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rev. 10/30/00 advanced spx3819 500 ma, low-noise ldo voltage regulator ( advanced information ) features applications ? ultra-low noise output ldo ? battery powered systems ? 1% initial accuracy at 500ma ? cordless telephones ? very low quiescent current ? radio control systems ? low dropout voltage (300mv at 500ma) ? portable/palm top/notebook computers ? current & thermal limiting ? portable consumer equipment ? reverse-battery protection ? portable instrumentation ? several fix output voltages, 2.5, 3.3, 5.0v & adjustable ? bar code scanners ? zero off-mode current ? smps post-regulator ? packages offered so-8, to-263, sot-223, sot-23 & to-220 ? pin compatible to mic5209 (fixed option only) product description the spx3819 is a low powered positive voltage regulator with ultra low noise output and very low voltage dropout. in addition, this device offers very low quiescent current of approximately 800ua at 100ma output. the spx3819 initial tolerance is less than 1% max with logic compatible on/off switching input. the unique feature of spx3819 includes a reference bypass pin for the best results of low noise. this device is an excellent choice for the use in battery-powered applications such as cordless telephones, radio control syste ms, and portable computers. when disable power consumption drop to nearly zero. this device has a very low output temperature coeffic ient, making it a low power voltage reference. the key features include protection against reversed battery, fold-back current limit ing, and automotive load dump protection. the spx3819 is available in several fixed voltages 2.5v, 3.3v, 5.0v or adjustable output. this device is offered in so-8, 3 an d 5 pin to-263, sot-223, 5-pin sot-23 & 3-pin to-220. these packages offer all the features and adjustable output. marking information pin connections (sot-23 only) to-263-5 package top view 45 spx3819 v out v in en 1) 3) 4) 5) 2) 1 2 3 adj/byp gnd front view to-263-3 package v out gnd v in 1 spx3819 2 3 to-220 front view spx3819 v out gnd v in spx3819 13 2 v out gnd sot-223 front view v in top view 1 2 3 adj/byp v in v out spx3819 en gnd 45 sot-23-5 voltage marking adj a0xx 2.5v a8xx 3.3v a1xx 5.0v a9xx xx production reference code.
rev. 10/30/00 spx3819 absolute maximum ratings recommended operating conditions power dissipation...................................... internally limited input voltage....................................... ........... +2.5v to+16v lead temp. (soldering, 5 seconds) ............................ 260 c operating junction temperature range ..... -40 c to +125 c operating junction temperature range ..... -40 c to +125 c enable input voltage............................................. 0v to v in input supply voltage........................................-20v to +20v enable input voltage........................................-20v to +20v electrical characteristics t j = 25 c, v out + 1v, i l = 100 a, c l = 1 f, and v enable > 2.4v. unless otherwise specified boldface applies over the junction temperature range parameter test conditions typ min max units output voltage tolerance i l = 100 a i l = 500 a -1 -2 +1 +2 % output voltage temperature coef. ( ? v/ ? t) 57 ppm/ c line regulation ( ? v/v) v in = v out + 1v to 16v 0.04 0.1 %/v load regulation ( ? v/v) i l = 0.1ma to 500ma 0.05 0.2 % i l = 100 a 10 60 80 i l = 50 ma 125 175 250 i l = 150 ma 180 350 450 dropout voltage (v in - v o ) i l = 500 ma 340 550 700 mv quiescent current (i gnd ) v enable < 0.6v v enable < 0.25v 0.05 0.10 3 8 a i l = 100 a 110 150 190 i l = 50 ma 360 650 900 i l = 150 ma 1.3 2.0 2.5 ground pin current (i gnd ) i l = 500 ma 13.0 25.0 30.0 ripple rejection (psrr) 55 db current limit (i limit ) v out = 0v 800 950 ma output noise (e no ) i l = 50ma, c l = 1.0 f (10hz ? 100khz) 390 v rms off 0.6 v input voltage level logic low (v il ) input voltage level logic high (v ih ) on 2 v enable input current v il < 0.6v v ih > 2.0v 0.01 2 2 20 junction to tab 3.0 to-220 junction to ambient 60 junction to tab 3.0 dd package junction to ambient 60 junction to tab 15 sot-223 junction to ambient 156 junction to tab n/a sot-23-5 junction to ambient 220 junction to tab n/a thermal resistance so-8 junction to ambient 180 c/w a ma
rev. 10/30/00 spx3819 typical application + + gnd en v in v out byp (optn.) enable may be tied directly to v in spx3819 1 2 3 4 5
rev. 10/30/00 spx3819 ground current vs. input voltage 60 70 80 90 100 110 120 130 140 150 160 4 6 8 10121416 vin (v) i gnd (ua) 3.3v device il = 100ua cl = 1.0uf ground current vs. load current (in dropout) 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 0 100 200 300 400 500 il (ma) i gnd (ma) 3.3v device vin = 4.3v cl = 1.0uf output voltage vs. input voltage 3.290 3.295 3.300 3.305 3.310 3.315 3.320 3.325 3.330 3.335 3.340 3.345 3.350 4 6 8 10121416 vin (v) vout (v) 3.3v device il = 100ua cl = 1.0uf dropout voltage vs. load current 0 50 100 150 200 250 300 350 0 100 200 300 400 500 il (ma) dropout (mv) 3.3v device vin = 3.2v cl = 1.0uf output voltage vs. load current 3.300 3.302 3.304 3.306 3.308 3.310 3.312 3.314 3.316 0 100 200 300 400 500 il (ma) vout (v) 3.3v device vin = 4.3v cl = 1.0uf ground current vs. load current 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 0 100 200 300 400 500 il (ma) i gnd (ma) 3.3v device vin = 4.3v cl = 1.0uf
rev. 10/30/00 spx3819 ground current vs. temperature 70 80 90 100 110 120 130 -40-20 0 20406080100120 temperature (degree c) i gnd (ua) 3.3v device vin = 4.3v cl = 1.0uf il = 100ua ground current vs. temperature 6.0 6.5 7.0 7.5 8.0 -40 -20 0 20 40 60 80 100 120 temperature (degree c) i gnd (ma) 3.3v device vin = 4.3v cl = 1.0uf il = 500ma ground current in dropout vs. temperature 10.5 11.0 11.5 12.0 12.5 13.0 13.5 14.0 -40-20 0 20406080100120 temperature (degree c) i gnd (ma) 3.3v device vin = 4.3v cl = 1.0uf il = 500ma enable voltage (on threshold) vs. input voltage 1.00 1.05 1.10 1.15 1.20 1.25 1.30 4 6 8 10121416 vin (v) ven, on threshold (v) 3.3v device cl =1.0uf il = 100ua ground current vs. temperature 200 220 240 260 280 300 320 340 360 -40 -20 0 20 40 60 80 100 120 temperature (degree c) i gnd (ua) 3.3v device vin = 4.3 cl = 1.0uf il = 50 ma output voltage vs. temperature 3.200 3.220 3.240 3.260 3.280 3.300 3.320 3.340 3.360 3.380 3.400 -40 -20 0 20 40 60 80 100 120 temperature (degree c) vout (v) 3.3v device vin = 4.3v cl = 1.0uf il = 500ua
rev. 10/30/00 spx3819
rev. 10/30/00 v out gnd spx3819 top view en byp (optn) v in + + fig. 1 1 2 3 5 4 hi-on lo-off sot-23 spx3819 application hints the spx3819 requires an output capacitor for device stability. the value required varies greatly depending upon the application circuit. the high frequency characteristics of electrolytic capacitors depend greatly on the type and also on the manufacturer. sometimes bench testing is the only means to determine the proper capacitor type and value. the high quality 2.2 f aluminum electrolytic capacitor covers all general application circuits; this stability can be obtained with a tantalum electrolytic value of 1 f. in general, linear regulator stability decreases with higher output currents. in most applications the spx3819 is operating at few milliamps. in these applications the output 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 150ma. with the spx3819 adjustable regulator, the minimum value of output capacitance is a function of the output voltage. the value decreases with higher output voltages, since the closed loop gain is increased. typical applications circuits the spx3819 provides access to the internal reference. a 10 f capacitor on the ref byp pin will provide a significant reduction in output noise. this pin may be left unconnected if the output noise is not a major concern. the spx3819 start-up speed is inve rsely proportional to the size of its capacitor. applications requiring a slow ramp-up of output voltage should consider larger valu es of c byp . if the rapid turn-on is necessary, omit bypass capacitor. figure 1 shows spx3819 standard application circuit. the en (enable) pin is pulled high (>2.0v) to enable the regulator. to d isable the regulator, en < 0.6v. the spx3819 in figure 2 shows adjustable output voltage configuration. two resistors set the output voltage. the formula for output voltage is: resistor values are not critical as the adj pin has high input impedance, for best results use resistors of 47k ? or less. a capacitor for adj to ground will provide improved noise performance. r2 v in v out gnd top view en byp (optn) + + adj r1 r2 fig. 2 hi-on lo-off 1 2 3 4 5 spx3819 sot-23 v out = 1.235v x 1 + r1
rev. 10/30/00 spx3819 package drawing soic-8 (s) pin 1 1.27 (0.50) bsc 3.8 (0.150) 4.0 (0.158) 4.6 (0.181) 5.2 (0.205) 5.8 (0.228) 6.2 (0.244) 4.8 (0.188) 5.0 (0.197) 0.49 (0.019) 0.56 (0.022) 0.35 (0.014) 0.45 (0.018) 0.10 (0.004) 0.20 (0.008) 0.19 (0.007) 0.22 (0.009) 1.35 (0.053) 1.75 (0.069) 0.61 (0.024) 0.78 (0.031) 3 -6 0.64 (0.025) 0.77 (0.030) 45 7 (4 plcs) 7 (4 plcs) 0.37 (0.015) bsc
rev. 10/30/00 spx3819 package drawing to-263-3l (t) 0.103 bsc 0.050 (1.270) 0.600 + - 0.025 0.405 0.005 0.055 (1.397) (10.287 0.127) 0.356 0.005 (9.042 0.127) (15.24 0.635) (2.616) 0.032 + - 0.001 (0.813 0.025) + - 0.176 0.005 0.050 0.002 0.015 + - 0.003 0 8 (0.381 0.074) + - 0.100 0.010 (2.540 0.254) (4.470 0.127) (1.270 0.051)
rev. 10/30/00 spx3819 package drawing to-263-5l (t) 0.405 0.005 0.055 (1.397) 0.356 0.005 (10.287 0.127) (9.042 0.127) (15.24 0.635) 0.600 0.025 (1.702 0.127) 0.067 0.005 (0.813 0.076) 0.032 0.003 0 8 0.176 0.005 (4.470 0.127) 0.050 0.002 (1.270 0.051) 0.100 0.010 (2.540 0.254) 0.015 0.003 (0.381 0.074)
rev. 10/30/00 spx3819 package drawing sot-223-3l (m3) 0.116 0.124 0.146 0.130 0.295 0.264 0.041 0.033 0.0905 nom 0.181 nom 0.264 0.248 0.0040 0.0008 0.033 0.025 0.067 0.028 10 c max 0.014 0.010 10 c 16 c 10 c 16 c
rev. 10/30/00 spx3819 package drawing sot-23-5l (m5) millimeters symbol 0 0.90 0.30 0.80 ref 2.70 0.10 1.40 1.70 0.95 bsc. min 0.2 2.50 min. max min. max. a a1 a2 b c d e e e1 h l 0 .035 .012 .0315 ref .106 .004 .055 .066 .037 bsc. min .0078 .098 0.10 1.30 0.50 3.10 0.35 1.80 2.10 3.00 .004 .051 .019 .122 .0137 .071 .082 .118 inches note: 1. refer to applicable 2. controlling dimention : millimeter 3. package surface finishing to be smooth finish. l a1 c a2 a d b (5 places) h e e1 e
rev. 10/30/00 spx3819 package drawing to-220-3l (u) 0.408 0.013 (10.36 0.33) 0.110 0.010 (2.794 0.254) 0.250 0.010 (6.350 0.254) 0.151d 0.002 (3.835 d 0.051) 0.180 0.005 (4.572 0.127) 0.050 0.002 (1.270 0.051) 0.340 0.010 (8.636 0.254) 0.150 min (3.81 min) 0.410 (10.41) 0.100 0.010 (2.540 0.254) 0.032 0.005 (0.813 0.127) 0.540 0.015 (13.720 0.381) 0.050 typ (1.27 typ) 0.200 0.010 (5.080 0.254) 0.015 0.010/-0.002 (0.381 0.254/-0.051) 0.015 0.010/-0.015 (2.667 0.254/-0.381) 1.020 0.015 (25.910 0.381) seating plane tapered 1 o 2 sides 7 o typ.
rev. 10/30/00 spx3819 ordering information ordering no. output voltage packages spx3819s adj 8 lead soic spx3819s-2.5 2.5v 8 lead soic spx3819s-3.3 3.3v 8 lead soic spx3819s-5.0 5.0v 8 lead soic spx3819t adj 3 lead to-263 spx3819t-2.5 2.5v 3 lead to-263 spx3819t-3.3 3.3v 3 lead to-263 spx3819t-5.0 3.0v 3 lead to-263 spx3819t5 adj 5 lead to-263 spx3819t5-2.5 2.5v 5 lead to-263 spx3819t5-3.3 3.3v 5 lead to-263 spx3819t5-5.0 5.0v 5 lead to-263 spx3819m3 adj 3 lead sot-223 spx3819m3-2.5 2.5v 3 lead sot-223 spx3819m3-3.3 3.3v 3 lead sot-223 spx3819m3-5.0 5.0v 3 lead sot-223 spx3819m5 adj 5 lead sot-23 spx3819m5-2.5 2.5v 5 lead sot-23 spx3819m5-3.3 3.3v 5 lead sot-23 spx3819m5-5.0 5.0v 5 lead sot-23 spx3819u adj 3 lead sot-220 spx3819u-2.5 2.5v 3 lead sot-220 spx3819u-3.3 3.3v 3 lead sot-220 spx3819u-5.0 5.0v 3 lead sot-220 signal processing excellence sipex corporation headquarters and main offices: 22 linnell circle billerica, ma 01821 tel: (978) 667-8700 fax: (978) 670-9001 e-mail: sales@sipex.com 233 south hillview drive milpitas, ca 95035 tel: (408) 935-7600 fax: (408) 934-7500 sipex corporation reserves the right to make changes to any products described herein. sipex does not assume any liab ility arising out of the application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others. corporation

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