bay linear, inc 2478 armstrong street, livermore, ca 94550 tel: (925) 989-7144, fax: (925) 940-9556 www.baylinear.com 7.5a low dropout voltage regulator b1083 adjustable advance information pin connection ordering information devices package temp. bl1084t to-220 0 c to 70 c description the bay linear b1083 is monolithic low power 7.5a adjustable and fixed npn voltage regulator that are easy to use with minimum external components. all internal circuitry is designed to operate down to 1v input to output differential and the dropout voltage is fully specified as a function of load current. dropout is guaranteed at a maximum of 1.5v at a maximum output current. current limit is trimmed, minimizing the stress on both the regulator and power source circuitry under overload conditions. it is suitable for applications requiring a well-regulated positive output voltage with low input-output differential voltage. the b1083 outstanding features include full power usage up to 7.5amp of load current internal current limiting and thermal shutdown. a 10 f output capacitor is required on these new devices; how ever, this is usually included in most regulator design. the b1083 is offered in a 3-pin to-220, to-263 packages compatible with other 3 terminal regulators. for 5a low dropout regulator refer to the bl1084 data sheet. features ? adjustable output down to 1.2v ? output current of 7.5a ? low dropout voltage 1.0v typ. ? 0.015% line regulation ? 0.01% load regulation ? current & thermal limiting ? standard 3-terminal low cost to-220 ? similar to industry standard lt1083 applications ? constant current regulators ? smps post regulator ? high efficiency linear regulator ? high efficiency linear power supplies ? battery charger ? adjustable power supplies bay linear bay linear bay linear bay linear linear excellence lin ea r ex ce ll e n ce lin ea r ex ce ll e n ce linear excellence plastic package to-220 front view v out gnd v in plastic package to-220 plastic package to-220 front view v out v out gnd v in v in
bay linear, inc 2478 armstrong street, livermore, ca 94550 tel: (925) 989-7144, fax: (925) 940-9556 www.baylinear.com b1083 absolute maximum rating parameter symbol value unit maximum input voltage v in 30 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 300 c electrical characteristics (v in = 4.75v to 5.25v; i o = 10ma to 3.0amp, unless otherwise specified) parameter symbol conditions min typ max unit 1.238 1.262 reference voltage v o i o = 10ma,t= 25 c, v in -v out =3v 10ma i out i full load 1.5v (v in -v out ) 25v (note3) 1.225 1.250 1.270 v line regulation (1) reg (line) i load = 10ma, 1.5v (v in ? v out ) 15v t= 25 c 15v (v in -v out ) 30v 0.015 0.035 0.05 0.20 0.20 0.50 load regulation (1) reg (load) (v in -v out )=3v 10ma i out i full load t= 25 c 0.1 0.2 0.30 0.40 % dropout voltage v d t= 25 c over temperature 1.3 1.5 v current limit i s (v in -v out )=5v (v in -v out )=25v 8.0 0.4 9.5 1.0 a minimum load current i min load (v in -v out )= 25v 10 10 ma temperature regulation t a t= 25 c, 30ms pulse 0.002 0.01 %/w long term stability - t= 25 c, 1000hrs 0.3 1 temperature stability t s 0.5 % adjust pin current - t= 25 c over temp. 55 120 a ripple rejection r a f=120hz, c adj =25 f, c out =25 f tantalum i out =i full load , (v in -v out )=3v (note 5) 60 75 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, sp ace equipment, submarine, or nuclear facility applications wit hout the specific written consent of bay linear president.
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