?006 fairchild semiconductor corporation 1 www.fairchildsemi.com f ebruary 2006 ka78RM33 rev. 1.0.4 ka78RM33 low dropout voltage regulator pa ckage dimensions ka78RM33 low dropout voltage regulator features 0.5a/3.3v output low dropout voltage regulator low dropout voltage (max. 0.6v) over current protection, thermal shutdown soa protection, short circuit protection description the ka78RM33 is a low-dropout voltage regulator suit- able for various electronic equipments. it provides con- stant voltage power source with surface mount type package (d-pak). the dropout voltage of ka78RM33 is below 0.6v in full rated current(0.5a). this regulator has va r ious functions such as an over current protection, a thermal shut down and the soa (safe operating area) protection. internal block diagram packages 1 v in 3 v out gnd q1 r2 current generator thermal shutdown protection short circuit protection soa protection bandgap reference error amp. output drive r1 2 d-pak to-220 1 123 2 3 1. v in 2. gnd 3. v out
2 www.fairchildsemi.com ka78RM33 rev. 1.0.4 ka78RM33 low dropout voltage regulator absolute maximum ratings electrical characteristics (v in = 5v, i o = 0.25a, t a = 25?, unless otherwise speci?d) p arameter symbol value unit remark input voltage v in 20 v output current i o 0.5 a thermal resistance junction-air r ja 110 ?/w no heatsink power dissipation pd interally limited junction temperature tj 150 ? operating temperature t opr -25 to +125 ? p arameter symbol conditions min. typ. max. unit output voltage v out i o = 10ma 3.22 3.3 3.38 v load regulation r load 5ma < i o < 0.5a 2 20 mv line regulation r line 4.3v 3 www.fairchildsemi.com ka78RM33 rev. 1.0.4 ka78RM33 low dropout voltage regulator mechanical dimensions t o-220 package 4.50 0.20 9.90 0.20 1.52 0.10 0.80 0.10 2.40 0.20 10.00 0.20 1.27 0.10 ?.60 0.10 (8.70) 2.80 0.10 15.90 0.20 10.08 0.30 18.95max. (1.70) (3.70) (3.00) (1.46) (1.00) (45 ) 9.20 0.20 13.08 0.20 1.30 0.10 1.30 +0.10 ?.05 0.50 +0.10 ?.05 2.54typ [2.54 0.20 ] 2.54typ [2.54 0.20 ] dimensions in millimeters
4 www.fairchildsemi.com ka78RM33 rev. 1.0.4 ka78RM33 low dropout voltage regulator mechanical dimensions (continued) d-pak package dimensions in millimeters 6.60 0.20 2.30 0.10 0.50 0.10 5.34 0.30 0.70 0.20 0.60 0.20 0.80 0.20 9.50 0.30 6.10 0.20 2.70 0.20 9.50 0.30 6.10 0.20 2.70 0.20 min0.55 0.76 0.10 0.50 0.10 1.02 0.20 2.30 0.20 6.60 0.20 0.76 0.10 (5.34) (1.50) (2xr0.25) (5.04) 0.89 0.10 (0.10) (3.05) (1.00) (0.90) (0.70) 0.91 0.10 2.30typ [2.30 0.20] 2.30typ [2.30 0.20] max0.96 (4.34) (0.50) (0.50)
5 www.fairchildsemi.com ka78RM33 rev. 1.0.4 ka78RM33 low dropout voltage regulator ordering information product number package packing operating t emperature ka78RM33 to-220 bulk -25? to +125? ka78RM33tu rail ka78RM33tstu rail (short leads) ka78RM33rtf d-pak tape & reel (2k/reel) ka78RM33rtm tape & reel (2.5k/reel)
6 www.fairchildsemi.com ka78RM33 rev. 1.0.4 ka78RM33 low dropout voltage regulator disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. trademarks the following are registered and unregistered trademarks fairchild semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. life support policy fa irchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. product status definitions definition of terms datasheet identification product status definition advance information preliminary no identification needed obsolete this datasheet contains the design specifications for product development. specifications may change in any manner without notice. this datasheet contains preliminary data, and supplementary data will be published at a later date. fairchild semiconductor reserves the right to make changes at any time without notice in order to improve design. this datasheet contains final specifications. fairchild semiconductor reserves the right to make changes at any time without notice in order to improve design. this datasheet contains specifications on a product that has been discontinued by fairchild semiconductor. the datasheet is printed for reference information only. formative or in design first production full production not in production isoplanar littlefet microcoupler microfet micropak microwire msx msxpro ocx ocxpro optologic optoplanar p acman pop power247 poweredge f ast f astr fps frfet globaloptoisolator gto hisec i 2 c i-lo implieddisconnect intellimax rev. i18 acex activearray bottomless build it now coolfet crossvolt dome ecospark e 2 cmos ensigna f act f act quiet series powersaver powertrench qfet qs qt optoelectronics quiet series rapidconfigure rapidconnect serdes scalarpump silent switcher smart start spm ste alth superfet supersot -3 supersot -6 supersot -8 syncfet tcm tinylogic tinyopto trutranslation uhc ultrafet unifet vcx wire across the board. around the world. the power franchise programmable active droop
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