dice/dwf specification 1 lt1962 information furnished by linear technology corporation is believed to be accurate and reliable. however, no responsibility is assumed for its use. linear technology corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. pad function 1. 2. 3. 4. 5. 6. 7. 8. out adj byp gnd shdn nc nc in absolute maximum ratings in pin voltage .........................................................20v out pin voltage ......................................................20v input to output differential voltage (note 2) ...........20v adj pin voltage ...................................................... 7v byp pin voltage .....................................................0.6v shdn pin voltage ................................................. 20v output short-circuit duration ........................ inde? nite (note 1) 74mils 61mils, 5 die cross reference ltc finished part number order dice candidate part number below lt1962 lt1962 dice lt192 dwf* please refer to ltc standard product data sheet for other applicable product information. *dwf = dice in wafer form. 300ma, low noise, micropower ldo regulator , lt, ltc and ltm are registered trademarks of linear technology corporation. all other trademarks are the property of their respective owners. 8 4 3 2 1 4
dice/dwf specification 2 lt1962 linear technology corporation 1630 mccarthy blvd., milpitas, ca 95035-7417 (408) 432-1900 fax: (408) 434-0507 www.linear.com ? linear technology corporation 2006 lt 0506 ? printed in usa wafer level testing is performed per the indicated speci? cations for dice. considerable differences in performance can often b e observed for dice versus packaged units due to the in? uences of packaging and assembly on certain devices and/or parameters. please consult factory for more information on dice performance and lot quali? cations via lot sampling test procedures. dice data sheet subject to change. please consult factory for current revision in production. i.d.no. 66-13-1962 dice/dwf electrical test limits t a = 25c (note 3) parameter conditions min max units adj pin voltage (notes 4, 5) v in = 2v, i load = 1ma 1.208 1.232 v line regulation v in = 2v to 20v, i load = 1ma (note 4) 5 mv load regulation v in = 2.3v, i load = 1ma to 50ma (note 4) 5 mv dropout voltage (notes 6, 7, 12) v in = v out(nominal) i load = 10ma i load = 50ma 0.15 0.20 v v gnd pin current (notes 6, 8) v in = 2.3v i load = 0ma i load = 1ma i load = 50ma i load = 100ma 75 120 1.6 3 a a ma ma adj pin bias current (notes 4, 9) 100 na shutdown threshold v out = off to on v out = on to off 0.25 2v v shdn pin current (note 10) v shdn = 0v v shdn = 20v 0.5 5 a a quiescent current in shutdown v in = 6v, v shdn = 0v 1 a input reverse leakage current v in = C20v, v out = 0v 1 ma reverse output current (note 11) v out = 1.22v, v in < 1.22v 10 a note 1: stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. exposure to any absolute maximum rating condition for extended periods may affect device reliability and lifetime. note 2: absolute maximum input to output differential voltage cannot be achieved with all combinations of rated in pin and out pin voltages. with the in pin at 20v, the out pin may not be pulled below 0v. the total measured voltage from in to out can not exceed 20v. note 3: the lt1962 regulators are tested and speci ed under pulse load conditions such that t j t a . the lt1962 is 100% tested at t a = 25?. note 4: the lt1962 (adjustable version) is tested and speci ed for these conditions with the adj pin connected to the out pin. note 5: operating conditions are limited by maximum junction temperature. the regulated output voltage speci? cation will not apply for all possible combinations of input voltage and output current. when operating at maximum input voltage, the output current range must be limited. when operating at maximum output current, the input voltage range must be limited. note 6: to satisfy requirements for minimum input voltage, the lt1962 (adjustable version) is tested and speci? ed for these conditions with an external resistor divider (two 250k resistors) for an output voltage of 2.44v. the external resistor divider will add a 5a dc load on the output. note 7: dropout voltage is the minimum input to output voltage differential needed to maintain regulation at a speci? ed output current. in dropout, the output voltage will be equal to: v in C v dropout . note 8: gnd pin current is tested with v in = 2.3v and a current source load. this means the device is tested while operating close to its dropout region. this is the worst-case gnd pin current. the gnd pin current will decrease slightly at higher input voltages. note 9: adj pin bias current ? ows into the adj pin. note 10: shdn pin current ? ows into the shdn pin. this current is included in the speci? cation for gnd pin current. note 11: reverse output current is tested with the in pin grounded and the out pin forced to the rated output voltage. this current ? ows into the out pin and out the gnd pin. note 12: for the lt1962, dropout voltage will be limited by the minimum input voltage speci? cation under some output voltage/load conditions. see the curve of minimum input voltage in the typical performance characteristics in the lt1962 data sheet.
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