revision 12/4/2008 preliminary and all contents are subject to change without prior notice ? seaward electronics inc., 2004. ? www.seawardinc.com.cn ? page 1 1.5a cmos ultra ldo voltage regulator with en SE5220 description the SE5220 series of fixed output ultra low dropout linear regulators are designed for portable battery powered applications, which require low power consumption and low dropout voltage. each device contains a bandgap voltage reference, an error amplifier, a pmos power transistor, and resistors for setting output voltage, and current limit and temperature limit protection circuits. the SE5220 has been designed to be used with low cost capacitors and requires a minimum output capacitor of 1.0 f. standard voltage versions are 3.3v, 3.0v, and adjustable output from 1.25v to 4.5v. features ? typical 100mv dropout voltage at 500ma. ? fast enable turn-on time of 20 s (typ.) ? excellent line and load regulation. ? high accuracy output voltage of 2%. ? ultra-low ground current at 50 a (typ.) ? disable current less than 0.2 a (typ.) ? thermal and over-current protection. ? standard sop-8 package. pin configuration application ? usb removable devices ? mpeg4 devices ? wireless lan?s ? hand-held instrumentation. ? portable dvd players ? digital camera block diagram (fixed v out version)
revision 12/4/2008 preliminary and all contents are subject to change without prior notice ? seaward electronics inc., 2004. ? www.seawardinc.com.cn ? page 2 1.5a cmos ultra ldo voltage regulator with en SE5220 outline drawing sop-8 customer support seaward electronics incorporated ? china section b, 2nd floor, shangdi scientific office complex, #22 xinxi road haidian district, beijing 100085, china tel: 86-10-8289-5700/01/05 fax: 86-10-8289-5706 seaward electronics corporation ? taiwan 2f, #181, sec. 3, minquan east rd, ta i p e i , ta i w a n r . o . c tel: 886-2-2712-0307 fax: 886-2-2712-0191 seaward electronics incorporated ? north america 1512 centre pointe dr. milpitas, ca95035, usa tel: 1-408-821-6600 last updated - 12/4/2008 1 2 3 4 5 6 7 8 h e d a1 a b b1 c mi n max mi n max a 0.0532 0.0688 1.35 1.75 a1 0.0040 0.0098 0.10 0.25 b 0.0130 0.0200 0.33 0.51 b1 c 0.0075 0.0098 0.19 0.25 d 0.1890 0.1968 4.80 5.00 h 0.2284 0.2440 5.80 6.20 e 0.1497 0.1574 3.80 4.00 dimensions 0.050 bsc 1.27 bsc dim n inches mm
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