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rev.1.0 _00 high ripple-rejection low dropout soft-start function cmos voltage regulator s-1137 series seiko instruments inc. 1 s-1137 series, developed using the cmos technology, is a positive voltage regulator ic which has the low dropout voltage, the high-accuracy output voltage and the soft-start functi on (300 ma output current). a 1.0 f small ceramic capacitor can be us ed. it operates with low current consumption of 45 a typ. the overcurrent protection circuit pr events the load curr ent from exceeding the capacitance of output transistor. the power-off circuit ensures longer battery life. compared to the conventional cmos technology regulator ics, various capacitors including small ceramic capacitors can be used for this ic. furthermore a small sot-89-5, sot- 23-5, and snt-6a(h) packages realize high-density mounting. ? features ? output voltage: 1.2 v to 3.5 v, selectable in 0.05 v step. ? low equivalent series resistance c apacitor : ceramic capacitor of 1.0 f or more can be used as the i/o capacitor. ? wide input voltage range: 1.7 v to 5.5 v ? high-accuracy output voltage: 1.0% (1.2 v to 1.45 v output product : 15 mv) ? low dropout voltage: 210 mv typ. (pr oducts having the out put of 2.8 v, i out = 300 ma) ? low current consumpti on: during operation: 45 a typ., 65 a max. during power-off: 0.1 a typ., 1.0 a max. ? output current: possible to output 300 ma (at v in v out(s) + 1.0 v) *1 ? soft-start circuit with external c apacitor: soft-start time : 0.7 ms (c ss = 1.0 nf) ? high ripple rejection: 70 db typ. (at 1.0 khz) ? built-in overcurrent protection circuit: limits overcurrent of output transistor ? built-in power-off circuit: ensures long battery life. ? discharge shunt circuit can be selected. ? pull-down register is selectable ? small package: sot-89-5, sot-23-5, snt-6a(h) ? lead-free product *1. attention should be paid to the power dissipation of the package when the out put current is large. ? applications ? power supply for battery-powered devices ? power supply for cellular phones, portable devices ? power supply for digital still cameras, tvs, dvd recorders ? packages drawing code package name package tape reel land sot-89-5 up005-a up005-a up005-a ? sot-23-5 mp005-a mp005-a mp005-a ? snt-6a(h) pi006-a pi006-a pi006-a pi006-a
high ripple-rejection low dropout so ft-start function cmos voltage regulato r s-1137 series rev.1.0 _00 seiko instruments inc. 2 ? block diagrams 1. s-1137 series a type function status on / off logic active ?h? discharge shunt function available pull-down resistor available vss on / off vin vout overcurrent protection circuit reference voltage circuit + ? * 1 *1 power-off circuit soft start circuit *1 ssc *1. parasitic diode figure 1 2. s-1137 series b type function status on / off logic active ?h? discharge shunt function available pull-down resistor none vss on / off vin vout overcurrent protection circuit reference voltage circuit + ? * 1 *1 power-off circuit soft start circuit *1 ssc *1. parasitic diode figure 2
high ripple-rejection low dropout soft- start function cmos voltage regulator rev.1.0 _00 s-1137 series seiko instruments inc. 3 3. s-1137 series c type function status on / off logic active ?h? discharge shunt function none pull-down resistor available vss on / off vin vout overcurrent protection circuit reference voltage circuit + ? * 1 power-off circuit soft start circuit *1 ssc *1. parasitic diode figure 3 4. s-1137 series d type function status on / off logic active ?h? discharge shunt function none pull-down resistor none vss on / off vin vout overcurrent protection circuit reference voltage circuit + ? * 1 power-off circuit soft start circuit *1 ssc *1. parasitic diode figure 4
high ripple-rejection low dropout so ft-start function cmos voltage regulato r s-1137 series rev.1.0 _00 seiko instruments inc. 4 ? product name structure users can select the product type, output voltage, and package type fo r the s-1137 series. refer to ? 1. product name ? regarding the content s of product name, ? 2. function list of product type ? regarding the product type. 1. product name (1) sot-89-5, snt-6a(h) s-1137 x xx ? xxxx g package abbreviation and ic packing specifications *1 u5t1: sot-89-5, tape i6t2: snt-6a(h), tape output voltage *2 12 to 35 (e.g., when the output vo ltage is 1.2 v, it is expressed as 12.) product type *3 a to d *1. refer to the tape specifications. *2. if you request the product which has 0.05 v step, contact our sales office. *3. refer to ? 2. function list of product type ?. (2) sot-23-5 s-1137 x xx ? m5t1 s package abbreviation and ic packing specifications *1 m5t1: sot-23-5, tape output voltage *2 12 to 35 (e.g., when the output vo ltage is 1.2 v, it is expressed as 12.) product type *3 a to d *1. refer to the tape specifications. *2. if you request the product which has 0.05 v step, contact our sales office. *3. refer to ? 2. function list of product type ?.
high ripple-rejection low dropout soft- start function cmos voltage regulator rev.1.0 _00 s-1137 series seiko instruments inc. 5 2. function list of product type table 1 product type on / off logic discharge shunt function pull-down resistor a active ?h? available available b active ?h? available none c active ?h? none available d active ?h? none none
high ripple-rejection low dropout so ft-start function cmos voltage regulato r s-1137 series rev.1.0 _00 seiko instruments inc. 6 3. product name list 3. 1 s-1137 series a type on / off logic: active ?h? discharge shunt function: availabl e pull-down resistor: available table 2 output voltage sot-89-5 sot-23-5 snt-6a(h) 1.2 v 15 mv s-1137a12-u5t1g s-1137a12-m5t1s s-1137a12-i6t2g 1.3 v 15 mv s-1137a13-u5t1g s-1137a13-m5t1s s-1137a13-i6t2g 1.4 v 15 mv s-1137a14-u5t1g s-1137a14-m5t1s s-1137a14-i6t2g 1.5 v 1.0% s-1137a15-u5t1g s-1137a15-m5t1s s-1137a15-i6t2g 1.6 v 1.0% s-1137a16-u5t1g s-1137a16-m5t1s s-1137a16-i6t2g 1.7 v 1.0% s-1137a17-u5t1g s-1137a17-m5t1s s-1137a17-i6t2g 1.8 v 1.0% s-1137a18-u5t1g s-1137a18-m5t1s s-1137a18-i6t2g 1.85 v 1.0% s-1137a1j-u5t1g s-1137a 1j-m5t1s s-1137a1j-i6t2g 1.9 v 1.0% s-1137a19-u5t1g s-1137a19-m5t1s s-1137a19-i6t2g 2.0 v 1.0% s-1137a20-u5t1g s-1137a20-m5t1s s-1137a20-i6t2g 2.1 v 1.0% s-1137a21-u5t1g s-1137a21-m5t1s s-1137a21-i6t2g 2.2 v 1.0% s-1137a22-u5t1g s-1137a22-m5t1s s-1137a22-i6t2g 2.3 v 1.0% s-1137a23-u5t1g s-1137a23-m5t1s s-1137a23-i6t2g 2.4 v 1.0% s-1137a24-u5t1g s-1137a24-m5t1s s-1137a24-i6t2g 2.5 v 1.0% s-1137a25-u5t1g s-1137a25-m5t1s s-1137a25-i6t2g 2.6 v 1.0% s-1137a26-u5t1g s-1137a26-m5t1s s-1137a26-i6t2g 2.7 v 1.0% s-1137a27-u5t1g s-1137a27-m5t1s s-1137a27-i6t2g 2.8 v 1.0% s-1137a28-u5t1g s-1137a28-m5t1s s-1137a28-i6t2g 2.85 v 1.0% s-1137a2j-u5t1g s-1137a 2j-m5t1s s-1137a2j-i6t2g 2.9 v 1.0% s-1137a29-u5t1g s-1137a29-m5t1s s-1137a29-i6t2g 3.0 v 1.0% s-1137a30-u5t1g s-1137a30-m5t1s s-1137a30-i6t2g 3.1 v 1.0% s-1137a31-u5t1g s-1137a31-m5t1s s-1137a31-i6t2g 3.2 v 1.0% s-1137a32-u5t1g s-1137a32-m5t1s s-1137a32-i6t2g 3.3 v 1.0% s-1137a33-u5t1g s-1137a33-m5t1s s-1137a33-i6t2g 3.4 v 1.0% s-1137a34-u5t1g s-1137a34-m5t1s s-1137a34-i6t2g 3.5 v 1.0% s-1137a35-u5t1g s-1137a35-m5t1s s-1137a35-i6t2g remark please contact our sales office for products with specifications other than the above.
high ripple-rejection low dropout soft- start function cmos voltage regulator rev.1.0 _00 s-1137 series seiko instruments inc. 7 3. 2 s-1137 series b type on / off logic: active ?h? discharge shunt function: ava ilable pull-down resistor: none table 3 output voltage sot-89-5 sot-23-5 snt-6a(h) 1.2 v 15 mv s-1137b12-u5t1g s-1137b12-m5t1s s-1137b12-i6t2g 1.3 v 15 mv s-1137b13-u5t1g s-1137b13-m5t1s s-1137b13-i6t2g 1.4 v 15 mv s-1137b14-u5t1g s-1137b14-m5t1s s-1137b14-i6t2g 1.5 v 1.0% s-1137b15-u5t1g s-1137b15-m5t1s s-1137b15-i6t2g 1.6 v 1.0% s-1137b16-u5t1g s-1137b16-m5t1s s-1137b16-i6t2g 1.7 v 1.0% s-1137b17-u5t1g s-1137b17-m5t1s s-1137b17-i6t2g 1.8 v 1.0% s-1137b18-u5t1g s-1137b18-m5t1s s-1137b18-i6t2g 1.85 v 1.0% s-1137b1j-u5t1g s-1137b 1j-m5t1s s-1137b1j-i6t2g 1.9 v 1.0% s-1137b19-u5t1g s-1137b19-m5t1s s-1137b19-i6t2g 2.0 v 1.0% s-1137b20-u5t1g S-1137B20-M5T1s s-1137b20-i6t2g 2.1 v 1.0% s-1137b21-u5t1g s-1137b21-m5t1s s-1137b21-i6t2g 2.2 v 1.0% s-1137b22-u5t1g s-1137b22-m5t1s s-1137b22-i6t2g 2.3 v 1.0% s-1137b23-u5t1g s-1137b23-m5t1s s-1137b23-i6t2g 2.4 v 1.0% s-1137b24-u5t1g s-1137b24-m5t1s s-1137b24-i6t2g 2.5 v 1.0% s-1137b25-u5t1g s-1137b25-m5t1s s-1137b25-i6t2g 2.6 v 1.0% s-1137b26-u5t1g s-1137b26-m5t1s s-1137b26-i6t2g 2.7 v 1.0% s-1137b27-u5t1g s-1137b27-m5t1s s-1137b27-i6t2g 2.8 v 1.0% s-1137b28-u5t1g s-1137b28-m5t1s s-1137b28-i6t2g 2.85 v 1.0% s-1137b2j-u5t1g s-1137b 2j-m5t1s s-1137b2j-i6t2g 2.9 v 1.0% s-1137b29-u5t1g s-1137b29-m5t1s s-1137b29-i6t2g 3.0 v 1.0% s-1137b30-u5t1g s-1137b30-m5t1s s-1137b30-i6t2g 3.1 v 1.0% s-1137b31-u5t1g s-1137b31-m5t1s s-1137b31-i6t2g 3.2 v 1.0% s-1137b32-u5t1g s-1137b32-m5t1s s-1137b32-i6t2g 3.3 v 1.0% s-1137b33-u5t1g s-1137b33-m5t1s s-1137b33-i6t2g 3.4 v 1.0% s-1137b34-u5t1g s-1137b34-m5t1s s-1137b34-i6t2g 3.5 v 1.0% s-1137b35-u5t1g s-1137b35-m5t1s s-1137b35-i6t2g remark please contact our sales office for products with specifications other than the above.
high ripple-rejection low dropout so ft-start function cmos voltage regulato r s-1137 series rev.1.0 _00 seiko instruments inc. 8 3. 3 s-1137 series c type on / off logic: active ?h? discharge shunt function: none pull-down resistor: available table 4 output voltage sot-89-5 sot-23-5 snt-6a(h) 1.2 v 15 mv s-1137c12-u5t1g s-1137c12-m5t1s s-1137c12-i6t2g 1.3 v 15 mv s-1137c13-u5t1g s-1137c13-m5t1s s-1137c13-i6t2g 1.4 v 15 mv s-1137c14-u5t1g s-1137c14-m5t1s s-1137c14-i6t2g 1.5 v 1.0% s-1137c15-u5t1g s-1137c15-m5t1s s-1137c15-i6t2g 1.6 v 1.0% s-1137c16-u5t1g s-1137c16-m5t1s s-1137c16-i6t2g 1.7 v 1.0% s-1137c17-u5t1g s-1137c17-m5t1s s-1137c17-i6t2g 1.8 v 1.0% s-1137c18-u5t1g s-1137c18-m5t1s s-1137c18-i6t2g 1.85 v 1.0% s-1137c1j-u5t1g s-1137c 1j-m5t1s s-1137c1j-i6t2g 1.9 v 1.0% s-1137c19-u5t1g s-1137c19-m5t1s s-1137c19-i6t2g 2.0 v 1.0% s-1137c20-u5t1g s-1137c20-m5t1s s-1137c20-i6t2g 2.1 v 1.0% s-1137c21-u5t1g s-1137c21-m5t1s s-1137c21-i6t2g 2.2 v 1.0% s-1137c22-u5t1g s-1137c22-m5t1s s-1137c22-i6t2g 2.3 v 1.0% s-1137c23-u5t1g s-1137c23-m5t1s s-1137c23-i6t2g 2.4 v 1.0% s-1137c24-u5t1g s-1137c24-m5t1s s-1137c24-i6t2g 2.5 v 1.0% s-1137c25-u5t1g s-1137c25-m5t1s s-1137c25-i6t2g 2.6 v 1.0% s-1137c26-u5t1g s-1137c26-m5t1s s-1137c26-i6t2g 2.7 v 1.0% s-1137c27-u5t1g s-1137c27-m5t1s s-1137c27-i6t2g 2.8 v 1.0% s-1137c28-u5t1g s-1137c28-m5t1s s-1137c28-i6t2g 2.85 v 1.0% s-1137c2j-u5t1g s-1137c 2j-m5t1s s-1137c2j-i6t2g 2.9 v 1.0% s-1137c29-u5t1g s-1137c29-m5t1s s-1137c29-i6t2g 3.0 v 1.0% s-1137c30-u5t1g s-1137c30-m5t1s s-1137c30-i6t2g 3.1 v 1.0% s-1137c31-u5t1g s-1137c31-m5t1s s-1137c31-i6t2g 3.2 v 1.0% s-1137c32-u5t1g s-1137c32-m5t1s s-1137c32-i6t2g 3.3 v 1.0% s-1137c33-u5t1g s-1137c33-m5t1s s-1137c33-i6t2g 3.4 v 1.0% s-1137c34-u5t1g s-1137c34-m5t1s s-1137c34-i6t2g 3.5 v 1.0% s-1137c35-u5t1g s-1137c35-m5t1s s-1137c35-i6t2g remark please contact our sales office for products with specifications other than the above.
high ripple-rejection low dropout soft- start function cmos voltage regulator rev.1.0 _00 s-1137 series seiko instruments inc. 9 3. 4 s-1137 series d type on / off logic: active ?h? discharge shunt function: n one pull-down resistor: none table 5 output voltage sot-89-5 sot-23-5 snt-6a(h) 1.2 v 15 mv s-1137d12-u5t1g s-1137d12-m5t1s s-1137d12-i6t2g 1.3 v 15 mv s-1137d13-u5t1g s-1137d13-m5t1s s-1137d13-i6t2g 1.4 v 15 mv s-1137d14-u5t1g s-1137d14-m5t1s s-1137d14-i6t2g 1.5 v 1.0% s-1137d15-u5t1g s-1137d15-m5t1s s-1137d15-i6t2g 1.6 v 1.0% s-1137d16-u5t1g s-1137d16-m5t1s s-1137d16-i6t2g 1.7 v 1.0% s-1137d17-u5t1g s-1137d17-m5t1s s-1137d17-i6t2g 1.8 v 1.0% s-1137d18-u5t1g s-1137d18-m5t1s s-1137d18-i6t2g 1.85 v 1.0% s-1137d1j-u5t1g s-1137d 1j-m5t1s s-1137d1j-i6t2g 1.9 v 1.0% s-1137d19-u5t1g s-1137d19-m5t1s s-1137d19-i6t2g 2.0 v 1.0% s-1137d20-u5t1g s-1137d20-m5t1s s-1137d20-i6t2g 2.1 v 1.0% s-1137d21-u5t1g s-1137d21-m5t1s s-1137d21-i6t2g 2.2 v 1.0% s-1137d22-u5t1g s-1137d22-m5t1s s-1137d22-i6t2g 2.3 v 1.0% s-1137d23-u5t1g s-1137d23-m5t1s s-1137d23-i6t2g 2.4 v 1.0% s-1137d24-u5t1g s-1137d24-m5t1s s-1137d24-i6t2g 2.5 v 1.0% s-1137d25-u5t1g s-1137d25-m5t1s s-1137d25-i6t2g 2.6 v 1.0% s-1137d26-u5t1g s-1137d26-m5t1s s-1137d26-i6t2g 2.7 v 1.0% s-1137d27-u5t1g s-1137d27-m5t1s s-1137d27-i6t2g 2.8 v 1.0% s-1137d28-u5t1g s-1137d28-m5t1s s-1137d28-i6t2g 2.85 v 1.0% s-1137d2j-u5t1g s-1137d 2j-m5t1s s-1137d2j-i6t2g 2.9 v 1.0% s-1137d29-u5t1g s-1137d29-m5t1s s-1137d29-i6t2g 3.0 v 1.0% s-1137d30-u5t1g s-1137d30-m5t1s s-1137d30-i6t2g 3.1 v 1.0% s-1137d31-u5t1g s-1137d31-m5t1s s-1137d31-i6t2g 3.2 v 1.0% s-1137d32-u5t1g s-1137d32-m5t1s s-1137d32-i6t2g 3.3 v 1.0% s-1137d33-u5t1g s-1137d33-m5t1s s-1137d33-i6t2g 3.4 v 1.0% s-1137d34-u5t1g s-1137d34-m5t1s s-1137d34-i6t2g 3.5 v 1.0% s-1137d35-u5t1g s-1137d35-m5t1s s-1137d35-i6t2g remark please contact our sales office for products with specifications other than the above.
high ripple-rejection low dropout so ft-start function cmos voltage regulato r s-1137 series rev.1.0 _00 seiko instruments inc. 10 ? pin configurations table 6 pin no. symbol description 1 vout output voltage pin 2 vss gnd pin 3 ssc pin for soft-start control *1 4 on / off on / off pin 5 vin input voltage pin 5 4 1 3 2 sot-89-5 top vie w *1. connect a capacitor between the ssc and vss pins. by this capacitor?s value, the rising s peeds of vout at power-on and at turn-on the on / off pin are adjustable. for details, refer to ? selection of capacitor for soft-star t (c ss ) ?. figure 5 table 7 pin no. symbol description 1 vin input voltage pin 2 vss gnd pin 3 on / off on / off pin 4 ssc pin for soft-start control *1 5 vout output voltage pin 5 4 1 3 2 sot-23-5 top view *1. connect a capacitor between the ssc and vss pins. by this capacitor?s value, the rising s peeds of vout at power-on and at turn-on the on / off pin are adjustable. for details, refer to ? selection of capacitor for soft-star t (c ss ) ?. figure 6 table 8 pin no. symbol description 1 vout output voltage pin 2 vss gnd pin 3 ssc pin for soft-start control *1 4 on / off on / off pin 5 vss gnd pin 6 vin input voltage pin snt-6a(h) top view 1 2 3 4 6 5 figure 7 *1. connect a capacitor between the ssc and vss pins. by this capacitor?s value, the rising s peeds of vout at power-on and at turn-on the on / off pin are adjustable. for details, refer to ? selection of capacitor for soft-star t (c ss ) ?.
high ripple-rejection low dropout soft- start function cmos voltage regulator rev.1.0 _00 s-1137 series seiko instruments inc. 11 ? absolute maximum ratings table 9 (ta = 25 c unless otherwise specified) item symbol absolute maximum rating unit v in v ss ? 0.3 to v ss + 6.0 v v on / off v ss ? 0.3 to v in + 0.3 v input voltage v ssc v ss ? 0.3 to v in + 0.3 v output voltage v out v ss ? 0.3 to v in + 0.3 v sot-89-5 1000 *1 mw sot-23-5 600 *1 mw power dissipation snt-6a(h) p d 500 *1 mw operating ambient temperature t opr ? 40 to + 85 c storage temperature t stg ? 40 to + 125 c *1. when mounted on board [mounted board] (1) board size : 114.3 mm 76.2 mm t1.6 mm (2) name : jedec standard51-7 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. 0 50 100 150 0 power dissipation (p d ) [mw] ambient temperature (ta) [ c] 400 200 600 1000 800 1200 sot-89-5 snt-6a(h) sot-23-5 figure 8 power dissipation of package
high ripple-rejection low dropout so ft-start function cmos voltage regulato r s-1137 series rev.1.0 _00 seiko instruments inc. 12 ? electrical characteristics table 10 (1 / 2) (ta = 25 c unless otherwise specified) item symbol conditions min. typ. max. unit test circuit 1.2 v v out(s) < 1.5 v v out(s) ? 0.015 v out(s) v out(s) + 0.015 v 1 output voltage *1 v out(e) v in = v out(s) + 1.0 v, i out = 100 ma 1.5 v v out(s) 3.5 v v out(s) 0.99 v out(s) v out(s) 1.01 v 1 output current *2 i out v in v out(s) + 1.0 v 300 *5 ? ? ma 3 1.2 v v out(s) < 1.3 v 0.50 0.58 0.67 v 1 1.3 v v out(s) < 1.4 v ? 0.48 0.56 v 1 1.4 v v out(s) < 1.5 v ? 0.37 0.50 v 1 1.5 v v out(s) < 1.7 v ? 0.31 0.47 v 1 1.7 v v out(s) < 2.0 v ? 0.28 0.42 v 1 2.0 v v out(s) < 2.4 v ? 0.25 0.38 v 1 2.4 v v out(s) < 2.8 v ? 0.23 0.35 v 1 dropout voltage *3 v drop i out = 300 ma 2.8 v v out(s) 3.5 v ? 0.21 0.31 v 1 line regulation out in out1 v v v ? ? ? v out(s) + 0.5 v v in 5.5 v, i out = 100 ma ? 0.05 0.2 %/v 1 v in = v out(s) + 1.0 v, 1.0 ma i out 100 ma ? 15 40 mv 1 load regulation ? v out2 v in = v out(s) + 1.0 v, 1.0 ma i out 300 ma ? 45 120 mv 1 output voltage temperature coefficient *4 out out v ta v ? ? ? v in = v out(s) + 1.0 v, i out = 30 ma, ? 40 c ta +85 c ? 130 ? ppm/ c1 current consumption during operation i ss1 v in = v out(s) + 1.0 v, on / off pin = on, no load ? 45 65 a 2 current consumption during power-off i ss2 v in = v out(s) + 1.0 v, on / off pin = off, no load ? 0.1 1.0 a 2 input voltage v in ? 1.7 ? 5.5 v ? on / off pin input voltage ?h? v sh v in = v out(s) + 1.0 v, r l = 1.0 k ? determined by v out output level 1.0 ? ? v 4 on / off pin input voltage ?l? v sl v in = v out(s) + 1.0 v, r l = 1.0 k ? determined by v out output level ? ? 0.3 v 4 b / d type ? 0.1 ? 0.1 a 4 on / off pin input current ?h? i sh v in = 5.5 v, v on / off = 5.5 v a / c type 1.0 2.5 5.0 a 4 on / off pin input current ?l? i sl v in = 5.5 v, v on / off = 0 v ? 0.1 ? 0.1 a 4 ripple rejection rr v in = v out(s) + 1.0 v, f = 1.0 khz, ? v rip = 0.5 vrms, i out = 50 ma ? 70 ? db 5 short-circuit current i short v in = v out(s) + 1.0 v, on / off pin = on, v out = 0 v ? 150 ? ma 3 soft start time t ss v in = v out(s) + 1.0 v, i out = 100 ma, c l = 1.0 f, c ss = 1.0 nf ? 0.7 ? ms 1
high ripple-rejection low dropout soft- start function cmos voltage regulator rev.1.0 _00 s-1137 series seiko instruments inc. 13 table 10 (2 / 2) s-1137 series a / b type (with 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 in = 5.5 v ? 35 ? ? 3 s-1137 series a / c type (pull-down resistor) item symbol conditions min. typ. max. unit test circuit power-off pull-down resistor r pd ? 1.0 2.2 5.0 m ? 4 *1. v out(s) : specified output voltage v out(e) : actual output voltage output voltage when fixing i out (= 100 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 = 300 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. ? v out ? ta [] mv/c *1 = v out(s) [] v *2 ? v out ? ta ? v out [] ppm/c *3 1000 *1. change in temperature 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 sati sfied. attention s hould be paid to the power dissipation of the package w hen the output current is large. this specification is guaranteed by design.
high ripple-rejection low dropout so ft-start function cmos voltage regulato r s-1137 series rev.1.0 _00 seiko instruments inc. 14 ? test circuits 1. + vout vin vss + v a on / off ssc set to power on figure 9 2. vout vin + a on / off vss ssc set to v in or gnd figure 10 3. vout vin + v + a on / off vss ssc set to v in or gnd figure 11 4. vout vin + v on / off vss ssc + a r l figure 12 5. vout vin + v on / off vss ssc r l set to power on figure 13
high ripple-rejection low dropout soft- start function cmos voltage regulator rev.1.0 _00 s-1137 series seiko instruments inc. 15 ? standard circuit c in *1 c l *2 gnd vout vin vss on / off ssc c ss *3 input output single gnd *1. c in is a capacitor for stabilizing the input. *2. ceramic capacitor of 1.0 f or more can be used as c l . *3. a ceramic capacitor of 0.22 nf to 22 nf can be used for c ss . figure 14 caution the above connection diag ram and constant will not guara ntee successful operation. perform thorough evaluation using the actual application to set the constant. ? condition of application input capacitor (c in ) : 1.0 f or more output capacitor (c l ) : 1.0 f or more (ceramic capacitor) capacitor for soft-start (c ss ) : 0.22 nf to 22 nf (ceramic capacitor) caution a general series regulator may oscillate, depending on the external components. confirm that no oscillation occurs in the application fo r which the above capacitors are used. ? selection of input and output capacitors (c in , c l ) the s-1137 series requires an output c apacitor between the vout and vss pin fo r phase compensation. operation is stabilized by a ceramic capacitor with an output c apacitance of 1.0 f or more over the ent ire temperature range. when using an os capacitor, tantalum c apacitor, or aluminum electrolytic capacitor, the capac itance must be 1.0 f or more. the value of the output ov ershoot or undershoot transi ent response varies depending on the value of the output capacitor. the required capacitanc e of the input capacitor di ffers depending on the application. the recommended capacitance for an application is c in 1.0 f, c l 1.0 f; however, when selecting the output capacitor, perform sufficient evaluation, including evaluation of tem perature characteristics, on the actual device. ? selection of capacitor for soft-start (c ss ) the s-1137 series requires a capacitor for soft-start (c ss ) between the ssc and vss pins. in the all range of temperature, the s-1137 series operates stably with a ceramic capacitor of 0.22 nf or more . by the value of this c ss , the rising speed of the output vo ltage is adjustable. the time that the output voltage rises to 99% is 0.7 ms (typ.), c ss = 1 nf. the recommended value for applications is 0.22 nf c ss 22 nf, however, define the values by sufficient evaluation including the temperature c haracteristics under the usage condition.
high ripple-rejection low dropout so ft-start function cmos voltage regulato r s-1137 series rev.1.0 _00 seiko instruments inc. 16 ? explanation of terms 1. low dropout voltage regulator this ic?s voltage regulator has t he low dropout voltage due to its built -in low on-resistance transistor. 2. output voltage (v out ) the accuracy of the out put voltage is ensured at 1.0% or 15 mv *1 under the specified condi tions of fixed input voltage *2 , fixed output current, and fixed temperature. *1. when v out < 1.5 v : 15 mv, when 1.5 v v out : 1.0% *2. differs depending on the product. caution if the above conditions change, the output voltage value may vary and exceed the accuracy range of the output voltage. refer to ? ? electrical characteristics? and ? ? characteristics (typical data)? for details. 3. line regulation ? ? ? ? ? v out1 ? v in ? v out indicates the dependency of the out put voltage on the input volt age. that is, the values show how much the output voltage changes due to a change in the input volt age with the output curr ent remaining unchanged. 4. load regulation ( ? v out2 ) indicates the dependency of the out put voltage on the output curr ent. that is, the values show how much the output voltage changes due to a change in the output curr ent with the input voltage remaining unchanged. 5. dropout voltage (v drop ) indicates the differenc e between input voltage v in and the output voltage when; decreasing input voltage v in gradually until the output voltage has dropped out to the va lue of 98% of output voltage v out3 , which is at v in = v out(s) + 1.0 v. v drop = v in1 ? (v out3 0.98)
high ripple-rejection low dropout soft- start function cmos voltage regulator rev.1.0 _00 s-1137 series seiko instruments inc. 17 6. temperature coefficient of output voltage ? ? ? ? ? v out ? ta ? v out the shaded area in figure 15 is the range where v out varies in the operating temperature range when the temperature coefficient of the output voltage is 130 ppm/ c. v out(e) *1 example of s-1137b30 typ. products ? 40 25 + 0.39 mv/ c v out [v] *1. v out(e) is the value of the outp ut voltage measured at 25 c. 85 ta [ c] ? 0.39 mv/ c figure 15 a change in the temperature of t he output voltage [mv/c] is calcul ated using the following equation. ? v out ? ta [] mv/c *1 = v out(s) [] v *2 ? v out ? ta ? v out [] ppm/c *3 1000 *1. change in temperat ure of output voltage *2. specified output voltage *3. output voltage tem perature coefficient
high ripple-rejection low dropout so ft-start function cmos voltage regulato r s-1137 series rev.1.0 _00 seiko instruments inc. 18 ? operation 1. basic operation figure 16 shows the block diagram of s-1137 series. the error amplifier compar es the reference voltage (v ref ) with v fb , which is the output vo ltage resistance-divided by feedback resistors r s and r f . it supplies the gate voltage necessary to main tain the constant out put voltage which is not influenced by the input voltage and temper ature change, to the output transistor. *1 *1 . parasitic diode vss current supply ? + v fb v ref vin vout r f r s error amplifier reference voltage circuit figure 16 2. output transistor in the s-1137 series, a low on-resistance p-channel mos fet is used as the output transistor. be sure that v out does not exceed v in + 0.3 v to prevent the voltage regul ator from being damaged due to inverse current flowing from the vout pin th rough a parasitic diode to the vin pin.
high ripple-rejection low dropout soft- start function cmos voltage regulator rev.1.0 _00 s-1137 series seiko instruments inc. 19 3. on / off pin this pin starts and stops the regulator. when the on / off pin is set to the power-off 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. the s-1137 has a discharge shunt circui t which discharges the capacitor for soft-start (c ss ) so that the ssc pin is forcibly set to the v ss level. since the s-1137 series a / b types have a built-in dischar ge shunt circuit to discharge the output capac itance, the vout pin is forcibly set to v ss level. in the s-1137 series c / d types, the vout pin is set to v ss level through several hundred k ? internal divided resistors between the vout and vss pins. note that the current consum ption increases when a voltage of 0.3 v to 1.0 v (ta = 25 c) is applied to the on / off pin. the on / off pin is configured as shown in figures 17 and 18 . in the s-1137 series a / c types, the on / off pin is internally pulled down to vss in the float ing status, so the vout pin is set to the v ss level. in the s-1137 series b / d types, the on / off pin is not internally pulled down, so do not use these types wi th the on / off pin in the floating status. when not using the on / off pin in the s-1137 series b / d ty pes, connect the pin to the vin pin. table 11 logic type on / off pin internal circuit s vout pin voltage current consumption a / b / c / d ?h?: power-on operate set value i ss1 *1 a / b / c / d ?l?: power-off stop v ss level i ss2 *1 . ic?s current consumption increases as much as current flows into the pull-down resistor when the on / off pin is connected to vin and the s- 1137 series a / c types is operating ( figure 17 ). (1) s-1137 series a / c type (2) s-1137 series b / d type vss vin on / off vss vin on / off figure 17 figure 18
high ripple-rejection low dropout so ft-start function cmos voltage regulato r s-1137 series rev.1.0 _00 seiko instruments inc. 20 4. discharge shunt function (s-1137 series a / b types) the s-1137 series a / b types have a built-in discharge shunt circuit to discharge the out put capacitance. when the on / off pin is set to power-off level, turns the output transistor off, and turns the discharge shunt f unction on so that the output capacitor discharges. these types allow for the vout pin reach the v ss level faster than the s-1137 series c / d types that does not have a discharge shunt circuit. output transistor : off on / off pin : power-off vin on / off vss power-off circuit discharge shunt function : on vout *1 *1 . parasitic diode current flow gnd *1 s-1137 series output capacitance (c l ) figure 19 5. overcurrent protection circuit the s-1137 series has an overcurr ent protection circuit having t he characteristics shown in ? (1) output voltage vs. output current (when load current increases) (ta = 25 c) ? in ? ? characteristics (typical data) ?, in order to protect the output transistor against an excessive output current and short ci rcuiting between the vout and vss pins. the current (i short ) when the output pin is short-circ uited is internally set at approx . 150 ma (typ.), and the normal value is restored for the output voltage, if releasing a short circuit once. caution using the overcurrent protecti on circuit is to protect the output tr ansistor from accidental conditions such as short circuited load and the rapid and large current flow in the large capacitor. the overcurrent protection circuit is not suitable for use under the short circuit status or large current flowing (300 ma or more) that lasts long. 6. pull-down resistor (s-1137 series a / c types) in the s-1137 series a / c types, the on / off pin is inte rnally pulled down to vss, so the vout pin is in the v ss level when in the floating status. ic?s current consumption increases as much as cu rrent flows into the pull-down resistor of 2.2 m ? (typ.) when the on / off pin is connected to vin and the s- 1137 series a / c types is operating.
high ripple-rejection low dropout soft- start function cmos voltage regulator rev.1.0 _00 s-1137 series seiko instruments inc. 21 7. soft-start function the s-1137 series has a soft-start circ uit to suppress the rush current (i rush ) and overshoot of the output voltage generated at power-on the app lication or at turn-on the on / off pin. after immediately power-on the application or at turn-on the on / off pin, the output voltage slowly rises. the time that the output volt age rises to 99% (t ss ) is adjustable by a capacitor (c ss ) externally connected between the ssc and vss pins. when c ss = 1 nf, the time is 0.7 ms (typ.). when the on / off pin is off, the electric charge charged in the external capacitor (c ss ) will be discharged by the di scharge shunt transistor. the soft-start time (t ss ) is defined by time consonants of the built-in constant current (approx. 1 a) and the external capacitor (c ss ): t ss (ms) = soft-start coefficient c ss (nf) the soft-start coefficient (25 c) is as follows. min. : 0.4, typ. : 0.7, max. : 1.2 input voltage (v in ) ssc pin voltage (v ssc ) output voltage (v out ) v out 0.99 t [ms] soft-start time (t ss ) approx.0.7 v figure 20 the rush current can be suppressed gr eatly by the soft-start function. as the value of the external capacitor is larger, the rush current decreases more. figure 21 shows the waveform example of the rush current. input voltage (v in ) rush current (i rush ) t [ms] without soft-start : about 400 ma at the peak with soft-start : about 20 ma at the peak figure 21 waveform example of rush current
high ripple-rejection low dropout so ft-start function cmos voltage regulato r s-1137 series rev.1.0 _00 seiko instruments inc. 22 ? precautions ? wiring patterns for the vin, vout and gnd pins shoul d be designed so that the im pedance is low. when mounting an output capacitor between the vout and vss pins (c l ), the capacitor for stabilizi ng the input bet ween the vin and vss pins (c in ), and the capacitor for soft-star t between the ssc and vss pins, the di stance from the capacitors to these pins should be as short as possible. ? note that the output voltage may incr ease when a series regulator is used at low load current (1.0 ma or less). ? note that the output voltage may increase due to the leak age current from a driver when a series regulator is used at high temperature. ? generally a series regulator may cause oscillation, depending on the selecti on of external parts. the following conditions are recommended for this ic. however, be sure to perform sufficient eval uation under the actual usage conditions for selection, including evaluati on of temperature char acteristics. see ? (8) example of equivalent series resistance vs. output current characteristics (ta = 25 c) ? in ? ? reference data ? for the equivalent series resistance (r esr ) of the output capacitor. input capacitor (c in ) : 1.0 f or more output capacitor (c l ) : 1.0 f or more capacitor for soft-start (c ss ) : 0.22 nf to 22 nf ? 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 output capacitance is sm all, power supply?s fluctuati on and the characteristics of l oad fluctuation become worse. sufficiently evaluate the out put voltage?s fluctuation wi th the actual device. ? although this ic has a soft-start circuit, small overs hoot may be included in the output voltage by the lower-valued capacitor for soft-start (c ss ). evaluate sufficiently with actual devices. ? the application conditions for the input voltage, output volt age, and load current shoul d 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 out put current value specified in table 10 in ? ? electrical characteristics ? and footnote *5 of the table. ? sii claims no responsibility for any dis putes arising out of or in connection with any infringement by products including this ic of patents owned by a third party.
high ripple-rejection low dropout soft- start function cmos voltage regulator rev.1.0 _00 s-1137 series seiko instruments inc. 23 ? characteristics (typical data) (1) output voltage vs. output current (when load current increases) (ta = 25c) v out = 1.2 v v out = 2.5 v 0 100 200 v out [v] 0.8 0.4 0 i out [ma] 300 1.6 1.0 0.6 0.2 400 500 700 v in = 1.5 v 1.7 v 2.2 v 3.2 v 5.5 v 600 1.2 1.4 0 100 200 v out [v] 1.5 0 i out [ma] 300 3.0 2.0 1.0 0.5 400 500 700 600 2.5 v in = 2.8 v 3.0 v 3.5 v 4.5 v 5.5 v v out = 3.5 v 0 100 200 v out [v] 2.0 0 i out [ma] 300 4.0 2.5 1.5 0.5 400 500 700 600 3.0 v in = 3.8 v 4.0 v 4.5 v 5.5 v 1.0 3.5 remark in determining the output current, attention should be paid to the following. 1. the minimum output current value and footnote *5 in table 10 in the ? ? electrical characteristics ? 2. the package power dissipation (2) output voltage vs. input voltage (ta = 25c) v out = 1.2 v v out = 2.5 v 0 1.0 3.0 4.0 6.0 v out [v] 1.4 0.8 0.6 0.2 0 v in [v] 0.4 1.0 2.0 5.0 i out = 1 ma i out = 50 ma i out = 30 ma i out = 100 ma 1.2 0 1.0 3.0 4.0 6.0 v out [v] 3.0 2.0 1.5 0.5 0 v in [v] 1.0 2.5 2.0 5.0 i out = 1 ma i out = 50 ma i out = 30 ma i out = 100 ma v out = 3.5 v 0 1.0 3.0 4.0 6.0 v out [v] 4.0 2.0 1.5 0.5 0 v in [v] 1.0 2.5 2.0 5.0 i out = 1 ma i out = 50 ma i out = 30 ma i out = 100 ma 3.5 3.0
high ripple-rejection low dropout so ft-start function cmos voltage regulato r s-1137 series rev.1.0 _00 seiko instruments inc. 24 (3) dropout voltage vs. output current v out = 1.2 v v out = 2.5 v 0 100 200 v drop [v] 0.30 0.25 0.20 0.15 0.10 0.05 0 i out [ma] 150 50 0.35 250 300 ta = 85 c ta = 25 c ta = ? 40 c 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 0.16 0.20 250 300 ta = 85 c ta = 25 c ta = ? 40 c v out = 3.5 v 0 100 200 v drop [v] 0.14 0.12 0.10 0.08 0.06 0.04 0.02 0 i out [ma] 150 50 0.16 0.18 250 300 ta = 85 c ta = 25 c ta = ? 40 c (4) dropout voltage vs. set output voltage 1.0 2.0 2.5 v drop [v] 0.35 0.25 0.20 0.15 0.10 0.05 v out [v] 1.5 3.0 3.5 0 30 ma 0.30 i out = 300 ma 150 ma 100 ma 50 ma 10 ma 1 ma 0.1 ma
high ripple-rejection low dropout soft- start function cmos voltage regulator rev.1.0 _00 s-1137 series seiko instruments inc. 25 (5) output voltage vs. ambient temperature v out = 1.2 v v out = 2.5 v ? 40 0 255075 v out [v] 1.30 1.20 1.15 1.10 ta [ c] 1.25 ? 25 85 ? 40 0 25 50 75 v out [v] 2.70 2.50 2.40 2.30 ta [ c] 2.60 ? 25 85 2.55 2.45 2.35 2.65 v out = 3.5 v ? 40 0 25 50 75 v out [v] 3.8 3.5 3.4 3.2 ta [ c] 3.7 ? 25 85 3.6 3.3 (6) current consumption vs. input voltage v out = 1.2 v v out = 2.5 v 0 i ss1 [ a] 70 50 20 0 v in [v] 12 3 456 60 40 30 10 ta = 85 c 25 c ? 40 c 0 i ss1 [ a] 70 50 20 0 v in [v] 12 3 456 60 40 30 10 ta = 85 c 25 c ? 40 c v out = 3.5 v 0 i ss1 [ a] 70 50 20 0 v in [v] 12 3 456 60 40 30 10 ta = 85 c 25 c ? 40 c
high ripple-rejection low dropout so ft-start function cmos voltage regulato r s-1137 series rev.1.0 _00 seiko instruments inc. 26 (7) ripple rejection (ta = 25c) v out = 1.2 v v in = 2.2 v, c l = 1.0 f v out = 2.5 v v in = 3.5 v, c l = 1.0 f 10 100 1k 10k 100k ripple rejection [db] 0 20 40 60 80 frequency [hz] 1m 100 i out = 100 ma i out = 1 ma i out = 50 ma i out = 30 ma 10 100 1k 10k 100k ripple rejection [db] 0 20 40 60 80 frequency [hz] 1m 100 i out = 100 ma i out = 1 ma i out = 50 ma i out = 30 ma v out = 3.5 v v in = 4.5 v, c l = 1.0 f 10 100 1k 10k 100k ripple rejection [db] 0 20 40 60 80 frequency [hz] 1m 100 i out = 100 ma i out = 1 ma i out = 50 ma i out = 30 ma
high ripple-rejection low dropout soft- start function cmos voltage regulator rev.1.0 _00 s-1137 series seiko instruments inc. 27 ? reference data (1) transient response characteristics when input (ta = 25c) v out = 1.2 v i out = 100 ma, tr = tf = 5.0 s, c l = 1.0 f, c ss = 1.0 nf v out = 2.5 v i out = 100 ma, tr = tf = 5.0 s, c l = 1.0 f, c ss = 1.0 nf v out [v] 1.32 1.30 1.28 1.26 1.24 1.22 1.20 1.18 1.16 t [ s] v in [v] 4.0 3.0 2.5 2.0 0 0.5 1.0 1.5 3.5 ? 50 200 300 0 50 100 150 250 350 ? 100 v out v in v out [v] 2.74 2.70 2.66 2.62 2.58 2.54 2.50 2.46 2.42 t [ s] v in [v] 5.0 4.0 3.5 3.0 1.0 1.5 2.0 2.5 4.5 ? 50 200 300 0 50 100 150 250 350 ? 100 v out v in v out = 3.5 v i out = 100 ma, tr = tf = 5.0 s, c l = 1.0 f, c ss = 1.0 nf v out [v] 3.74 3.70 3.66 3.62 3.58 3.54 3.50 3.46 3.42 t [ s] v in [v] 6.0 5.0 4.5 4.0 2.0 2.5 3.0 3.5 5.5 ? 50 200 300 0 50 100 150 250 350 ? 100 v out v in (2) transient response characteristics of load (ta = 25c) v out = 1.2 v v in = 2.2 v, c in = c l = 1.0 f, c ss = 1.0 nf, i out = 50 ? 100 ma v out = 2.5 v v in = 3.5 v, c in = c l = 1.0 f, c ss = 1.0 nf, i out = 50 ? 100 ma v out [v] 1.40 1.35 1.25 1.20 1.15 1.10 t [ s] i out [ma] 100 150 0 ? 150 ? 50 ? 50 200 300 0 50 100 150 250 350 ? 100 50 ? 100 1.30 v out i out v out [v] 2.70 2.65 2.55 2.50 2.45 2.40 t [ s] i out [ma] 100 150 0 ? 150 ? 50 ? 50 200 300 0 50 100 150 250 350 ? 100 50 ? 100 2.60 v out i out v out = 3.5 v v in = 4.5 v, c in = c l = 1.0 f, c ss = 1.0 nf, i out = 50 ? 100 ma v out [v] 3.70 3.65 3.55 3.50 3.45 3.40 t [ s] i out [ma] 100 150 0 ? 150 ? 50 ? 50 200 300 0 50 100 150 250 350 ? 100 50 ? 100 3.60 v out i out
high ripple-rejection low dropout so ft-start function cmos voltage regulato r s-1137 series rev.1.0 _00 seiko instruments inc. 28 (3) transient response characteristics of on / off pin (ta = 25c) v out = 1.2 v v in = 2.2 v, tr = 1.0 s, c in = c l = 1.0 f, c ss = 1.0 nf, i out = 100 ma v out = 2.5 v v in = 3.5 v, tr = 1.0 s, c in = c l = 1.0 f, c ss = 1.0 nf, i out = 100 ma v out [v] 1.2 0.8 0.4 0 t [ms] v on / off [v] 3 2 1 0 0.5 1.0 1.5 1.6 2.0 2.4 0 ? 1 ? 2 ? 3 ? 0.5 2.0 v out v on / off v out [v] 3 2 1 0 t [ms] v on / off [v] 6 4 2 0 0.5 1.0 1.5 4 5 6 0 ? 2 ? 4 ? 6 ? 0.5 2.0 v out v on / off v out = 3.5 v v in = 4.5 v, tr = 1.0 s, c in = c l = 1.0 f, c ss = 1.0 nf, i out = 100 ma v out [v] 3 2 1 0 t [ms] v on / off [v] 6 4 2 0 0.5 1.0 1.5 4 5 6 0 ? 2 ? 4 ? 6 ? 0.5 2.0 v out v on / off (4) soft-start time vs. ambient temperature characteristics (5) soft-start time vs. capacitor for soft-start characteristics (ta = 25c) v in = v out + 1.0 v, v on / off = 0 v v out + 1.0 v, c in = c l = 1.0 f, c ss = 1.0 nf v in = v out + 1.0 v, v on / off = 0 v v out + 1.0 v, c in = c l = 1.0 f ? 40 0 25 50 75 t ss [ms] 1.4 0.6 0.4 0 ta [ c] 1.2 ? 25 85 0.8 0.2 1.0 v in = 1.2 v 2.5 v 3.5 v 0.1 1.0 t ss [ms] 1.0 0.1 c ss [nf] 100.0 10.0 10.0 100.0 v in = 1.2 v 2.5 v 3.5 v
high ripple-rejection low dropout soft- start function cmos voltage regulator rev.1.0 _00 s-1137 series seiko instruments inc. 29 (6) rush current characteristics (ta = 25c) v out = 1.2 v, v in = 2.2 v, i out = 0 ma, c l = 1.0 f, c ss = 0.22 nf v out = 1.2 v, v in = 2.2 v, i out = 0 ma, c l = 1.0 f, c ss = 1.0 nf i rush [ma] 160 200 80 0 4 0 120 ? 0.2 0.2 0.6 v on/off , v out [v] 2.0 1.5 1.0 0.5 0 t [ms] 0.4 0 2.5 0.8 1.0 v on/off v out i rush i rush [ma] 160 200 80 0 4 0 120 ? 0.2 0.2 0.6 v on/off , v out [v] 2.0 1.5 1.0 0.5 0 t [ms] 0.4 0 2.5 0.8 1.0 v on/off v out i rush v out = 1.2 v, v in = 2.2 v, i out = 0 ma, c l = 1.0 f, c ss = 22.0 nf i rush [ma] 80 100 40 0 2 0 60 ? 5515 v on/off , v out [v] 2.0 1.5 1.0 0.5 0 t [ms] 10 0 2.5 20 25 v on/off v out i rush v out = 3.5 v, v in = 4.5 v, i out = 0 ma, c l = 1.0 f, c ss = 0.22 nf v out = 3.5 v, v in = 4.5 v, i out = 0 ma, c l = 1.0 f, c ss = 1.0 nf i rush [ma] 160 200 80 0 4 0 120 ? 0.2 0.2 0.6 v on/off , v out [v] 4 3 2 1 0 t [ms] 0.4 0 5 0.8 1.0 v on/off v out i rush i rush [ma] 160 200 80 0 4 0 120 ? 0.2 0.2 0.6 v on/off , v out [v] 4 3 2 1 0 t [ms] 0.4 0 5 0.8 1.0 v on/off v out i rush v out = 3.5 v, v in = 4.5 v, i out = 0 ma, c l = 1.0 f, c ss = 22.0 nf i rush [ma] 80 100 40 0 2 0 60 ? 5515 v on/off , v out [v] 4 3 2 1 0 t [ms] 10 0 5 20 25 v on/off v out i rush
high ripple-rejection low dropout so ft-start function cmos voltage regulato r s-1137 series rev.1.0 _00 seiko instruments inc. 30 (7) output capacitance vs. characteristics of discharge time (ta = 25c) s-1137 series a / b type (with discharge shunt function) v in = v out + 1.0 v, i out = no load v on / off = v out + 1.0 v v ss , tf = 1 s t dsc [ms] 1.5 1.0 0.5 0 c l [ f] 24 6 8 2.0 2.5 01012 v out(s) = 1.2 v 3.5 v 2.5 v 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 22 measurement condition of discharge time (8) example of equivalent series resistance vs. output current characteristics (ta = 25 c) c l : murata manufacturing co., ltd. grm155b31a105k (1.0 f) c ss : murata manufacturing co., ltd. grm40b102k (1.0 nf) 100 0.1 300 i out [ma] r esr [ ? ] c in = c l = 1.0 f c ss = 1.0 nf 0 stable c in vin vss c ss s-1137 series vout on / off c l r esr ssc
high ripple-rejection low dropout soft- start function cmos voltage regulator rev.1.0 _00 s-1137 series seiko instruments inc. 31 ? marking specifications (1) sot-89-5 (1) to (3) : product code (refer to product name vs. product code ) (4) to (6) : lot number 5 4 1 3 2 sot-89-5 top view (2) (1) (3) (5) (4) (6) product name vs. product code (a) s-1137 series a type (b) s-1137 series b type product code product code product name (1) (2) (3) product name (1) (2) (3) s-1137a12-u5t1g v h c s-1137b12-u5t1g v i c s-1137a13-u5t1g v h d s-1137b13-u5t1g v i d s-1137a14-u5t1g v h e s-1137b14-u5t1g v i e s-1137a15-u5t1g v h f s-1137b15-u5t1g v i f s-1137a16-u5t1g v h g s-1137b16-u5t1g v i g s-1137a17-u5t1g v h h s-1137b17-u5t1g v i h s-1137a18-u5t1g v h i s-1137b18-u5t1g v i i s-1137a1j-u5t1g v h j s-1137b1j-u5t1g v i j s-1137a19-u5t1g v h k s-1137b19-u5t1g v i k s-1137a20-u5t1g v h l s-1137b20-u5t1g v i l s-1137a21-u5t1g v h m s-1137b21-u5t1g v i m s-1137a22-u5t1g v h n s-1137b22-u5t1g v i n s-1137a23-u5t1g v h o s-1137b23-u5t1g v i o s-1137a24-u5t1g v h p s-1137b24-u5t1g v i p s-1137a25-u5t1g v h q s-1137b25-u5t1g v i q s-1137a26-u5t1g v h r s-1137b26-u5t1g v i r s-1137a27-u5t1g v h s s-1137b27-u5t1g v i s s-1137a28-u5t1g v h t s-1137b28-u5t1g v i t s-1137a2j-u5t1g v h u s-1137b2j-u5t1g v i u s-1137a29-u5t1g v h v s-1137b29-u5t1g v i v s-1137a30-u5t1g v h w s-1137b30-u5t1g v i w s-1137a31-u5t1g v h x s-1137b31-u5t1g v i x s-1137a32-u5t1g v h y s-1137b32-u5t1g v i y s-1137a33-u5t1g v h z s-1137b33-u5t1g v i z s-1137a34-u5t1g v h 2 s-1137b34-u5t1g v i 2 s-1137a35-u5t1g v h 3 s-1137b35-u5t1g v i 3 remark please contact our sales office for products with specifications other than the above.
high ripple-rejection low dropout so ft-start function cmos voltage regulato r s-1137 series rev.1.0 _00 seiko instruments inc. 32 (c) s-1137 series c type (d) s-1137 series d type product code product code product name (1) (2) (3) product name (1) (2) (3) s-1137c12-u5t1g v j c s-1137d12-u5t1g v k c s-1137c13-u5t1g v j d s-1137d13-u5t1g v k d s-1137c14-u5t1g v j e s-1137d14-u5t1g v k e s-1137c15-u5t1g v j f s-1137d15-u5t1g v k f s-1137c16-u5t1g v j g s-1137d16-u5t1g v k g s-1137c17-u5t1g v j h s-1137d17-u5t1g v k h s-1137c18-u5t1g v j i s-1137d18-u5t1g v k i s-1137c1j-u5t1g v j j s-1137d1j-u5t1g v k j s-1137c19-u5t1g v j k s-1137d19-u5t1g v k k s-1137c20-u5t1g v j l s-1137d20-u5t1g v k l s-1137c21-u5t1g v j m s-1137d21-u5t1g v k m s-1137c22-u5t1g v j n s-1137d22-u5t1g v k n s-1137c23-u5t1g v j o s-1137d23-u5t1g v k o s-1137c24-u5t1g v j p s-1137d24-u5t1g v k p s-1137c25-u5t1g v j q s-1137d25-u5t1g v k q s-1137c26-u5t1g v j r s-1137d26-u5t1g v k r s-1137c27-u5t1g v j s s-1137d27-u5t1g v k s s-1137c28-u5t1g v j t s-1137d28-u5t1g v k t s-1137c2j-u5t1g v j u s-1137d2j-u5t1g v k u s-1137c29-u5t1g v j v s-1137d29-u5t1g v k v s-1137c30-u5t1g v j w s-1137d30-u5t1g v k w s-1137c31-u5t1g v j x s-1137d31-u5t1g v k x s-1137c32-u5t1g v j y s-1137d32-u5t1g v k y s-1137c33-u5t1g v j z s-1137d33-u5t1g v k z s-1137c34-u5t1g v j 2 s-1137d34-u5t1g v k 2 s-1137c35-u5t1g v j 3 s-1137d35-u5t1g v k 3 remark please contact our sales office for products with specifications other than the above.
high ripple-rejection low dropout soft- start function cmos voltage regulator rev.1.0 _00 s-1137 series seiko instruments inc. 33 (2) sot-23-5 (1) to (3) : product code (refer to product name vs. product code ) (4) : lot number 5 4 1 3 2 (1) (2) (3) (4) sot-23-5 to p vie w product name vs. product code (a) s-1137 series a type (b) s-1137 series b type product code product code product name (1) (2) (3) product name (1) (2) (3) s-1137a12-m5t1s v h c s-1137b12-m5t1s v i c s-1137a13-m5t1s v h d s-1137b13-m5t1s v i d s-1137a14-m5t1s v h e s-1137b14-m5t1s v i e s-1137a15-m5t1s v h f s-1137b15-m5t1s v i f s-1137a16-m5t1s v h g s-1137b16-m5t1s v i g s-1137a17-m5t1s v h h s-1137b17-m5t1s v i h s-1137a18-m5t1s v h i s-1137b18-m5t1s v i i s-1137a1j-m5t1s v h j s-1137b1j-m5t1s v i j s-1137a19-m5t1s v h k s-1137b19-m5t1s v i k s-1137a20-m5t1s v h l S-1137B20-M5T1s v i l s-1137a21-m5t1s v h m s-1137b21-m5t1s v i m s-1137a22-m5t1s v h n s-1137b22-m5t1s v i n s-1137a23-m5t1s v h o s-1137b23-m5t1s v i o s-1137a24-m5t1s v h p s-1137b24-m5t1s v i p s-1137a25-m5t1s v h q s-1137b25-m5t1s v i q s-1137a26-m5t1s v h r s-1137b26-m5t1s v i r s-1137a27-m5t1s v h s s-1137b27-m5t1s v i s s-1137a28-m5t1s v h t s-1137b28-m5t1s v i t s-1137a2j-m5t1s v h u s-1137b2j-m5t1s v i u s-1137a29-m5t1s v h v s-1137b29-m5t1s v i v s-1137a30-m5t1s v h w s-1137b30-m5t1s v i w s-1137a31-m5t1s v h x s-1137b31-m5t1s v i x s-1137a32-m5t1s v h y s-1137b32-m5t1s v i y s-1137a33-m5t1s v h z s-1137b33-m5t1s v i z s-1137a34-m5t1s v h 2 s-1137b34-m5t1s v i 2 s-1137a35-m5t1s v h 3 s-1137b35-m5t1s v i 3 remark please contact our sales office for products with specifications other than the above.
high ripple-rejection low dropout so ft-start function cmos voltage regulato r s-1137 series rev.1.0 _00 seiko instruments inc. 34 (c) s-1137 series c type (d) s-1137 series d type product code product code product name (1) (2) (3) product name (1) (2) (3) s-1137c12-m5t1s v j c s-1137d12-m5t1s v k c s-1137c13-m5t1s v j d s-1137d13-m5t1s v k d s-1137c14-m5t1s v j e s-1137d14-m5t1s v k e s-1137c15-m5t1s v j f s-1137d15-m5t1s v k f s-1137c16-m5t1s v j g s-1137d16-m5t1s v k g s-1137c17-m5t1s v j h s-1137d17-m5t1s v k h s-1137c18-m5t1s v j i s-1137d18-m5t1s v k i s-1137c1j-m5t1s v j j s-1137d1j-m5t1s v k j s-1137c19-m5t1s v j k s-1137d19-m5t1s v k k s-1137c20-m5t1s v j l s-1137d20-m5t1s v k l s-1137c21-m5t1s v j m s-1137d21-m5t1s v k m s-1137c22-m5t1s v j n s-1137d22-m5t1s v k n s-1137c23-m5t1s v j o s-1137d23-m5t1s v k o s-1137c24-m5t1s v j p s-1137d24-m5t1s v k p s-1137c25-m5t1s v j q s-1137d25-m5t1s v k q s-1137c26-m5t1s v j r s-1137d26-m5t1s v k r s-1137c27-m5t1s v j s s-1137d27-m5t1s v k s s-1137c28-m5t1s v j t s-1137d28-m5t1s v k t s-1137c2j-m5t1s v j u s-1137d2j-m5t1s v k u s-1137c29-m5t1s v j v s-1137d29-m5t1s v k v s-1137c30-m5t1s v j w s-1137d30-m5t1s v k w s-1137c31-m5t1s v j x s-1137d31-m5t1s v k x s-1137c32-m5t1s v j y s-1137d32-m5t1s v k y s-1137c33-m5t1s v j z s-1137d33-m5t1s v k z s-1137c34-m5t1s v j 2 s-1137d34-m5t1s v k 2 s-1137c35-m5t1s v j 3 s-1137d35-m5t1s v k 3 remark please contact our sales office for products with specifications other than the above.
high ripple-rejection low dropout soft- start function cmos voltage regulator rev.1.0 _00 s-1137 series seiko instruments inc. 35 (3) snt-6a(h) (1) to (3) : product code (refer to product name vs. product code ) (4) to (6) : lot number snt-6a(h) top view 1 2 3 4 6 5 (1) (4) (2) (5) (3) (6) product name vs. product code (a) s-1137 series a type (b) s-1137 series b type product code product code product name (1) (2) (3) product name (1) (2) (3) s-1137a12-i6t2g v h c s-1137b12-i6t2g v i c s-1137a13-i6t2g v h d s-1137b13-i6t2g v i d s-1137a14-i6t2g v h e s-1137b14-i6t2g v i e s-1137a15-i6t2g v h f s-1137b15-i6t2g v i f s-1137a16-i6t2g v h g s-1137b16-i6t2g v i g s-1137a17-i6t2g v h h s-1137b17-i6t2g v i h s-1137a18-i6t2g v h i s-1137b18-i6t2g v i i s-1137a1j-i6t2g v h j s-1137b1j-i6t2g v i j s-1137a19-i6t2g v h k s-1137b19-i6t2g v i k s-1137a20-i6t2g v h l s-1137b20-i6t2g v i l s-1137a21-i6t2g v h m s-1137b21-i6t2g v i m s-1137a22-i6t2g v h n s-1137b22-i6t2g v i n s-1137a23-i6t2g v h o s-1137b23-i6t2g v i o s-1137a24-i6t2g v h p s-1137b24-i6t2g v i p s-1137a25-i6t2g v h q s-1137b25-i6t2g v i q s-1137a26-i6t2g v h r s-1137b26-i6t2g v i r s-1137a27-i6t2g v h s s-1137b27-i6t2g v i s s-1137a28-i6t2g v h t s-1137b28-i6t2g v i t s-1137a2j-i6t2g v h u s-1137b2j-i6t2g v i u s-1137a29-i6t2g v h v s-1137b29-i6t2g v i v s-1137a30-i6t2g v h w s-1137b30-i6t2g v i w s-1137a31-i6t2g v h x s-1137b31-i6t2g v i x s-1137a32-i6t2g v h y s-1137b32-i6t2g v i y s-1137a33-i6t2g v h z s-1137b33-i6t2g v i z s-1137a34-i6t2g v h 2 s-1137b34-i6t2g v i 2 s-1137a35-i6t2g v h 3 s-1137b35-i6t2g v i 3 remark please contact our sales office for products with specifications other than the above.
high ripple-rejection low dropout so ft-start function cmos voltage regulato r s-1137 series rev.1.0 _00 seiko instruments inc. 36 (c) s-1137 series c type (d) s-1137 series d type product code product code product name (1) (2) (3) product name (1) (2) (3) s-1137c12-i6t2g v j c s-1137d12-i6t2g v k c s-1137c13-i6t2g v j d s-1137d13-i6t2g v k d s-1137c14-i6t2g v j e s-1137d14-i6t2g v k e s-1137c15-i6t2g v j f s-1137d15-i6t2g v k f s-1137c16-i6t2g v j g s-1137d16-i6t2g v k g s-1137c17-i6t2g v j h s-1137d17-i6t2g v k h s-1137c18-i6t2g v j i s-1137d18-i6t2g v k i s-1137c1j-i6t2g v j j s-1137d1j-i6t2g v k j s-1137c19-i6t2g v j k s-1137d19-i6t2g v k k s-1137c20-i6t2g v j l s-1137d20-i6t2g v k l s-1137c21-i6t2g v j m s-1137d21-i6t2g v k m s-1137c22-i6t2g v j n s-1137d22-i6t2g v k n s-1137c23-i6t2g v j o s-1137d23-i6t2g v k o s-1137c24-i6t2g v j p s-1137d24-i6t2g v k p s-1137c25-i6t2g v j q s-1137d25-i6t2g v k q s-1137c26-i6t2g v j r s-1137d26-i6t2g v k r s-1137c27-i6t2g v j s s-1137d27-i6t2g v k s s-1137c28-i6t2g v j t s-1137d28-i6t2g v k t s-1137c2j-i6t2g v j u s-1137d2j-i6t2g v k u s-1137c29-i6t2g v j v s-1137d29-i6t2g v k v s-1137c30-i6t2g v j w s-1137d30-i6t2g v k w s-1137c31-i6t2g v j x s-1137d31-i6t2g v k x s-1137c32-i6t2g v j y s-1137d32-i6t2g v k y s-1137c33-i6t2g v j z s-1137d33-i6t2g v k z s-1137c34-i6t2g v j 2 s-1137d34-i6t2g v k 2 s-1137c35-i6t2g v j 3 s-1137d35-i6t2g v k 3 remark please contact our sales office for products with specifications other than the above.

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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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