revision 4/19/2016 preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., 2005. ? www.seawardinc.com ? page 1 5 00ma cm os ldo voltage regulator (preliminary) se5218 description the se5218 series of fixed output low dropout lin ear regulators are designed for portable battery powered applications, which require low noise environment, fast enable response time, and low dropout voltage. each device contains a bandgap voltage reference, an error amplifier, a pmos power transistor, and resistors for setting output voltage, and current limit and temperature limit protection circuits. the se5218 has been designed to be used with low cost capacitors and requires a minimum output capacitor of 1.0 f. standard voltage versions are 1.2, 1.5, 1.8, 2.5, 2.8, 3.0, and 3.3v. pin configuration features ? typical 175mv dropout voltage at 150ma. ? fast enable turn - on time of 20s (typ.) ? excellent line and load regulation. ? high accuracy output voltage of 2%. ? ultra - low ground current at 65a (typ.) ? disable current less than 0.3a (typ.) ? thermal protection. ? standard sot - 23- 5l packages. applications ? usb removable devices ? mpeg4 devices ? wireless lan?s ? hand - held instrumentation. ? portable dvd players ? digital camera appl ication diagram
revision 4/19/2016 preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., 2005. ? www.seawardinc.com ? page 2 5 00ma cm os ldo voltage regulator (preliminary) se5218 absolute maximum rating (1) parameter symbol valu e units input voltage v in 6 v enable voltage v en - 0.3 to v in v power dissipation p d internally limited (3) output short circuit duration infinite thermal resistance, junction - to - ambient ja 230 (sot - 23- 5l) c/w lead temperature (soldering, 5 sec.) 260 c junction temperature t j +150 c storage temperature t s - 40 to +150 c operating rating (2) parameter symbol value units supply input voltage v in +2.8v to +5.5 v junction temperat ure t j 0 to +125 c ordering/marking information package ordering information marking information 3.3v se5218alg - lf 2 1 8alz starting with 5, a bar on top of 5 is for production year 2001, and underlined 5 is for year 2002. the next character is marked on top for 2003, and underlined for 2004. the naming pattern continues with consecutive characters for later years. the last character is the week code. ( a - z: 1 - 26, a - z: 27 - 52) a dot on top right corner is for lead - free process. 2.8v se5218blg - lf 2 1 8blz 2.5v se5218clg - lf 2 1 8clz 1.8v se5218dlg - lf 2 1 8dlz 1.5v se5218elg - lf 2 1 8elz 3.0v se5218flg - lf 2 1 8flz 1.2 v se5218 g lg - lf 2 1 8 g lz
revision 4/19/2016 preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., 2005. ? www.seawardinc.com ? page 3 5 00ma cm os ldo voltage regulator (preliminary) se5218 electri cal characteristics v in = 5 v; v en =v in ; c in = 2.2f; c out = 2.2f; i out = 10ma; t j = 25c; unless otherwise specified. symbol parameter conditions min typ max unit v out output voltage accuracy se5218 ? 1. 2(vin=3.3v ) se5218 ? 1.5 (v in =3.3v) se5218 ? 1.8 (v in = 3.3v) se5218 ? 2.5 se5218 ? 2.8 se5218 ? 3.0 se5218 ? 3.3 1.176 1.470 1.764 2.450 2.744 2.940 3.234 1.2 1.5 1.8 2.5 2.8 3.0 3.3 1.224 1.530 1.836 2.550 2.856 3.060 3.366 v v out line regulation v in = (v out +1) v to 5.5 v -- 1.0 -- %/v v out load regulat ion (5) v in = (v out +0.8) v or 2.5v i out = 10ma to 25 0ma -- 1.0 -- % i out = 10ma to 5 00ma -- 1.5 -- v out /t output voltage temperature coefficient note 4 -- 0.025 -- mv/c v in ? v out dropout voltage (6) i out = 10ma 15 mv i out = 1 50ma 175 i out = 250ma 320 i out = 4 00ma 600 t protection thermal protection thermal protection temperature -- 150 -- c protection hysterisys -- 20 -- psrr ripple rejection f = 120 hz -- 59 -- db i q quiescent current v en = 0 .4 v -- 0.3 -- a v en = v in -- 65 -- v th(en) enable input threshold voltage voltage increasing, output turns on, logic high 1.6 -- -- v voltage decreasing, output turns off, logic low -- -- 0.4 i limit current limit -- 8 00 -- ma
revision 4/19/2016 preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., 2005. ? www.seawardinc.com ? page 4 5 00ma cm os ldo voltage regulator (preliminary) se5218 note 1: exceeding the absolute maximum rating may damage the device. note 2: the device is not guaranteed to function outside its operating rating. note 3: the maximum allowable power dissipation at any t a (ambient temp erature) is calculated using: p d(max) = (t j(max) ? t a )/ ja . exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. see ?thermal consideration? section for details note 4: output voltage temperature coefficient is the wors t case voltage change divided by the total temperature range. note 5: regulation is measured at constant junction temperature using low duty cycle pulse testing. parts are tested for load regulation in the load range from 10ma to 5 00ma. changes in outpu t voltage due to heating effects are covered by the thermal regulation specification. note 6: dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1v differential. block diagram
revision 4/19/2016 preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., 2005. ? www.seawardinc.com ? page 5 5 00ma cm os ldo voltage regulator (preliminary) se5218 line regulation (vout = 3.3v) (vin = 4.3v to 6v, iout = 10ma) 3.0000 3.1000 3.2000 3.3000 3.4000 3.5000 3.6000 4.2 4.7 5.2 5.7 vin (v) vout (v) load regulation (vout = 3.3v) (vin = 5v, iout = 10ma to 500ma) 3.000 3.100 3.200 3.300 3.400 3.500 3.600 0 100 200 300 400 500 iout (ma) vout (v) output voltage vs temperature (vin = 5v, iout = 10ma) 3.270 3.280 3.290 3.300 3.310 3.320 3.330 0 20 40 60 80 100 120 temperature (c) vout (v) iq vs iout (vi n = 5v, i o ut = 10ma t o 500ma) 0 20 40 60 80 100 120 140 160 0 100 200 300 400 500 iout (ma ) iq (ua ) psrr (vout = 3.3) (vin = 5v, vpp = 1v) 0 10 20 30 40 50 60 70 100 1000 10000 frequency (hz) psrr (db) transient response (vout = 3.3v) (iout = 10ma to 40ma)
revision 4/19/2016 preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., 2005. ? www.seawardinc.com ? page 6 5 00ma cm os ldo voltage regulator (preliminary) se5218 application hints like any low dropout regulator, se5218 requires external capacitors to ensure stability. the external capacitors must be carefully selected to ensure performance. thermal considerations it is important that the thermal limit of the package is not exceeded. the se5218 has built - in thermal protection. when the thermal li mit is exceeded, the ic will enter protection, and v out will be pulled to ground. the power dissipation for a given application can be calculated as following: the power dissipation (p d ) is p d = i out * [v in ? v out ] the thermal limit of the package is t hen limited to p d(max) = [t j ? t a ]/ ja where t j is the junction temperature, ta is the ambient temperature, and ja for sot - 23- 5l is around 230c/w for se5218. se5218 is designed to enter thermal protection at 150c. for example, if t a is 25c then the maximum p d is limited to about 0.6 w. in other words, if i out(max) = 400ma, then [v in ? v out ] cannot exceed 1.5v. input capacitor an input capacitor of at least 1f is required. ceramic or tantalum can be used. the value can be increase without upper limit. output capacitor an output c apacitor is required for stability. it must be placed no more than 1 cm away from the v out pin, and connected directly between v out and gnd pins. the minimum value is 1f but may be increase without limit.
revision 4/19/2016 preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., 2005. ? www.seawardinc.com ? page 7 5 00ma cm os ldo voltage regulator (preliminary) se5218 outline drawing sot - 23- 5l customer support seaward electro nics incorporated ? china rm 1605, building 1, international pioneering park, #1 shangdi xinxi rd 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 eas t rd, taipei, taiwan 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 - 4/19/2016 b k a f d e c h j min max min max a 0.110 0.120 2.80 3.05 b 0.059 0.070 1.50 1.75 c 0.036 0.051 0.90 1.30 d 0.014 0.020 0.35 0.50 e - 0.037 - 0.95 f - 0.075 - 1.90 h - 0.006 - 0.15 j 0.0035 0.008 0.090 0.20 k 0.102 0.118 2.60 3.00 dim n inches mm dimensions
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