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1 date: 12/9/05 spx2954, 250ma low dropout voltage regulator ?copyright 2005 sipex corporation 250ma low dropout voltage regulator spx2954 description features 5.0v and 3.3v versions at 250ma output accurate 0.5% for spx2954a very low quiescent current low dropout: 310mv at 250ma extremely tight load and line regulation very low temperature coefficient current and thermal limiting need only 1 f for stability direct replacement for lp2954 offered in to-92, to-263, sot-223, & to-220; also soic --8 pin versions only error flag warns of output dropout logic-controlled electronic shutdown programmable output from 1.24v to 30v the spx2954 and spx2954a are low power voltage regulators. these devices are an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable computers. the spx2954 and spx2954a feature low quiescent current and low dropout voltage (typ. 20mv at 100 a and 310mv at 250ma). this includes a tight initial tolerance (0.5% for spx2954a), extremely good load and line regulation (0.05% typ.), and very low output temperature coefficient (20 ppm/ c typ.), making the spx2954/spx2954a useful as a low-power voltage reference. the error flag output feature is used as a power-on reset for warning of a low output voltage, due to a falling input voltage. the logic-compatible shutdown feature enables the regulator to be switched on and off. the spx2954/spx2954a is offered in 3-pin to-92, to-263, sot-223 and to-220 packages, and 8 pin soic package. 100k output error error ______ sd v out gnd fb +v in +v in 1.23v 1.2 to 30v r 1 .01 f 3.3 f r 2 v ref 3 8 5 1 4 7 shutdown input + spx2954 pin connections t o-263-5 package (t5) t op view 45 spx2954 t o-263-3 package (t) gnd gnd shutdown error 1) 3) 4) 5) 2) output input spx2954 t op view 123 3 2 1 v out v in t op view 2 1 3 4 8 7 6 5 spx2954 shutdown gnd input 5v, 3.3v tap error feedback sense output 8-pin surface mount (s) bottom view 13 2 output gnd input t o-92 (n) spx2954 13 2 v out gnd sot-223 package (m3) front view v in to-220-5 package (u5) front view spx2954 gnd shutdown error 1) 3) 4) 5) 2) output input 12345 front view to-220-3 package (u) spx2954 123 v in v out gnd note:: tab is internally connected to gnd on t0-263, sot-223, and to-220-3.
date: 12/9/05 spx2954, 250ma low dropout voltage regulator ?copyright 2005 sipex corporation 2 absolute maximum ratings power dissipation........................................internally limited lead temperature (soldering, 5 seconds) ................260 c storage temperature range........................-65 c to +150 c operating junction temperature range......-40 c to +125 c input supply voltage...........................................-0.3v to +30v feedback input voltage....................................-1.5v to +30v shutdown input voltage ................................ .-0.3v to +30v error comparator output.................................. .-0.3v to +30v esd rating................................................................2kv min spx2954a spx2954 parameter conditions min. typ. max min. typ. max. unit 3.3 v versions output voltage t j =25 c 3.284 3.3 3.317 3.267 3.3 3.333 v -25 c t j 85 c 3.267 3.3 3.333 3.251 3.3 3.350 full operating temp. 3.260 3.3 3.340 3.234 3.3 3.366 output voltage 100 a i l 250 ma 3.251 3.3 3.350 3.201 3.3 3.399 v t j t jmax 5 v versions output voltage t j = 25 c 4.975 5.0 5.025 4.950 5.0 5.050 v -25 c t j 85 c 4.950 5.0 5.050 4.925 5.0 5.075 full operating temp. 4.940 5.0 5.060 4.900 5.0 5.100 output voltage 100 a i l 250 ma 4.925 5.0 5.075 4.850 5.0 5.150 v t j t jmax all voltage options output voltage (n ote 1) 20 100 50 150 ppm/ c temperature coefficient line regulation (n ote 3) v o +1v v in 30v | 0.03 0.10 0.04 0.20 % (n ote 4) load regulation (n ote 3) 100 a i l 250 ma 0.04 0.20 0.10 0.30 % dropout voltage i l = 1ma 60 100 60 100 mv (n ote 5) i l = 100 ma 290 450 290 450 i l = 250 ma 310 500 310 500 ground current i l = 1ma 150 170 150 170 a i l = 100 ma 3 6 3 6 ma i l = 250 ma 10 14 10 14 ma current limit v out = 0 270 550 270 550 ma thermal regulation 0.05 0.2 0.05 0.2 %/w output noise, c l = 1 f 430 430 v rms 10hz to 100khz c l = 200 f 160 160 v rms c l = 3.3 f, bypass= 100 100 v rms 0.01 f from pin 7 to pin 1 (8 pin versions) 8-pin versions only reference voltage 1.220 1.235 1.250 1.210 1.235 1.260 v reference voltage over temp (n ote 6) 1.190 1.270 1.185 1.285 v feedback pin 40 60 40 60 na bias current vref temperature 20 50 ppm/ c coefficient feedback i bias 0.1 0.1 na/ c temperature coefficient electrical characteristics v in =v o + 1v, i l =100 a, c l =1 f ( note 2), t a = 25 c, unless otherwise specified.
3 date: 12/9/05 spx2954, 250ma low dropout voltage regulator ?copyright 2005 sipex corporation electrical characteristics (cont.) v in =v o +1v, i l =100 a, c l =1 f ( note 2), t a = 25 c, unless otherwise specified. n ote 1: output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range. n ote 2: unless otherwise specified all limits guaranteed for t j = 25 c, v in = 6v, i l = 100 a and c l = 1 f. additional conditions for the 8-pin versions are feedback tied to 5v tap and output tied to output sense (v out = 5v) and v shutdown 0.8v. n ote 3: regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. changes in output voltage due to heating effects are covered under the specification for thermal regulation. n ote 4: line regulation for the spx2954 is tested at i l = 1ma. n ote 5: dropout voltage is defined as the input to output differential at which the output voltage drops 100mv below its nominal 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 into account. n ote 6: v ref v out (v in - 1v), 2.3 v in 30v, 100 a i l 250ma, t j t jmax . n ote 7: comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the nominal reference voltage measured at 6v input. to express these thresholds in terms of output voltage change, multiply by the error amplifier gain = v out /v ref = (r 1 + r 2 )/r 2 . for example, at a programmed output voltage of 5v, the error output is guaranteed to go low when the output drops by 95 mv x 5v/1.235 = 384 mv. thresholds remain constant as a percent of v out as v out is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% guaranteed. n ote 8: v shutdown 2v, v in 30v, v out =0, feedback pin tied to 5v/3.3v tap. spx2954a spx2954 parameter conditions min. typ. max min. typ. max. unit error comparator output leakage current v oh = 30v 0.01 1 0.01 1 a output low voltage v in = v o -0.5v, i ol = 400 a 150 250 150 250 mv upper threshold voltage (n ote 7) 40 60 40 60 mv lower threshold voltage (n ote 7) 75 95 75 95 mv hysteresis (n ote 7) 15 15 mv shutdown input logic voltage low (regulator on) 1.3 0.7 1.3 0.7 v high (regulator off) 2.0 2.0 shutdown input current vs = 2.4v 30 50 30 50 a vs= 30v 400 800 400 800 regulator output current (n ote 8) 3 10 3 10 a in shutdown thermal resistance ja to-263-3 31.4 c/w soic-8 128.4 c/w to-92-3 131.9 c/w sot-223 62.3 c/w to-220-3 29.4 c/w
date: 12/9/05 spx2954, 250ma low dropout voltage regulator ?copyright 2005 sipex corporation 4 typical performance characteristics shutdown threshold voltage sh utd o w n th resh o ld v o ltag e (v) 1.8 1.6 1.0 -75 temperature (oc) 1.4 1.2 0.8 0.6 -50 -25 0 25 50 75 100 125 150 thermal response po w er o utput vo lta g e dissipatio n (w ) ch ang e (m v) 4 2 1 0 time ( s) 0 -2 0 -1 10 20 30 40 50 5 1.25w ~ ~ output noise vo lta g e no ise spectral density ( v /h z) 3.5 2.5 2.0 0.0 10 2 10 3 10 4 10 5 frequency (hz), c byp =0.1uf 3.0 1.5 1.0 0.5 c = 3.3 f l ripple rejection ripple rejection (db) 80 60 40 10 10 1 10 3 10 4 10 6 frequency (hz) i l = 50 a i l = 100ma c l = 1 f v in = 6v v out = 5v 70 50 30 20 10 2 10 5 line regulation o utput v o ltag e ch ang e (m v) 30 25 20 10 5 input voltage (v) 15 10 5 0 5 0 -5 -10 10 15 20 25 30 ~ ~ i l = 100 a i l = 1ma t j = 150 oc t j = 125 oc i l = 100 a c = 0.1 f byp c l = 220 f i l = 100ma c l = 1 f i l =50ma spx2954 block diagram, 8 lead 5v version input output unregulated dc shutdown ground error ______ sense to cm os or ttl reference error detection comparator error amplifier 1.23v from cmos or ttl + + + + + + 60 mv 3 7 8 1 2 6 5 4 60k ? 330k ? 180k ? . . 1 f _ _ feedback 5v tap 5v
5 date: 12/9/05 spx2954, 250ma low dropout voltage regulator ?copyright 2005 sipex corporation typical performance characteristics input current in pu t c u r r e n t ( a ) 75 0 010 input voltage (volts) r l = 50k ? 25 50 100 125 150 175 200 225 250 123 r l = 8 dropout characteristics o u t pu t vo ltag e (vo lt s) 0 0 input voltage (volts) 123 456 1 2 3 4 5 6 r l =50k ? r l =50k ? 456789 load current (ma) quiescent current g ro u n d pin c u r r e n t (m a ) 10 1 0.1 0.01 0.1 1 10 100 ground current g ro u n d c u r r e n t ( a ) 320 280 0 input voltage (volts) 240 80 40 0 12345678 120 160 200 i l = 1ma i l = 0 input voltage (volts) input current in pu t c u r r e n t (m a ) 160 150 140 130 70 50 0 120 110 100 90 80 60 40 30 20 10 0 12345678910 r l =50 ? v out = 5v quiescent current 190 170 150 130 -75 -50 -25 0 25 50 75 100 125 150 temperature (?) q u ie sc e n t c u r r e n t ( a ) v in =6v i l =100ua ground current 8 7 6 0 1 2345 678 input voltage g ro u n d c u r r e n t (m a ) 5 4 3 2 1 0 i l =100ma ground current 6 5 4 3 -75 -50 -25 0 25 50 75 100 125 150 temperature (?) g ro u n d c u r r e n t (m a ) v in = 6v i l = 100ma
date: 12/9/05 spx2954, 250ma low dropout voltage regulator ?copyright 2005 sipex corporation 6 typical performance characteristics (cont.) comparator sink current sin k c u r r e n t (m a ) 2.5 1.5 output low voltage (v) 2.0 1.0 0.5 0.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 t a = -55? t a = 25? t a = 125? line transient response time( s) 100 0 200 400 600 800 in p u t o u t p u t vo ltag e vo ltag e c h a n g e 4v 6v 8v -50 0 50 ~ ~ mv mv mv c l = 1 f i l = 1ma v out = 5v error comparator output c o m pa r ato r o u t p u t (v ) 8 6 0 input voltage (v) 4 2 0 -2 12 345 v out = 5v pullup resistor to separate 5v supply hysteresis output impedance 10 0.5 0.1 0.02 10 100 1k 10k 100k 1m frequency (hz) o u t pu t im peda n c e (o h m s) 5 0.2 0.05 0.01 1 2 i o = 100ma i o = 100 a i o = 1ma v out = 5v c l = 1 f ripple rejection 90 70 60 40 10 1 10 2 10 3 10 4 10 5 10 6 frequency (hz) r ip p l e r e je c t io n (db ) 80 50 20 30 i l = 100 a i l = 0 c l = 1 f v in = 6v v out = 5v ripple rejection frequency (hz) r ip p l e r e je c t io n (db ) 10 6 10 3 10 2 10 1 90 80 70 60 50 20 40 30 10 4 10 5 i l = 10ma i l = 1ma c l = 1 f v in = 6v v out = 5v drop-out voltage 400 300 40 -75 -50 -25 0 25 50 75 100 125 150 temperature (?) d ro p -o u t vo ltag e (m v ) 500 200 0 i l = 150ma i l = 100 a ~ ~ drop-out voltage t j = 25? output current d ro p -o u t vo ltag e (m v ) 100ma 10ma 1ma 100 a 500 400 300 200 100 0 short circuit current sh o rt c ir c u it c u r r e n t (m a ) 240 220 200 180 -75 -50 -25 0 25 50 75 100 125 150 temperature (?) 230 210 190 170 20
7 date: 12/9/05 spx2954, 250ma low dropout voltage regulator ?copyright 2005 sipex corporation feedback bias current b ia s c u r r e n t (na ) -30 -75 tempeature (?) -50 0 50 75 100 150 -20 -10 0 10 20 -25 25 125 feedback pin current f e e d bac k c u r r e n t ( a ) -150 -250 -2.0 -0.5 1.0 feedback voltage (v) -200 -100 -50 0 50 -1.5 -1.0 0 0.5 t a = 25? t a = 55? t a=1 25? pin 7 driven by external source (regulator run open loop) minimum operating voltage temperature m in im u m o p e r at in g vo ltag e (v ) 2.3 2.1 1.9 1.7 -75 0 75 150 -50 -25 25 50 100 125 load transient response 250 100 -50 100 01 23 45 time (ms) l oa d o u t p u t vo ltag e c u r r e n t c h a n g e (m v ) a ~ ~ ma -100 0 50 150 200 c l = 1 f v out = 5v 100 load transient response 80 20 -40 100 04 8121620 time (ms) l oa d o u t p u t vo ltag e c u r r e n t c h a n g e (m v ) a 100 -60 -20 0 40 60 a c l = 10 f v out = 5v ~ ~ maxium rated output o u t p u t c u r r e n t (m a ) 120 80 0 010 20 30 input voltage (v) 25 15 5 t a = 85 ? t a =25 ? t j max = 125 ? 0.25" leads soldered t o-92 package to pc board 100 60 40 20 v out=5v maxium rated output current o u t pu t c u r r e n t (m a ) 120 100 60 40 0 input voltage (v) 80 20 0 510 15 20 2530 t jmax = 125?c v out = 5v t a = 25? t a = 50? t a = 85? 8-pin molded to pc board dip soldered enable transient 7 6 4 -100 0 100 200 300 400 500 600 700 time (us) sh u t d ow n o u t pu t pin o u t vo ltag e (v ) vo ltag e (v ) 3 2 1 0 2 -2 0 5 out = 5v v in = 8v i l = 10ma v divider resistance pin 2 to pin 4 r e sista n c e (k ? ) 400 200 100 0 -75 0 75 150 temperature (?) -50 -25 25 50 100 125 300 c l = 1 f c l = 10 f typical performance characteristics (cont.)
date: 12/9/05 spx2954, 250ma low dropout voltage regulator ?copyright 2005 sipex corporation 8 external capacitors the stability of the spx2954 requires a 1 f or greater capacitor between output and ground. oscillation could occur without this capacitor. most types of tantalum or aluminum electro- lytic works fine here. for operations below -25 c solid tantalum is recommended since the many aluminum types have electrolytes that freeze at about -30 c. the esr of about 5 ? or less and resonant frequency above 500khz are the most important parameters in the value of the capacitor. the capacitors value may be in- creased without limit. at lower values of output current, less output capacitance is required for stability. for the currents below 10ma the value of the capacitor can be reduced to 0.33 f and 0.1 f for 1ma. more output capacitance is needed for the 8-pin version at voltages below 5v since it runs the error amplifier at lower gain. at worst case 3.3 f or greater must be used for the condition of 150ma load at 1.23v output. the spx2954 unlike other low dropout regula- tors will remain stable and in regulation with no load in addition to the internal voltage divider. this feature is especially important in applica- tions like cmos ram keep-alive. when set- ting the output voltage of the spx2954 version with external resistors, a minimum load of 1 a is recommended if there is more than 10 inches of wire between the input and the ac filter capacitor or if a battery is used as the input then a 1 f tantalum or aluminum electrolytic capacitor should be placed from the input to the ground. instability can occur if there is stray capacitance to the spx2954 feedback terminal (pin 7). this could cause more problems when using a higher value of external resistors to set the output voltage. this problem can be fixed by adding a 100pf capacitor between output and feedback and increasing the output capacitor to at least 3.3 f. error detection comparator output the comparator produces a logic low output whenever the spx2954 output falls out of regu- lation by more than around 5%. this is around 60 mv offset divided by the 1.235 reference voltage. this trip level remains 5% below nor- mal regardless of the programmed output volt- age of the regulator. figure 1 shows the timing diagram depicting the error signal and the regulator output voltage as the spx2954 input is ramped up and down. the error signal becomes low at around 1.3v input, and goes high around 5v input (input voltage at which v out = 4.75). since the spx2954? dropout voltage is load dependent, the input voltage trip point (around 5v) will vary with the load current. the output voltage trip point (approx. 4.75v) does not vary with load. the error comparator has an open-collector out- put, which requires an external pull-up resistor. depending on the system requirements the re- sistor may be returned to 5v output or other supply voltage. in determining the value of this resistor, note that the output is rated to sink 400ma, this value adds to battery drain in a low battery condition. suggested values range from 100k to 1m ? . if the output is unused this resis- tor is not required. programming the output voltage of spx2954 the spx2954 may be pin-strapped for 5v using its internal voltage divider by tying pin 1 (out- put) to pin 2 (sense) and pin 7 (feedback) to pin 6 (5v tap). also, it may be programmed for any output voltage between its 1.235v reference and its 30v maximum rating using an external pair of resistors. refer to the below equation for the programming of the output voltage: v out = v ref x (1 + r 1 /r 2 )+ i fb r 1 the v ref is 1.235 and i fb is the feedback bias current, nominally -20na. the minimum recommended load current of 1 a forces an applications hints
9 date: 12/9/05 spx2954, 250ma low dropout voltage regulator ?copyright 2005 sipex corporation upper limit of 1.2m ? on value of r 2 . if no load is presented the i fb produces an error of typically 2% in v out which may be eliminated at room temperature by trimming r 1 . to improve the accuracy choose the value of r 2 = 100k this reduces the error by 0.17% and increases the resistor program current by 12 a. since the spx2954 typically draws 60 a at no load with pin 2 open-circuited, this is a small price to pay. reducing output noise it may be an advantage to reduce the ac noise present at the output. one way is to reduce the regulator bandwidth by increasing the size of the output capacitor. this is the only way that noise can be reduced on the 3 lead spx2954 but is relatively inefficient, as increasing the capacitor from 1 f to 220 f only decreases the noise from 430 v to 160 vrms for a 100khz band- width at 5v output. noise can be reduced four- fold by using a bypass capacitor across r 1 , since it reduces the high frequency gain from 4 to unity. pick c bypass ? (1 / 2 r 1 x 200 hz) or choose 0.01 f. when doing this, the output capacitor must be increased to 3.3 f to maintain stability. these changes reduce the output noise from 430 v to 100 v rms for a 100khz band- width at 5v output. with the bypass capacitor added, noise no longer scales with output volt- age so that improvements are more dramatic at higher output voltages. applications hints ( cont ) 470k ? error ______ sd v out gnd +v in +v in r 1 1 f r 2 3 8 5 1 4 + fb 7 v out 470k ? spx2954 reset output error error ______ sd v out gnd fb +v in +v in *v out = v in 3 8 5 1 4 7 shutdown input spx2954 *minimum input-output voltage ranges from 40mv to 400mv. depending on load current. figure 2. latch off when error flag occurs figure 3. wide imput voltage range, current limiter + + + + 4.75v output voltage error* _______ input voltage 1.3v 5.0v * see application info. figure 1. error output timing
date: 12/9/05 spx2954, 250ma low dropout voltage regulator ?copyright 2005 sipex corporation 10 applications hints 100k ? sense sd v out gnd +v in 3 8 1 1 f + 4 400 k ? 120k ? 1.5k ? 6v sealed lead- acid battery source fb for 5.5 v + 1n457 2 20k ? ni-cad backup battery memory v+ main v+ spx385 spx2954 figure 4. low battery disconnect figure 5. regulator with state of charge indicator gnd 4 3 5 8 2 1 7 6 s d tap fb +v in sens e v out e rror ______ reset 100k? 1k? 100k? 10k? 20k? 1k? 39k? 39k? c3 c1 c2 c4 1% 1% 1% 1% 6v le ad- acid battery r 3 <6.2v** < 5.8v** < 6.0v** - + + + + - - - + v o ut = 5v 1uf + * optional latch off when dro pout oc cu r s. adj ust r3 for c2 switc hing when v in is 6.0v * outputs go low when v in dr o ps below desgnated threshholds spx2 954 100k ? 100k?
11 date: 12/9/05 spx2954, 250ma low dropout voltage regulator ?copyright 2005 sipex corporation applications hints figure 7. open circuit detector for 4ma to 20ma current loop external circuit protected from o ver temperature (v+ goes off when temp > 125) or relay 8.2k temp sensor gnd v out fb sd +v in +v in 10k 5 degree shutdown flag error _______ 3 5 8 4 7 1 a ux shutdow input off on ? as35 + - spx2954 ? . . 330k ? in v out fb 6 8 1 4.7 f + 7 27k ? spx2954 v ta p gnd sense 4 2 unregulated input 2n5432 5v output load 50ma to 300 ma (2) 360k 0.1 f v out min voltage = 4v +v in 8 1 fb 7 1n4001 20ma 1n457 4.7ma +5v output 2 gnd 4 4 spx2954 ? figure 6. system over temperature protection figure 8. 300ma regulator with 0.75v
date: 12/9/05 spx2954, 250ma low dropout voltage regulator ?copyright 2005 sipex corporation 12 package: 3 pin to-263 min nom max min nom max a0. 160 - 0.190 4.06 - 4.83 a1 0.000 - 0.010 0.00 - 0.25 b0. 020 - 0.039 0.51 - 0.99 b2 0.045 - 0.070 1.14 - 1.78 c0. 015 - 0.029 0.38 - 0.74 c2 0.045 - 0.065 1.14 - 1.65 d0. 330 - 0.380 8.38 - 9.65 d1 0.270 - - 6.86 - - e0. 380 - 0.420 9.65 - 10.67 e1 0.245 - - 6.22 - - e h0. 575 - 0.625 14.61 - 15.88 l0. 070 - 0.110 1.78 - 2.79 l1 - - 0.066 - - 1.68 l3 o 0? - 8? 0? - 8? inches controlling dimension millimeters conversion factor: 1 inch = 25.40 mm sipex pkg signoff date/rev: jl aug5-05 / rev a 0.25 bsc .010 bsc symbol 3 pin to-263 jedec to-263 variation aa 2.54 bsc .100 bsc detail c l gauge plane a1 seating plane l3 c c2 a h seating plane chamfer optional side view see detail c e1 d1 (l1) thermal pad back v iew l1 front view e d b2 e b e/2 1 2 3
13 date: 12/9/05 spx2954, 250ma low dropout voltage regulator ?copyright 2005 sipex corporation package: 3 pin to-92 d w l e1 e a (2x) e r b a s1 symbol min nom max min nom max a 0.170 - 0.195 4.32 - 4.95 b 0.014 - 0.020 0.36 - 0.51 e 0.130 - 0.155 3.30 - 3.94 e 0.095 - 0.105 2.41 - 2.67 e1 0.045 - 0.055 1.14 - 1.40 l 0.500 - 0.610 12.70 - 15.49 r 0.085 - 0.095 2.16 - 2.41 s1 0.045 - 0.060 1.14 - 1.52 w 0.016 - 0.022 0.41 - 0.56 d 0.175 - 0.195 4.45 - 4.95 4 -6 4 -6 sipex pkg signoff date/rev: jl sept23-05 / reva 3 pin to-92 dimensions in inches: controlling dimension dimensions in millimeters conversion factor: 1 inch = 25.40 mm
date: 12/9/05 spx2954, 250ma low dropout voltage regulator ?copyright 2005 sipex corporation 14 package: 3 pin to-220 min nom max min nom max a 0.140 - 0.190 3.56 - 4.83 a1 0.020 - 0.055 0.51 - 1.27 a2 0.080 - 0.115 2.03 - 2.79 b 0.015 0.027 0.040 0.25 0.51 1.02 b2 0.045 0.057 0.070 1.14 1.45 1.78 c 0.014 - 0.024 0.25 - 0.51 d 0.560 - 0.650 14.22 - 16.51 d1 0.330 - 0.355 8.38 - 8.89 d2 0.480 - 0.507 12.19 - 12.70 e 0.380 - 0.420 9.65 - 10.67 e1 0.270 - 0.350 6.86 - 8.89 e2 - - 0.030 - - 0.76 e e1 h1 0.230 - 0.270 5.84 - 6.86 l 0.500 - 0.580 12.70 - 14.73 l1 - - 0.250 - - 6.35 p 0.139 - 0.161 3.30 - 4.06 q 0.100 - 0.135 2.54 - 3.30 sipex pkg signoff date/rev: jl aug4-05 / rev a 3 pin to-220 jedec to-220 variation ab symbol 2.54 bsc 5.08 bsc dimensions in inches: controlling dimension dimensions in millimeters: conversion factor: 1 inch = 25.40 mm .100 bsc .200 bsc d2 (h1) e1 thermal pad back v iew e1 b2 e ? q d d1 e2 l l1 b 1 e front v iew h1 seating plane a1 a chamfer optional c a2 side v iew
15 date: 12/9/05 spx2954, 250ma low dropout voltage regulator ?copyright 2005 sipex corporation package: 8 pin nsoic front view l ? gauge plane l2 c r r1 ? seating plane h h ? d e e/2 3 2 1 b e e1 e1/2 6 8 pin1 designator to be within this index area (d/2 x e1/2) to p view (l1) 5 4 7 d/2 a a2 a1 side view seating plane min nom max min nom max a 1.35 - 1.75 0.053 - 0.069 a1 0.10 - 0.25 0.004 - 0.010 a2 1.25 - 1.65 0.049 - 0.065 b 0.31 - 0.51 0.012 - 0.020 c 0.17 - 0.25 0.007 - 0.010 e e1 e h 0.25 0.50 0.010 - 0.020 l 0.40 - 1.27 0.016 - 0.050 l1 l2 r 0.07 - - 0.003 - - r1 0.07 - - 0.003 - - ?-8 0 - 8 ? 5 - 15 5 - 15 ? 0 - - 0 - - d 0.041 ref sipex pkg signoff date/rev: jl aug16-05 / rev a 4.90 bsc 6.00 bsc 3.90 bsc 1.27 bsc 1.04 ref 0.193 bsc 0.25 bsc 0.010 bsc 0.236 bsc 0.050 bsc 0.154 bsc 8 pin nsoic jedec ms-012 variation aa symbol dimensions in millimeters: controlling dimension dimensions in inches conversion factor: 1 inch = 25.40 mm
date: 12/9/05 spx2954, 250ma low dropout voltage regulator ?copyright 2005 sipex corporation 16 package: 3 pin sot-223 e d 1 e e1 b2 b top view 2 2 3 e1 front view l gauge plane seating plane l2 c a1 a2 a symbol min nom max min nom max a --1. 80 - - 0.071 a1 0.02 - 0.10 0.001 - 0.004 a2 1.50 1.60 1.70 0.060 0.063 0.067 b 0.66 0.76 0.84 0.026 0.030 0.033 b2 2.90 3.00 3.10 0.114 0.118 0.122 c 0.23 0.30 0.35 0.010 0.012 0.014 d 6.30 6.50 6.70 0.248 0.256 0.264 e 6.70 7.00 7.30 0.264 0.276 0.287 e1 3.30 3.50 3.70 0.130 0.138 0.146 e e1 l 0.75 - - 0.030 - - l2 0 - 10 0 - 10 0.091 basic 0.182 basic 0.010 basic 3 pin sot-223 jedec to-261 variation aa sipex pkg signoff date/rev: jl aug8-05/rev a millimeters controlling dimension inches conversion factor: 1 inch = 25.40 mm 0.25 basic 2.30 basic 4.60 basic
17 date: 12/9/05 spx2954, 250ma low dropout voltage regulator ?copyright 2005 sipex corporation 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 please consult the factory for pricing and availability on a tape-on-reel option. ordering information part number accuracy output voltage package spx2954at-3-3 ............................................ 0.5% ................................... 3.3v ........................................................ 3 lead to-263 spx2954at-5-0 ............................................ 0.5% ................................... 5.0v ........................................................ 3 lead to-263 spx2954t-3-3 ................................................. 1% ..................................... 3.3v ........................................................ 3 lead to-263 spx2954t-5-0 ................................................. 1% ..................................... 5.0v ........................................................ 3 lead to-263 spx2954an-3-3 ............................................ 0.5% ................................... 3.3v ........................................................ 3 lead to-92 spx2954an-5-0 ............................................ 0.5% ................................... 5.0v ........................................................ 3 lead to-92 spx2954n-3-3 ................................................ 1% ..................................... 3.3v ........................................................ 3 lead to-92 spx2954n-5-0 ................................................ 1% ..................................... 5.0v ........................................................ 3 lead to-92 SPX2954AU-3-3 ............................................ 0.5% ................................... 3.3v ........................................................ 3 lead to-220 spx2954au-5-0 ............................................ 0.5% ................................... 5.0v ........................................................ 3 lead to-220 spx2954u-3-3 ................................................ 1% ..................................... 3.3v ........................................................ 3 lead to-220 spx2954u-5-0 ................................................ 1% ..................................... 5.0v ........................................................ 3 lead to-220 spx2954as-3-3 ............................................ 0.5% ................................... 3.3v ........................................................ 8 lead soic spx2954as-5-0 ............................................ 0.5% ................................... 5.0v ........................................................ 8 lead soic spx2954s-3-3 ................................................. 1% ..................................... 3.3v ........................................................ 8 lead soic spx2954s-5-0 ................................................. 1% ..................................... 5.0v ........................................................ 8 lead soic spx2954am3-3-3 .......................................... 0.5% ................................... 3.3v ........................................................ 3 lead sot-223 spx2954am3-5-0 .......................................... 0.5% ................................... 5.0v ........................................................ 3 lead sot-223 spx2954m3-3-3 .............................................. 1% ..................................... 3.3v ........................................................ 3 lead sot-223 spx2954m3-5-0 .............................................. 1% ..................................... 5.0v ........................................................ 3 lead sot-223

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