iru1015-33 1 rev. 1.2 08/01/02 www.irf.com typical application description the iru1015-33 is a low dropout three terminal fixed 3.3v output regulator with minimum of 1.5a output cur- rent capability. this product is specifically designed to provide well regulated supply for low voltage ic applica- tions requiring 3.3v output. the iru1015-33 is guaran- teed to have <1.3v dropout at full load current making it ideal to provide well regulated output with supply voltage as low as 4.6v input. 1.5a low dropout positive fixed 3.3v regulator t j (c) 3-pin plastic 3-pin plastic 2-pin plastic 2-pin plastic to-220 (t) to-263 (m) ultra thin-pak tm (p) to-252 (d-pak) 0 to 150 iru1015-33ct iru1015-33cm iru1015-33cp IRU1015-33CD figure 1 - typical application of iru1015-33. data sheet no. pd94123 features applications guaranteed < 1.3v dropout at full load current fast transient response 1% voltage reference initial accuracy output current limiting built-in thermal shutdown standard 3.3v chip set and logic applications package order information 5v 3.3v / 1.5a c1 100uf c2 100uf iru1015-33 1 2 3 v out gnd v in
iru1015-33 2 rev. 1.2 08/01/02 www.irf.com absolute maximum ratings input voltage (v in ) .................................................... 7v power dissipation ..................................................... internally limited storage temperature range ...................................... -65c to 150c operating junction temperature range ..................... 0c to 150c package information 3-pin plastic to-220 (t) 3-pin plastic to-263 (m) 2-pin plastic ultra thin-pak tm (p) 2-pin plastic to-252 (d-pak) q jt =2.7 c/w q ja =60 c/w q ja =35 c/w for 1" square pad q ja =70 c/w for 1" square pad q ja =70 c/w for 0.5" sq pad unless otherwise specified, these specifications apply over c in =1 m f, c out =10 m f, and t j =0 to 150 8 c. typical values refer to t j =25 8 c. electrical specifications note 1: low duty cycle pulse testing with kelvin con- nections is required in order to maintain accurate data. note 2: dropout voltage is defined as the minimum dif- ferential voltage between v in and v out required to main- tain regulation at v out . it is measured when the output voltage drops 1% below its nominal value. note 3: minimum load current is defined as the mini- mum current required at the output in order for the out- put voltage to maintain regulation. typically the resistor dividers are selected such that this current is automati- cally maintained. gnd v in v out 1 2 3 front view tab is v out gnd v out v in tab is v out front view 1 2 3 gnd v in front view 1 3 tab is v out gnd v in 1 3 front view tab is v out io=10ma, t j =25 8 c, v in =5v io=10ma, v in =5v io=10ma, 4.7v iru1015-33 3 rev. 1.2 08/01/02 www.irf.com application information pin descriptions pin # pin symbol pin description figure 2 - simplified block diagram of the iru1015-33. block diagram this pin must be connected to ground plane using a low inductance short connection. the output of the regulator. a minimum of 10 m f capacitor must be connected from this pin to ground to insure stability. the input pin of the regulator. typically a large storage capacitor is connected from this pin to ground to insure that the input voltage does not sag below the minimum drop out voltage during the load transient response. this pin must always be 1.3v higher than v out in order for the device to regulate properly. 1 2 3 gnd v out v in v in 3 1 gnd 2 v out thermal shutdown current limit 1.25v + + stability the iru1015-33 requires the use of an output capacitor as part of the frequency compensation in order to make the regulator stable. typical designs for microprocessor applications use standard electrolytic capacitors with a typical esr in the range of 50 to 100m v and an output capacitance of 500 to 1000 m f. fortunately as the capacitance increases, the esr decreases resulting in a fixed rc time constant. the iru1015-33 takes advantage of this phenomena in making the overall regulator loop stable. for most applications a minimum of 100 m f aluminum electrolytic capacitor such as sanyo mvgx series, panasonic fa series as well as the nichicon pl series insures both stability and good transient response. ir world headquarters: 233 kansas st., el segundo, california 90245, usa tel: (310) 252-7105 tac fax: (310) 252-7903 visit us at www.irf.com for sales contact information data and specifications subject to change without notice. 02/01
iru1015-33 4 rev. 1.2 08/01/02 www.irf.com (d) to-252 package 2-pin symbol a b c d e f g h j k l m n o p q r r1 s min 6.477 5.004 0.686 7.417 9.703 0.635 4.521 & 1.52 2.184 0.762 1.016 5.969 1.016 0 0.534 0.428 max 6.731 5.207 0.838 8.179 10.084 0.889 4.623 & 1.62 2.388 0.864 1.118 6.223 1.118 0.102 0.686 0.588 note: all measurements are in millimeters. a b c d f g h 45 8 k m q 7 8 n p r s r1 l c e j l o r0.31 typ r0.51 typ 2.286 bsc
iru1015-33 5 rev. 1.2 08/01/02 www.irf.com (m) to-263 package 3-pin symbol a b c d e g h k l m n p r s u v min 10.05 8.28 4.31 0.66 1.14 14.73 1.40 0.00 2.49 0.33 2.286 0 8 2.41 max 10.312 8.763 4.572 0.91 1.40 15.75 1.68 0.254 2.74 0.58 2.794 8 8 2.67 6.50 ref 7.75 ref 2.54 ref note: all measurements are in millimeters. a e m l n u c b k p v r s h g d c l
iru1015-33 6 rev. 1.2 08/01/02 www.irf.com (p) ultra thin-pak tm 2-pin note: all measurements are in millimeters. symbol a a1 b c d e g g1 h k l m n p r u v min 5.91 5.54 6.02 1.70 0.63 0.17 2.16 4.45 9.42 0.76 0.02 0.89 0.25 0.94 2 8 2.92 max 6.17 5.79 6.27 2.03 0.79 0.33 2.41 4.70 9.68 1.27 0.13 1.14 0.25 1.19 6 8 3.30 5.08 nom a e m l n u c b k p v h g d r l c a1 g1
iru1015-33 7 rev. 1.2 08/01/02 www.irf.com (t) to-220 package 3-pin symbol a a b b1 c1 cp d e e e1 e3 f h1 j1 l q r min 4.06 3 8 0.63 1.14 0.38 3.71d 14.22 9.78 2.29 4.83 1.14 1.14 5.94 2.29 13.716 2.62 5.588 max 4.83 7.5 8 1.02 1.52 0.56 3.96d 15.062 10.54 2.79 5.33 1.40 1.40 6.55 2.92 14.22 2.87 6.17 note: all measurements are in millimeters. e-pin cp c1 j1 f a a (5x) q e b e3 b1 e1 l h1 e d r l c c l
iru1015-33 8 rev. 1.2 08/01/02 www.irf.com pkg desig d m p t package description to-252, (d-pak) to-263 ultra thin-pak tm to-220 parts per tube 75 50 75 50 parts per reel 2500 750 2500 --- package shipment method pin count 2 3 2 3 t & r orientation fig a fig b fig c --- feed direction figure a feed direction figureb 1 1 1 1 1 1 ir world headquarters: 233 kansas st., el segundo, california 90245, usa tel: (310) 252-7105 tac fax: (310) 252-7903 visit us at www.irf.com for sales contact information data and specifications subject to change without notice. 02/01 feed direction figurec 1 1 1
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