WL2803G ultra low dropout, 1.0a, cmos ldo descriptions the WL2803G series are ultra low dropout, low quiescent current, high psrr cmos ldo. the dropout voltage is 0.26v (typ.) at 0.8a load current. using cmos construction, the quiescent current consumed by the WL2803G is typically 150ua over the entire input voltage range, making it attractive for consumer, networking applications that demand high output current. the WL2803G series are available in wide output voltage range version from 1.2v to 3.3v with 0.1v step. standard output voltages are 1.8v, 3.3v. other output voltage options are available upon request. the WL2803G series offer thermal shutdown (otp) and current limit functions, to assure the stability of chip and power system at wrong condition, and it uses trimming technique to guarantee output voltage accuracy within 2%. the WL2803G regulators are available in sot-223-3l packages. standard products are pb-free and halogen-free. features input voltage : 2.5v~5.5v output voltage : 1.8v, 3.3v (or upon request) output current : 1.0a psrr : 65db @ 1khz dropout voltage : 260mv @ i out =0.8a output noise : 100uv quiescent current : 150a typ. applications lcd tv stb computer, graphic card network communication equipments others portable electronics devices sot-223-3l pin configuration (top view) 2803g = device code ** = voltage code (33: 3.3v) yy = year code ww = week code marking order information for detail information, please refer to page 9. 1 2 3 4 vout gnd vin gnd 1 of 9 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
typical application block diagram pin description pin symbol description 1 vout output 2 gnd ground 3 vin input 4 gnd connect to pin 2 v ref gnd vout vin current limit otp WL2803G 2 of 9 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
absolute maximum ratings note: these are stress ratings only. stresses exceeding the range specified under absolute maximum ratings may cause substantial damage to the device. functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. *1: surface mounted on fr-4 board using 1 square inch pad size, dual side, 1oz copper *2: surface mounted on fr-4 board using minimum pad size, 1oz copper * 3: power dissipation is calculate by p d = (v in -v out ) x i out recommend operating ratings parameter symbol value unit input voltage range v in -0.3 * 6.5 v output voltage range v out -0.3 * v in v power dissipation * 1 * 3 1.8 w power dissipation * 2 * 3 p d 0.8 w thermal resistance * 1 70 o c/w thermal resistance * 2 r ja 155 o c/w junction temperature t j 150 o c lead temperature(10s) t l 260 o c storage temperature tstg -55 ~ 150 o c hbm 8000 v esd ratings mm 400 v parameter symbol value unit operating supply voltage v in 2.5 * 5.5 v operating temperature range topr -40 * 85 o c WL2803G 3 of 9 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
electronics characteristics (ta=25 o c, v in =v out +1v, c in =c out =4.7uf, unless otherwise noted) parameter symbol condition min. typ. max. unit v out <1.5v, v in =2.5v, i out =1ma v out - 30mv v out v out + 30mv output voltage v out v out 1 1.5v, i out =1ma v out
0.98 v out v out
1.02 v dropout voltage v drop v out =v out
0.98, i out =1a 250 450 mv current limit i lim v in =5v 1.2 a line regulation ? v line v out =3.3v, v in =4.3~6.0v, i out =1ma 5 10 mv load regulation ? v load v out =3.3v , i out =1~800ma 10 30 mv quiescent current i q v out =3.3v, i out =0 150 200 ua v in =(v out +1v) dc +0.2v p-p f=1khz ,i out =10ma 65 power supply ripple rejection psrr v in =(v out +1v) dc +0.2v p-p f=10khz, i out =10ma 58 db output noise voltage e no 10hz to 100khz, c out =4.7 f 100 v p-p thermal shutdown threshold t sd 165 o c thermal shutdown hysteresis ? t sd 30 o c WL2803G 4 of 9 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
typical characteristics (ta=25 o c, v in =v out +1v, c in =c out =4.7uf, unless otherwise noted) quiescent current vs. supply voltage output voltage vs. supply voltage output voltage vs. output current quiescent current vs. ambient temperature output voltage vs. ambient temperature output voltage vs. output current 3.03.54.04.55.05.56.0 100 110 120 130 140 150 160 170 180 190 200 v out =3.3v i out =0ma quiescent current: i q (ua) input voltage: v in (v) -50 -25 0 25 50 75 100 125 150 0 50 100 150 200 250 300 v out =3.3v i out =0ma quiescent current: i q (ua) ambient temperature: t a ( o c) -50 -25 0 25 50 75 100 125 150 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 output voltage: v out (v) i out =1ma ambient temperature: t a ( o c) 3.84.04.24.44.64.85.05.25.4 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 i out =800ma output voltage: v out (v) input voltage: v in (v) 0.00.20.40.60.81.01.21.41.61.82.0 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 v in =3.8v v in =4.2v v in =5.5v output voltage: v out (v) output current: i out (a) t a = -40 o c 0.0 0.4 0.8 1.2 1.6 2.0 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 v in =3.8v v in =4.2v v in =5.5v output voltage: v out (v) output current: i out (a) t a = 25 o c WL2803G 5 of 9 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
output voltage vs. output current psrr startup with en dropout voltage vs. output current psrr shutdown with en 0 200 400 600 800 1000 0 50 100 150 200 250 300 v out =3.3v t a = 85 o c t a = 25 o c t a = -40 o c dropout voltage: v drop (mv) output current: i out (ma) 10 100 1000 10000 0 10 20 30 40 50 60 70 80 90 100 v in = 4.3v+0.2v p-p v out = 3.3v i out = 10ma power supply ripple rejection: psrr (db) ripple frequency (hz) 10 100 1000 10000 0 10 20 30 40 50 60 70 80 90 100 power supply ripple rejection: psrr (db) ripple frequency (hz) v in = 2.8v+0.2v p-p v out = 1.8v i o = 10ma 0.00.20.40.60.81.01.21.41.61.82.0 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 v in =3.8v v in =4.2v v in =5.5v output voltage: v out (v) output current: i out (a) t a =85 o c WL2803G 6 of 9 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
line regulation load regulation WL2803G 7 of 9 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
package outline dimensions sot-223-3l dimensions in millimeter symbol min. typ. max. a 1.520 1.650 1.800 a1 - - 0.100 a2 1.500 1.600 1.700 b 0.660 0.740 0.820 c 0.250 0.300 0.350 d 6.200 6.300 6.400 d1 2.900 3.000 3.100 e 3.300 3.500 3.700 e1 6.830 6.950 7.070 e 2.300 (bsc) e1 4.500 4.600 4.700 l 0.900 - 1.150 0 o c - 10 o c WL2803G 8 of 9 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
order information ordering no. v out (v) package operating temperature shipping WL2803G18-3/tr 1.8 sot-223-3l -40 ~ +85 c 2500/tape and reel WL2803G33-3/tr 3.3 sot-223-3l -40 ~ +85 c 2500/tape and reel WL2803G 9 of 9 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification
|
