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?2005 fairchild semiconductor corporation www.fairchildsemi.com rev. 1.0.2 features ka278rxxc-series (33/05/51/09/12) ? 2a/3.3v, 5v, 5.1v, 9v, 12v output low dropout voltage regulator ? to-220 full-mold package (4pin) ? overcurrent protection, thermal shutdown ? overvoltage protection, short circuit protection ? with output disable function ka278ra05c ? nominal 5v output without adjusting ? output adjustable between 1.25v and 32v ? 2a output low dropout voltage regulator ? to-220 full-mold package (4pin) ? overcurrent protection, thermal shutdown ? overvoltage protection, short circuit protection description the ka278rxxc is a low-dropout voltage regulator suit- able for various electronic equipments. it provides constant voltage power source with to-220-4 lead full mold package. the dropout voltage of ka278rxxc is below 0.5v in full rated current(2a). this regulator has various functions such as a peak current protection, a thermal shut down, an overvoltage protection . to-220f-4l 1.vin 2. vo 3. gnd 4. vdis - ka278rxxc(33/05/51/09/12) 1 1.vin 2. vo 3. gnd 4. vadj - ka278ra05c internal block diagram thermal shutdown bandgap reference overvoltage protection soa protection shortcircuit protection 1 4 3 2 vin vadj vo gnd q1 rin rref + - thermal shutdown bandgap reference overvoltage protection soa protection shortcircuit protection 1 4 3 2 vin vdis vo gnd high / low output on / off q1 r1 r2 - + - + 1.4v (ka278ra05c) (ka278r33/05/51/09/12c) ka278rxxc-series 2a output low dropout voltage regulators
ka278rxxc-series 2 absolute maximum ratings ka278rxxc, ka278ra05c parameter symbol value unit remark input voltage vin 35 v - disable voltage ka278rxxc vdis 35 v - output current io 2.0 a - power dissipation 1 pd1 1.5 w no heatsink power dissipation 2 pd2 15 w with heatsink junction temperature tj 150 c- operating temperature topr -20 ~ 80 c- thermal resistance, junction-to case (note2) r jc 2.9 c/w - thermal resistance, junction-to-air (note2) r ja 48.51 c/w -
ka278rxxc-series 3 electrical characteristics (vin=note3, io=1.0a, ta=25 c , unless otherwise specified) note: 1.these parameters, although guaranteed, are not 100% tested in production. 2. junction -to -case thermal resistance test environments. -. pneumatic heat sink fixture. -. clamping pressure 60psi through 12mm diameter cylinder. -. thermal grease applied between pkg and heat sink fixture. 3. ka278r33c : vin = 5v ka278r05c : vin = 7v ka278r09c : vin = 11v ka278r12c : vin = 15v 4. ka278r33c : vin =4 to 10v ka278r05c, ka278r51c : vin=6 to 12v ka278r09c : vin=10 to 25v ka278r12c : vin = 13v to 29v parameter symbol conditions min. typ. max. unit output voltage ka278r33c vo - 3.22 3.3 3.38 v ka278r05c - 4.88 5 5.12 ka278r51c - 4.98 5.1 5.22 ka278r09c - 8.78 9 9.22 ka278r12c - 11.7 12 12.3 load regulation rload 5ma < io < 2a - 0.1 2.0 % line regulation rline note4 - 0.5 2.5 % ripple rejection ratio rr note1 45 55 - db dropout voltage vdrop io = 2a - - 0.5 v disable voltage high ka278rxxc vdish output active 2.0 - - v disable voltage low ka278rxxc vdisl output disabled - - 0.8 v disable bias current high ka278rxxc idish vdis = 2.7v - - 20 a disable bias current low ka278rxxc idisl vdis = 0.4v - - -0.4 ma quiescent current iq io = 0a - - 10 ma reference voltage ka278ra05c vref - 1.24 1.27 1.30 v
ka278rxxc-series 4 typical performance characteristics ka278r33c input voltage vin (v) 4.50 3.75 3.00 2.25 1.50 0.75 5.25 0 0 2 4 6 8 10 output voltage vo(v) rl= rl=3.3 ? 8 0 5 10 15 20 0 20 40 60 80 100 rl= quiescent current iq(ma) input voltage vin(v) 0 output voltage vo(v) 3 disable voltage vdis (v) 0.5 1.5 122.5 4.50 3.75 3.00 2.25 1.50 0.75 5.25 0 3.34 3.32 3.30 3.36 -25 output voltage vo(v) temperature tj( o c) 75 125 02550 100 3.26 3.24 3.22 3.28 10 8 6 4 2 0 quiescent current iq(ma) junction temperature tj( o c) 75 125 02550 100 -25 -25 0 25 50 75 100 125 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 2.0a drop out voltage vdrop [v] junction temp tj [ ] figure 1. output voltage vs. input voltage figure 2. quiescent current vs. input voltage figure 4. output voltage vs. temperature(tj) figure 3. output voltage vs. disable voltage figure 5. quiescent current vs. temperature(tj) figure 6. dropout voltage vs.junction temperature
ka278rxxc-series 5 typical performance characteristics (continued) -25 power dissipation p d (w) temperature tj( o c) 75 125 02550 100 15 10 5 20 0 output current(a) relative output voltage(%) 3.0 5.0 01.02.0 4.0 80 60 20 100 0 40 6.0 output current(a) relative output voltage(%) 3.0 5.0 01.02.0 4.0 80 60 20 100 0 40 6.0 relative output voltage(%) 3.0 5.0 01.02.0 4.0 80 60 20 100 0 40 6.0 0123456 3.50 3.75 4.00 4.25 4.50 4.75 output peak current iop (a) input-output differential voltage vin-vo (v) figure 9. output peak currenrt vs. input-output differential voltage figure 7. power dissipation vs. temperature(tj) figure 8. overcurrent protection characteristics (typical value)
ka278rxxc-series 6 typical performance characteristics (continued) ka278r05c 51015 input voltage vin (v) 6 5 4 3 2 1 7 0 0 output voltage vo(v) rl= rl=2.5 ? 8 0 5 10 15 20 0 20 40 60 80 100 120 rl= quiescent current iq(ma) input voltage vin(v) 7 6 5 4 3 0 0 output voltage vo(v) 3 disable voltage vdis (v) 0.5 1.5 2 1 122.5 5.04 5.02 5.00 5.06 -25 output voltage vo(v) temperature tj( o c) 75 125 02550 100 4.96 4.94 4.92 4.98 8 6 4 2 0 quiescent current iq(ma) junction temperature tj( o c) 75 125 02550 100 -25 -25 0 25 50 75 100 125 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 2.0a drop out voltage vdrop [v] junction temp tj [ ] figure 1. output voltage vs. input voltage figure 2. quiescent current vs. input voltage figure 4. output voltage vs. temperature(tj) figure 3. output voltage vs. disable voltage figure 5. quiescent current vs. temperature(tj) figure 6. dropout voltage vs.junction temperature
ka278rxxc-series 7 typical performance characteristics (continued) -25 power dissipation p d (w) temperature tj( o c) 75 125 02550 100 15 10 5 20 0 output current(a) relative output voltage(%) 3.0 5.0 01.02.0 4.0 80 60 20 0 40 6.0 output current(a) relative output voltage(%) 3.0 5.0 01.02.0 4.0 80 60 20 0 40 6.0 0123456 3.50 3.75 4.00 4.25 4.50 4.75 output peak current iop (a) input-output differential voltage vin-vo (v) figure 7. power dissipation vs. temperature(tj) figure 8. overcurrent protection characteristics (typical value) figure 9. output peak currenrt vs. input-output differential voltage
ka278rxxc-series 8 typical performance characteristics (continued) ka278r51c 51015 input voltage vin (v) 6 5 4 3 2 1 7 0 0 output voltage vo(v) rl= rl=2.5 ? ? ? ? 8 0 5 10 15 20 0 20 40 60 80 100 120 rl= quiescent current iq(ma) input voltage vin(v) 7 6 5 4 3 0 0 output voltage vo(v) 3 disable voltage vdis (v) 0.5 1.5 2 1 122.5 5.14 5.12 5.10 5.16 -25 output voltage vo(v) temperature tj( o c) 75 125 02550 100 5.06 5.04 5.02 5.08 10 8 6 4 2 0 quescent current iq(ma) junction temperature tj( o c) 75 125 02550 100 -25 -25 0 25 50 75 100 125 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 2.0a drop out voltage vdrop [v] junction temp tj [ ] figure 1. output voltage vs. input voltage figure 2. quiescent current vs. input voltage figure 4. output voltage vs. temperature(tj) figure 3. output voltage vs. disable voltage figure 5. quiescent current vs. temperature(tj) figure 6. dropout voltage vs. junction temperature
ka278rxxc-series 9 typical performance characteristics (continued) -25 power dissipation p d (w) temperature tj( o c) 15 10 5 20 0 relative output voltage(%) output current(a) 3.0 5.0 01.02.0 4.0 80 60 20 100 0 40 6.0 10 ripple rejection rr (db) input ripple frequency (khz) 50 40 30 20 0 0.1 100 1 10 60 70 t j = 25 o c v in = 7v i o =1a ? v in = 0.5v rms time ( s) 20 15 10 5 7 0 input voltage (v) 515 25 30 0 -5 -10 -15 -20 -25 8 25 35 output voltage deviation (mv) 45 time ( s) 2.0 1.5 1.0 0.5 0 0 output current (a) 10 20 2.5 3.0 0.0 -0.5 -1.0 -1.5 -2.0 -2.5 2.0 30 40 output voltage deviation (v) 0123456 3.50 3.75 4.00 4.25 4.50 4.75 output peak current iop (a) input-output differential voltage vin-vo (v) figure 7. power dissipation vs. temperature(tj) figure 8. overcurrent protection characteristics figure 9. ripple rejection vs. input ripple frequency figure 10. line transient response figure 11. load transient response (typical value) figure 12. output peak currenrt vs. input-output differential voltage
ka278rxxc-series 10 typical performance characteristics (continued) ka278r09c 10 8 6 4 2 0 0 output voltage vo(v) 20 input voltage vin (v) 5 10 rl= rl=4.5 ? 15 8 0 5 10 15 20 0 20 40 60 80 100 120 rl= quiescent current iq(ma) input voltage vin(v) 0 output voltage vo(v) 3 disable voltage vdis (v) 0.5 1.5 122.5 10 8 6 4 2 0 9.08 9.04 9.00 9.12 -25 output voltage vo(v) temperature tj( o c) 75 125 02550 100 8.92 8.88 8.84 8.96 10 8 6 4 2 0 quescent current iq(ma) junction temperature tj( o c) 75 125 02550 100 -25 -25 0 25 50 75 100 125 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 2.0a drop out voltage vdrop [v] junction temp tj [ ] figure 1. output voltage vs. input voltage figure 2. quiescent current vs. input voltage figure 3. output voltage vs. disable voltage figure 4. output voltage vs. temperature(tj) figure 5. quiescent current vs. temperature(tj) figure 6. dropout voltage vs.junction temperature
ka278rxxc-series 11 typical performance characteristics (continued) -25 power dissipation p d (w) temperature tj( o c) 75 125 02550 100 15 10 5 20 0 output current(a) 6.0 relative output voltage(%) 3.0 5.0 01.02.0 4.0 80 60 20 100 0 40 output current(a) 6.0 relative output voltage(%) 3.0 5.0 01.02.0 4.0 80 60 20 100 0 40 6.0 relative output voltage(%) 3.0 5.0 01.02.0 4.0 80 60 20 100 0 40 0123456 3.50 3.75 4.00 4.25 4.50 4.75 output peak current iop (a) input-output differential voltage vin-vo (v) figure 7. power dissipation vs. temperature(tj) figure 8. overcurrent protection characteristics (typical value) figure 9. output peak currenrt vs. input-output differential voltage
ka278rxxc-series 12 typical performance characteristics (continued) ka278r12c 510 15 input voltage vin (v) 15.0 12.5 10.0 7.5 5.0 2.5 0 0 output voltage vo(v) rl= rl = 6 ? 20 25 8 0 5 10 15 20 0 20 40 60 80 100 120 rl= quiescent current iq(ma) input voltage vin(v) 0 output voltage vo(v) 3 disable voltage vdis (v) 0.5 1.5 122.5 15.0 12.5 10.0 7.5 5.0 2.5 0 12.04 12.02 12.00 -25 output voltage vo(v) temperature tj( o c) 75 125 02550 100 11.96 11.94 11.92 11.98 10 8 6 4 2 0 quiescent current iq(ma) junction temperature tj( o c) 75 125 02550 100 -25 -25 0 25 50 75 100 125 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 2.0a drop out voltage vdrop [v] junction temp tj [ ] figure 1. output voltage vs. input voltage figure 2. quiescent current vs. input voltage figure 4. output voltage vs. temperature(tj) figure 3. output voltage vs. disable voltage figure 5. quiescent current vs. temperature(tj) figure 6. dropout voltage vs.junction temperature
ka278rxxc-series 13 typical performance characteristics (continued) -25 power dissipation p d (w) temperature tj( o c) 75 125 02550 100 15 10 5 20 0 output current(a) relative output voltage(%) 3.0 5.0 01.02.0 4.0 80 60 20 100 0 40 6.0 output current(a) relative output voltage(%) 3.0 5.0 01.02.0 4.0 80 60 20 100 0 40 6.0 relative output voltage(%) 3.0 5.0 01.02.0 4.0 80 60 20 100 0 40 6.0 0123456 3.50 3.75 4.00 4.25 4.50 4.75 output peak current iop (a) input-output differential voltage vin-vo (v) figure 7. power dissipation vs. temperature(tj) figure 8. overcurrent protection characteristics (typical value) 0123456 3.50 3.75 4.00 4.25 4.50 4.75 output peak current iop (a) input-output differential voltage vin-vo (v) figure 9. output peak currenrt vs. input-output differential voltage
ka278rxxc-series 14 typical performance characteristics (continued) ka278ra05c 51015 input voltage vin (v) 6 5 4 3 2 1 7 0 0 output voltage vo(v) rl= rl=2.5 ? ? ? ? 8 0 5 10 15 20 0 20 40 60 80 100 120 rl= quiescent current iq(ma) input voltage vin(v) 5.04 5.02 5.00 5.06 -25 output voltage vo(v) temperature tj( o c) 75 125 02550 100 4.96 4.94 4.92 4.98 10 8 6 4 2 0 quiescent current iq(ma) junction temperature tj( o c ) 75 125 02550 100 -25 figure 1. output voltage vs. input voltage figure 2. quiescent current vs. input voltage figure 3. output voltage vs. temperature(tj) figure 6. power dissipation vs. temperature(tj) figure 5. dropout voltage vs.junction temperature -25 0 25 50 75 100 125 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 2.0a drop out voltage vdrop [v] junction temp tj [ ] * fixed mode (vo=5v) figure 4. quiescent current vs. temperature(tj) -25 power dissipation p d (w) temperature tj( o c) 75 125 02550 100 15 10 5 20 0
ka278rxxc-series 15 typical performance characteristics (continued) 0123456 3.50 3.75 4.00 4.25 4.50 4.75 output peak current iop (a) input-output differential voltage vin-vo (v) figure 7. overcurrent protection characteristics(typical value) figure 8. output peak currenrt vs. input-output differential voltage output current(a) relative output voltage(%) 3.0 5.0 01.02.0 4.0 80 60 20 100 0 40 6.0 output current(a) relative output voltage(%) 3.0 5.0 01.02.0 4.0 80 60 20 100 0 40 6.0
ka278rxxc-series 16 typical application ka278r33/05/51/09/12c figure 1. application circuit ? ci is required if regulator is located at an appreciable distance from power supply filter. ? co improves stability and transient response.(co > 47 f) ka278ra05 ? ci is required if regulator is located at an appreciable distance from power supply filter. ? co improves stability and transient response.(c o > 47 f) + + 12 3 4 vin vdis vo gnd disable signal ka278ra05 2 vin 1 3 r3 gnd 4 vo vadj r4 co r l ci output input vo = 1.25 ( 1 + ) r 1 = 1.8k ? , r 2 = 0.6k ? r 1 //r 3 r 2 //r 4 ka278ra05 2 vin 1 3 r3 gnd 4 vo vadj r4 co r l ci output input ka278ra05 2 vin 1 3 r3 gnd 4 vo vadj r4 co r l ci output input vo = 1.25 ( 1 + ) r 1 = 1.8k ? , r 2 = 0.6k ? r 1 //r 3 r 2 //r 4 vo = 1.25 ( 1 + ) r 1 = 1.8k ? , r 2 = 0.6k ? r 1 //r 3 r 2 //r 4 20 15 10 -50 variation(%) 50 100 125 -25 0 25 75 0 -5 -10 5 junction temperature tj( ) 25 20 15 10 -50 variation(%) 50 100 125 -25 0 25 75 50 100 125 -25 0 25 75 0 -5 -10 5 junction temperature tj( ) 25 ka278ra05 2 vin 1 3 gnd 4 vo vadj co r l ci output = 5v input ka278ra05 2 vin 1 3 gnd 4 vo vadj co r l ci output = 5v input figure 2. application circuit (adjustable mode) figure 3. internal resistor(r1,r2) variation vs. temperature(tj) figure 4. application circuit (fixed mode)
ka278rxxc-series 17 mechanical dimensions package dimensions in millimeters to-220f-4l
ka278rxxc-series 18 mechanical dimensions (continued) package dimensions in millimeters to-220f-4l (forming)
ka278rxxc-series 19 mechanical dimensions (continued) package dimensions in millimeters spec no. dwg. no. 5 : 1 scale n/a tolerance mm unit d to-220f-4l , short lead title 1. these dimensions do not include mold protrusion . 2. ( ) is reference 3. [ ] is ass'y out quality note pkg outline to-220f-4l (short lead)
ka278rxxc-series 2/18/05 0.0m 001 stock#dsxxxxxxxx ? 2005 fairchild semiconductor corporation life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president 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, and (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 a significant injury of the user. 2. a critical component in 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. www.fairchildsemi.com 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. ordering information product number package operating temperature ka278r33ctu to-220f-4l -20 c to +80 c ka278r05ctu ka278r51ctu ka278r09ctu ka278r12ctu ka278ra05ctu ka278r33cydtu to-220f-4l(forming) ka278r05cydtu ka278r09cydtu ka278r12cydtu ka278ra05cydtu ka278r33ctstu to-220f-4l (short lead) ka278r05ctstu KA278R12CTSTU

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