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250ma cmos low dropout voltage low consumption regulato r lr8503 outline o lr8503 series is a group of positive voltage output, low power consumption, low dropout voltage, three terminal regulator. it can provide 250ma output current when input / output voltage differential drops to 400mv?vin =4.0v ?vout=3.0v ??the very low power consumption of lr8503 ?iq=3.0ua ?can greatly improve natural life of batteries. lr8503 can provide output value in the range of 1.2v~6.0v in 0.1v steps. it also can customized on command. lr8503 includes high accuracy voltage reference, error amplifier, current limit circuit and output driver module. lr8503 has well load transient response and good temperature characteristic, which can assure the stability of chip and power system. and it uses trimming technique to guarantee output voltage accuracy within ? 2%. lr8503 is available in sot-89-3 ?sot- 23-3 packages which is lead free ?it also can available in these packages with lead. features o ? low power consumption o3.0ua ?typ.? ? maximum output current o 250ma ? small dropout voltage o 170mv@100ma (vout=3.0v) 400mv@250ma (vout=3.0v) ? input voltage range o1.5v ??10v ? output voltage range o1.2v~6.0v ?customized on command in 0.1v steps ? ? highly accurate o?2%( ?1% customized ? ? output current limit applications o ? battery powered equipment ? power management of mp3 ?pda?dsc? mouse ?ps2 games ? reference voltage source ? regulation after switching power lr8503 typical application circuit lr8503 ty pical performance characteristic o ou t put voltage vs. output current(vout=1.5v) 1 1.1 1.2 1.3 1.4 1.5 1.6 0 100 200 300 output current ? ma ? output volt age ? v ? application hints o note1 o in p ut capacitor (cin=1uf) is recommended in all application circuit. tantalum capacitor is recommended. note2 o output capacitor (cout=1uf) is recommended in all application to assure the stability o f circuit. tantalum capacitor is recommended. lr8503 leshan radio company ltd. 1/12
selection guide o lr8503 - xx x x x pin description o pin number sot-23-3 sot-89-3 ? sm ? sot-89-3 (sa) sot-89-3 (sb) pin name function 1 1 1 2 vss ground 3 2 3 3 vin supply voltage input 2 3 2 1 vout output voltage - - - - nc no connect - - - - nc no connect pin assignment o product classification pin configuration lr8503- ??????prm lr8503- ??????psm lr8503- ??????psa lr8503- ??????psb lr8503- ??????pt packages o rm osot-23-3 sm osot-89-3 (default) saosot-89-3 sbosot-89-3 toto-92 temperature range o p ostandard ?default ?lead free? c ostandard ?cust omized ? output voltage o 12?-?-1.2v 21?-?-2.1v 25?-?-2.5v 30?-?-3.0v 35?-?-3.5v ?-?- 50?-?-5.0v out put accucy o default ?2 ? 1 o 1 ? ? cust o miz ed ? lr8503 lr8503 lr8503 8503 leshan radio company ltd. 2/12
product classification o product name output voltage package type package marking lr8503-12prm 1.2v sot-23-3 LR8503-15prm 1.5v sot-23-3 lr8503-21prm 2.1v sot-23-3 lr8503-25prm 2.5v sot-23-3 lr8503-30prm 3.0v sot-23-3 ---------- ---------- sot-23-3 lr8503-50prm 5.0v sot-23-3 lr8503-12psm 1.2v sot-89-3 LR8503-15psm 1.5v sot-89-3 lr8503-21psm 2.1v sot-89-3 lr8503-25psm 2.5v sot-89-3 lr8503-30psm 3.0v sot-89-3 ---------- ---------- sot-89-3 lr8503-50psm 5.0v sot-89-3 lr8503-12psa 1.2v sot-89-3 LR8503-15psa 1.5v sot-89-3 lr8503-21psa 2.1v sot-89-3 lr8503-25psa 2.5v sot-89-3 lr8503-30psa 3.0v sot-89-3 ---------- ---------- sot-89-3 lr8503-50psa 5.0v sot-89-3 lr8503-12psb 1.2v sot-89-3 LR8503-15psb 1.5v sot-89-3 lr8503-21psb 2.1v sot-89-3 lr8503-25psb 2.5v sot-89-3 lr8503-30psb 3.0v sot-89-3 ---------- ---------- sot-89-3 lr8503-50psb 5.0v sot-89-3 lr8503-12pt 1.2v to-92 LR8503-15pt 1.5v to-92 lr8503-21pt 2.1v to-92 lr8503-25pt 2.5v to-92 lr8503-30pt 3.0v to-92 ---------- ---------- to-92 lr8503-50pt 5.0v to-92 lr8503 lr8503 lr8503 lr8503 leshan radio company ltd. 3/12
block diagram o absolute maximum ratings o max input voltage------------------------------------------------------------------------------------ 10v junction temperature (t j ) ------------------------------------------------------------------------125 c ambient temperature(t a ) ------------------------------------------------------------------------- -40 c ??85c power dissipation sot-23-3 -------------------------------------------------------------------------------------------0.15w sot-23-5 -------------------------------------------------------------------------------------------0.25w sot-89-3 -------------------------------------------------------------------------------------------0.5w storage temperature(ts) --------------------------------------------------------------------------45 c ??150c lead temperature and time ---------------------------------------------------------------------260 c,10s recommended work conditions o item min recommended max unit input voltage range 8 v ambient temperature -40 +125 c electrical characteristicso ?test conditions ocin=1uf,cout=1uf,t a =25c, unless otherwise specified. ? lr8503-1.5v symbol parameter conditions min typ max units vin input voltage 8 v vout output voltage 1.47 1.5 1.53 v iout(max.) maximum output current vin=2.5v,vout>1.47 250 ma dropout voltage input-output voltage differential iout=100ma 270 400 mv voutvin vout ?? ? line regulation iout=40ma 1.6v vin 8v 0.2 0.3 %/v vout ? load regulation vin=2.5v 1ma iout 100ma 20 40 mv iq quiescent current vin=2.5v 3.0 5.0 ua leshan radio company ltd. 4/12
voutt vout ?? ? output voltage temperature coefficient iout=10ma 50 ppm/ c lr8503-3.0v symbol parameter conditions min typ max units vin input voltage 8 v vout output voltage 2.94 3.0 3.06 v iout(max.) maximum output current vin=4v,vout>2.94v 250 ma iout=100ma 170 300 dropout voltage input-output voltage differential iout=200ma 320 500 mv voutvin vout ?? ? line regulation iout=40ma 3.2v vin 8v 0.2 0.3 %/v vout ? load regulation vin=4.0v 1ma iout 100ma 20 40 mv iq quiescent current vin=4v 3.0 5.0 ua voutt vout ?? ? output voltage temperature coefficient iout=10ma 50 ppm/ c typical application circuit o explanation o lr8503 is a series of low dropout voltage and low power consumption three pins regulator. its application circuit is very simple, which only needs two outside capacitors. it is composed of these modules: high accuracy voltage reference, current limit circuit, error amplifier, output driver and power transistor. current limit module can keep chip and power sy stem away from danger when load current is more than 250ma. lr8503 uses trimming technique to assure the accuracy of output value within2%, at the same time, temperature compensated is elaborately considered in this chip, which makes lr8503?s temperature coefficient within 50ppm/ ??? application hints o note1 o input capacitor (cin=1uf) is recommend ed in all application circuit. tantalum capacitor is recommended. note2 o output capacitor (cout=1uf) is recommended in all application to assure the stability of circuit. tantalum capacitor is recommended. leshan radio company ltd. 5/12
ty pical performance characteristics o o u tput voltage vs output current(vout=1.5v) 1 1.1 1.2 1.3 1.4 1.5 1.6 0 50 100 150 200 250 300 o u tput current ? ma ? o ut put voltage ? v ? out p ut voltage vs output current(vout=3.0v) 2.8 2.85 2.9 2.95 3 3.05 0 50 100 150 200 250 300 ou tput current ? ma ? o u tput voltage ? v ? 1 . load regulation 2 . line regulation li ne regulation ? vout=1.5v) 1. 48 1.4 85 1.49 1.495 1.5 1.505 1.51 12345678 i npu t voltage ? v ? o ut put voltage ? v ? iout=40ma iout=6ma l i ne regulation (vout=3.0v) 2.93 2.95 2.97 2.99 3.01 3.03 3.05 3.07 34 5678 910 i np ut voltage ? v ? o u tput voltage ? v ? iout=40ma iout=3ma d r opout voltage (vout=3.0v) 2.96 2.97 2.98 2.99 3 3.01 3.02 3.03 3.04 3.05 3 3.2 3.4 3.6 3.8 4 inpu t voltage ? v ? o ut put voltage ? v ? iout=100ma iout=200ma 3 . dropout voltage d r opout voltage (vout=1.5v) 1 1. 1 1. 2 1.3 1.4 1.5 1.6 1.5 1.8 2.1 2.4 2.7 3 in put voltage ? v ? outp ut v oltage ? v ? iout=100ma iout=200ma leshan radio company ltd. 6/12
4 ? input voltage transient response ? vout=1.5v,iout=10ma ? input voltage transient response ? vout=1.5v,iout=1ma ? ci n=cout=1uf v i n=3.5v vi n=2.5v c i n=cout=1uf v i n=3.5v v i n=2.5v input voltage transient response ? vout=3.0v,iout=10ma ? input voltage transient response ? vout=3.0v,iout=1ma ? c i n=cout=1uf v i n=5v v i n=4v c i n=cout=1uf vi n=5v v i n=4v 5 ? load transient response ? vout=1.5v ? load transient response ? vout=3.0v ? i out= 40ma i out =1ma i out =40ma i out= 1ma leshan radio company ltd. 7/12
package outlineo package sot-89-3 devices per reel 1000 unit mm package dimension: taping specification: ?m1 ostandard type ?m2 ocustomized ? leshan radio company ltd. 8/12
taping reel dimension o sot-23-3: package sot-23-3 devices per reel 3000 unit mm package dimension o leshan radio company ltd. 9/12
taping specification o taping reel dimension o leshan radio company ltd. 10/12
sot-23-5: package sot-23-5 devices per reel 3000 unit mm package specification o taping dimension o?m1 ostandard type ?m2 ocustomized ? leshan radio company ltd. 11/12
taping reel dimension o leshan radio company ltd. 12/12

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