?2001 fairchild semiconductor corporation www.fairchildsemi.com rev. 1.0.0 features ? output adjustable between 1.2v and 33v ? guaranteed 3a output current ? internal thermal over load protection ? load regulation (typ: 0.1%) ? line regulation (typ: 0.015%/v) ? internal short circuit current limit ? output transistor safe area compensation description the ka350 is an adjustable 3-terminal positive voltage regulator capable of supplying in excess of 3.0 a over an output voltage range of 1.2v to 33 v to-220 1. adj 2. output 3. input 1 internal block diagram ka350 3-terminal 3a positive adjustable voltage regulator
ka350 2 absolute maximum ratings electrical characteristics (v i -v o =5v, i o =1.5a, t j =0 c to + 125 c; p d p dmax , unless otherwise specified) note: 1. regulation is measured at constant junction temperature. changes in output voltage due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. parameter symbol value unit input output voltage differential v i - v o 35 v dc lead temperature (soldering, 10sec) t lead 300 c power dissipation p d internally limited - operating temperature range t opr 0 ~ +125 c storage temperature range t stg -65 ~ +150 c parameter symbol conditions min. typ. max. unit line regulation (note1) rline t a = +25 c, 3v v i -v o 35v - 0.015 0.03 %/v load regulation (note1) rload t a = +25 c, 3v v i -v o 35v v o 5v v o 5v -5 0.1 25 0.5 mv % adjustment pin current i adj - - 50 100 a adjustment pin current change ? i adj 3v v i -v o 35v, 10ma i o 3a, p d p max - 0.2 5.0 a thermal regulation reg t pulse = 20ms, t a =+ 25 c - 0.002 - %/w reference voltage v ref 3v v i -v o 35v, 10ma i o 3a,p d 30w 1.2 1.25 1.30 v line regulation rline 3.0v v i -v o 35v - 0.02 0.07 %/w load regulation rload 10ma i o 3.0a v o 5.0v v o 5.0v -20 0.3 70 1.5 mv % temperature stability st t t j = 0 c to + 125 c-1.0-% maximum output current i o(max) v i -v o 10v, p d p max 3.0 4.5 - a v i -v o = 30v, p d p max ,t a = +25 c 0.25 1.0 - a minimum load current i l(min) v i -v o = 35v - 3.5 10 ma rms noise, %of v out v n 10hz f 10khz, t a = +25 c - 0.003 - %/v o ripple rejection rr v o = 10v, f = 120hz, c adj = 0 c adj = 10 f66 65 80 -db db long-term stability st t j =+125 c - 0.3 1 %/ 1000hr
ka350 3 typical perfomance characteristics figure 1. load regulation figure 3. adjustment pin current figure 5. temperature stability figure 2. current limit figure 4. dropout voltage figure 6. minimum load current
ka350 4 typical perfomance characteristics (continued) figure 7. ripple rejection vs vo figure 9. ripple rejection vs frequency figure 11. line transient response figure 8. ripple rejection vs io figure 10. output impedance figure 12. load transient response
ka350 5 typical application figure 13. c i : c i is required if the regulator is located an appreciable distance from power supply filter. c o : output capacitors in the range of 1 f to 100 f of aluminum or tantalum capacitor are commonly used to provide improved output impedance and rejection of transients. in operation, the ka350 develops a nominal 1.25v reference voltage, v ref , between the output and adjustment terminal. the reference voltage is impressed across program resistor r 1 and, since the voltage is constant, a constant current i 1 then flows through the output set resistor r 2 , giving an output voltage of v o = 1.25v(1+r 2 /r 1 ) + i adj r 2 since i adj current (less than 100 f) from the adjustment terminal represents an error term, the ka350 was designed to mini- mize i adj and make it very constant with line and load changes. to do this, all quiescent operating current is returned to the output establishing a minimum load current requirement. if there is insufficient load on the output, the output voltage will ri se. since the ka350 is a floating regulator, it is only the voltage differential across the circuit which is important to performance, and operation at high voltage with respect to ground is possible. since i adj is controlled to less than 100 a, the error associated with this term is negligible in most applications. input output
ka350 6 mechanical dimensions (continued) 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 ] to-220
ka350 7 ordering information product number package operating temperature ka350 to-220 0 c to + 125 c
ka350 6/1/01 0.0m 001 stock#dsxxxxxxxx ? 2001 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.
product folder - fairchild p/n ka350 - 3-terminal 3a positive adjustable voltage regulator fairchild semiconductor space space space search | parametric | cross reference space product folders and datasheets application notes space space space find products home >> find products >> space space space space products groups space analog and mixed signal discrete interface logic microcontrollers non-volatile memory optoelectronics markets and applications new products product selection and parametric search cross-reference search technical information buy products technical support my fairchild company ka350 3-terminal 3a positive adjustable voltage regulator related links request samples dotted line how to order products dotted line product change notices (pcns) dotted line support dotted line distributor and field sales representatives dotted line quality and reliability dotted line design tools contents general description | features | product status/pricing/packaging general description the ka350 is an adjustable 3-terminal positive voltage regulator capable of supplying in excess of 3.0a over an output voltage range of 1.2v to 33 v back to top features l output adjustable between 1.2v and 33v l guaranteed 3a output current l internal thermal overload protection l load regulation (typ: 0.1%) l line regulation (typ: 0.015%/v) l internal short-circuit current limit l output transistor safe-area compensation back to top space datasheet download this datasheet pdf e-mail this datasheet [e- mail] this page print version product status/pricing/packaging product product status package type leads packing method KA350TU full production to-220 3 rail ka350 full production to-220 3 bulk back to top file:///e|/new/html/ka350.html (1 of 2) [7/26/02 12:02:27 pm]
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