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rev.2.0 _01 high operating voltage cmos voltage regulator s-812c series seiko instruments inc. 1 the s-812c series is a family of high-voltage positive regulators developed using cmos technology. the maximum operating voltage of 16 v makes the s-812c series best in high-voltage applications. not only current consumption is small but also shutdown function is included, the regulator is also suitable in constructing low-power portable devices. combination of power-off function and short-current protection can be selected. ? features ? low current consumption operating current: typ. 1.0 a, max. 1.8 a (3.0 v) ? output voltage: 2.0 to 6.0 v, selectable in 0.1 v steps ? output voltage accuracy: 2.0% ? output current: 50 ma capable (3.0 v output product, v in =5 v) *1 75 ma capable (5.0 v output product, v in =7 v) *1 ? dropout voltage: typ. 120 mv (v out = 5.0 v, i out = 10 ma) ? power-off function: polarity for shutdown switch or removal of the shutdown function can be selected. ? short-circuit protection: product with/without short-circuit protection is available. short-circuited current : 40 ma typ. for products with protection ? operating voltage: 16 v maximum. *1. attention should be paid to the power dissi pation of the package when the load is large. ? applications ? power source for home elec tric/electronic appliances ? power source for battery-powered devices ? power source for personal communication devices ? packages package name drawing code package tape reel zigzag snt-6a(h) pi006-a pi006-a pi006-a ? sot-23-5 mp005-a mp005-a mp005-a ? sot-89-3 up003-a up003-a up003-a ? sot-89-5 up005-a up005-a up005-a ? to-92 (bulk) ys003-b ? ? ? to-92 (tape and reel) yf003-a yf003-a yf003-a ? to-92 (tape and ammo) yf003-a yz003-c ? yz003-c
high operating voltage cmos voltage regulator s-812c series rev.2.0 _01 2 seiko instruments inc. ? block diagrams 1. s-812cxxa series (no short-circui t protection and shutdown function) vss vout vin *1 reference voltage *1. parasitic diode figure 1 2. s-812cxxb series (short-circuit protection and shutdown function) vss vout on/off vin * 1 short-circuit protection reference voltage *1. parasitic diode figure 2
high operating voltage cmos voltage regulator rev.2.0 _01 s-812c series seiko instruments inc. 3 ? product name structure the product types, output voltage value and package types for the s-812c series can be se lected at the user?s request. refer to the ?product name? for the constructi on of the product name and ?product name list? for the full product names 1. product name 1. 1 s-812cxxa series 1. 1. 1 package sot-23-5, sot-89-3, sot-89-5 s-812c xx a xx - xxx - t2 ic direction in tape specifications *1 product name (abbreviation) package name (abbreviation) *2 mc :sot-23-5 ua :sot-89-3 uc :sot-89-5 short-circuit protection and shutdown function a : no output voltage 20 to 60 (e.g. when the output voltage is 2.0 v, it is expressed 20) *1. refer to the taping specifications. *2. refer to the ? 2. product name list ?. 1. 1. 2 package to-92 s-812c xx a y - x product name (abbreviation) b : bulk t : tape and reel z : tape and ammo package name (abbreviation) *1 y : to-92 short-circuit protection and shutdown function a : no output voltage 20 to 60 (e.g. when the output voltage is 2.0 v, it is expressed 20) *1. refer to the ? 2. product name list ?.
high operating voltage cmos voltage regulator s-812c series rev.2.0 _01 4 seiko instruments inc. 1. 2 s-812cxxb series 1. 2. 1 package snt-6a(h) s-812c xx b pi - xxx tf g fixed ic direction in tape specifications *1 product name (abbreviation) package name (abbreviation) *2 pi : snt-6a(h) short-circuit protection and shutdown function b : yes off / on pin positive logic (operates by ?h?) output voltage 20 to 60 (e.g. when the output voltage is 2.0v, it is expressed 20) *1. refer to the taping specifications. *2. refer to the ? 2. product name list ?. 1. 2. 2 package sot-23-5 sot-89-5 s-812c xx b xx - xxx - t2 ic direction in tape specifications *1 product name (abbreviation) package name (abbreviation) *2 mc :sot-23-5 uc :sot-89-5 short-circuit protection and shutdown function b : yes off / on pin positive logic (operates by ?h?) output voltage 20 to 60 (e.g. when the output voltage is 2.0 v, it is expressed 20) *1. refer to the taping specifications. *2. refer to the ? 2. product name list ?.
high operating voltage cmos voltage regulator rev.2.0 _01 s-812c series seiko instruments inc. 5 2. product name list 2. 1 s-812cxxa series (no short-circuit protection and shutdown function) table 1 output voltage sot-23-5 sot-89-3 sot-89-5 to-92 *1 2.0 v 2.0 % s-812c20amc-c2a-t2 s-812c20aua-c2a-t2 ? s-812c20ay-x 2.1 v 2.0 % s-812c21amc-c2b-t2 s-812c21aua-c2b-t2 ? s-812c21ay-x 2.2 v 2.0 % s-812c22amc-c2c-t2 s-812c22aua-c2c-t2 ? s-812c22ay-x 2.3 v 2.0 % s-812c23amc-c2d-t2 s-812c23aua-c2d-t2 ? s-812c23ay-x 2.4 v 2.0 % s-812c24amc-c2e-t2 s-812c24aua-c2e-t2 ? s-812c24ay-x 2.5 v 2.0 % s-812c25amc-c2f-t2 s-812c25aua-c2f-t2 ? s-812c25ay-x 2.6 v 2.0 % s-812c26amc-c2g-t2 s-812c26aua-c2g-t2 ? s-812c26ay-x 2.7 v 2.0 % s-812c27amc-c2h-t2 s-812c27aua-c2h-t2 ? s-812c27ay-x 2.8 v 2.0 % s-812c28amc-c2i-t2 s-812c28aua-c2i-t2 ? s-812c28ay-x 2.9 v 2.0 % s-812c29amc-c2j-t2 s-812c29aua-c2j-t2 ? s-812c29ay-x 3.0 v 2.0 % s-812c30amc-c2k-t2 s-812c30aua-c2k-t2 ? s-812c30ay-x 3.1 v 2.0 % s-812c31amc-c2l-t2 s-812c31aua-c2l-t2 ? s-812c31ay-x 3.2 v 2.0 % s-812c32amc-c2m-t2 s-812c32aua-c2m-t2 ? s-812c32ay-x 3.3 v 2.0 % s-812c33amc-c2n-t2 s-812c33aua-c2n-t2 ? s-812c33ay-x 3.4 v 2.0 % s-812c34amc-c2o-t2 s-812c34aua-c2o-t2 ? s-812c34ay-x 3.5 v 2.0 % s-812c35amc-c2p-t2 s-812c35aua-c2p-t2 ? s-812c35ay-x 3.6 v 2.0 % s-812c36amc-c2q-t2 s-812c36aua-c2q-t2 ? s-812c36ay-x 3.7 v 2.0 % s-812c37amc-c2r-t2 s-812c37aua-c2r-t2 ? s-812c37ay-x 3.8 v 2.0 % s-812c38amc-c2s-t2 s-812c38aua-c2s-t2 ? s-812c38ay-x 3.9 v 2.0 % s-812c39amc-c2t-t2 s-812c39aua-c2t-t2 ? s-812c39ay-x 4.0 v 2.0 % s-812c40amc-c2u-t2 s-812c40aua-c2u-t2 ? s-812c40ay-x 4.1 v 2.0 % s-812c41amc-c2v-t2 s-812c41aua-c2v-t2 ? s-812c41ay-x 4.2 v 2.0 % s-812c42amc-c2w-t2 s-812c42aua-c2w-t2 ? s-812c42ay-x 4.3 v 2.0 % s-812c43amc-c2x-t2 s-812c43aua-c2x-t2 ? s-812c43ay-x 4.4 v 2.0 % s-812c44amc-c2y-t2 s-812c44aua-c2y-t2 ? s-812c44ay-x 4.5 v 2.0 % s-812c45amc-c2z-t2 s-812c45aua-c2z-t2 ? s-812c45ay-x 4.6 v 2.0 % s-812c46amc-c3a-t2 s-812c46aua-c3a-t2 ? s-812c46ay-x 4.7 v 2.0 % s-812c47amc-c3b-t2 s-812c47aua-c3b-t2 ? s-812c47ay-x 4.8 v 2.0 % s-812c48amc-c3c-t2 s-812c48aua-c3c-t2 ? s-812c48ay-x 4.9 v 2.0 % s-812c49amc-c3d-t2 S-812C49AUA-C3D-T2 ? s-812c49ay-x 5.0 v 2.0 % s-812c50amc-c3e-t2 s-812c50aua-c3e-t2 ? s-812c50ay-x 5.1 v 2.0 % s-812c51amc-c3f-t2 s-812c51aua-c3f-t2 ? s-812c51ay-x 5.2 v 2.0 % s-812c52amc-c3g-t2 s-812c52aua-c3g-t2 ? s-812c52ay-x 5.3 v 2.0 % s-812c53amc-c3h-t2 s-812c53aua-c3h-t2 ? s-812c53ay-x 5.4 v 2.0 % s-812c54amc-c3i-t2 s-812c54aua-c3i-t2 ? s-812c54ay-x 5.5 v 2.0 % s-812c55amc-c3j-t2 s-812c55aua-c3j-t2 ? s-812c55ay-x 5.6 v 2.0 % s-812c56amc-c3k-t2 s-812c56aua-c3k-t2 ? s-812c56ay-x 5.7 v 2.0 % s-812c57amc-c3l-t2 s-812c57aua-c3l-t2 ? s-812c57ay-x 5.8 v 2.0 % s-812c58amc-c3m-t2 s-812c58aua-c3m-t2 ? s-812c58ay-x 5.9 v 2.0 % s-812c59amc-c3n-t2 s-812c59aua-c3n-t2 ? s-812c59ay-x 6.0 v 2.0 % s-812c60amc-c3o-t2 s-812c60aua-c3o-t2 ? s-812c60ay-x *1 . x changes according to the packing form in to-92. b: bulk, t: tape and reel, z: tape and ammo. remark please contact the sii marketing department fo r products with an output voltage value other than those specified above.
high operating voltage cmos voltage regulator s-812c series rev.2.0 _01 6 seiko instruments inc. 2. 2 s-812cxxb series (short-circui t protection and shutdown function) table 2 output voltage snt-6a(h) sot-23-5 sot-89-5 2.0 v 2.0 % s-812c20bpi-c4atfg s-812c20bmc-c4a-t2 ? 2.1 v 2.0 % s-812c21bpi-c4btfg s-812c21bmc-c4b-t2 ? 2.2 v 2.0 % s-812c22bpi-c4ctfg s-812c22bmc-c4c-t2 ? 2.3 v 2.0 % s-812c23bpi-c4dtfg s-812c23bmc-c4d-t2 ? 2.4 v 2.0 % s-812c24bpi-c4etfg s-812c24bmc-c4e-t2 ? 2.5 v 2.0 % s-812c25bpi-c4ftfg s-812c25bmc-c4f-t2 ? 2.6 v 2.0 % s-812c26bpi-c4gtfg s-812c26bmc-c4g-t2 ? 2.7 v 2.0 % s-812c27bpi-c4htfg s-812c27bmc-c4h-t2 ? 2.8 v 2.0 % s-812c28bpi-c4itfg s-812c28bmc-c4i-t2 ? 2.9 v 2.0 % s-812c29bpi-c4jtfg s-812c29bmc-c4j-t2 ? 3.0 v 2.0 % s-812c30bpi-c4ktfg s-812c30bmc-c4k-t2 ? 3.1 v 2.0 % s-812c31bpi-c4ltfg s-812c31bmc-c4l-t2 ? 3.2 v 2.0 % s-812c32bpi-c4mtfg s-812c32bmc-c4m-t2 ? 3.3 v 2.0 % s-812c33bpi-c4ntfg s-812c33bmc-c4n-t2 s-812c33buc-c4n-t2 3.4 v 2.0 % s-812c34bpi-c4otfg s-812c34bmc-c4o-t2 ? 3.5 v 2.0 % s-812c35bpi-c4ptfg s-812c35bmc-c4p-t2 ? 3.6 v 2.0 % s-812c36bpi-c4qtfg s-812c36bmc-c4q-t2 ? 3.7 v 2.0 % s-812c37bpi-c4rtfg s-812c37bmc-c4r-t2 ? 3.8 v 2.0 % s-812c38bpi-c4stfg s-812c38bmc-c4s-t2 ? 3.9 v 2.0 % s-812c39bpi-c4ttfg s-812c39bmc-c4t-t2 ? 4.0 v 2.0 % s-812c40bpi-c4utfg s-812c40bmc-c4u-t2 ? 4.1 v 2.0 % s-812c41bpi-c4vtfg s-812c41bmc-c4v-t2 ? 4.2 v 2.0 % s-812c42bpi-c4wtfg s-812c42bmc-c4w-t2 ? 4.3 v 2.0 % s-812c43bpi-c4xtfg s-812c43bmc-c4x-t2 ? 4.4 v 2.0 % s-812c44bpi-c4ytfg s-812c44bmc-c4y-t2 ? 4.5 v 2.0 % s-812c45bpi-c4ztfg s-812c45bmc-c4z-t2 ? 4.6 v 2.0 % s-812c46bpi-c5atfg s-812c46bmc-c5a-t2 ? 4.7 v 2.0 % s-812c47bpi-c5btfg s-812c47bmc-c5b-t2 ? 4.8 v 2.0 % s-812c48bpi-c5ctfg s-812c48bmc-c5c-t2 ? 4.9 v 2.0 % s-812c49bpi-c5dtfg s-812c49bmc-c5d-t2 ? 5.0 v 2.0 % s-812c50bpi-c5etfg s-812c50bmc-c5e-t2 s-812c50buc-c5e-t2 5.1 v 2.0 % s-812c51bpi-c5ftfg s-812c51bmc-c5f-t2 ? 5.2 v 2.0 % s-812c52bpi-c5gtfg s-812c52bmc-c5g-t2 ? 5.3 v 2.0 % s-812c53bpi-c5htfg s-812c53bmc-c5h-t2 ? 5.4 v 2.0 % s-812c54bpi-c5itfg s-812c54bmc-c5i-t2 ? 5.5 v 2.0 % s-812c55bpi-c5jtfg s-812c55bmc-c5j-t2 ? 5.6 v 2.0 % s-812c56bpi-c5ktfg s-812c56bmc-c5k-t2 ? 5.7 v 2.0 % s-812c57bpi-c5ltfg s-812c57bmc-c5l-t2 ? 5.8 v 2.0 % s-812c58bpi-c5mtfg s-812c58bmc-c5m-t2 ? 5.9 v 2.0 % s-812c59bpi-c5ntfg s-812c59bmc-c5n-t2 ? 6.0 v 2.0 % s-812c60bpi-c5otfg s-812c60bmc-c5o-t2 ? remark please contact the sii marketing department fo r products with an output voltage value other than those specified above.
high operating voltage cmos voltage regulator rev.2.0 _01 s-812c series seiko instruments inc. 7 ? pin configurations table 3 pin no. symbol pin description 1 nc *1 no connection 2 vin input voltage pin 3 vout output voltage pin 4 vss gnd pin 5 vin input voltage pin 6 on/off shutdown pin snt-6a(h) top view 1 2 3 4 6 5 figure 3 *1. the nc pin is electrically open. the nc pin can be connec ted to vin or vss. table 4 pin no. symbol description 1 vss gnd pin 2 vin input voltage pin 3 vout output voltage pin 4 nc *1 no connection 5 on/off shutdown pin nc *1 no connection sot-23-5 top view 5 4 3 2 1 figure 4 *1 . the nc pin is electrically open. the nc pin can be connected to vin or vss, the shutdown pin becomes n.c. pin, when the shutdown function is removed. table 5 pin no. symbol description 1 vss gnd pin 2 vin input voltage pin 3 vout output voltage pin sot-89-3 top view 3 2 1 figure 5 table 6 pin no. symbol description 1 vout output voltage pin 2 vin input voltage pin 3 vss gnd pin 4 on/off shutdown pin nc *1 no connection 5 nc *1 no connection sot-89-5 top view 1 3 2 4 5 *1 . the nc pin is electrically open. the nc pin can be connected to vin or vss, the shutdown pin becomes n.c. pin, when the shutdown function is removed. figure 6
high operating voltage cmos voltage regulator s-812c series rev.2.0 _01 8 seiko instruments inc. table 7 pin no. symbol description 1 vss gnd pin 2 vin input voltage pin 3 vout output voltage pin to-92 bottom view 1 3 2 figure 7 ? absolute maximum ratings table 8 (ta = 25 c unless otherwise specified) item symbol absolute maximum rating units input voltage v in v ss ? 0.3 to v ss + 18 v v on/off v ss ? 0.3 to v in + 0.3 output voltage v out v ss ? 0.3 to v in + 0.3 power dissipation p d snt-6a(h) 500 *1 mw sot-23-5 250 sot-89-3 500 sot-89-5 500 to-92 400 operating temperature range topr ? 40 to + 85 c storage temperature range tstg ? 40 to + 125 *1. at mounted on printed circuit board [mounted board] (1) board size : 114 mm 76 mm 1.6t mm (2) board name : jedec standard51-7 caution the absolute maximum ratings are rated values exceeding which the product could suffer physical damage. these values must therefore not be exceeded under any conditions. 0 50 100 150 600 400 0 power dissi p ation ( p d ) [ mw ] a mbient tem p erature ( ta ) [ c ] snt-6a ( h ) 200 figure 8 power dissipation of the package (mounting on printed circuit board)
high operating voltage cmos voltage regulator rev.2.0 _01 s-812c series seiko instruments inc. 9 ? electrical characteristics table 9 (ta = 25 c unless otherwise specified) parameter symbol conditions min. typ. max. units test circuits output voltage *1 v out(e) v in =v out(s) +2 v, i out =10ma v out(s) 0.98 v out(s) v out(s) 1.02 v 1 output current *2 i out v out(s) +2v 2.0v v out(s) 2.9v 30 ? ? ma 3 v in 16v 3.0v v out(s) 3.9v 50 ? ? 4.0v v out(s) 4.9v 65 ? ? 5.0v v out(s) 6.0v 75 ? ? dropout voltage *3 v drop i out = 2.0v v out(s) 2.4v ? 0.46 0.95 v 1 10ma 2.5v v out(s) 2.9v ? 0.32 0.68 3.0v v out(s) 3.4v ? 0.23 0.41 3.5v v out(s) 3.9v ? 0.19 0.35 4.0v v out(s) 4.4v ? 0.16 0.30 4.5v v out(s) 4.9v ? 0.14 0.27 5.0v v out(s) 5.4v ? 0.12 0.25 5.5v v out(s) 6.0v ? 0.11 0.23 line regulation 1 ? v out1 1 v out(s) + 1 v v in 16 v, i out = 1ma ? 5 20 mv line regulation 2 ? v out2 1 v out(s) + 1 v v in 16 v, i out = 1 a ? 5 20 load regulation ? v out3 1 v in =v out(s) + 2 v 2.0v v out(s) 2.9v, 1 a i out 20ma ? 6 30 3.0v v out(s) 3.9v, 1 a i out 30ma ? 10 45 4.0v v out(s) 4.9v, 1 a i out 40ma ? 13 65 5.0v v out(s) 6.0v, 1 a i out 50ma ? 17 80 output voltage temperature coefficient *4 ? vout 1 ? ta ? vout v in = v out(s) + 1 v, i out = 10ma, -40 c ta 85 c ? 100 ? ppm / c current consumption i ss v in = 2.0v v out(s) 2.7v ? 0.9 1.6 a 2 v out(s) +2v, 2.8v v out(s) 3.7v ? 1.0 1.8 no load 3.8v v out(s) 5.1v ? 1.2 2.1 5.2v v out(s) 6.0v ? 1.5 2.5 input voltage v in ? ? ? 16 v 1 applied to products with shutdown function current consumption at power-off i ss2 v in = v out(s) + 2v, v on/off = 0v, no load ? 0.1 0.5 a 2 shutdown pin input voltage for high level v sh v in = v out(s) + 2v, r l = 1k ? , judged by v out output level 2.0 ? ? v 4 shutdown pin input voltage for low level v sl v in = v out(s) + 2v, r l = 1k ? , judged by v out output level ? ? 0.4 shutdown pin input current at high level i sh v in =v out(s) + 2v, v on/off = 7v -0.1 ? 0.1 a shutdown pin input current at low level i sl v in =v out(s) + 2v, v on/off = 0v -0.1 ? 0.1 a applied to products with short-circuit protection short-circuit current i os v in = v out(s) + 2 v, v out = 0 v ? 40 ? ma 3
high operating voltage cmos voltage regulator s-812c series rev.2.0 _01 10 seiko instruments inc. *1. v out(s) : specified output voltage v out(e) : effective output voltage i.e., the output voltage when fixing i out ( = 10 ma) and inputting v out(s) + 2.0 v. *2. output current at which output voltage becomes 95 % of v out(e) after gradually increasing output current. *3. v drop = v in1 ? (v out(e) 0.98), where v in1 is the input voltage at which output voltage becomes 98 % of v out(e) after gradually decreasing input voltage. *4. temperature change ratio for 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. temperature change ratio for output voltage *2. specified output voltage *3. output voltage temperature coefficient
high operating voltage cmos voltage regulator rev.2.0 _01 s-812c series seiko instruments inc. 11 ? test circuits 1 . vss vout (on/off) *1 set to power on vin v a figure 9 2. vss vout (on/off) *1 vin a set to v in or gnd figure 10 3. set to power on vss vout (on/off) *1 vin v a figure 11 4. vss vout (on / off) *1 vin v a r l figure 12 *1. in case of product with shutdown function. ? standard circuit vss vout (on/off) *3 vin c in *1 c l *2 input output gnd single gnd * 1. c in is a capacitor for stabilizing the input. * 2. a ceramic capacitor can be used for c l besides a tantalum capacitor. * 3. in case of product with shutdown function. figure 13 caution the above connection diagram and cons tant will not guarantee successful operation. perform through evaluation using the actual application to set the constant.
high operating voltage cmos voltage regulator s-812c series rev.2.0 _01 12 seiko instruments inc. ? technical terms 1. output capacitors (c l ) output capacitors are generally used to stabilize re gulation operation and to improve transient response characteristics. but the s-812c series can provide stable operation without output capacitors. capacitors are used only to improve transient response characteri stics. output capacitors can hence be removed in applications in which transient response can be negligible. when an output capacitor is used, a low esr (equivalent series resistance) capacitor like ceramic capacitor can also be used. 2. output voltage (v out ) the accuracy of the output voltage is 2.0% guaranteed under the specified conditions for input voltage, which differs depending upon the product items, output current, and temperature. caution if the above conditions change, the output voltage value may vary and go out of the accuracy range of the output voltage. see the electrical characteristics and characteristics data for details. 3. line regulations 1 and 2 ( ? v out1 , ? v out2 ) these parameters indicate the input voltage dependence on the output voltage. that is, the values show how much the output voltage changes due to a change in the input voltage with the output current remained unchanged. 4. load regulation ( ? v out3 ) this parameter indicates the output current dependence on the output voltage. that is, the value shows how much the output voltage changes due to a change in the output current with the input voltage remained unchanged. 5. dropout voltage (v drop ) this parameter indicates the difference between the input voltage (v in1 ) and the output voltage when output voltage falls to 98 % of v out(e) by gradually decreasing the input voltage (v in ). v drop = v in1 -[v out(e) 0.98]
high operating voltage cmos voltage regulator rev.2.0 _01 s-812c series seiko instruments inc. 13 6. temperature coefficient of output voltage ? ? ? ? ? ? ? out out v ? ta ? v the output voltage lies in the shaded area in the whole operating temperature shown in figure 14 when the temperature coefficient of the output voltage is 100 ppm/ c. temperature change ratio for output voltage [mv/c] is calculated by 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. temperature change ratio for output voltage *2. specified output voltage *3. output voltage temperature coefficient -40 25 +0.30mv/ c v out[v} v out(e) * 1 85 ta [ c] -0.30mv/ c *1. v out(e) is a measured value of output voltage at 25 c. figure 14 ex. s-812c30a typ.
high operating voltage cmos voltage regulator s-812c series rev.2.0 _01 14 seiko instruments inc. ? description of operation 1. basic operation figure 15 shows the block diagram of the s-812c series . the error amplifier compares a reference voltage (v ref ) with a part of the output voltage divided by the feedback resistors r s and r f , and supplies the gate voltage to the output transistor, necessary to ensure certain output voltage independent from change of input voltage and temperature. reference voltage circuit vout *1 vss vin r s r f error amplifier current sauce v ref ? + *1. parasitic diode figure 15 2. output transistor the s-812c series uses a pch mo s fet as the output transistor. the voltage at v out must not exceed v in +0.3v. when the v out voltage becomes higher than that of v in , reverse current flows and may break the regulator since a parasitic diode between vout and vin pins exists inevitably.
high operating voltage cmos voltage regulator rev.2.0 _01 s-812c series seiko instruments inc. 15 3. shutdown function (on/off pin) the on/off pin controls the start and stop of the regulation operation. when the on/off pin is set to shutdown level, halting whole internal circuit and turning off the pch mos fet between vin and vout pins, current consumption is drastically reduced. the voltage of the vout pin becomes v ss level due to the internal resistance divider of several m ? between vout and vss. the on/off pin should not be left afloat since no pull- up nor pull-down is made internally as shown in figure 16 . note also that a current will flow to the vin side via the parasitic diode inside the ic if a voltage of v in + 0.3 v or more is applied. when the shutdown function is not used, connect the pin to the vin pin in case of positive logic and to the vss pin in case of negative logic. when a regulation operation at light load less than 100 a is halted, output voltage may increase. if the increase of the output voltage should be avoided, pull down the vout pin to the v ss level as soon as on/off pin goes to the shutdown level. table 10 logic type on/off pin internal circuits vout pin voltage current consumption b ?l?: power off stopped v ss level i ss2 b ?h?: power on operating set value i ss1 vin on/off vss figure 16 4. short-circuit protection installation of the short-circuit protection which protects the output transistor against short-circuit between vout and vss can be selected in the s-812c series. the short-circuit protection controls output current as shown in the typical characteristics, (1) output voltage versus output current, and suppresses output current at about 40 ma even if vout and vss pins are short-circuited. the short-circuit protection can not at the same time be a thermal protection. attention should be paid to the input voltage and the load current under the act ual condition so as not to exceed the power dissipation of the package including the case for short-circuit. when the output current is large and the differenc e between input and output voltage is large even if not shorted, the short-circuit protection may work and the output current is suppressed to the specified value. products without short-circuit protection can provid e comparatively large current by removing a short- circuit protection.
high operating voltage cmos voltage regulator s-812c series rev.2.0 _01 16 seiko instruments inc. ? selection of external components 1. output capacitor (c l ) the s-812c series can provide stabl e operation without output capacitor (c l ) since the regulator has an internal phase compensation circuit to stabilize operation when the load changes. the transient response of the regulator, however, changes with the out put capacitor and the magnitude of overshoot and undershoot on output voltage accordingly changes. please refer to c l dependence data in ? ? reference data 1. transient response characteristics? to select suitable value for the capacitor. when a tantalum or an aluminum electrolytic capacitor is used, the esr of the capacitor shall be 10 ? or less. when an aluminum electrolytic capacitor is used attention should be especially paid to since the esr of the aluminum electrolytic capacitor increases at low temperature and possibility of oscillation becomes large. sufficient evaluation including temp erature characteristics is indispensable. ? application circuit 1. output current boosting circuit as shown in figure 17, the output current can be boosted by ex ternally attaching a pnp transistor. the s-812c controls the base current of t he pnp transistor so that the output voltage v out becomes the voltage specified in the s-812c if the sufficient base-emitter voltage v be to turn on the pnp transistor is obtained between input voltage v in and s-812c power source pin vin. as the transient response characteristics of the circuit shown in figure 17 is not enough in some applications, evaluation for output variation due to power-on, power line variation and load variation in actual condition is needed before massproduction. note that the short-circuit protection incorporated in the s-812c series does not work as a short-circuit protection for the boost circuit. r 1 tr1 gnd vout on/off vin vss v in v out c l s-812c series c in figure 17
high operating voltage cmos voltage regulator rev.2.0 _01 s-812c series seiko instruments inc. 17 2. constant current circuit the s-812c series can be served in a cons tant current circuit as shown in the figure 18 and figure 19 . constant current i o is calculated from the following equation: i o = (v out(e) r l ) +i ss , where v out(e) is the effective output voltage. please note that in case of the circuit shown in the figure 18 the magnitude of the constant current i o is limited by the driving ability of the s-812c. the circuit shown in the figure 19 can, however, provide the curren t beyond the driving ability of the s- 812c by combining a constant current circuit with a current boost circuit. the maximum input voltage for the constant current circuit is the sum of the voltage v o of the device and 16 v. it is not recommended to attach a capacitor between the s-812c power sour ce vin and vss pins or between output vout and vss pins because rush current flows at power-on. gnd r l vout vin vin v out v o i o c in on/off vss s-812c series device figure 18 constant current circuit i o on/off r 1 gnd r l vout v in v out c l vss s-812c series tr1 v o device figure 19 constant current boost circuit 3. output voltage adjustment circuit (only for s-812cxxa series (no short-circuit protection and shutdown function)) the output voltage can be increased using the configuration shown in the figure 20 . the output voltage (v out1 ) can be calculated using the following equation; v out1 = v out(e) x (r 1 + r 2 ) r 1 + r 2 x i ss , where v out(e) is the effective output voltage . value of r 1 and r 2 should be determined so as not to be affected by the current consumption i ss . capacitor c 1 has an effect in minimizing output fluctuation due to power-on, power line variation and load variation. determine the optimum value in the actual device. it is not also recommended to attach a capacitor between the s-812 power source v in and vss pins or between output v out and vss pins because output fluctuation or oscillation at powe ring on might occur. gnd v out1 r 2 r 1 vout v in v in c l c 1 c in vss s-812c series figure 20
high operating voltage cmos voltage regulator s-812c series rev.2.0 _01 18 seiko instruments inc. ? precautions ? wiring patterns for the vin, vout and gnd pins sh ould be designed so that the impedance is low. when mounting an output capacitor betwe en the vout and vss pins (c l ) and a capacitor for stabilizing the input between vin and vss pins (c in ), the distance from the capacitors to these pins should be as short as possible. ? note that output voltage may be increased at low load current of less than 1 a. ? at low load current less than 100 a output voltage may increase when the regulating operation is halted by the on/off pin. ? to prevent oscillation, it is recommended to us e the external parts under the following conditions. equivalent series resistance (esr): 10 ? or less input series resistance (r in ): 10 ? or less ? a voltage regulator may oscillate when power source impedance is high and input capacitor is low or not connected. ? pay attention to the operating conditions for input/out put voltage and load current so that the power loss in the ic does not exceed the power dissipation of the package. ? do not apply an electrostatic discharge to this ic that exceeds the performance ratings of the built-in electrostatic protection circuit. ? sii claims no responsibility for any and all disputes aris ing out of or in connection with any infringement of the products including this ic upon patents owned by a third party.
high operating voltage cmos voltage regulator rev.2.0 _01 s-812c series seiko instruments inc. 19 ? typical characteristics 1. output voltage vs output current (when load current increases) 0.0 0.5 1.0 1.5 2.0 2.5 0 50 100 150 i out (ma) v out (v) v in =2.5v 3v 5v 4v 7v s-812c20b (ta=25c) short- circuit protection 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0 50 100 150 200 i out (ma) v out (v) v in =3.5v 4v 6v 5v 8v s-812c30b (ta=25c) short-circuit protection 0.0 1.0 2.0 3.0 4.0 5.0 6.0 0 100 200 300 i out (ma) v out (v) v in =5.5v 6v 8v 7v 10v s-812c50b (ta=25c) short-circuit protection v out (v) no short-circuit protection s-812c20a (ta=25 oc) 0.0 0.5 1.0 1.5 2.0 2.5 0 100 200 300 i out (ma) 7v 5v 4v 3v 2.5v v in =2.3v v out (v) s-812c30a (ta=25oc) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0 100 200 300 400 i out (ma) 8v 6v 5v 4v 3.5v v in =3.3v no short-circuit protection v out (v) s-812c50a (ta=25 oc) 0.0 1.0 2.0 3.0 4.0 5.0 6.0 0 100 200 300 400 i out (ma) 10v 8v 7v 6v 5.5v v in =5.3v no short-circuit protection
high operating voltage cmos voltage regulator s-812c series rev.2.0 _01 20 seiko instruments inc. 2. maximum output current vs input voltage i outmax (ma) 0 20 40 60 80 100 120 140 0481216 v in (v) ta=-40c s-812c20b short-circuit protection 25c 85c i outmax (ma) 0 50 100 150 200 0481216 v in (v) ta=-40c s-812c30b short-circuit protection 25c 85c i outmax (ma) 0 50 100 150 200 250 300 0481216 v in (v) ta=-40c s-812c50b short-circuit protection 25c 85c i outmax (ma) s-812c20a 0 20 40 60 80 100 120 140 0481216 v in ( v ) 85 o c ta=-40 o c 25 o c no short-circuit protection i outmax (ma) s-812c30a 0 50 100 150 200 0481216 v in ( v ) 85oc ta= ? 40oc 25oc no short-circuit protection i outmax (ma) no short-circuit protection s-812c50a 0 50 100 150 200 250 300 0481216 v in (v) 85oc ta=-40 o c 25 o c
high operating voltage cmos voltage regulator rev.2.0 _01 s-812c series seiko instruments inc. 21 3. maximum output current vs. input voltage s-812c20b (ta=25c) 2.10 2.05 2.00 1.95 1.90 1.5 2 2.5 3 3.5 4 v out (v) -50 ma -20 ma -10 ma -1 ma i out =-1 a v in (v) s-812c30b (ta=25c) 3.15 3.10 3.05 2.95 2.85 2.5 33.5 4 4.5 5 v out (v) -50 ma -20 ma -10 ma -1 ma i out =-1 a v in (v) 3.00 2.90 s-812c50b (ta=25c) 5.25 5.15 5.05 4.95 4.5 5 5.5 6 6.5 7 v out (v) -50 ma -20 ma -1 ma i out =-1 a v in (v) 4.85 4.75 -10 ma 4. dropout voltage vs output current 0 500 1000 1500 2000 0 10 20 30 40 50 i out ( ma ) v dro p ( mv ) ta=-40c s-812c20b 25c 85c 0 200 400 600 800 1000 1200 1400 1600 0 10 20 30 40 50 i out ( ma ) v dro p ( mv ) ta=-40c s-812c30b 25c 85c 0 100 200 300 400 500 600 700 800 900 1000 0 10 20 30 40 50 i out ( ma ) v dro p ( mv ) ta=-40c s-812c50b 25c 85c
high operating voltage cmos voltage regulator s-812c series rev.2.0 _01 22 seiko instruments inc. 5. output voltage vs ambient temperature -50 2.02 ta (c) v out (v) 2.04 2.00 1.98 1.96 0 50 100 s-812c20b -50 3.03 ta (c) v out (v) 3.06 3.00 2.97 2.94 050 100 s-812c30b -50 5.05 ta (c) v out (v) 5.10 5.00 4.95 4.90 0 50 100 s-812c50b 6. line regulation 1 vs ambient temperature 7. line regulation 2 vs ambient temperature -50 15 ta (c) ? v out1 (mv) 20 10 5 0 0 50 100 s-812c50b s-812c20b s-812c30b -50 15 ta (c) ? v out2 (mv) 20 10 5 0 050 100 s-812c50b s-812c20b s-812c30b 8. load regulation vs ambient temperature -50 60 ta (c) ? v out3 (mv) 80 40 20 0 0 50 100 s-812c50b s-812c30b s-812c20b
high operating voltage cmos voltage regulator rev.2.0 _01 s-812c series seiko instruments inc. 23 9. current consumption vs input voltage 0.0 0.5 1.0 1.5 2.0 2.5 0481216 v in (v) i ss ( a) s-812c20b 25c 85c ta=-40c 0.0 0.5 1.0 1.5 2.0 2.5 0 4 8 12 16 v in (v) i ss ( a) s-812c30b 25c 85c ta=-40c 0.0 0.5 1.0 1.5 2.0 2.5 0481216 v in (v) i ss ( a) s-812c50b 25c 85c ta=-40c 10. power-off pin input threshold vs input voltage 0.0 0.5 1.0 1.5 2.0 2.5 0 4 8 12 16 v in (v) v sh / v sl (v) ta =? 40c 25c 85c ta =? 40c 25c 85c
high operating voltage cmos voltage regulator s-812c series rev.2.0 _01 24 seiko instruments inc. ? reference data 1. transient response characteristics (typical data: ta = 25 c) overshoot input voltage o utput voltage or load current undershoot 1-1. power-on : s-812c30b (c l =10 f; ceramic capacitor) time ( 100 s/div ) v out (0.5 v/div) 0 v 5 v 0 v 3 v v in , v on/off = 0 5 v, i out = 10 ma, c l = 10 f load dependence of overshoot at power-on c l dependence of overshoot at power-on 0.000 0.005 0.010 0.015 0.020 0.025 0.030 0 0.02 0.04 0.06 0.08 0.1 i out (a) overshoot (v) s-812c50b s-812c30b v in , v on/off = 0 v out(s) + 2 v, c l = 10 f 0.0 0.2 0.4 0.6 0.8 0 10 20 30 40 50 c l ( f ) overshoot (v) s-812c50b v in , v on/off = 0 v out(s) + 2 v, i out = 10 ma s-812c30b v dd dependence of overshoot at power-on ?t a? dependence of overshoot at power-on 0.000 0.005 0.010 0.015 0.020 0.025 0.030 0.035 0 5 10 15 20 v dd (v) overshoot (v) s-812c50b v in , v on/off = 0 v dd , i out = 10 ma, c l = 10 f s-812c30b 0.00 0.01 0.02 0.03 0.04 0.05 0.06 ? 50 0 50 100 ta (c) overshoot (v) s-812c50b v in , v on/off = 0 v out(s) + 2 v, i out = 10 ma, c l = 10 f s-812c30b
high operating voltage cmos voltage regulator rev.2.0 _01 s-812c series seiko instruments inc. 25 1-2. power-on by shutdown pin : s-812c30a (c l =10 f; ceramic capacitor) time ( 200 s/div ) v out (0.5 v/div) 5 v 0 v 0 v 3 v v in = 5 v, v on/off = 0 5 v, i out = 10 ma, c l = 10 f load dependence of overshoot at power-on by shutdown pin c l dependence of overshoot at power-on by shutdown pin 0.0 0.2 0.4 0.6 0.8 0.001 0.01 0.1 1 10 100 i out (ma) overshoot (v) s-812c50b v in = v out(s) + 2 v, v on/off = 0 v out(s) + 2 v, c l = 10 f s-812c30b 0.0 0.2 0.4 0.6 0.8 0 10 20 30 40 50 c l ( f ) overshoot (v) s-812c50b v in = v out(s) + 2 v, v on/off = 0 v out(s) + 2 v, i out = 10 ma s-812c30b v dd dependence of overshoot at power-on by shutdown pin ?ta? dependence of overshoot at power-on by shutdown pin 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0 5 10 15 20 v dd (v) overshoot (v) s-812c50b v in = v dd , v on/off = 0 v dd , i out = 10 ma, c l = 10 f s-812c30b 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 ? 50 0 50 100 ta (c) overshoot (v) s-812c50b v in = v out(s) + 2 v, v on/off = 0 v out(s) + 2 v, i out = 10 ma, c l = 10 f s-812c30b
high operating voltage cmos voltage regulator s-812c series rev.2.0 _01 26 seiko instruments inc. 1-3. line transient response : s-812c30b (c l =10 f; ceramic capacitor) v in , v on/off = 4 8 v , i out = 10 m a time ( 100 s/div ) v out (0.05v / div) 10 v 0 v 5 v 3 v 2.9 v load dependence of overshoot at line transient c l dependence of overshoot at line transient 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0 10 20 30 40 50 i out (ma) overshoot (v) s-812c50b v in , v on/off = v out(s) + 1 v v out(s) + 5 v, c l = 10 f s-812c30b 0.00 0.05 0.10 0.15 0.20 0.25 0 10 20 30 40 50 c l ( f ) overshoot (v) s-812c50b v in , v on/off = v out(s) + 1 v v out(s) + 5 v, i out = 10 m a s-812c30b v dd dependence of overshoot at line transient t emperature dependence of overshoot at line transient 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0 5 10 15 20 v dd (v) overshoot (v) s-812c50b v in , v on/off = v out(s) + 1 v v dd , i out = 10 ma, c l = 10 f s-812c30b 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 ? 50 0 50 100 ta (c) overshoot (v) s-812c50b v in , v on/off = v out(s) + 1 v v out(s) + 5 v, i out = 10 ma, c l = 10 f s-812c30b
high operating voltage cmos voltage regulator rev.2.0 _01 s-812c series seiko instruments inc. 27 time ( 500 s/div ) v out (0.05 v / div) 10 v 0 v 5 v 3 v 2.8 v 2.9 v v in , v on/off = 8 4 v, i out = 10 m a load dependence of undershoot at line transient c l dependencies of undershoot at line transient 0.0 0.2 0.4 0.6 0.8 0 10 20 30 40 50 i out (ma) undershoot (v) s-812c50b v in , v on/off = v out(s) + 5 v v out(s) + 1 v, c l = 10 f s-812c30b 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0 10 20 30 40 50 c l ( f ) undershoot (v) s-812c50b v in , v on/off = v out(s) + 5 v v out(s) + 1 v, i out = 10 ma s-812c30b v dd dependence of undershoot at line transient temperature dependence of undershoot at line transient 0.00 0.05 0.10 0.15 0.20 0.25 0 5 10 15 20 v dd (v) undershoot (v) s-812c50b v in , v on/off = v dd v out(s) + 1 v, i out = 10ma, c l = 10 f s-812c30b 0.00 0.05 0.10 0.15 0.20 0.25 0.30 ? 50 0 50 100 ta (c) undershoot (v) s-812c50b s-812c30b v in , v on/off = v out(s) + 5 v v out(s) + 1 v, i out = 10ma, c l = 10 f
high operating voltage cmos voltage regulator s-812c series rev.2.0 _01 28 seiko instruments inc. 1-4. load transient response : s-812c30b (c l =10 f; ceramic capacitor) v in = 5 v , i out = 10 ma 1 a , c l = 10 f time ( 200 s / div ) v out (0.05 v / div) 2.9 v 3.1 v 3 v 0 ma 10 ma load dependence of overshoot at load transient c l dependence of overshoot at load transient 0.0 0.2 0.4 0.6 0.8 1.0 1.2 0 20 40 60 80 100 i out (ma) overshoot (v) s-812c50b v in , v on/off = v out(s) + 2 v, i out = 10 ma 1 a s-812c30b 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0 10 20 30 40 50 c l ( f ) overshoot (v) s-812c50b v in , v on/off = v out(s) + 2 v, i out = 10 ma 1 a s-812c30b v dd dependence of overshoot at load transient temperature dependence of overshoot at load transient 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0 5 10 15 20 v dd (v) overshoot (v) s-812c50b i out = 10 ma 1 a, c l = 10 f s-812c30b 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 ? 50 0 50 100 ta (c) overshoot (v) s-812c50b v in , v on/off =v out(s) + 2 v, i out = 10 ma 1 a, c l = 10 f s-812c30b
high operating voltage cmos voltage regulator rev.2.0 _01 s-812c series seiko instruments inc. 29 time ( 500 s / div ) v out (0.05 v / div) 2.9 v 3 v v in = 5 v, i out = 1 a, 10 ma, c l = 10 f 0 ma 10 ma load dependence of undershoot at load transient c l dependence of undershoot at load transient 0.0 0.2 0.4 0.6 0.8 1.0 1.2 0 20 40 60 80 100 i out (ma) undershoot (v) s-812c50b v in , v on/off = v out(s) + 2 v, i out = 1 a i out , c l = 10 f s-812c30b 0.00 0.05 0.10 0.15 0.20 0.25 0 10 20 30 40 50 c l ( f ) undershoot (v) s-812c50b v in , v on/off = v out(s) + 2 v, i out = 1 a 10 ma s-812c30b v dd dependence of undershoot at load transient temperature dependence of undershoot at load transient 0.00 0.05 0.10 0.15 0.20 0 5 10 15 20 v dd (v) undershoot (v) s-812c50b i out = 1 a 10 ma, c l = 10 f s-812c30b 0.00 0.05 0.10 0.15 0.20 0.25 ? 50 0 50 100 ta (c) undershoot (v) s-812c50b v in , v on/off = v out(s) + 2 v, i out = 1 a 10 ma, c l = 10 f s-812c30b

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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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