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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- 5 % & m f d u s p o j d % f w j d f t $ p n q b o z ricoh presented with the japan management quality award for 1999 . ricoh continually strives to promote customer satisfaction, and shares the achievements of its management quality improvement program with people and society. ricoh awarded iso 14001 certification. the ricoh group was awarded iso 14001 certification, which is an international standard for environmental management systems, at both its domestic and overseas production facilities. our current aim is to obtain iso 14001 certification for all of our business offices. ricoh completed the organization of the lead-free production for all of our products. after apr. 1, 2006, we will ship out the lead free products only. thus, all products that will be shipped from now on comply with rohs directive.
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