revision 12/4/2008 all contents are subject to change without prior notice. ? seaward electronics, inc., 2005. ? www.seawardinc.com.cn ? page 1 1.5v voltage reference SE5170 description SE5170 is a precision voltage reference that is designed to work at very low current and low voltage conditions. the SE5170 can work from a supply voltage as low as 1.6v, and consumes as low as 8ua current. temperatur e stability is averaging 50ppm/ o c. it is ideal for mp3/mpeg4 applications where a constant voltage reference is required, which is independent of the environment temperature. in addition, SE5170 is designed to be stable under conditions where cin and cout are not present. however, it is recommended to include cin and cout in the system design as this will increase the psrr rating, as shown in the psrr graph. features ? minimum vin at 1.6v. ? low ground current as low as 8ua. (typ.) ? guaranteed 5ma output current over the full operating temperature range. ? extremely low temperature drift at 50ppm/ o c. ? stable operation without cin and cout. ? rugged 5kv esd withstand capability. ? standard sot-23-3l package. pin configuration applications ? 1.5v reference for action 2051, 2085, 2097 mp3 solutions. ? 1.5v temperature indepe ndent voltage reference. ? other independent voltage reference applications. typical application cout = 1uf cin = 1uf
revision 12/4/2008 all contents are subject to change without prior notice. ? seaward electronics, inc., 2005. ? www.seawardinc.com.cn ? page 2 1.5v voltage reference SE5170 absolute maximum ratings (1) supply input voltage (v in ) ..???..??????.+6v power dissipation (p d ) ????.. internally limited (3) junction temperature (t j ) ???.......... ......?.. 150c lead temperature (solderi ng, 5 sec.) ??....?. 260c storage temperature (t s ) ????.. -10c to +150c operating ratings (2) supply input voltage (v in ) ??..?? +1.6v to +5.5v junction temperature (t j ) ??.??.. 0c to +125c package thermal resistance ?????? 250c/w electrical characteristics v in = 5v; i out = 1ma; t j = 25c, unless otherwise specified. symbol parameter conditions min typ max units v in input voltage range 1.6 6 v v out output voltage accuracy SE5170-1.5v 1.470 1.5 1.530 v v out / t output voltage temperature coefficient note 4 -- -50 -- ppm/ v out / v out line regulation v in = 1.6v to 5.5v -- 0.3 -- %/v v out / v out load regulation (5) v in =2v,i out =0ma to 5ma -- 1.0 -- % thermal protection temperature -- 150 -- t protection thermal protection protection hysterisys -- 20 -- psrr ripple rejection f =100hz,vin=2.2v,vp-p=1v -- 70 -- db i ground ground current i out =1ma -- 8 -- a
revision 12/4/2008 all contents are subject to change without prior notice. ? seaward electronics, inc., 2005. ? www.seawardinc.com.cn ? page 3 1.5v voltage reference SE5170 note 1: exceeding the absolute maximum rating may damage the device. note 2: the device is not guaranteed to f unction outside its operating rating. note 3: the maximum allowable power dissipation at any ta (ambient temperature) is calculated using: p d(max) = (t j(max) - t a )/ ja . exceeding the maximum allowable power dissipation wi ll result in excessive die temperature, and the regulator will go into thermal shutdown. note 4: output voltage temperature coefficient is the worst-case voltage change divided by the total temperature range. note 5: regulation is measured at constant junction temperatur e using low duty cycle pulse testing. parts are tested for load regulation in the load range from 0a to 5ma. changes in output voltage due to heating effects are covered by the thermal regulation specification.
revision 12/4/2008 all contents are subject to change without prior notice. ? seaward electronics, inc., 2005. ? www.seawardinc.com.cn ? page 4 1.5v voltage reference SE5170 line regulation (iout=1ma) 1.45 1.46 1.47 1.48 1.49 1.5 1.51 1.52 1.53 1.54 1.55 1.5 2.5 3.5 4.5 5.5 vin (v) vout (v) output voltage vs. temperature 1.45 1.46 1.47 1.48 1.49 1.5 1.51 1.52 1.53 1.54 1.55 0 20406080100120 temperature (c) output voltage (v) load regulation (vin=1.8v) 1.45 1.46 1.47 1.48 1.49 1.5 1.51 1.52 1.53 1.54 1.55 0123456 vin (v) vout (v) psrr (vin=2.2v,vp-p=1v,cin=cout) 0 10 20 30 40 50 60 70 80 0.1 1 10 100 frequency (khz) psrr (db) 1uf 0.1uf no cap iq vs. vin 1 3 5 7 9 11 13 15 02468 vin (v) iq (ua)
revision 12/4/2008 all contents are subject to change without prior notice. ? seaward electronics, inc., 2005. ? www.seawardinc.com.cn ? page 5 1.5v voltage reference SE5170 outline drawing sot-23-3l (sc-59) customer support seaward electronics incorporated ? china section b, 2nd floor, shangdi scientific office complex, #22 xinxi road haidian district, beijing 100085, china tel: 86-10-8289-5700/01/05 fax: 86-10-8289-5706 seaward electronics corporation ? taiwan 2f, #181, sec. 3, minquan east rd, ta i p e i , ta i w a n r . o . c tel: 886-2-2712-0307 fax: 886-2-2712-0191 seaward electronics incorporated ? north america 1512 centre pointe dr. milpitas, ca95035, usa tel: 1-408-821-6600 last updated - 12/4/2008 b c a d e f j g h k l mi n max mi n max a 0.110 0.120 2.80 3.04 b 0.047 0.055 1.20 1.40 c 0.083 0.104 2.10 2.64 d 0.035 0.040 0.89 1.03 e 0.070 0.080 1.7 8 2.0 5 f 0.018 0.024 0.4 5 0.60 g 0.015 0.020 0.37 0.51 h 0.0005 0.004 0.013 0.10 j 0.034 0.040 0.887 1.0 2 k 0.003 0.007 0.085 0.1 8 l - 0.027 - 0.69 dim n inches mm dimensions
|
