bay linear, inc 2478 armstrong street, livermore, ca 94550 tel: (925) 989-7144, fax: (925) 940- 9556 www.baylinear.com 8.0a low dropout voltage regulator B1580 adjustable & fix output pin connection ordering information devices package temp. B1580t to-220 0 c to 70 c B1580s to-263 0 c to 70 c description the bay linear B1580 is monolithic low power 8.0a adjustable and fixed npn voltage regulator that are easy to use with minimum external components. it is suitable for applications requiring a well-regulated positive output voltage with low input-output differential voltage requirements and output voltage 1.5v, 2.5v, 3.0v, 3.3v, or 5v. the B1580 outstanding features include full power usage up to 8.0amp of load current internal current limiting and thermal shutdown. other fixed versions are also available consult with factory. the B1580 is offered in a 5-pin to-220, & to-263 packages compatible with other 5 terminal regulators. for 5a low dropout regulator refer to the b1581 data sheet. features ? adjustable output down to 1.2v ? fixed output voltages 2.5v, 3.0v 3.3v, and 5.0v ? output current of 8.0a ? low dropout voltage 700mv typ. ? current & thermal limiting ? standard 3-terminal low cost to-220, d 2 packages ? similar to industry standard ez1580/cs5208 applications ? 3.3v to 2.5v for pentium processor ? smps post regulator ? high efficiency ?green? computer systems ? high efficiency linear power supplies ? 5v to 3.xxv fro pentium processor ? battery charger bay linear bay linear bay linear bay linear linear excellence v power output 1 2 3 4 5 v control adj/gnd. sense to-263-5 package v power v power output 1 2 3 4 5 v control v control adj/gnd. sense to-263-5 package
bay linear, inc 2478 armstrong street, livermore, ca 94550 tel: (925) 989-7144, fax: (925) 940- 9556 www.baylinear.com B1580 absolute maximum rating parameter symbol value unit maximum input voltage v in 7 v power dissipation p o internally limited w thermal resistance junction to case jc 3 thermal resistance junction to ambient ja 50 c/w operating junction temperature range control section power transistor t j 0 to 125 0 to 150 storage temperature range t stg -65 to 150 lead temperature (soldering 10 sec.) t lead 260 c electrical characteristics (v in = 4.75v to 5.25v; i o = 10ma to 8.0amp, unless otherwise specified) parameter symbol conditions min typ max unit -1 1 output voltage v o v cont = v out +1.5v, v pwr =v out +0.5v v cont = v out +1.5v, v pwr =v out +0.8v i load =10ma to 8a -2 2 % 1.238 1.262 reference voltage v ref v cont =2.75v, v pwr =2v, i load =10ma v cont =2.7v, to 12v v pwr =3.3v to 5.5v, i load =10ma to 8a 1.230 1.250 1.270 v line regulation (1) reg (line) i o = 10ma, v in =5v, t= 25 c 0.04 0.2 0.08 0.40 load regulation (1) reg (load) i o = 10ma, v in =5v, t= 25 c % dropout voltage v pwr -v out v cont =v out +2.5v, i load =8a 0.55 0.70 v minimum load current i min 5 10 ma current limit i s (v in -v out )=3v 8 10 a ground pin current i q v in =5v 200 ma temperature stability t s i o = 10ma, v in =5v 0.5 % thermal regulation t= 25 c, 30ms pulse 0.003 %/w ripple rejection r a t= 25 c, v in =5v 60 80 db thermal resistance - to-220 junction to tab junction to ambient dd package junction to tab junction to ambient 3.0 60 3.0 60 3.0 60 3.0 60 c/w note: output switch tests are performed under pulsed conditions to minimize power dissipation
bay linear, inc 2478 armstrong street, livermore, ca 94550 tel: (925) 989-7144, fax: (925) 940- 9556 www.baylinear.com advance information - these data sheets contain descriptions of products that are in development. the specifications are based on the engineering ca lculations, computer simulations and/ or initial prototype evaluation. preliminary information - these data sheets contain minimum and maximum specifications that are based on the initial device characterizations. these lim its are subject to change upon the completion of the full characterization over the specified temperature and supply voltage ranges. the application circuit examples are only to explain the representative applications of the devices and are not intended to gua rantee any circuit design or permit any industrial property right to other rights to execute. bay linear takes no responsibility for any problems related to any industrial property right resulting from the use of the contents shown in the data book. typical parameters can and do vary in different applications. customer?s technical experts must validate all operating parameters including ? typical? for each customer applic ation. life support and nuclear policy bay linear products are not authorized for and should not be used within life support systems which are intended for surgical implants into the body to support or sustain life, in aircraft, space equipment, submarine, or nuclear facility applications wi thout the specific written consent of bay linear president.
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