 50 70 -20 v out [v] 3.20 2.90 t [ s] -150 3.05 i out [ma] 150 -50 -100 100 50 0 3.00 2.95 3.10 3.15 v out i out -10 40 60 0102030 50 70 -20 v out = 5.0 v v in =6.0 v, c out = 1.0 f, c in = 1.0 f, i out = 50 ? 100 ma v out [v] t [ s] 5.20 4.90 -150 5.05 i out [ma] 150 -50 -100 100 50 0 5.00 4.95 5.10 5.15 -10 40 60 0102030 50 70 -20 v out i out super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator s-1711 series rev.1.0 _02 28 seiko instruments inc. (3) on / off pin transient response characteristics (ta = 25c) vout = 1.5 v v in = 2.5 v, c out = 1.0 f, c in = 1.0 f , i out = 100 ma v out = 3.0 v v in = 4.0 v, c out = 1.0 f, c in = 1.0 f, i out = 100 ma -50 v out [v] 2.5 2.0 1.5 1.0 0.5 0 -0.5 t [ s] 0 50 100 150 200 v out v in 3.0 3.5 v in [v] 3 1 0 -1 -5 -4 -3 -2 2 -50 v out [v] 5 4 3 2 1 0 -1 t [ s] 0 50 100 150 200 v out v in 6 7 v in [v] 6 2 0 -2 -10 -8 -6 -4 4 v out = 5.0 v v in = 6.0 v, c out = 1.0 f, c in = 1.0 f, i out = 100 ma -50 v out [v] 12.5 10.0 7.5 5.0 2.5 0 -2.5 t [ s] 0 50 100 150 200 v out v in 15.0 17.5 v in [v] 8 4 2 0 -8 -6 -4 -2 6 (4) output capacitance vs. discharge time characteristics (ta = 25c) v in = v out + 1.0 v, i out = no load, v on/off = v out + 1.0 v v ss , tf = 1 s 0 t dsc [ms] 2.5 2.0 1.5 1.0 0.5 0 c l [ f] 268 10 12 3.0 3.5 4 v out v on/off 1 s t dsc v out 10% v ss v in = v out + 1.0 v v on/off = v out + 1.0 v ? v ss figure 27 measurement condition of discharge time super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator rev.1.0 _02 s-1711 series seiko instruments inc. 29 ? marking specifications (1) snt-6a (1) to (3) : product code (refer to product name vs. product code ) (4) to (6) : lot number snt-6a top view 1 2 3 4 6 5 (1) (4) (2) (5) (3) (6) product name vs. product code (a) s-1711 series a type (b) s-1711 series b type product code product code product name (1) (2) (3) product name (1) (2) (3) s-1711a1515-i6t1g q r a s-1711b2518-i6t1g q u a s-1711a2828-i6t1g q r b s-1711b1828-i6t1g q u b s-1711a2830-i6t1g q r d s-1711b2528-i6t1g q u c s-1711a2518-i6t1g q r e s-1711b2815-i6t1g q u d s-1711a2833-i6t1g q r g s-1711a2j2j-i6t1g q r h s-1711a2929-i6t1g q r j s-1711a3030-i6t1g q r k s-1711a2515-i6t1g q r l s-1711a3025-i6t1g q r m s-1711a3033-i6t1g q r n s-1711a1827-i6t1g q r p s-1711a182h-i6t1g q r q s-1711a2424-i6t1g q r r s-1711a2425-i6t1g q r s s-1711a2525-i6t1g q r t s-1711a2815-i6t1g q r u s-1711a2818-i6t1g q r v s-1711a3018-i6t1g q r w s-1711a3015-i6t1g q r x s-1711a1815-i6t1g q r y s-1711a1j28-i6t1g q r z s-1711a2829-i6t1g q r 2 remark please contact the sii marketing department for pr oducts with specificati ons other than the above. super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator s-1711 series rev.1.0 _02 30 seiko instruments inc. (c) s-1711 series c type (d) s-1711 series d type product code product code product name (1) (2) (3) product name (1) (2) (3) s-1711c1515-i6t1g q s a s-1711d1828-i6t1g q u n s-1711c1815-i6t1g q s b s-1711d2518-i6t1g q u o s-1711c1827-i6t1g q s c s-1711d2528-i6t1g q u p s-1711c182h-i6t1g q s d s-1711d2815-i6t1g q u q s-1711c1j28-i6t1g q s e s-1711c2424-i6t1g q s f s-1711c2425-i6t1g q s g s-1711c2515-i6t1g q s h s-1711c2518-i6t1g q s i s-1711c2525-i6t1g q s j s-1711c2815-i6t1g q s k s-1711c2818-i6t1g q s l s-1711c2828-i6t1g q s m s-1711c2829-i6t1g q s n s-1711c2830-i6t1g q s o s-1711c2833-i6t1g q s p s-1711c2j2j-i6t1g q s q s-1711c2929-i6t1g q s r s-1711c3015-i6t1g q s s s-1711c3018-i6t1g q s t s-1711c3025-i6t1g q s u s-1711c3030-i6t1g q s v s-1711c3033-i6t1g q s w remark please contact the sii marketing department for pr oducts with specificati ons other than the above. super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator rev.1.0 _02 s-1711 series seiko instruments inc. 31 (2) sot-23-6 (1) to (3): product code (refer to product name vs. product code ) (4): lot number 6 4 1 3 2 (1) (2) (3) (4) sot-23-6 to p view 5 product name vs. product code (a) s-1711 series a type (b) s-1711 series b type product code product code product name (1) (2) (3) product name (1) (2) (3) s-1711a1515-m6t1 q r a s-1711b2518-m6t1 q u a s-1711a2828-m6t1 q r b s-1711b1828-m6t1 q u b s-1711a2830-m6t1 q r d s-1711b2528-m6t1 q u c s-1711a2518-m6t1 q r e s-1711b2815-m6t1 q u d s-1711a2833-m6t1 q r g s-1711a2j2j-m6t1 q r h s-1711a2929-m6t1 q r j s-1711a3030-m6t1 q r k s-1711a2515-m6t1 q r l s-1711a3025-m6t1 q r m s-1711a3033-m6t1 q r n s-1711a1827-m6t1 q r p s-1711a182h-m6t1 q r q s-1711a2424-m6t1 q r r s-1711a2425-m6t1 q r s s-1711a2525-m6t1 q r t s-1711a2815-m6t1 q r u s-1711a2818-m6t1 q r v s-1711a3018-m6t1 q r w s-1711a3015-m6t1 q r x s-1711a1815-m6t1 q r y S-1711A1J28-M6T1 q r z s-1711a2829-m6t1 q r 2 remark please contact the sii marketing department for pr oducts with specificati ons other than the above. super-small package 2-circuit high ripple-reject ion low dropout cmos voltage regulator s-1711 series rev.1.0 _02 32 seiko instruments inc. (c) s-1711 series c type (d) s-1711 series d type product code product code product name (1) (2) (3) product name (1) (2) (3) s-1711c1515-m6t1 q s a s-1711d1828-m6t1 q u n s-1711c1815-m6t1 q s b s-1711d2518-m6t1 q u o s-1711c1827-m6t1 q s c s-1711d2528-m6t1 q u p s-1711c182h-m6t1 q s d s-1711d2815-m6t1 q u q s-1711c1j28-m6t1 q s e s-1711c2424-m6t1 q s f s-1711c2425-m6t1 q s g s-1711c2515-m6t1 q s h s-1711c2518-m6t1 q s i s-1711c2525-m6t1 q s j s-1711c2815-m6t1 q s k s-1711c2818-m6t1 q s l s-1711c2828-m6t1 q s m s-1711c2829-m6t1 q s n s-1711c2830-m6t1 q s o s-1711c2833-m6t1 q s p s-1711c2j2j-m6t1 q s q s-1711c2929-m6t1 q s r s-1711c3015-m6t1 q s s s-1711c3018-m6t1 q s t s-1711c3025-m6t1 q s u s-1711c3030-m6t1 q s v s-1711c3033-m6t1 q s w remark please contact the sii marketing department for pr oducts with specificati ons other than the above. ! "# # $ ! ! !% & ' (( " ! " ) ! $ ) ! #! ! ! ! ! ! !* + +, $ " & ! ! +- . & ) & / *0 / *0 12 3 3 4+5 ((+657 +4,+ 3 4 !8 ! "# # $ "# # $ % #&' $ ( ( ! "# $ "# $ % ) )* +, , ! - * !. / 0 )1 ( - 20 - 20 34 5 ! 6) 7, , )8 7 . ! )6 *) "# 9 $ "# 9 $ % 96 the information described herein is subject to change without notice. seiko instruments inc. is not responsible for any problems caused by circuits or diagrams described herein whose related industrial properties, patents, or other rights belong to third parties. the application circuit examples explain typical applications of the products, and do not guarantee the success of any specific mass-production design. when the products described herein are regulated products subject to the wassenaar arrangement or other agreements, they may not be exported without authorization from the appropriate governmental authority. use of the information described herein for other purposes and/or reproduction or copying without the express permission of seiko instruments inc. is strictly prohibited. the products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of seiko instruments inc. although seiko instruments inc. exerts the greatest possible effort to ensure high quality and reliability, the failure or malfunction of semiconductor products may occur. the user of these products should therefore give thorough consideration to safety design, including redundancy, fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community damage that may ensue. |
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