r1112n/r1122n series low noise 150ma ldo no.ek-060-091101 cmos ldo regulator the r1112n/r1122n series are cmos-based ldo regulators featuring 150ma output. high ripple rejection and excellent load transient response of the series make the product ideally suited for use in power source for hand-held communication equipment. the polarity of the ce pin can be selected. two different pin layout as r1112n and r1122n are available. ceramic capacitors can be used. features ? supply current (i ss ) typ. 100 a (v in =set v out +1v) ? standby current (i standby ) typ. 0.1 a (same as above, in standby) ? dropout voltage (v dif ) typ. 0.19v (i out =100ma, v out =2.8v) ? ripple rejection (rr)typ. 80db (f=1khz) ? input voltage range (v in ) 2.0v to 6.0v ? output voltage range (v out )1.5v to 5.0v (internally fixed) ? output voltage accuracy 2% ? temp. coeff. of output voltage typ. 100ppm/ c ? line regulation typ. 0.05%/v ? fold-back protection circuit current limit typ. 30ma ? package sot-23-5 ? replaceable with lp2980 or lp2985. (r1112n) ? replaceable with tk111, tk112 or tk113. (r1122n) ? ceramic capacitors can be used. 2.2 f or more block diagrams r1112nxx1a r1112nxx1b r1122nxx1a r1122nxx1b ( ce pin "l" active) (ce pin "h" active) vref current limit v dd v out gnd ce vref current limit v dd v out gnd ce selection guide package quantity per reel part no. r1112n . xx . 1 . ? -tr-f sot-23-5 3,000 pcs r1122n . xx . 1 . ? -tr-f . xx . : specify the output voltage within the range 1.5v ( . 15 . ) to 5.0v ( . 50 . ) in 0.1v steps. . ? : select the polarity of the ce pin from ( . a . ) "l" active or ( . b . ) "h" active. package (top view) t ypical characteristic sot-23-5 1 3 5 4 2 r1112n r1122n 1 v dd 2 gnd 3 ce or ce 4 nc 5 v out 1 v out 2 gnd 3 v dd 4 ce or ce 5 nc r1112n301b r1122n301b dropout voltage vs. output current 150 50 0 100 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0 output current i out (ma) dropout voltage v dif (v) 85 c 25 c -40 c applications ? power source for hand-held communication equipment, cameras, and vcrs ? power source for home appliances ? power source for battery-powered equipment
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