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rev.3.0 _00 super-small package cmos voltage regulator s-817 series seiko instruments inc. 1 the s-817 series is a 3-terminal positive voltage regulator, developed using cmos technology. small ceramic capacitors can be used as the output capacitor, and the s-817 series provides stable operation with low loads down to 1 a. compared with the conventional voltage regulator, it is of low current consumption, and with a lineup of the super small package (snt-4a:1.2 x 1.6mm). it is optimal as a power supply of small portable device. ? features ? ultra-low current consumption: operating current: typ. 1.2 a, max. 2.5 a ? output voltage: 1.1 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. 160 mv (v out = 5.0 v, i out = 10 ma) ? low esr capacitor (e.g. a ceramic capacitor of 0.1 f or more) can be used as an output capacitor. ? short circuit protection for: series a ? excellent line regulation: stabl e operation at light load of 1 a *1. attention should be paid to the power dissi pation of the package when the load is large. ? applications ? power source for battery-powered devices ? power source for personal communication devices ? power source for home elec tric/electronic appliances ? packages package name drawing code package tape reel zigzag snt-4a pf004-a pf004-a pf004-a ? sc-82ab np004-a np004-a np004-a ? sot-23-5 mp005-a mp005-a mp005-a ? sot-89-3 up003-a up003-a up003-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
super-small package cmos voltage regulator s-817 series rev.3.0 _00 seiko instruments inc. 2 ? block diagrams 1. s-817a series *1 vin vss vout short circuit protection reference voltage circuit + ? *1. parasitic diode figure 1 2. s-817b series *1 vin vss vout reference voltage circuit + ? *1. parasitic diode figure 2
super-small package cmos voltage regulator rev.3.0 _00 s-817 series seiko instruments inc. 3 ? product name structure ? the product types and output voltage for the s-817 seri es can be selected at the user?s request. refer to the ?product name? for the meanings of the characte rs in the product name and ?product name list? for the full product names 1. product name 1. 1 s-817a series 1. 1. 1 snt-4a package s-817 a xx a pf - xxx tf g fixed ic direction in tape specifications *1 product name (abbreviation) package name (abbreviation) *2 pf : snt-4a output voltage 11 to 60 (e.g. when the output voltage is 1.5 v, it is expressed 15) short circuit protection a : yes *1. refer to the specifications at the end of this book. *2. refer to the ? 2. product name list ?. 1. 1. 2 sc-82ab and sot-23-5 package s-817 a xx a xx - xxx t2 ic direction in tape specifications *1 product name (abbreviation) package name (abbreviation) *2 nb : sc-82ab mc : sot-23-5 output voltage 11 to 60 (e.g. when the output voltage is 1.5 v, it is expressed 15) short circuit protection a : yes *1. refer to the specifications at the end of this book. *2. refer to the ? 2. product name list ?.
super-small package cmos voltage regulator s-817 series rev.3.0 _00 seiko instruments inc. 4 1. 2 s-817b series 1. 2. 1 sot-23-5 and sot-89-3 package s-817 b 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 output voltage 11 to 60 (e.g. when the output voltage is 1.5 v, it is expressed 15) short circuit protection b : no *1. refer to the specifications at the end of this book. *2. refer to the ? 2. product name list ?. 1. 2. 2 to-92 package s-817 b xx a y - x packing form b : bulk t : tape and reel z : tape and ammo package name (abbreviation) *1 y : to-92 output voltage 11 to 60 (e.g. when the output voltage is 1.5 v, it is expressed 15) short circuit protection b : no *1. refer to the ? 2. product name list ?.
super-small package cmos voltage regulator rev.3.0 _00 s-817 series seiko instruments inc. 5 2. product name list 2. 1 s-817a series table 1 output voltage snt-4a sc-82ab sot-23-5 1.1 v 2.0 % s-817a11apf-cuatfg s-817a11anb-cua-t2 ? 1.2 v 2.0 % s-817a12apf-cubtfg s-817a12anb-cub-t2 ? 1.3 v 2.0 % s-817a13apf-cuctfg s-817a13anb-cuc-t2 ? 1.4 v 2.0 % s-817a14apf-cudtfg s-817a14anb-cud-t2 s-817a14amc-t2 1.5 v 2.0 % s-817a15apf-cuetfg s-817a15anb-cue-t2 ? 1.6 v 2.0 % s-817a16apf-cuftfg s-817a16anb-cuf-t2 s-817a16amc-t2 1.7 v 2.0 % s-817a17apf-cugtfg s-817a17anb-cug-t2 ? 1.8 v 2.0 % s-817a18apf-cuhtfg s-817a18anb-cuh-t2 ? 1.9 v 2.0 % s-817a19apf-cuitfg s-817a19anb-cui-t2 ? 2.0 v 2.0 % s-817a20apf-cujtfg s-817a20anb-cuj-t2 ? 2.1 v 2.0 % s-817a21apf-cuktfg s-817a21anb-cuk-t2 ? 2.2 v 2.0 % s-817a22apf-cultfg s-817a22anb-cul-t2 ? 2.3 v 2.0 % s-817a23apf-cumtfg s-817a23anb-cum-t2 ? 2.4 v 2.0 % s-817a24apf-cuntfg s-817a24anb-cun-t2 ? 2.5 v 2.0 % s-817a25apf-cuotfg s-817a25anb-cuo-t2 ? 2.6 v 2.0 % s-817a26apf-cuptfg s-817a26anb-cup-t2 ? 2.7 v 2.0 % s-817a27apf-cuqtfg s-817a27anb-cuq-t2 ? 2.8 v 2.0 % s-817a28apf-curtfg s-817a28anb-cur-t2 ? 2.9 v 2.0 % s-817a29apf-custfg s-817a29anb-cus-t2 ? 3.0 v 2.0 % s-817a30apf-cuttfg s-817a30anb-cut-t2 ? 3.1 v 2.0 % s-817a31apf-cuutfg s-817a31anb-cuu-t2 ? 3.2 v 2.0 % s-817a32apf-cuvtfg s-817a32anb-cuv-t2 ? 3.3 v 2.0 % s-817a33apf-cuwtfg s-817a33anb-cuw-t2 ? 3.4 v 2.0 % s-817a34apf-cuxtfg s-817a34anb-cux-t2 ? 3.5 v 2.0 % s-817a35apf-cuytfg s-817a35anb-cuy-t2 ? 3.6 v 2.0 % s-817a36apf-cuztfg s-817a36anb-cuz-t2 ? 3.7 v 2.0 % s-817a37apf-cvatfg s-817a37anb-cva-t2 ? 3.8 v 2.0 % s-817a38apf-cvbtfg s-817a38anb-cvb-t2 ? 3.9 v 2.0 % s-817a39apf-cvctfg s-817a39anb-cvc-t2 ? 4.0 v 2.0 % s-817a40apf-cvdtfg s-817a40anb-cvd-t2 ? 4.1 v 2.0 % s-817a41apf-cvetfg s-817a41anb-cve-t2 ? 4.2 v 2.0 % s-817a42apf-cvftfg s-817a42anb-cvf-t2 ? 4.3 v 2.0 % s-817a43apf-cvgtfg s-817a43anb-cvg-t2 ? 4.4 v 2.0 % s-817a44apf-cvhtfg s-817a44anb-cvh-t2 ? 4.5 v 2.0 % s-817a45apf-cvitfg s-817a45anb-cvi-t2 ? 4.6 v 2.0 % s-817a46apf-cvjtfg s-817a46anb-cvj-t2 ? 4.7 v 2.0 % s-817a47apf-cvktfg s-817a47anb-cvk-t2 ? 4.8 v 2.0 % s-817a48apf-cvltfg s-817a48anb-cvl-t2 ? 4.9 v 2.0 % s-817a49apf-cvmtfg s-817a49anb-cvm-t2 ? 5.0 v 2.0 % s-817a50apf-cvntfg s-817a50anb-cvn-t2 ? 5.1 v 2.0 % s-817a51apf-cvotfg s-817a51anb-cvo-t2 ? 5.2 v 2.0 % s-817a52apf-cvptfg s-817a52anb-cvp-t2 ? 5.3 v 2.0 % s-817a53apf-cvqtfg s-817a53anb-cvq-t2 ? 5.4 v 2.0 % s-817a54apf-cvrtfg s-817a54anb-cvr-t2 ? 5.5 v 2.0 % s-817a55apf-cvstfg s-817a55anb-cvs-t2 ? 5.6 v 2.0 % s-817a56apf-cvttfg s-817a56anb-cvt-t2 ? 5.7 v 2.0 % s-817a57apf-cvutfg s-817a57anb-cvu-t2 ? 5.8 v 2.0 % s-817a58apf-cvvtfg s-817a58anb-cvv-t2 ? 5.9 v 2.0 % s-817a59apf-cvwtfg s-817a59anb-cvw-t2 ? 6.0 v 2.0 % s-817a60apf-cvxtfg s-817a60anb-cvx-t2 ? remark please contact the sii marketing department for products with an output voltage over than those specified above.
super-small package cmos voltage regulator s-817 series rev.3.0 _00 seiko instruments inc. 6 2. 2 s-817b series table 2 output voltage sot-23-5 sot-89-3 to-92 *1 1.1 v 2.0 % s-817b11amc-cwa-t2 s-817b11aua-cwa-t2 s-817b11ay-x 1.2 v 2.0 % s-817b12amc-cwb-t2 s-817b12aua-cwb-t2 s-817b12ay-x 1.3 v 2.0 % s-817b13amc-cwc-t2 s-817b13aua-cwc-t2 s-817b13ay-x 1.4 v 2.0 % s-817b14amc-cwd-t2 s-817b14aua-cwd-t2 s-817b14ay-x 1.5 v 2.0 % s-817b15amc-cwe-t2 s-817b15aua-cwe-t2 s-817b15ay-x 1.6 v 2.0 % s-817b16amc-cwf-t2 s-817b16aua-cwf-t2 s-817b16ay-x 1.7 v 2.0 % s-817b17amc-cwg-t2 s-817b17aua-cwg-t2 s-817b17ay-x 1.8 v 2.0 % s-817b18amc-cwh-t2 s-817b18aua-cwh-t2 s-817b18ay-x 1.9 v 2.0 % s-817b19amc-cwi-t2 s-817b19aua-cwi-t2 s-817b19ay-x 2.0 v 2.0 % s-817b20amc-cwj-t2 s-817b20aua-cwj-t2 s-817b20ay-x 2.1 v 2.0 % s-817b21amc-cwk-t2 s-817b21aua-cwk-t2 s-817b21ay-x 2.2 v 2.0 % s-817b22amc-cwl-t2 s-817b22aua-cwl-t2 s-817b22ay-x 2.3 v 2.0 % s-817b23amc-cwm-t2 s-817b23aua-cwm-t2 s-817b23ay-x 2.4 v 2.0 % s-817b24amc-cwn-t2 s-817b24aua-cwn-t2 s-817b24ay-x 2.5 v 2.0 % s-817b25amc-cwo-t2 s-817b25aua-cwo-t2 s-817b25ay-x 2.6 v 2.0 % s-817b26amc-cwp-t2 s-817b26aua-cwp-t2 s-817b26ay-x 2.7 v 2.0 % s-817b27amc-cwq-t2 s-817b27aua-cwq-t2 s-817b27ay-x 2.8 v 2.0 % s-817b28amc-cwr-t2 s-817b28aUA-CWR-T2 s-817b28ay-x 2.9 v 2.0 % s-817b29amc-cws-t2 s-817b29aua-cws-t2 s-817b29ay-x 3.0 v 2.0 % s-817b30amc-cwt-t2 s-817b30aua-cwt-t2 s-817b30ay-x 3.1 v 2.0 % s-817b31amc-cwu-t2 s-817b31aua-cwu-t2 s-817b31ay-x 3.2 v 2.0 % s-817b32amc-cwv-t2 s-817b32aua-cwv-t2 s-817b32ay-x 3.3 v 2.0 % s-817b33amc-cww-t2 s-817b33aua-cww-t2 s-817b33ay-x 3.4 v 2.0 % s-817b34amc-cwx-t2 s-817b34aua-cwx-t2 s-817b34ay-x 3.5 v 2.0 % s-817b35amc-cwy-t2 s-817b35aua-cwy-t2 s-817b35ay-x 3.6 v 2.0 % s-817b36amc-cwz-t2 s-817b36aua-cwz-t2 s-817b36ay-x 3.7 v 2.0 % s-817b37amc-cxa-t2 s-817b37aua-cxa-t2 s-817b37ay-x 3.8 v 2.0 % s-817b38amc-cxb-t2 s-817b38aua-cxb-t2 s-817b38ay-x 3.9 v 2.0 % s-817b39amc-cxc-t2 s-817b39aua-cxc-t2 s-817b39ay-x 4.0 v 2.0 % s-817b40amc-cxd-t2 s-817b40aua-cxd-t2 s-817b40ay-x 4.1 v 2.0 % s-817b41amc-cxe-t2 s-817b41aua-cxe-t2 s-817b41ay-x 4.2 v 2.0 % s-817b42amc-cxf-t2 s-817b42aua-cxf-t2 s-817b42ay-x 4.3 v 2.0 % s-817b43amc-cxg-t2 s-817b43aua-cxg-t2 s-817b43ay-x 4.4 v 2.0 % s-817b44amc-cxh-t2 s-817b44aua-cxh-t2 s-817b44ay-x 4.5 v 2.0 % s-817b45amc-cxi-t2 s-817b45aua-cxi-t2 s-817b45ay-x 4.6 v 2.0 % s-817b46amc-cxj-t2 s-817b46aua-cxj-t2 s-817b46ay-x 4.7 v 2.0 % s-817b47amc-cxk-t2 s-817b47aua-cxk-t2 s-817b47ay-x 4.8 v 2.0 % s-817b48amc-cxl-t2 s-817b48aua-cxl-t2 s-817b48ay-x 4.9 v 2.0 % s-817b49amc-cxm-t2 s-817b49aua-cxm-t2 s-817b49ay-x 5.0 v 2.0 % s-817b50amc-cxn-t2 s-817b50aua-cxn-t2 s-817b50ay-x 5.1 v 2.0 % s-817b51amc-cxo-t2 s-817b51aua-cxo-t2 s-817b51ay-x 5.2 v 2.0 % s-817b52amc-cxp-t2 s-817b52aua-cxp-t2 s-817b52ay-x 5.3 v 2.0 % s-817b53amc-cxq-t2 s-817b53aua-cxq-t2 s-817b53ay-x 5.4 v 2.0 % s-817b54amc-cxr-t2 s-817b54aua-cxr-t2 s-817b54ay-x 5.5 v 2.0 % s-817b55amc-cxs-t2 s-817b55aua-cxs-t2 s-817b55ay-x 5.6 v 2.0 % s-817b56amc-cxt-t2 s-817b56aua-cxt-t2 s-817b56ay-x 5.7 v 2.0 % s-817b57amc-cxu-t2 s-817b57aua-cxu-t2 s-817b57ay-x 5.8 v 2.0 % s-817b58amc-cxv-t2 s-817b58aua-cxv-t2 s-817b58ay-x 5.9 v 2.0 % s-817b59amc-cxw-t2 s-817b59aua-cxw-t2 s-817b59ay-x 6.0 v 2.0 % s-817b60amc-cxx-t2 s-817b60aua-cxx-t2 s-817b60ay-x *1 . x changes according to the packing form in to-92. b: bulk, t: tape and reel, z: tape and ammo.
super-small package cmos voltage regulator rev.3.0 _00 s-817 series seiko instruments inc. 7 ? pin configurations table 3 pin no. symbol description 1 vout output voltage pin 2 vin input voltage pin 3 vss gnd pin 4 nc *1 no connection snt-4a top view 1 4 2 3 * 1 . the nc pin is electrically open. the nc pin can be connected to vin or vss. figure 3 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 4 3 1 2 sc-82ab top view * 1 . the nc pin is electrically open. the nc pin can be connected to vin or vss. figure 4 table 5 pin no. symbol description 1 vss gnd pin 2 vin input voltage pin 3 vout output voltage pin 4 nc *1 no connection 5 nc *1 no connection sot-23-5 top view 5 4 3 2 1 * 1 . the nc pin is electrically open. the nc pin can be connected to vin or vss. figure 5 table 6 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 6
super-small package cmos voltage regulator s-817 series rev.3.0 _00 seiko instruments inc. 8 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 + 12 v output voltage v out v ss ? 0.3 to v in + 0.3 v power dissipation p d snt-4a 300 *1 mw sc-82ab 150 sot-23-5 250 sot-89-3 500 to-92 400 operating temperature range topr ? 40 to + 85 c storage temperature tstg ? 40 to + 125 c *1 . at mounted on jedec high heat dissipation printed circuit board 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.
super-small package cmos voltage regulator rev.3.0 _00 s-817 series seiko instruments inc. 9 ? electrical characteristics 1. s-817a series table 9 (ta = 25 c unless otherwise specified) item symbol conditions min. typ. max. units measur- ement circuits output voltage *1 v out(e) v in = v out(s) + 2 v, i out = 10 ma v out(s) 0.98 v out(s) v out(s) 1.02 v 1 output current *2 i out v out(s) + 2 v 1.1 v v out(s) 1.9 v 20 ? ? ma 3 v in 10 v 2.0 v v out(s) 2.9 v 35 ? ? 3.0 v v out(s) 3.9 v 50 ? ? 4.0 v v out(s) 4.9 v 65 ? ? 5.0 v v out(s) 6.0 v 75 ? ? dropout voltage *3 v drop i out = 10 ma 1.1 v v out(s) 1.4 v ? 0.92 1.58 v 1 1.5 v v out(s) 1.9 v ? 0.58 0.99 2.0 v v out(s) 2.4 v ? 0.40 0.67 2.5 v v out(s) 2.9 v ? 0.31 0.51 3.0 v v out(s) 3.4 v ? 0.25 0.41 3.5 v v out(s) 3.9 v ? 0.22 0.35 4.0 v v out(s) 4.4 v ? 0.19 0.30 4.5 v v out(s) 4.9 v ? 0.18 0.27 5.0 v v out(s) 5.4 v ? 0.16 0.25 5.5 v v out(s) 6.0 v ? 0.15 0.23 line regulation 1 ? v out1 v out(s) + 1 v v in 10 v, i out = 1 ma ? 5 20 mv line regulation 2 ? v out2 v out(s) + 1 v v in 10 v, i out = 1 a ? 5 20 load regulation ? v out3 v in = v out(s) + 2 v 1.1 v v out(s) 1.9 v, 1 a i out 10 ma ? 5 20 2.0 v v out(s) 2.9 v, 1 a i out 20 ma ? 10 30 3.0 v v out(s) 3.9 v, 1 a i out 30 ma ? 20 45 4.0 v v out(s) 4.9 v, 1 a i out 40 ma ? 25 65 5.0 v v out(s) 6.0 v, 1 a i out 50 ma ? 35 80 output voltage temperature coefficient *4 out out v ta v ? ? ? v in = v out(s) + 1 v, i out = 10 ma, ? 40 c ta 85 c ? 100 ? ppm / c current consumption i ss v in = v out(s) + 2 v, no load ? 1.2 2.5 a 2 input voltage v in ? ? ? 10 v 1 short current limit i os v in = v out(s) + 2 v, v out pin = 0 v ? 40 ? ma 3 *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 of the output voltage *2. specified output voltage *3. output voltage temperature coefficient
super-small package cmos voltage regulator s-817 series rev.3.0 _00 seiko instruments inc. 10 2. s-817b series table 10 (ta = 25 c unless otherwise specified) item symbol conditions min. typ. max. units measur- ement circuits output voltage *1 v out(e) v in = v out(s) + 2 v, i out = 10 ma v out(s) 0.98 v out(s) v out(s) 1.02 v 1 output current *2 i out v out(s) + 2 v 1.1 v v out(s) 1.9 v 20 ? ? ma 3 v in 10 v 2.0 v v out(s) 2.9 v 35 ? ? 3.0 v v out(s) 3.9 v 50 ? ? 4.0 v v out(s) 4.9 v 65 ? ? 5.0 v v out(s) 6.0 v 75 ? ? dropout voltage *3 v drop i out = 10 ma 1.1 v v out(s) 1.4 v ? 0.92 1.58 v 1 1.5 v v out(s) 1.9 v ? 0.58 0.99 2.0 v v out(s) 2.4 v ? 0.40 0.67 2.5 v v out(s) 2.9 v ? 0.31 0.51 3.0 v v out(s) 3.4 v ? 0.25 0.41 3.5 v v out(s) 3.9 v ? 0.22 0.35 4.0 v v out(s) 4.4 v ? 0.19 0.30 4.5 v v out(s) 4.9 v ? 0.18 0.27 5.0 v v out(s) 5.4 v ? 0.16 0.25 5.5 v v out(s) 6.0 v ? 0.15 0.23 line regulation 1 ? v out1 v out(s) + 1 v v in 10 v, i out = 1 ma ? 5 20 mv line regulation 2 ? v out2 v out(s) + 1 v v in 10 v, i out = 1 a ? 5 20 load regulation ? v out3 v in = v out(s) + 2 v 1.1 v v out(s) 1.9 v, 1 a i out 10 ma ? 5 20 2.0 v v out(s) 2.9 v, 1 a i out 20 ma ? 10 30 3.0 v v out(s) 3.9 v, 1 a i out 30 ma ? 20 45 4.0 v v out(s) 4.9 v, 1 a i out 40 ma ? 25 65 5.0 v v out(s) 6.0 v, 1 a i out 50 ma ? 35 80 output voltage temperature coefficient *4 out out v ta v ? ? ? v in = v out(s) + 1 v, i out = 10 ma, ? 40 c ta 85 c ? 100 ? ppm / c current consumption i ss v in = v out(s) + 2 v, no load ? 1.2 2.5 a 2 input voltage v in ? ? ? 10 v 1 *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 of the output voltage *2. specified output voltage *3. output voltage temperature coefficient
super-small package cmos voltage regulator rev.3.0 _00 s-817 series seiko instruments inc. 11 ? measurement circuits 1 . vss vout vin v a + + figure 8 2. vss vout vin a figure 9 3. vss vout vin v a + + figure 10 ? standard circuit vss vout vin c in *1 c l *2 input output gnd single gnd * 1. c in is a capacitor used to stabilize input. * 2. a ceramic capacitor of 0.1 f or more can be used for c l . figure 11 caution the above connection diagram and cons tant will not guarantee su ccessful operation. perform through evaluation using the actual application to set the constant.
super-small package cmos voltage regulator s-817 series rev.3.0 _00 seiko instruments inc. 12 ? explanation of terms 1. low esr esr is the abbreviation for equivalent series resistance. low esr output capacitors (c l ) can be used in the s-817 series. 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 ) indicate the input voltage dependencies of 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 ) indicates the output current dependencies of output voltage. that is, the values show 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 ) indicates a difference between input voltage (v in1 ) and output voltage when output voltage falls by 98% of v out(e) by gradually decreasing the input voltage (v in ). v drop = v in1 ? [v out(e) 0.98]
super-small package cmos voltage regulator rev.3.0 _00 s-817 series seiko instruments inc. 13 6. temperature coefficient of output voltage ? ? ? ? ? ? ? out out v ? ta ? v the shadowed area in figure 12 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. s-817a15 typ. ? 40 25 + 0.15 mv / c v out [v] *1. v out(e) is the value of the output voltage measured at 25 c. 85 ta [ c] ? 0.15 mv / c figure 12 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 cmos voltage regulator s-817 series rev.3.0 _00 seiko instruments inc. 14 ? operation 1. basic operation figure 13 shows the block diagram of the s-817 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 fl uctuations of input voltage and temperature. reference voltage circuit vout *1 vss vin r s r f error amplifier current supply v ref ? + v fb *1. parasitic diode figure 13 2. output transistor the s-817 series uses a 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 vout pin through a parastic diode to vin pin. 3. short circuit protection the s-817a series incorporates a short circuit prot ection to protect the output transistor against short circuit between vout pin and vss pin. installation of the short-circuit protec tion which protects the output transistor against short-circuit between vout and vss can be selected in the s-817a 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 be a thermal protec tion at the same time. attention should be paid to the input voltage and the load current under the ac tual condition so as not to exceed the power dissipation of the package includ ing the case for short-circuit. when the output current is large and the difference 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. in addition, s-817b series is removing a short-circuit protection, and is the product which enabled it to pass large current.
super-small package cmos voltage regulator rev.3.0 _00 s-817 series seiko instruments inc. 15 ? selection of output capacitor (c l ) to stabilize operation against variation in output load, a capacitor (c l ) must be mounted between vout and vss in the s-817 series because the phase is com pensated with the help of the internal phase compensation circuit and the esr of the output capacitor. when selecting a ceramic or an os capacitor, capacitance should be 0.1 f or more, and when selecting a tantalum or an aluminum electrolytic capacitor, capacitance should be 0.1 f or more and esr 30 ? or less. when an aluminum electrolytic capacitor is used attent ion should be especially paid to since the esr of the aluminum electrolytic capacitor incr eases at low temperature and possibilit y of oscillation becomes large. sufficient evaluation including temperature characterist ics is indispensable. overshoot and undershoot characteristics differ depending upon the type of the output capacitor. refer to c l dependencies in ? ? reference data 1. transient response characteristics ?. ? application circuits 1. output current boosting circuit r 2 r 1 tr1 gnd vout vin vss v in v out c l s-817 series c in figure 14 as shown in figure 14 , the output current can be boosted by exte rnally attaching a pnp transistor. the base current of the pnp transistor is controlled so that output voltage (v out ) goes the voltage specified in the s-817 series when base-emitter voltage (v be ) necessary to turn on the pnp transistor is obtained between input voltage (v in ) and s-817 series power source pin (vin). the following are tips and hints for selecting and ensuring optimum use of external parts ? pnp transistor (tr1): 1. set h fe to approx. 100 to 400. 2. confirm that no problem occurs due to power di ssipation under normal operation conditions. ? resistor (r 1 ): generally set r 1 to 1 k ? v out (s) (the voltage specified in the s-817 series) or more. ? output capacitor (c l ): output capacitor (c l ) is effective in minimizing output fluctuation at powering on or due to power or load fluctuation, but oscillation might occur. always connect resistor r2 in series to output capacitor c l . ? resistor (r 2 ): set r 2 to 2 ? v out(s) or more. ? do not attach a capacitor between the s-817 series power source (v in ) and gnd pins or between base and emitter of the pnp transistor to avoid oscillation. ? to improve transient response characteristics of the output current boosting circuit shown in figure 14 , check that no problem occurs due to output fluctuation at powering on or due to power or load fluctuation under normal operating conditions. ? pay attention to the short current limit circuit incorporated into the s-817 series because it does not function as a shortcircuiting protection circuit for this boosting circuit.
super-small package cmos voltage regulator s-817 series rev.3.0 _00 seiko instruments inc. 16 the following graphs show the examples of input-output voltage characteristics (ta = 25 c, typ.) in the output current boosting circuit: 1. 1 s-817a11anb/s-817b11amc 1. 2 s-817a50anb/s-817b50amc tr1 : 2sa1213y, r 1 : 1 k ? , c l : 10 f, r 2 : 2 ? tr1 : 2sa1213y, r 1 : 200 ? , c l : 10 f, r 2 : 10 ? 0.60 0.70 0.80 0.90 1.00 1.10 1.20 1.4 1.5 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 v in (v) v out (v) 800 ma 600 ma 400 ma 200 ma 10 ma 50 ma 100 ma 1 ma 4.60 4.70 4.80 4.90 5.00 5.10 5.20 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 v in (v) v out (v) 100 ma 50 ma 10 ma 5 ma 800 ma 600 ma 400 ma 200 ma 2. constant current circuit 2. 1 constant current circuit gnd r l vout vin v in v0 v o i o c in vss s-817 series device figure 15 2. 2 constant current boosting circuit i o r 1 gnd r l vout v in v0 c in vss s-817 tr1 v o series device figure 16
super-small package cmos voltage regulator rev.3.0 _00 s-817 series seiko instruments inc. 17 the s-817 series can be configured as a constant current circuit. refer to figure 15 and 16 . constant amperage (i o ) is calculated using the following equation (v out(e) : effective output voltage): i o = (v out(e) r l ) + i ss . please note that it is impossible to set constant amperage i o in case of circuit (1) of figure 15 to the value exceeding the drive ability of the s-817. however, circuit (2) of figure 16 is an example to set constant amperage to the value exceeding the drive ability of the s-817. circuit (2) incorporates a current boosting circuit. the maximum input voltage of the constant current circuit is the value obtained by adding 10 v to voltage of the device (v o ). it is not recommended to attach a capacitor between the s-817 power source vin and vss pin or between output vout and vss pin because rush current flows at powering on. an example of input voltage between v in and v o in circuit (2) vs. i o current characteristics v in, v o pins, input voltage - i o current s-817a11anb, s-817b11amc, tr : 2sk1213y, r 1 : 1 k ? , v o = 2 v 0.00 0.10 0.20 0.30 0.40 0.50 0.60 1.4 1.6 1.8 2 2.2 2.4 v in ? v o (v) i o (a) r l = 1.83 ? 2.2 ? 2.75 ? 3.67 ? 5.5 ? 11 ?
super-small package cmos voltage regulator s-817 series rev.3.0 _00 seiko instruments inc. 18 3. output voltage adjustment circuit (only for s817b series (product without short circuit protection)) gnd v0 r 2 r 1 vout vin v in c l c1 c in vss s-817 series figure 17 the output voltage can be boosted by us ing the configuration shown in figure 17 . the output voltage (v o ) can be calculated using the following equation (v out(e) :effective output voltage): v o = v out(e) (r 1 + r 2 ) r 1 + r 2 i ss set r 1 and r 2 to high values of resistance so as not to be affected by current consumption (i ss ). capacitor c1 is effective in minimizing output fl uctuation at powering on or due to power or load fluctuation. determine the optimum value on your ac tual device. but it is not also recommended to attach a capacitor between the s-817 series powe r source vin and vss pin or between output vout and vss pin because output fluctuation or oscillation at powering on might occur. as shown in figure 17 , a capacitor must be mounted between vi n and gnd, and between vout and gnd. ? 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 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 the output voltage may increase when a se ries regulator is used at low load current (1.0 a or less). ? generally a series regulator may cause oscillation, depending on the selection 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, incl uding evaluation of temperature characteristics. output capacitor (c l ) : 0.1 f or more equivalent series resistance (esr) : 30 ? or less input series resistance (r in ) : 10 ? or less ? the voltage regulator may oscillate when the imp edance of the power supply is high and the input capacitor is small or an input capacitor is not connected. ? the application conditions for the input voltage, out put voltage, and load current should not exceed the package power dissipation. ? 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 disputes arisin g out of or in connection with any infringement by products including this ic of patents owned by a third party.
super-small package cmos voltage regulator rev.3.0 _00 s-817 series seiko instruments inc. 19 ? typical characteristics 1. output voltage vs. output current (when load current increases) (a) s-817a series s-817a11a (ta=25 c) 0.0 0.3 0.6 0.9 1.2 0 20 40 60 80 i out (ma) v out (v) v in = 1.5v 2.1v 3.1v 4.1v 8v s-817a20a (ta=25 c) 0.0 0.5 1.0 1.5 2.0 2.5 0 30 60 90 120 i out (ma) v in = 2.4v 3v 10v 5v 4v v out (v) s-817a30a (ta=25 c) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0 30 60 90 120 150 i out (ma) 4v v in = 3.4v 5v 6v 10v v out (v) s-817a50a (ta=25 c) 0.0 1.0 2.0 3.0 4.0 5.0 0 40 80 120 160 200 i out (ma) v in =5.4v 6v 7v 8v 10v v out (v) (b) s-817b series s-817b11a (ta=25c) 0.0 0.3 0.6 0.9 1.2 0 50 100 150 200 250 i out (ma) v out (v) v in = 1.5v 2.1v 3.1v 4.1v 8v s-817b20a (ta=25c) 0.0 0.5 1.0 1.5 2.0 2.5 0 50 100 150 200 250 300 i out (ma) v out (v) v in =2.4v 3v 4v 5v 10v s-817b30a (ta=25c) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0 50 100 150 200 250 300 i out (ma) v out (v) v in = 3.4v 4v 5v 6v 10v s-817b50a (ta=25c) 0.0 1.0 2.0 3.0 4.0 5.0 0 50 100 150 200 250 300 i out (ma) v out (v) v in =5.4v 6v 7v 8v 10v
super-small package cmos voltage regulator s-817 series rev.3.0 _00 seiko instruments inc. 20 2. output voltage vs. input voltage s-817a11a/s-817b11a (ta=25c) 0.0 0.5 1.0 1.5 0 2 4 6 8 10 v in (v) i out 1ma 10ma 20ma =1 a v out (v) s-817a20a/s-817b20a (ta=25c) 0.0 0.5 1.0 1.5 2.0 2.5 0 2 4 6 8 10 v in (v) i out =1 a 1ma 10ma 20ma 50ma v out (v) s-817a30a/s-817b30a (ta=25c) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0 2 4 6 8 10 v in (v) i out =1 a 1ma 20ma 50ma 10ma v out (v) s-817a50a/s-817b50a (ta=25c) 0.0 1.0 2.0 3.0 4.0 5.0 0 2 4 6 8 10 v in (v) i out =1 a 1ma 10ma 20ma 50ma v out (v)
super-small package cmos voltage regulator rev.3.0 _00 s-817 series seiko instruments inc. 21 3. maximum output current vs. input voltage (a) s-817a series s-817a11a 0 20 40 60 80 100 0 2 4 6 8 10 v in (v) i out max.(ma) ta=-40 c 25 c 85 c s-817a20a 0 20 40 60 80 100 120 1 3 5 7 9 v in (v) ta=-40 c 25 c 85 c i out max.(ma) s-817a30a 0 30 60 90 120 150 180 2 4 6 8 10 v in (v) ta=-40 c 25 c 85 c i out max.(ma) s-817a50a 0 50 100 150 200 250 4 6 8 10 v in (v) ta=-40 c 25 c 85 c i out max.(ma) (b) s-817b series s-817b11a 0 50 100 150 200 250 300 0 2 4 6 8 10 v in (v) i out max.(ma) ta=-40c 25c 85c s-817b20a 0 50 100 150 200 250 300 0 2 4 6 8 10 v in (v) i out max.(ma) ta=-40c 25c 85c s-817b30a 0 50 100 150 200 250 300 2 4 6 8 10 v in (v) i out max.(ma) ta=-40c 25c 85c s-817b50a 0 50 100 150 200 250 300 4 6 8 10 v in (v) i out max.(ma) ta=-40c 25c 85c
super-small package cmos voltage regulator s-817 series rev.3.0 _00 seiko instruments inc. 22 4 . dropout voltage vs. output current s-817a11a/s-817b11a 0 500 1000 1500 2000 0 5 10 15 20 i out (ma) v dro p (mv) ta=-40c 25c 85c s-817a20a/s-817b20a 0 500 1000 1500 2000 0 10 20 30 40 i out (ma) v dro p (mv) ta=-40c 25c 85c s-817a30a/s-817b30a 0 400 800 1200 1600 0 10 20 30 40 50 i out (ma) v dro p (mv) ta=-40c 25c 85c s-817a50a/s-817b50a 0 200 400 600 800 1000 0 10 20 30 40 50 i out (ma) v dro p (mv) ta=-40c 25c 85c 5. output voltage vs. ambient temperature s-817a11a/s-817b11a 1.08 1.09 1.10 1.11 1.12 -50 0 50 100 ta (c) (v) v out v in =3.1v, i out =10ma s-817a20a/s-817b20a 1.96 1.98 2.00 2.02 2.04 -50 0 50 100 ta (c) (v) v in =4v, i out =10ma v out s-817a30a/s-817b30a 2.94 2.97 3.00 3.03 3.06 -50 0 50 100 ta (c) (v) v in =5v, i out =10ma v out s-817a50a/s-817b50a 4.90 4.95 5.00 5.05 5.10 -50 0 50 100 ta (c) (v) v in =7v, i out =10ma v out
super-small package cmos voltage regulator rev.3.0 _00 s-817 series seiko instruments inc. 23 6. line regulation 1 vs. ambient temperature 7. line regulation 2 vs. ambient temperature s-817b11/20/30/50a s-817a11/20/30/50a 0 5 10 15 20 25 30 -50 -25 0 25 50 75 100 ta (c) ? v out1 ( mv ) 3v 2v v out =1.1v 5v v in =v out(s) + 1v ? 10v, i out =1ma s-817b11/20/30/50a s-817a11/20/30/50a 0 5 10 15 20 25 30 -50 -25 0 25 50 75 100 ta (c) ? v out2 ( mv ) 3v 2v v out =1.1v 5v v in =v out(s) + 1v ? 10v, i out =1 a 8. load regulation vs. ambient temperature s-817b11/20/30/50a s-817a11/20/30/50a 0 10 20 30 40 50 60 70 80 -50 -25 0 25 50 75 100 ta (c) ? v out3 ( mv ) 2v(i out =20ma) v out =1.1v(i out =10ma) 3v(i out =30ma) 5v(i out =50ma) v in =v ou t (s) + 2v, i ou t =1 a ? i ou t
super-small package cmos voltage regulator s-817 series rev.3.0 _00 seiko instruments inc. 24 9. current consumption vs. input voltage s-817a11a/s-817b11a 0 0.4 0.8 1.2 1.6 0 2 4 6 8 10 v in (v) i ss1 ( a ) 85c ta=-40c 25c s-817a20a/s-817b20a 0 0.4 0.8 1.2 1.6 0 2 4 6 8 10 v in (v) i ss1 ( a ) ta=-40c 25c 85c s-817a30a/s-817b30a 0 0.4 0.8 1.2 1.6 0 2 4 6 8 10 v in (v) i ss1 ( a ) ta=-40c 25c 85c s-817a50a/s-817b50a 0 0.4 0.8 1.2 1.6 0 2 4 6 8 10 v in (v) i ss1 (ua) ta=-40c 25c 85c
super-small package cmos voltage regulator rev.3.0 _00 s-817 series seiko instruments inc. 25 ? reference data 1. transient response characteristics (typical data: ta = 25 c) overshoot input voltage o utput voltage or load current undershoot 1. 1 at powering on s-817a30a (when using a ceramic capacitor, c l = 1 f) time(100 s/div) v out (0.5 v/div) 10 v 0 v 3 v v in = 0 v 10 v, i out = 10 ma, c l = 1 f load dependencies of overshoot at powering on c l dependencies of overshoot at powering on 0 0.01 0.02 0.03 0.04 0.05 1.e-07 1.e-06 1.e-05 1.e-04 1.e-03 1.e-02 1.e-01 i out (a) over shoot(v) 2v 3v 5v v out =0 v v out(s) +2 v, c l =1 f 0 0.01 0.02 0.03 0.04 0.05 0.01 0.1 1 10 c l ( f) over shoot(v) 2v 3v 5v v in = 0 v v out(s) +2 v, i out = 10 m a v dd dependencies of overshoot at powering on ?t a? dependencies of overshoot at powering on 0 0.01 0.02 0.03 0.04 0.05 0 2 4 6 8 10 v dd (v) over shoot(v) 2v 3v 5v v in = 0 v v dd, i out = 10 ma, c l = 1 f 0 0.01 0.02 0.03 0.04 0.05 -50 0 50 100 ta ( c ) over shoot(v) 2v 3v 5v v in = 0 v v out(s) +2 v, i out = 10 ma, c l = 1 f
super-small package cmos voltage regulator s-817 series rev.3.0 _00 seiko instruments inc. 26 1. 2 at powering on s-817b30a (when using a ceramic capacitor, c l = 1 f) v in = 0 v 10 v, i out = 10 ma, c l = 1 f time(100 s/div) v out (0.5 v/div) 10 v 0 v 3 v load dependencies of overshoot at powering on c l dependencies of overshoot at powering on 0 0.01 0.02 0.03 0.04 0.05 1.e-07 1.e-06 1.e-05 1.e-04 1.e-03 1.e-02 1.e-01 i out (a) over shoot(v) 2v 3v 5v v in = 0 v v out(s) +2 v, c l = 1 f 0 0.01 0.02 0.03 0.04 0.05 0.01 0.1 1 10 c l ( f) over shoot(v) 2v 3v 5v v in = 0 v v out(s) +2 v, i out = 10 m a v dd dependencies of overshoot at powering on ?t a? dependencies of overshoot at powering on 0 0.01 0.02 0.03 0.04 0.05 0 2 4 6 8 10 v dd (v) over shoot(v) 2v 3v 5v v in = 0 v v dd, i out = 10 ma, c l = 1 f 0 0.01 0.02 0.03 0.04 0.05 -50 0 50 100 ta ( c ) over shoot(v) 2v 3v 5v v in = 0 v v out(s) +2 v, i out = 10 ma, c l = 1 f
super-small package cmos voltage regulator rev.3.0 _00 s-817 series seiko instruments inc. 27 1. 3 power fluctuation s-817a30a / s-817b30a (when using a ceramic capacitor, c l = 1 f) v in = 4 v 10 v,i out = 1 ma, c l = 1 f time(200 s/div) v out (0.2 v/div) 10 v 4 v 3 v load dependencies of overshoot at power fluctuation c l dependencies of overshoot at power fluctuation 0 0.1 0.2 0.3 0.4 0.5 1.e-07 1.e-06 1.e-05 1.e-04 1.e-03 1.e-02 1.e-01 i out (a) over shoot(v) 2 v 3 v 5 v v in = v out(s) + 1 v v out(s) + 2 v, c l = 1 f 0 0.2 0.4 0.6 0.8 1 0.01 0.1 1 10 c l ( f) over shoot(v) 2 v 3 v 5 v v in = v out(s) + 1 v v out(s) + 2 v, i out = 1 m a v dd dependencies of overshoot at power fluctuation ?ta? dependencies of overshoot at power fluctuation 0 0.2 0.4 0.6 0.8 1 0 2 4 6 8 10 v dd (v) over shoot(v) 2v 3v 5v v in = v out(s) + 1 v v dd , i out = 1 ma, c l = 1 f 0 0.2 0.4 0.6 0.8 1 -50 0 50 100 ta ( c ) over shoot(v) 2v 3v 5v v in = v out(s) + 1 v v out(s) + 2 v, i out = 1 ma, c l = 1 f
super-small package cmos voltage regulator s-817 series rev.3.0 _00 seiko instruments inc. 28 v in = 10 v 4 v,i out = 1 ma, c l = 1 f time(50 s/div) v out (0.02 v/div) 10 v 3 v 4 v load dependencies of undershoot at power fluctuation c l dependencies of undershoot at power fluctuation 0 0.1 0.2 0.3 0.4 0.5 1.e-07 1.e-06 1.e-05 1.e-04 1.e-03 1.e-02 1.e-01 i out (a) under shoot(v) 2v 3v 5v v in = v out(s) + 2 v v out(s) 1 v, c l = 1 f 0 0.2 0.4 0.6 0.8 1 0.01 0.1 1 10 c l ( f) under shoot(v) 2v 3v 5v v in = v out(s) + 2 v v out(s) + 1 v, i out = 1 ma v dd dependencies of undershoot at power fluctuation ?ta? dependencies of undershoot at power fluctuation 0 0.02 0.04 0.06 0.08 0.1 0 2 4 6 8 10 v dd (v) under shoot(v) 2v 3v 5v v in = v dd v out(s) +1 v, i out = 1 ma, c l = 1 f 0 0.02 0.04 0.06 0.08 0.1 -50 0 50 100 ta ( c ) under shoot(v) 2v 3v 5v v in = v out(s) + 2 v v out(s) + 1 v, i out = 1 ma, c l = 1 f
super-small package cmos voltage regulator rev.3.0 _00 s-817 series seiko instruments inc. 29 1. 4 load fluctuation s-817a30a/s-817b 30a (when using a ceramic capacitor, c l = 1 f) i out = 30 ma 10 a,v in = 5 v, c l = 1 f time(20 ms/div) v out (0.2 v/div) 10 a 3 v 30 ma load current dependencies of overshoot at load fluctuation c l dependencies of overshoot at load fluctuation 0 0.5 1 1.5 2 1.e-05 1.e-04 1.e-03 1.e-02 1.e-01 1.e+00 i out (a) over shoot(v) 2v 3v 5v v in = v out(s) +2 v, i out = i l 10 a, c l = 1 f 0 0.2 0.4 0.6 0.8 1 0.01 0.1 1 10 c l ( f) over shoot(v) 2v 3v 5v v in = v out(s) +2 v, i out = 10 ma 10 a v dd dependencies of overshoot at load fluctuation ?ta? dependencies of overshoot at load fluctuation 0 0.05 0.1 0.15 0.2 0 2 4 6 8 10 v dd (v) over shoot(v) 2v 3v 5v v in = v dd , i out = 10 ma, 10 a, c l = 1 f 0 0.05 0.1 0.15 0.2 -50 0 50 100 ta ( c ) over shoot(v) 2v 3v 5v v in = v out(s) +2 v, i out = 10 ma 10 a, c l = 1 f
super-small package cmos voltage regulator s-817 series rev.3.0 _00 seiko instruments inc. 30 i out =10 a 30ma, v in =5v, c l =1 f time(50 ms/div) v out (0.2v/div) 30ma 3v 10 a load current dependencies of undershoot at load fluctuation c l dependencies of undershoot at load fluctuation 0 0.5 1 1.5 2 1.e-05 1.e-04 1.e-03 1.e-02 1.e-01 1.e+00 i out (a) under shoot(v) 2v 3v 5v v in = v out(s) +2 v, i out = 10 a i l, c l = 1 a 0 0.2 0.4 0.6 0.8 1 1.2 1.4 0.01 0.1 1 10 c l ( f) under shoot(v) 2v 3v 5v v in = v out(s) +2 v, i out = 10 a 10 m a v dd dependencies of undershoot at load fluctuation ?ta? dependencies of undershoot at load fluctuation 0 0.1 0.2 0.3 0.4 0.5 0 2 4 6 8 10 v dd (v) under shoot(v) 2v 3v 5v v in = v dd , i out = 10 a 10 ma, c l = 1 f 0 0.1 0.2 0.3 0.4 0.5 -50 0 50 100 ta ( c ) under shoot(v) 2v 3v 5v v in = v out(s) +2 v, i out = 10 a 10 ma, c l = 1 f

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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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