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1 date: 5/25/04 spx1202 600ma low dropout positive linear regulator ?copyrig ht 2004 sipex corporation 600ma low dropout linear regulator spx1202 description features guaranteed 600ma output three terminal adjustable or fixed 2.5v, 3v and 3.3v low quiescent current low dropout voltage of 1.1v at full load 0.2% line and 0.3% load regulation voltage temperature stability 0.05% overcurrent and thermal protection available packages: sot-223,to-252, to-220, and to-263 the spx1202 is a low power positive-voltage regulator designed to satisfy moderate power requirements with a cost effective, small footprint solution. this device is an excellent choice for use in battery-powered applications and portable computers. the spx1202 features very low quiescent current and a low dropout voltage of 1.1v at a full load. as output current decreases, quiescent current flows into the load, increasing efficiency. spx1202 is available in adjustable or fixed 2.5v, 3v and 3.3v output voltages. the spx1202 is offered in several 3-pin surface mount packages: sot-223, to-252, to-220 and to-263. an output capacitor of 10 f provides unconditional stability while a smaller 2.2 f capacitor is sufficient for most applications. applications scsi-ii active terminator portable/ palm top / notebook computers battery chargers disk drives portable consumer equipment portable instrumentation smps post-regulator block diagram + - current limit i cl i tl thermal limit v ref amp v out v in adj/gnd i adj ~ 50 a now available in lead free packaging refer to page 6 for pinouts.
2 date: 5/25/04 spx1202 600ma low dropout positive linear regulator ?copyrig ht 2004 sipex corporation at v in =v out + 1.5v, t a = 25 c, c in = c out = 10 f, unless otherwise specified. limits in boldface applies over the full operating temperature range. parameter conditions typ min max units 2.5v version output voltage i out = 10ma, v in = 5.00v 2.475 2.500 2.525 v 0 i out 600ma, 4.50v v in 10v 2.450 2.550 3.0v version output voltage i out = 10ma, v in = 5.00v 2.970 3.000 3.030 v 0 i out 600ma, 4.50v v in 10v 2.940 3.060 3.3v version output voltage i out = 10ma, v in = 5.00v 3.267 3.300 3.333 v 0 i out 600ma, 4.50v v in 10v 3.234 3.366 all output options reference voltage i out =10ma, (v in - v out ) = 2v 1.238 1.250 1.262 v 10 i out 600ma, 1.4v (v in -v out ) 10v 1.225 1.270 output voltage (note 1) 0.05 % temperature stability line regulation 4.50v v in 12v,v out =3.00,i out =0 1.00 7.00 mv 4.80v v in 12v,v out =3.30,i out =0 1.00 7.00 6.50v v in 12v,v out =5.00,i out =0 1.00 10.00 load regulation 0 i out 600ma,v in =4.50v,v out =3.00 1.00 12.00 mv 0 i out 600ma,v in =4.80v,v out =3.30 1.00 12.00 0 i out 600ma,v in =6.50v,v out =5.0 1.00 15.00 dropout voltage i l =100ma 1.00 1.10 v (note 2) i l =600ma 1.05 1.15 quiescent current 4.25v v in 6.5v 5.00 10.00 ma adjust pin current 50 a current limit (v in -v out )=5v .850 1.0 a thermal regulation 25 c, 30ms pulse 0.01 0.1 %/w ripple rejection f ripple =120hz, (v in -v out )=3v, 60 75 db v ripple =1v pp long term stability 125 c, 1000hrs 0.03 % rms output noise % of v out , 10hz f 10khz 0.003 % thermal resistance junction to case, at tab 15 c/w absolute maximum ratings power dissipation ...................................... internally limited lead temperature (soldering, 5 seconds) .................. 260 c storage temperature range ...................... -65 c to +150 c notes: note 1: output temperature coefficient is defined as the worst case voltage change divided by the total temperature range. note 2: dropout voltage is defined as the input to output differential at which the output voltage drops 100mv below its nomin al value measured at 1v differential at very low values of programmed output voltage, the minimum input supply voltage of 2v ( 2.3v over temperature) must be taken int o account. note 3: thermal regulation is defined as the change in output voltage at a time t after a change in power dissipation is appl ied excluding load or line regulation effect. operating junction temperature range ..... -40 c to +125 c input supply voltage ..................................................... +20v esd rating .............................................................. 2kv min electrical characteristics
3 date: 5/25/04 spx1202 600ma low dropout positive linear regulator ?copyrig ht 2004 sipex corporation typical performance characteristics figure 1. load regulation for spx1202m3-3.3; figure 2. line regulation for spx1202m3-3.3; v in =4.8v, c out =2.2 fv in =4.8v to 16v, c out =2.2 f figure 3. dropout voltage vs output current for spx1202m3-3.3; v in =4.89v, c out =2.2 f figure 5. current limit for spx1202m3-3.3, output voltage deviation with i out =10ma to 1a step. 3.300 3.310 3.320 3.330 4.8 9.8 14.8 vin (v) v out (v) series 1 series 2 line regulation at 25 c 0.9 1.0 1.1 1.2 1.3 100 200 300 400 500 600 700 800 900 1000 output current (ma) dropout voltage (v) figure 6. v out vs temperature i out pilsed from 10ma to current limit figure 4. current limit for sp1202m3-3.3; v in =4.8v, c in =c out =1.0 f, i out pulsed from 10ma to current limit t emp ( c) -50 -25 0 25 50 75 100 125 2.00 1.50 1.00 0.50 0.00 series 1 series 2 current limit (a) current limit vs temp t emp ( c) -50 -30 -10 10 30 50 70 90 110 130 3.340 2.320 3.300 3.280 3.260 3.240 v out (v) series 1 series 2 3.280 3.285 3.290 3.295 3.300 3.305 3.310 3.315 3.320 10 100 1000 output current (ma) output voltage (v) scope tracing missing
4 date: 5/25/04 spx1202 600ma low dropout positive linear regulator ?copyrig ht 2004 sipex corporation application information output capacitor to ensure the stability of the spx1202, an output capacitor of at least 10 f (tantalum or ceramic)or 50 f (aluminum) is required. the value may change based on the application requirements of the output load or temperature range. the value of esr can vary based on the type of capacitor used in the applications. the recommended value for esr is 0.5 ? or less. a larger value of output capacitance (up to 100 f) can improve the load transient response. soldering methods the spx1202 sot-223 package is designed to be compatible with infrared reflow or vapor- phase reflow soldering techniques. during sol- dering, the non-active or mildly active fluxes may be used. the spx1202 die is attached to the heatsink lead which exits opposite the input, output, and ground pins. hand soldering and wave soldering should be avoided since these methods can cause damage to the device with excessive thermal gradients on the package. the sot-223 recommended soldering method are as follows: vapor phase reflow and infrared reflow with the component preheated to within 65 c of the soldering tem- perature range thermal characteristics the thermal resistance of spx1202 depends on the type of package and pc board layout as shown in table 1. the spx1202 features the internal thermal limiting to protect the device during overload conditions. special care needs to be taken during continuous load conditions such that the maximum junction temperature does not exceed 125 c. thermal protection is activated at >144 c and deactiviated at <137 c. taking the fr-4 printed circuit board and 1/16 thick with 1 ounce copper foil as an experiment, the pcb material is effective at transmitting heat with the tab attached to the pad area and a ground plane layer on the backside of the sub- strate. refer to table 1 for the results of the experiment. the thermal interaction from other components in the application can effect the thermal resis- tance of the spx1202. the actual thermal resis- tance can be determined with experimentation. spx1202 power dissipation is calculated as follows: p d = (v in - v out )(i out ) maximum junction temperature range: t j = t ambient (max) + p d * (thermal resistance) (junction-to-ambient) maximum junction temperature must not ex- ceed the 125 c. ripple rejection ripple rejection can be improved by adding a capacitor between the adj pin and ground as shown in figure 7. when adj pin bypassing is used, the value of the output capacitor required increases to its maximum. if the adj pin is not bypassed, the value of the output capacitor can be lowered to 10 f for an electrolytic aluminum capacitor or 2.2 f for a solid tantalum capacitor (fig 10). however the value of the adj-bypass capacitor should be chosen with respect to the following equation: c = 1 / ( 6.28 * f r * r 1 ) where c = value of the capacitor in farads (select an equal or larger standard value), f r = ripple frequency in hz, r 1 = value of resistor r 1 in ohms. if an adj-bypass capacitor is used, the ampli- figure 7. substrate layout for sot-223 50 x 50mm 35 x 17mm 16 x 10mm
5 date: 5/25/04 spx1202 600ma low dropout positive linear regulator ?copyrig ht 2004 sipex corporation pc board topside copper backside copper thermal resistance area mm 2 area mm 2 area mm 2 junction to ambient c/w 2500 2500 2500 46 2500 1250 2500 47 2500 950 2500 49 2500 2500 0 51 2500 1800 0 53 1600 600 1600 55 2500 1250 0 58 2500 915 0 59 1600 600 0 67 900 240 900 72 900 240 0 85 figure 8. 600ma current source figure 9. typical adjustable regulator load adj spx1202 v in c 1 out in 4.7 f c 2 i out r 1 v ref r 1 i out = + in out i adj spx1202 c 1 r 1 r 2 v out v in c 2 v out =v ref (1+r 2 /r 1 ) +i adj r 2 v ref 50 a adj 4.7 f + tude of the output ripple will be independent of the output voltage. if an adj-bypass capacitor is not used, the output ripple will be proportional to the ratio of the output voltage to the reference voltage: m = v out / v ref where m = multiplier for the ripple seen when the adj pin is optimally bypassed. v ref =1.25v output voltage the output of the adjustable regulator can be set to any voltage between 1.25v and 15v. the value of v out can be quickly approximated using the formula. (figure 9) v out =1.25 *(r 1 + r 2 )/r 1 . a small correction to this formula is required depending on the values of resistors r1 and r2, since adjustable pin current (approx 50 a) flows through r2. when i adj is taken into account, the formula becomes v out = v ref (1+ (r 2 /r 1 )) + i adj * r 2 , where v ref =1.25v. typical applications table 1
6 date: 5/25/04 spx1202 600ma low dropout positive linear regulator ?copyrig ht 2004 sipex corporation package pinouts 13 2 sot-223 (m3) t op view to -263-3 (t) 1 2 3 f ront view to -220-3 (u) 1 23 f ront view t o-252 (r) adj/gnd v out 1 23 v in adj/gnd v out v in adj/gnd v out v in adj/gnd v out v in t op view figure 11. 5v regulator with shutdown spx1202 v in r 1 r 2 10 f 10 f* 1k ? , 330 ? 1% + + 4.7 f c 1 *c 1 improves ripple rejection. z c should be ~ r1 at ripple frequency 5v adj in out (note a) v out note a: v in(min) = (intended v out ) + (v dropout (max) ) 1% spx1202 v in 10 f 1 k ? 1% 330 ? 1% + + 4.7 f 5v adj in out (note a) 1k 1k ttl input 2n3904 dropout (max) note a: v in(min) = (intended v out ) + (v ) figure 10. improving ripple rejection figure 12. recommended connections for best results spx1202 v in r 2 r 1 connect r 2 to load r l connect r 1 to case of regulator r p parasitic line resistance v out adj layout considerations parasitic line resistance can degrade load regulation. in order not to affect the behavior of the regulator, it is best to connect r 1 to the case as illustrated in figure 12. for the same reason, r 2 should be connected to the negative side of the load.
7 date: 5/25/04 spx1202 600ma low dropout positive linear regulator ?copyrig ht 2004 sipex corporation 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 package: 3 pin sot-223
8 date: 5/25/04 spx1202 600ma low dropout positive linear regulator ?copyrig ht 2004 sipex corporation e1 e1/2 d1 dimensions in inches 3 pin to-252 jedec to-252 (aa) variation .018 - .024 c min nom max a1 - - .005 d1 .205 - - e1 h l l1 l2 .370 - .410 .170 - - .055 .060 .070 .108 ref .020 bsc c with plating base metal b contact area seating plane c a1 (l1) l c c gauge plane o l2 3 pin to-252 package: 3 pin to-252
9 date: 5/25/04 spx1202 600ma low dropout positive linear regulator ?copyrig ht 2004 sipex corporation h1 b seating plane a1 a chamfer optional c a2 a a e ? q d d1 e2 e/2 l l1 c c d d b c with plating base metal b contact area 1 e e1 .140 - .190 .020 - .055 dimensions in (mm) 3 pin to-220 jedec to-220 (ab) variation .080 - .115 .015 .027 .040 .045 - .070 .480 - .507 a a1 a2 b b2 d1 d2 .380 - .420 e min nom max c .014 - .024 d .560 - .650 .330 - .355 e1 .270 - .350 e2 - - .030 e .100 bsc e1 .200 bsc h1 .230 - .270 l1 - - .250 l2 - - - ? p .139 - .161 q .100 - .135 3 pin to-220 package: 3 pin to-220
10 date: 5/25/04 spx1202 600ma low dropout positive linear regulator ?copyrig ht 2004 sipex corporation e d l1 b2 e b .160 - .190 .000 - .010 dimensions in inches 3-pin to-263 jedec to-263 (aa) variation .020 - .039 .015 - .029 .070 - .110 - - - a a1 b c d e e1 l l1 l2 min nom max e .100 bsc .066 - .330 - .380 d1 .270 - - .380 - .420 .245 - - h .575 - .625 .070 l3 .010 bsc 123 c c2 a h seating plane l 0?8 see view c e/2 v iew c gauge plane a1 seating plane c with plating base metal b section b-b b b 3 pin to-263 package: 3 pin to-263
11 date: 5/25/04 spx1202 600ma low dropout positive linear regulator ?copyrig ht 2004 sipex corporation corporation analog excellence sipex corporation headquarters 233 south hillview drive milpitas, ca 95035 tel: (408) 934-7500 fax: (408) 935-7600 part number acc. output voltage package spx1202u 1% adj 3 pin to220 spx1202u-2.5 1% 2.5v 3 pin to220 spx1202u-3.0 1% 3.0v 3 pin to220 spx1202u-3.3 1% 3.3v 3 pin to220 spx1202t 1% adj 3 pin to-263 spx1202t/tr 1% adj 3 pin to-263 spx1202t-2.5 1% 2.5v 3 pin to-263 spx1202t-2.5/tr 1% 2.5v 3 pin to-263 spx1202t-3.0 1% 3.0v 3 pin to-263 spx1202t-3.0/tr 1% 3.0v 3 pin to-263 spx1202t-3.3 1% 3.3v 3 pin to-263 spx1202t-3.3/tr 1% 3.3v 3 pin to-263 spx1202m3 1% adj 3 pin sot-223 spx1202m3/tr 1% adj 3 pin sot-223 spx1202m3-2.5 1% 2.5v 3 pin sot-223 spx1202m3-2.5/tr 1% 2.5v 3 pin sot-223 spx1202m3-3.0 1% 3.0v 3 pin sot-223 spx1202m3-3.0/tr 1% 3.0v 3 pin sot-223 spx1202m3-3.3 1% 3.3v 3 pin sot-223 spx1202m3-3.3/tr 1% 3.3v 3 pin sot-223 spx1202r 1% adj 3 pin to-252 spx1202r/tr 1% adj 3 pin to-252 spx1202r-2.5 1% 2.5v 3 pin to-252 spx1202r-2.5/tr 1% 2.5v 3 pin to-252 spx1202r-3.0 1% 3.0v 3 pin to-252 spx1202r-3.0/tr 1% 3.0v 3 pin to-252 spx1202r-3.3 1% 3.3v 3 pin to-252 spx1202r-3.3/tr 1% 3.3v 3 pin to-252 ordering information available in lead free packaging. to order add "-l" suffix to part number. example: spx1587at-5.0/tr = standard; spx1587at-5.0-l/tr = lead free /tr = tape and reel pack quantity is 500 for to-263, 2,000 for to-252 and 2,500 for sot-223.

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