1 date: 5/27/04 spx2808 300ma low dropout voltage regulator ? copyright 2004 sipex corporation 300ma low dropout voltage regulator spx2808 description features 3.3v and 3.5v versions input-output differential is 0.35v at 200ma input-output differential is 0.45v at 300ma mirror-image insertion protection internal thermal protection available in sot-223 and sot-89 packages short circuit protection 2% output accurancy, spx2808a ? the spx2808 is a low power, positive voltage regulator. this device is an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable computers. the spx2808 features offers very low quiescent currents (0.4ma), and very low drop output voltage (50mv at light load and 450mv at 300ma). the spx2808 is offered in a 3-pin sot-223 and sot-89 package. applications cd-roms scanners radio control systems typical applications circuit spx2808 v in c 1 v out 1 f 100 f, esr 0.05 to 0.6 ohms gnd portable instrumentation cordless telephones usbs toys sot-89 (m1) t op view 1 v in 2 gnd 3 v out 1 v in 2 gnd 3 v out sot-223 (m3) now available in lead free packaging
2 date: 5/27/04 spx2808 300ma low dropout voltage regulator ? copyright 2004 sipex corporation parameter conditions min typ max min typ max units 3.3v version sp2808a sp2808 quiescent current (i q )i out = 0ma, except i cont 100 200 100 200 a output voltage (v out )i out = 50ma, except i cont v in = 8v, at output off 3.24 3.3 3.36 3.20 3.3 3.40 v line regulation i out = 40ma, 5 v in 10v 0.3 0.4 0.3 0.4 %/v load regulation i out = 1ma 60ma 10 40 10 40 mv i out = 1ma 100ma 30 80 30 80 mv dropout voltage (v drop )i out = 60ma 0.2 0.3 0.2 0.3 v i out = 200ma 0.35 0.7 0.35 0.7 v i out = 300ma 0.45 0.45 v continuous output i out when v out drops 0.3v 400 400 ma current (i out ) from v o (typ)(note 3) temperature coefficient 100 100 ppm/ c pulse output current 5 ms pulse, 12.5% duty cycle 300 300 ma 3.5v version quiescent current (i q )i out = 0ma, except i cont 100 200 100 200 a output voltage (v out )i out = 50ma, except i cont v in = 8v, at output off 3.43 3.5 3.57 3.40 3.5 3.60 v line regulation i out = 40ma, 5 v in 10v 0.3 0.4 0.3 0.4 %/v load regulation i out = 1ma 60ma 10 40 10 40 mv i out = 1ma 100ma 30 80 30 80 mv dropout voltage (v drop )i out = 60ma 0.2 0.3 0.2 0.3 v i out = 200ma 0.35 0.7 0.35 0.7 v i out = 300ma 0.45 0.45 v continuous output i out when v out drops 0.3v 400 400 ma current (i out ) from v o (typ)(note 3) temperature coefficient 100 100 ppm/ c pulse output current 5 ms pulse, 12.5% duty cycle 300 300 ma absolute maximum ratings power dissipation (note 3) ........................................ internally limited lead temp (soldering, 5 seconds) ............................................ 260 c storage temperature range ..................................... -65 c to +150 c input supply voltage range .......................................... -0.3v to +30v esd rating (note 4) ...................................................................... 2kv notes: note 1: when mounted as recommended. derate 11mw/ c for sot-89 packages when ambient temperatures are over 25 c. note 2: see typical applications notes to ensure constant junction temperature, low duty cycle pulse testing used. note 3: all limits are at 25 c; boldface limits are over the full operating junction temperature range of -40 c to +85 c. note 4: the maximum power dissipation is a function of maximum junction temperature, total thermal resistance, and ambient temp erature. note 5: human body model, 100pf discharged through 1.5k ? . at t a =25 c, unless otherwise specified. (note 1) recommended operating consitions input supply voltage range ............................................. 3.0v to 26v operating junction temperature range ....................... -40 c to 85 c sot-89 ja ............................................................................. 90 c/w sot-223 ................................................................................. 60 c/w electrical characteristics
3 date: 5/27/04 spx2808 300ma low dropout voltage regulator ? copyright 2004 sipex corporation typical performance characteristics figure 1. peak output current figure 2. minimum power dissipation (sot-89) output current (ma) 800 500 0 input voltage (v) 200 100 10 20 300 400 30 0 t j = 25? t j = 85? t j = -40? 0.0 010 20 40 70 80 ambient temperature (?) power dissipation (w) 30 50 60 90 0.4 0.8 1.2 1.6 2.0 the spx2808 requires an output capacitor for device stability. the value required varies greatly depending upon the application circuit and other factors. the high frequency characteristics of electrolytic capacitors depend greatly on the type and also on the manufacturer. sometimes only bench testing is the only means to deter- mine the proper capacitor type and value. the high quality 100 f aluminum electrolytic cov- ers all general application circuits, this stability can be obtained with a tantalum electrolytic value of 47 f. another critical point of electrolytic character- istics is its performance over temperature. the spx2808 is designed to operate starting at - 40 c which may not be true in the case of electrolytic. higher temperatures generally no problem. the electrolytic. type in aluminum will freeze around -30 c. this could cause an oscillation at output of regulator. at a lower temperature requirement by many applications the capacitor should maintain its performance. so as a result, for an application which regulator junction temperature does not exceed 25 c, the output capacitor can be reduced by the factor of two over the value needed for the entire tem- perature range. in most applications the spx2808 is operating at few milliamps. in these applications the out- put capacitance can be further reduced. for example, when the regulator is running at 10ma output current the output capacitance value is half compared to the same regulator that is running at 100ma. the value decreases with higher output voltages, since the internal loop gain is reduced. the worst case occurs at the lower temperature and maximum operating currents, the entire circuit and the electrolytic, should be cooled down to the minimum temperature. the mini- mum of 0.6 volts required at the input of regula- tor above the output to keep the power dissipa- tion and die heating to its minimum. after the value for the capacitor has been determined for actual use, the value should be doubled. application information
4 date: 5/27/04 spx2808 300ma low dropout voltage regulator ? copyright 2004 sipex corporation package: 3 pin sot-89 h e e e1 d d1 1 2 3 1.40 1.50 1.60 dimensions in (mm) 3 pin sot-89 0.36 0.42 0.48 4.40 4.50 4.60 a b1 c d h e l min nom max 1.40 1.60 1.75 3.94 - 4.25 e e1 1.0 c 5o(2x) bb1 b ro.15 8o(2x) b 0.41 0.47 0.53 0.38 0.40 0.43 d1 1.45 1.50 1.55 2.90 3.00 3.10 2.40 2.50 2.60 0.80 - 1.20 l 3 pin sot-89
5 date: 5/27/04 spx2808 300ma low dropout voltage regulator ? copyright 2004 sipex corporation package: 3 pin sot-223 see detail a c b2 c gauge plane seating plane h a a1 l c 0 e d 1 e e1 c c n b b b2 b section c-c - - 1.80 0.02 - 0.10 dimensions in (mm) 3 pin sot-223 jedec to-261 (aa) variation 6.50 6.70 7.00 7.30 a a1 d e e1 e l min nom max c 0.23 0.30 0.35 6.30 6.70 0 - 10 a2 1.50 1.60 1.70 0.66 0.76 0.84 b b2 2.90 3.00 3.10 3.30 3.50 3.70 2.30 basic e1 4.60 basic 0.75 - - c with plating base metal b section b-b 3 pin sot-223
6 date: 5/27/04 spx2808 300ma low dropout voltage regulator ? copyright 2004 sipex corporation part number accuracy output voltage package spx2808am1-3.3 2% 3.3v 3 lead sot-89 spx2808am1-3.3/tr 2% 3.3v 3 lead sot-89 spx2808am1-3.5 2% 3.5v 3 lead sot-89 spx2808am1-3.5/tr 2% 3.5v 3 lead sot-89 spx2808m1-3.3 3% 3.3v 3 lead sot-89 spx2808m1-3.3/tr 3% 3.3v 3 lead sot-89 spx2808m1-3.5 3% 3.5v 3 lead sot-89 spx2808m1-3.5/tr 3% 3.5v 3 lead sot-89 spx2808am3-3.3 2% 3.3v 3 lead sot-223 spx2808am3-3.3/tr 2% 3.3v 3 lead sot-223 spx2808am3-3.5 2% 3.5v 3 lead sot-223 spx2808am3-3.5/tr 2% 3.5v 3 lead sot-223 spx2808m3-3.3 3% 3.3v 3 lead sot-223 spx2808m3-3.3/tr 3% 3.3v 3 lead sot-223 spx2808m3-3.5 3% 3.5v 3 lead sot-223 spx2808m3-3.5/tr 3% 3.5v 3 lead sot-223 corporation analog excellence sipex corporation reserves the right to make changes to any products described herein. sipex does not assume any liability aris ing out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor t he rights of others. sipex corporation headquarters and sales office 233 south hillview drive milpitas, ca 95035 tel: (408) 934-7500 fax: (408) 935-7600 ordering information available in lead free packaging. to order add ?-l? suffix to part number. example: spx2808m3-3.5/tr = standard; spx2808m3-l-3.5/tr = lead free /tr = tape and reel pack quantity is 2,500 for sot-89 and sot-223.
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