s s p p x x 2 2 9 9 3 3 0 0 0 0 / / 0 0 1 1 / / 0 0 2 2 3 3 a a l l o o w w d d r r o o p p o o u u t t v v o o l l t t a a g g e e r r e e g g u u l l a a t t o o r r october 2010 rev. 2.1.0 exar corporation www.exar.com 48720 kato road, fremont ca 94538, usa tel. +1 510 668-7000 ? fax. +1 510 668-7001 general description the SPX29300/01/02 are 3a, highly accurate voltage regulators with a low dropout voltage of 600mv (typical) at 3a. these regulators are spec ifically designed for low voltage applications that require a low dropout voltage and a fast transient response. they are fully fault protected against over- current, reverse battery, and positive and negative voltage transients. on-chip trimming adjusts the reference voltage to 1% initial accuracy. the SPX29300 is offered in a 3-pin to-263 package, the spx29301 is offered in a 5-pin to-263 while spx29302 is offered in a 5-pin to-263 and 5-pin to-220 packages. applications ? adjustable power supplies ? constant current regulators ? audio and video/graphic cards ? battery chargers features ? 3a guaranteed output current ? low dropout voltage of 600mv @ 3a ? adjustable output down to 1.25v ? 1% output accuracy ? tight load and line regulation ? fast transient response ? reverse battery protection ? zero current shutdown (spx29301/02) ? power good flag (spx29301) ? lead free 3-pin to-263, 5-pin to-220 and to-263 packages typical application diagram fig. 1: SPX29300 and spx29302 application diagrams
s s p p x x 2 2 9 9 3 3 0 0 0 0 / / 0 0 1 1 / / 0 0 2 2 3 3 a a l l o o w w d d r r o o p p o o u u t t v v o o l l t t a a g g e e r r e e g g u u l l a a t t o o r r ? 2010 exar corporation 2/10 rev. 2.1.0 absolute maximum ratings these are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. exposure to absolute maximum rating conditions for extended periods of time may affect reliability. input voltage v in 1 ................................................... 20v storage temperatur e .............................. - 65c to 150c lead temperature (sol dering, 5 se c) ..................... 260c esd rating (hbm - hu man body model) .......................... all pins except en ................................................. 2kv en pi n ................................................................. 1kv operating ratings input voltage range v in ........................................... 16v junction temperature range .................... -40c to 125c thermal resistance ...................................................... to-220-5 junction to ambient ....................... 29. 3c/w to-263-3 junction to ambient ....................... 31. 4c/w to-263-5 junction to ambient ....................... 31. 2c/w to-220-5, to-263-3, to-263-5 junction to case .. 3c/w note 1: maximum positive supply voltage of 20v must be of limited duration (<100ms) and duty cycle of less than 1%. the maximum continuous supply voltage is 16v. electrical specifications specifications with standard type are fo r an operating junction temperature of t j = t a = 25c only; limits applying over the full operating junction temperature range are denoted by a ?? ?. minimum and maximum limits are guaranteed through test, design, or statistical correlation. typical values represent the most likely parametric norm at t j = 25c, and are provided for reference purposes only. unless otherwise indicated, v in = v out + 1v and i out =10ma, c in = 6.8f, c out = 10f, t a = 25c. parameter min. typ. max. units conditions fixed voltage versions output voltage, 1.8v version 1.782 1.800 1.818 v i out =10ma 1.764 1.800 1.836 ? 10ma i out 3a, 2.8v v in 16v output voltage, 2.5v version 2.475 2.500 2.525 v i out =10ma 2.450 2.500 2.550 ? 10ma i out 3a, 3.5v v in 16v output voltage, 3.3v version 3.267 3.300 3.333 v i out =10ma 3.234 3.300 3.366 ? 10ma i out 3a, 4.3v v in 16v output voltage, 5.0v version 4.950 5.000 5.050 v i out =10ma 4.900 5.000 5.100 ? 10ma i out 3a, 6.0v v in 16v all voltage versions line regulation 0.06 0.5 % i out =10ma, (v out +1v) v in 16v load regulation 0.2 1 % v in =v out + 1v, 10ma i out i fl (note 2) v/ t 20 100 ppm/ ? c ? v out temp coefficient (note 6) dropout voltage except 1.8v version (note 3) 120 300 mv ? i out =100ma 380 i out =1.5a 600 800 ? i out =3a ground current (note 5) 30 60 ma ? i out =1.5a 40 i out =3a ground pin current at dropout 0.9 ma v in = 0.5v less than specified v out i out =10ma current limit 3.0 4.5 a v out =0v (note 4) output noise voltage 400 v rms 10hz-100khz, i out =100ma, c out =10f 260 10hz-100khz, i out =100ma, c out =33f reference voltage temperature coefficient 20 ppm/ ? c note 7 reference voltage and adjustable pin - spx29302 reference voltage 1.228 1.24 1.252 v 1.215 1.265 ? 1.203 1.277 v ref v out (v in -1), 2.3v v in 16v 10ma i l i fl , t j s s p p x x 2 2 9 9 3 3 0 0 0 0 / / 0 0 1 1 / / 0 0 2 2 3 3 a a l l o o w w d d r r o o p p o o u u t t v v o o l l t t a a g g e e r r e e g g u u l l a a t t o o r r ? 2010 exar corporation 3/10 rev. 2.1.0 parameter min. typ. max. units conditions power good flag output ? spx29301 output leakage current 0.01 1 a v oh =16v 2 ? output low voltage 220 300 mv device set for 5v, v in =4.5v, i ol =250a 400 ? upper threshold voltage 40 60 mv device set for 5v, note 8 25 ? lower threshold voltage 75 95 mv device set for 5v, note 8 140 ? hysteresis 15 mv device set for 5v, note 8 enable input ? spx29301/02 input logic voltage low (off) 0.8 v ? v in <10v input logic voltage high (on) 2.4 ? enable input pin 100 600 a v en =16v 750 ? 1 ? v en =0.8v 2 ? regulator output current in shutdown 10 500 a ? note 9 note 2: full load current (i fl ) is defined as 3.0a. note 3: dropout voltage is defined (v in -v out ) when the output voltage drops to 99% of its nominal value. note 4: v in =v out (nom)+1v. use pulse-testing procedures to minimize temperature rise. note 5: ground pin current is the regulator quiescent current. the total current drawn from the source is the sum of the load current to the ground current. note 6: output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range note 7: thermal regulation is defined as the change in outp ut voltage at time t after a ch ange in power dissipation is applied, excluding load/line regulation effects. specifications for a 200ma load pulse as v in =20v (a 4w pulse) for t=10ms. note 8: comparator threshold is expressed in terms of a voltage differential at the adjust terminal below the nominal reference voltage measured 6v input. to express these thresh olds in terms of output voltage change, multiply the error amplifier gain = v out /v ref = (r1 + r2)/r2. for example, at a programmable output voltage of 5v, the error output is guaranteed to go low when the output drops by 95mvx 5v/ 1.240v = 383mv. threshold remain constant as a percent of v out as v out is varied, with the dropout warning occurring at typically 5% below nominal, 7.7% guaranteed. note 9: v en 0.8v and v in 16v, v out = 0. block diagram fig. 2: SPX29300/01/02 block diagram
s s p p x x 2 2 9 9 3 3 0 0 0 0 / / 0 0 1 1 / / 0 0 2 2 3 3 a a l l o o w w d d r r o o p p o o u u t t v v o o l l t t a a g g e e r r e e g g u u l l a a t t o o r r ? 2010 exar corporation 4/10 rev. 2.1.0 pin assignment fig. 3: SPX29300/01/02 pin assignment ordering information part number junction temperature range marking package packing quantity note 1 note 2 SPX29300t-l-1-8 -40c t j +125c SPX29300t 18yywwlx 3-pin to263 bulk lead free SPX29300t-l-1-8/tr -40c t j +125c SPX29300t 18yywwlx 3-pin to263 500/tape & reel lead free SPX29300t-l-2-5 -40c t j +125c SPX29300t 25yywwlx 3-pin to263 bulk lead free SPX29300t-l-2-5/tr -40c t j +125c SPX29300t 25yywwlx 3-pin to263 500/tape & reel lead free SPX29300t-l-3-3 -40c t j +125c SPX29300t 33yywwlx 3-pin to263 bulk lead free SPX29300t-l-3-3/tr -40c t j +125c SPX29300t 33yywwlx 3-pin to263 500/tape & reel lead free SPX29300t-l-5-0 -40c t j +125c SPX29300t 50yywwlx 3-pin to263 bulk lead free SPX29300t-l-5-0/tr -40c t j +125c SPX29300t 50yywwlx 3-pin to263 500/tape & reel lead free spx29301t5-l-3-3 -40c t j +125c 293001t5 33yywwlx 5-pin to263 bulk lead free spx29301t5-l-3-3/tr -40c t j +125c 293001t5 33yywwlx 5-pin to263 500/tape & reel lead free spx29301t5-l-5-0 -40c t j +125c 293001t5 50yywwlx 5-pin to263 bulk lead free spx29301t5-l-5-0/tr -40c t j +125c 293001t5 50yywwlx 5-pin to263 500/tape & reel lead free spx29302t5-l -40c t j +125c 29302t5 yywwlx 5-pin to263 bulk lead free spx29302t5-l/tr -40c t j +125c 29302t5 yywwlx 5-pin to263 500/tape & reel lead free spx29302u5-l -40c t j +125c 29302u5 yywwlx 5-pin to220 bulk lead free ?yy? = year ? ?ww? = work week ? ?l? = lead free designator ? ?x? = lot number
s s p p x x 2 2 9 9 3 3 0 0 0 0 / / 0 0 1 1 / / 0 0 2 2 3 3 a a l l o o w w d d r r o o p p o o u u t t v v o o l l t t a a g g e e r r e e g g u u l l a a t t o o r r ? 2010 exar corporation 5/10 rev. 2.1.0 typical performance characteristics all data taken at v in = v out + 1v, t j = t a = 25c, unless otherwise specified. fig. 4: dropout voltage vs load current fig. 5: startup fig. 6: line regulation i out =10ma, v out =3.3v fig. 7: load regulation v out =3.3v
s s p p x x 2 2 9 9 3 3 0 0 0 0 / / 0 0 1 1 / / 0 0 2 2 3 3 a a l l o o w w d d r r o o p p o o u u t t v v o o l l t t a a g g e e r r e e g g u u l l a a t t o o r r ? 2010 exar corporation 6/10 rev. 2.1.0 theory of operation the SPX29300/01/02 incorporates protection against over-current faults, reversed load insertion, over temper ature operation, and positive and negative transient voltage. t hermal c onsiderations although the SPX29300/01/ 02 offers limiting circuitry for overload conditions, it is still necessary to insure that the maximum junction temperature is not exceeded in the application. heat will flow through the lowest resistance path, the junction-to-case path. in order to insure the best thermal flow of the component, proper mounting is required. to-220 d esign e xample : assume that v in = 10v, v out = 5v, i out = 1.5a, t a = 50c, ha = 1c/w, ch = 2c/w, and jc = 3c/w, where: t a = ambient temperature, ha = heatsink to ambient thermal resistance ch = case to heatsink thermal resistance jc = junction to case thermal resistance the power calculated under these conditions is: 7.5 and the junction temperature is calculated as or 507.5 123 95 reliable operation is insured.capacitor requirements c apacitor r equirements the output capacitor is needed to insure stability and minimize the output noise. the value of the capacitor varies with the load. however, a minimum value of 10 f aluminum capacitor will guarantee stability over all load conditions. a tantalum capacitor is recommended if a faster load transient response is needed. if the power source has high ac impedance, a 0.1 f ceramic capacitor between input & ground is recommended. m inimum l oad c urrent to ensure a proper behavior of the regulator under light load, a minimum load of 5ma for SPX29300/01/02 is required. a djustable r egulator d esign the SPX29300/01/02 is an adjustable regulator that can be programmed to any value between 1.25v and 16v using 2 external resistors, r1 and r2. the relationship between the resistors and the output voltage is: 1.240 1 e rror f lag the spx29301 features an error flag that indicates either an over current or under current voltage condition. the flag output goes low, sinking 10ma when either conditions occurs. e nable i nput the spx29301/02 has an en able function that switches the regulator on and off. their thresholds are ttl compatible. when the regulator is active, approximately 20a flows through the enable pin. t ypical a pplication c ircuits figure 1 represents the typical implementation for an adjustable output regulator. the values of r1 and r2 set the ou tput voltage value as follows: 1 a minimum value of 10k ohms is recommended for r2 with a range between 10k ? and 47k ? .
s s p p x x 2 2 9 9 3 3 0 0 0 0 / / 0 0 1 1 / / 0 0 2 2 3 3 a a l l o o w w d d r r o o p p o o u u t t v v o o l l t t a a g g e e r r e e g g u u l l a a t t o o r r ? 2010 exar corporation 7/10 rev. 2.1.0 package specification 3-p in to-263
s s p p x x 2 2 9 9 3 3 0 0 0 0 / / 0 0 1 1 / / 0 0 2 2 3 3 a a l l o o w w d d r r o o p p o o u u t t v v o o l l t t a a g g e e r r e e g g u u l l a a t t o o r r ? 2010 exar corporation 8/10 rev. 2.1.0 5-p in to-263
s s p p x x 2 2 9 9 3 3 0 0 0 0 / / 0 0 1 1 / / 0 0 2 2 3 3 a a l l o o w w d d r r o o p p o o u u t t v v o o l l t t a a g g e e r r e e g g u u l l a a t t o o r r ? 2010 exar corporation 9/10 rev. 2.1.0 5-p in to-220
s s p p x x 2 2 9 9 3 3 0 0 0 0 / / 0 0 1 1 / / 0 0 2 2 3 3 a a l l o o w w d d r r o o p p o o u u t t v v o o l l t t a a g g e e r r e e g g u u l l a a t t o o r r ? 2010 exar corporation 10/10 rev. 2.1.0 revision history revision date description 1.0.0 12/17/2009 initial release of datasheet 2.0.0 03/31/2010 reformat of datasheet inserted esd data modified dropout voltage and ground current values in electrical characteristics table corrected typographical error in result of calculus in note 8 removed ?gound current vs load current?, ?enable threshold vs temperature? and ?power supply rejection ratio curves? updated ?dropout voltage vs load current?, ?line regulation? and ?load regulation? curves added ?start up? curve 2.1.0 10/19/2010 corrected adjustable regulator design paragraph equation for further assistance email: customersupport@exar.com exar technical documentation: http://www.exar.com/techdoc/default.aspx? e xar c orporation h eadquarters and s ales o ffices 48720 kato road fremont, ca 94538 ? usa tel.: +1 (510) 668-7000 fax: +1 (510) 668-7030 www.exar.com notice exar corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. exar corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and make s no representation that the circuits are free of patent infringement. charts and schedules contained here in are only for illustr ation purposes and may vary depending upon a user?s specific application. while the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. exar corporation does not recommend the us e of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause fa ilure of the life support system or to significantly affect it s safety or effectiveness. products are not authorized for use in such applications unless exar corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of exar corporation is adequately protected under the circumstances. reproduction, in part or whole, without the prior written consent of exar corporation is prohibited.
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