www.leadchip.com.cn 1 your final power solution copyright@2008, leadchip semi 2a linear regulator LC1466 general description LC1466 series are a group of positive voltage output, high precise, and low power consumption voltage regulator. voltages are selectable in 100mv steps within a range of 1.2v to 3.6v. it also can be customized on command. LC1466 series have excellent load and line transient response and good temperature characteristics, which can assure the stability of chip and power system. and it uses trimming technique to guarantee output voltage accuracy within 2%. LC1466 series are available in sot-223 package, which is lead (pb)- free. features low quiescent current: 26ua at 5v high psrr: 60db range to 1khz low output noise: 44uv rms low dropout: 430mv at 1.5a load maximum output current: 2.5a highly accurate: 2% low esr ceramic capacitor compatible applications reference voltage source battery powered equipment pc peripherals wireless devices instrumentation typical application v dd v out gnd in out cout cin LC1466 note: input capacitor (cin=1uf) and output capacitor (cout=4.7uf) are recommended in all application circuit (low esr ceramic capacitor is available). block diagram 0 100 200 300 400 500 600 700 800 900 0.0 0.5 1.0 1.5 2.0 2.5 iload (a) dropout (mv) dropout voltage vs output current free datasheet http:///
www.leadchip.com.cn 2 your final power solution copyright@2008, leadchip semi LC1466 marking description xx: output voltage code, e.g. 25=2.5v, 33=3.3v; y: the year of manufacturing, 9 stands for year 2009, 0 stands for year 2010; w: the week of manufacturing. a stands for week 1, z stands for week 26, a stands for week 27, z stands for week 52. ordering information LC1466 1 2 3 4 code description 1 temperature & rohs: c: -40~85 c, pb free rohs std. 2 package type: la: sot-223, a type lb: sot-223, b type 3 packing type: tr: tape&reel (standard) 4 output voltage: e.g. 25=2.5v; 33=3.3v; pin configuration items description gnd ground v out output terminal v dd input terminal and supply pin for internal circuit. absolute maximum rating parameter value max input voltage 8v operating junction temperature (t j ) 125 c ambient temperature (t a ) -40 c~85 c package thermal resistance: sot-223: 20 c/w storage temperature (t s ) -40 c~150 c lead temperature & time 260 c, 10 sec exceed these limits to damage to the device. exposure to absolute maximum rating conditions may affect device reliability. recommended work conditions parameter value input voltage range max. 6v ambient temperature -40 c~85 c product classification LC1466clatr jb : product code xx: output voltage a: a type pin assignment ll: lot. no. b: fab code yw: date code product classification LC1466clbtr jb : product code xx: output voltage b: b type pin assignment ll: lot. no. b: fab code yw: date code free datasheet http:///
www.leadchip.com.cn 3 your final power solution copyright@2008, leadchip semi LC1466 electrical characteristics test conditions: c in =1uf,c out =4.7uf,t a =25 c, unless otherwise specified. symbol parameter conditions min typ max units v dd input voltage 6 v v out >1.5 v out x0.98 v out x1.02 v out output voltage v out <=1.5 v dd =set v out +1v 1ma i out 10ma v out -0.03 v out v out +0.03 v i out (max.) note 6 maximum output current v dd -v out =1v 2.5 a v drop dropout voltage i out =1.5a 430 mv vout vin vout d d line regulation i out =10ma 4v v dd 6v 0.05 0.2 %/v vout d load regulation v dd =set v out +1v 1ma i out 2.5a 15 mv is supply current v dd =set v out +1v v out floating 26 50 ua vout t vout d d output voltage temperature coefficient i out =10ma 100 ppm/ c psrr ripple rejection f=100hz, ripple=0.5vp- p, v dd =set v out +1v 60 db en output noise bw=10hz~100khz 44 uvrms note 6: the maximum power rating of each package is a constant, so along with the change of i load , the v dd -v out should be controlled to a certain range to ensure the normal operation. free datasheet http:///
www.leadchip.com.cn 4 your final power solution copyright@2008, leadchip semi LC1466 typical performance characteristics supply current vs. input voltage ripple rejection v s. frequency 0 5 10 15 20 25 30 35 40 3 4 5 6 7 8 vdd (v) is (ua) 0 10 20 30 40 50 60 70 100 1000 10000 frequency (hz) psrr (db) output voltage vs. input voltage dropout voltage vs . output current 3.20 3.22 3.24 3.26 3.28 3.30 3.32 3.34 3.36 3.38 3.40 3 4 5 6 7 8 vdd (v) vout (v) 0 100 200 300 400 500 600 700 800 900 0.0 0.5 1.0 1.5 2.0 2.5 iload (a) dropout (mv) output voltage vs. temperature 3.304 3.306 3.308 3.310 3.312 3.314 3.316 3.318 3.320 -50 0 50 100 150 t (oc) vout (v) free datasheet http:///
www.leadchip.com.cn 5 your final power solution copyright@2008, leadchip semi LC1466 test waveforms line transient response c in =1uf, cout=4.7uf, v in =4 ? 5v, v out =3v load transient response c in =1uf, cout=4.7uf, i out =10 ? 1a, v out =3v ch1: input voltage ch2: output voltage i out =1a i out =10ma v in =4v v in =5v ch1: output current ch2: output voltage free datasheet http:///
www.leadchip.com.cn 6 your final power solution copyright@2008, leadchip semi LC1466 package line package sot-223 devices per reel 2500pcs unit mm package dimension free datasheet http:///
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