preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., ? www.seawardinc.com ? page 1 9/4/2012 se 5120 1. 5 a cmos ultra ldo voltage regulator typica l application general d escription the se5 1 20 series of fixed output ultra low dropout linear regulators are designed for portable battery powered applications, which require low power consumption and low dropout voltage. each device contains a bandgap voltage reference, an error amplifier, a pmos power transistor, and current limit and temperature limit protection circuits. the se5 1 20 is designed to work with low cost electrolytic and ceramic capacitors and requires a minimum output capacitor of 10f . featur es ? typical 150mv dropout voltage at 500ma. ? output voltages 0.8v to 3.9v 0.1v step ? excellent line and load regulation. ? high accuracy output voltage of 2%. ? ultra - low ground current at 150 a (typ.) ? thermal and over - current protection. ? short circuit protect ion ? standard sot - 223 and to - 252 package. applicatio ns ? usb removable devices ? mpeg4 devices ? wireless lan?s ? hand - held instrumentation. ? portable dvd players ? digital camera
preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., ? www.seawardinc.com ? page 2 9/4/2012 se 5120 1. 5 a cmos ultra ldo voltage regulator pi n configuration pi n description pin name pin function description gnd groung out output voltage in input voltage functiona l block diagram over - current shor t te mper at ur e protection protection protection circuit over - reference voltage vin gnd vout
preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., ? www.seawardinc.com ? page 3 9/4/2012 se 5120 1. 5 a cmos ultra ldo voltage regulator ord er in g information device marking information package remarks SE5120stxx - lf SE5120stxx - yyww - lf sot - 223 yyww means production batch xx denotes voltage options SE5120sgxx - lf SE5120sgxx - yyww - lf SE5120jtxx - lf SE5120jtxx - yyww - lf to - 252 SE5120jgxx - lf SE5120jgxx - yyww - lf SE5120stxx - hf SE5120stxx - yyww - hf sot - 223 yyww means production batch xx denotes voltage options SE5120sgxx - hf SE5120sgxx - yyww - hf SE5120jtxx - hf SE5120jtxx - yyww - hf to - 252 SE5120jgxx - hf SE5120jgxx - yyww - hf absolut e maximum ratings parameter symbol value units input voltage v in 6 v output voltage range v out - 0.3 to v in v power dissipation p d internally limited (3) output short circuit duration infinite thermal resistance, junction - to - ambient ja 155(sot - 223) c/w 90(to - 252) lead temperature (soldering, 5 sec.) 260 c junction temperature range t j 0 to +150 c storage temperature range t s - 40 to +150 c
preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., ? www.seawardinc.com ? page 4 9/4/2012 se 5120 1. 5 a cmos ultra ldo voltage regulator recommended operating conditions parameter symbol value units supply input voltage range v in 5 v junction temperature range t j 0 to +125 c e lectrica l c haracteristics v in = 5 v; c in = 10 f; c out = 10 f; i out = 10ma; t j = 25c; unless otherwise noted s ymbol parameter t est c onditions m in t yp m ax u nit v out output voltage accuracy SE5120xx12 SE5120xx15 SE5120xx18 SE5120xx25 SE5120xx33 1.176 1.47 1.764 2.45 3.234 1.2 1.5 1.8 2.5 3.3 1.224 1.53 1.836 2.55 3.366 v v out / v out line regulation v in = ( v out + 0.7 ) v to 5.5v -- 0.1 -- %/ v v out / v out load regulation (5) v in = ( v out + 0.7 ) v i out = 10ma to 1 5 00ma -- 2 -- % v out /t output voltage temperature coefficient note 4 -- 0.1 -- mv/ c v in ? v out dropout voltage (6) i out = 1 5 0ma -- 40 -- mv i out = 500ma -- 150 -- i out = 1 0 00ma -- 3 0 0 -- t protection thermal protection thermal protection temperature -- 150 -- c protection hysterisys -- 30 -- i q quiescent current i out = 0ma -- 150 -- a i limit current limit -- 2.5 -- a i short short circuit c urrent vin=vout+1v; vout< 0.4v -- 0.55 -- a 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 temperature) 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 worst case voltage change divided by the total temperature range.
preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., ? www.seawardinc.com ? page 5 9/4/2012 se 5120 1. 5 a cmos ultra ldo voltage regulator 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 0.1ma to 1 2 00ma. changes in output 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 out put voltage dro ps 2% below its nominal value measured at 1v differential.
preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., ? www.seawardinc.com ? page 6 9/4/2012 se 5120 1. 5 a cmos ultra ldo voltage regulator typica l performance characteristics reference voltage vs. temperature 0.7 0.72 0.74 0.76 0.78 0.8 0.82 0.84 30 40 50 60 70 80 90 100 110 120 130 140 150 t ( ) reference voltage v output voltage vs. load current 3.200 3.220 3.240 3.260 3.280 3.300 3.320 3.340 0 0. 1 0. 2 0. 3 0. 4 0. 5 0. 6 0. 7 0. 8 0. 9 1 1. 1 1. 2 1. 3 1. 4 1. 5 1. 6 load current (a) output voltage (v) output voltage vs. input voltage 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.3 3.8 4.3 4.8 5.3 5.8 6.3 input voltage (v) output voltage (v)
preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., ? www.seawardinc.com ? page 7 9/4/2012 se 5120 1. 5 a cmos ultra ldo voltage regulator applications information application hints like any low dropout regulator, se5 1 20 requires external capacitors to ensure stability. the external capacitors must be carefully selected to ensure performance. input capacitor an input capacitor of at least 1 0 f is required. ceramic or tantalum can be used. the value can be increase without upper limit. output capacitor an output capacitor 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 1 0 f but may be increase without limit. thermal considerations it is important that the thermal limit of the package is not exceeded. the se5 1 20 has built - in thermal protection. when the thermal limit 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 fol lowing: the power dissipation (p d ) is p d = i out * [v in ? v out ] the thermal limit of the package is then limited to p d(max) = [t j ? t a ]/ ja where t j is the junction temperature, ta is the ambient temperature, and ja is around 155 c/w sot - 223 for se5 1 20. se5 1 20 is designed to enter thermal protection at 170c. for example, if t a is 25c then the maximum p d is limited to about 0. 94 w. in other words, if i out(max) = 1 2 00ma, then [v in ? v out ] cannot exceed 780 m v.
preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., ? www.seawardinc.com ? page 8 9/4/2012 se 5120 1. 5 a cmos ultra ldo voltage regulator outlin e drawing for sot - 223 outlin e drawing for to - 252
preliminary and all contents are subject to change without prior notice. ? seaward electronics, inc., ? www.seawardinc.com ? page 9 9/4/2012 se 5120 1. 5 a cmos ultra ldo voltage regulator ?? ???? ? ? ??? 22 ???? b ?? 100085 : 0 10- 82895700/1/5 : 0 10- 82895706 seaward electronics corporation ? ? 2f, #181, sec. 3, minquan east rd, taipei, taiwan r.o.c : 886 - 2 - 2712 - 0307 : 886- 2 - 2712 - 0191 seaward electronics incorporated ? 1512 centre pointe dr. milpitas, ca95035, usa : 1 - 408 - 821 - 6600
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