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fp6201 switching boost regulator this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.91 1/12 general description the fp6201 is a boost topology switching regulat or for wide operating voltage applications. the fp6201 includes a high current n-mosfet, a high precision reference (0.5v) for comparing output voltage with feedback amplifier, an internal dead -time control and oscillator for controlling the maximum duty cycle and pwm frequency. it also has power on programmable soft start time, short circuit nmos turn-off and auto re-start protection functions. features ? wide supply voltage operating range: 3.6 to 20v ? built-in n-mosfet for 2a loading capability ? precision feedback reference voltage: 0.5v (2%) ? internal fixed oscillator frequency: 320khz (typ.) ? low current consumption: 3ma ? programmable soft-start function (ss) ? short circuit shutdown and auto re-start function(arscp) ? output adjustable to 20v ? over current protection ? package: sop-8l typical application
fp6201 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.91 2/12 1 2 3 4 8 7 6 5 v cc ss / scp fb comp lx lx gnd gnd fp6201 9fa-86l top view function block diagram 1.25v output drive control circuits soft start & auto re-start s.c.p. circuits reference regulator oscillator v cc fb 0.5v 50 0 36 k comp gnd gnd ss / scp 0.7v lx lx thermal shuntdown pin descriptions sop-8l name no. i / o description v cc 1 p ic power supply ss / scp 2 i connecting with a soft-start & arscp timing capacitor fb 3 i error amplifier inverting input comp 4 o error amplifier compensation output gnd 5 p ic ground gnd 6 p ic ground lx 7 o switch output lx 8 o switch output
fp6201 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.91 3/12 marking information sop-8l halogen free lot number per-half month year fp6201 internal id - halogen free : halogen free product indicator lot numbe r : wafer lot number?s last two digits for example: 132386tb ? 86 internal id : internal identification code per-half month : production period indicated in half month time unit for example: january a (front half month), b (last half month) february c (front half month), d (last half month) y ea r : production year?s last digit
fp6201 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.91 4/12 ordering information part number operating temperature package moq description FP6201DR-LF -40 c ~ +85 c sop-8l 2500ea tape & reel absolute maximum ratings parameter symbol conditions min. typ. max. unit power supply voltage v cc +20 v nmos drain sink current +3 a lx to gnd v lx 20 v error amplifier inverting input v fb -0.3 1.2 v allowable dissipation (sop-8l ) t a Q +25 650 mw thermal resistance junction to ambient ja +175 c / w thermal resistance junction to case jc +55 / w storage temperature t s -55 +125 esd susceptibility hbm (human body mode) 2 kv mm (machine mode) 200 v lead temperature (soldering, 10 sec) +260 ir re-flow soldering curve
fp6201 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.91 5/12 recommended operating conditions parameter symbol conditions min. typ. max. unit supply voltage v cc 3.6 +20 v operating temperature -10 +85 dc electrical characteristics (v in =20v, t a = 25 , unless otherwise noted) parameter symbol test conditions min. typ. max. unit reference output voltage v ref comp connected to fb 0.490 0.5 0.510 v input regulation v ref v cc 3.0 v to 20 v 2 12.5 mv output voltage change with temperature v ref / v ref t a -10 to 25 1 2 % t a 25 to 85 1 2 soft start section (s.s.) s.s. source current i ss v ss = 0v -15 -10 -7 a soft start threshold voltage v sst 0.8 0.9 1.0 v short circuit protection section (s.c.p.) s.c.p. source current i scp v scp = 0v -15 -10 -7 a scp re-start / hold time t rs / t hold v comp >0.8v 1 / 10 s.c.p. threshold voltage v scp v comp > 450mv 0.9 1.0 1.1 v v sb v comp < 450mv 0.1 0.15 oscillator section oscillation frequency f 320 khz frequency change with voltage f / v v cc =4v to 15v 5 % frequency change with temperature f / t t a =-10 to +85 5 % thermal shutdown section thermal shutdown temperature +145 error amplifier section input bias current i b -1.0 -0.2 1.0 a voltage gain av 100 v / v frequency bandwidth bw av=0 db 6 mhz output voltage swing ( positive) v pos v fb =0.3v 0.78 0.87 v output voltage swing ( negative) v neg v fb =0.7v 0.05 0.2 v output source current i source v comp =500mv -30 -45 a output sink current i sink v comp =500mv 30 45 a idle period adjustment section maximum duty cycle t duty v fb =0.2v 88 % total device section average supply current i ave 3.8 7 ma
fp6201 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.91 6/12 parameter symbol test conditions min. typ. max. unit output section nmos d-s voltage v dss 60 v nmos source current i d -2 a nmos on resistance r ds (on) v cc =4.5v, v fb =0v 49 64 m v cc =10v, v fb =0v 33 41 output leakage current i l scp active 5 a over current protection section nmos ocp current i ocp 3 a
fp6201 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.91 7/12 typical operating characteristics (v in =7v, t a =25 c , unless otherwise noted) power supply voltage vs reference output voltage 0.497 0.498 0.499 0.5 0.501 0.502 0.503 0.504 0.505 0.506 3.6 6 1012151720 power supply voltage (v) reference output voltage (v) reference output votlage vs tem perature 0.498 0.499 0.5 0.501 0.502 0.503 0.504 0.505 0.506 0.507 -25 25 45 65 85 100 tem perature ( ) reference output voltage (v) figure 1 figure 2 oscillator frequency vs power supply voltage 290 294 298 302 306 310 314 318 322 326 330 3.6 6 10 12 15 17 20 power supply voltage (v) oscillator frequency (khz) oscillator frequency vs tem perature 280 286 292 298 304 310 316 322 328 334 340 -25 25 45 65 85 100 tem perature ( ) oscillator frequency (khz) figure 3 figure 4 outupt load r egulation 10 10.5 11 11.5 12 12.5 13 13.5 14 14.5 15 15.5 16 16.5 0 0.3 0.6 0.9 1.2 1.5 output c urrent (a) output voltage (v) effciency vs output c urrent 83.00% 84.00% 85.00% 86.00% 87.00% 88.00% 89.00% 90.00% 91.00% 92.00% 93.00% 94.00% 95.00% 0.30.6 0.91.21.5 output c urrent (a) effciency (%) figure 5 figure 6 power supply vs oc p 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 5 5.5 7 9 12 15 18 20 power supply (v) ocp (a) ???????????? ocp v s te m pa ture 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8 4 4.2 4.4 -1025507085 tempature ( ) ocp (a) ? figure 7 figure 8 v cc =10v,v out =3.3v v cc =10v,v out =5.0v
fp6201 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.91 8/12 timing waveform osc v sst s.s / arscp soft start stage 3.6v v cc lx comp 0.8v v arscp arscp charge current hold stage soft start stage tre ~ ~ ~ ~ ~ ~ ~ ~ restart timing restart timing v arscp arscp charge current hold stage tre arscp lx osc
fp6201 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.91 9/12 application information voltage reference the fp6201 includes a 1.25v reference voltage generator. this voltage is connected to a resistive divider to generate a 0.5v precision reference voltage to the non-inverting input of error amplifier and 1.0v to the scp comparator. error amplifier the error amplifier compares a sample of the dc-dc converter?s output voltage with the 0.5v (v ref ) reference and generates an error signal fo r the pwm comparator. output voltage of dc-dc converter is setting by the resistor divi der with the following equation (figure 9): ref out v 2 r 1 r 1 v ? ? ? ? ? ? ? ? ? 3 4 0.5v 36ko 500o v out t r1 r2 c1 fp6201 error amplifier figure 9 error amplifier with feedback resistance divider
fp6201 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.91 10/12 oscillator the fixed pwm frequency is generated by an inter nal rc oscillator. its typical value is 320khz. soft start / short-circuit protection (s.s. / s.c.p.) the soft start is enabled after power on. the interval of soft start time is determined by a capacitor connected to scp pin. after the soft start finished, the internal soft start clamp voltage is setting high, but the external scp pin is discharged to low. t hus fp6201 turns on short circuit detection / protection function. the time of soft start is: ) f ( c 07 . 0 ) ms ( tss ? ? ? when a heavy loading or short circuit condition make output voltage to drop too much, the error amplifier output will rise to very hi gh. once comp pin voltage exceeds v pos (typ. 1.0v), the short circuit protection function is triggered. the output switching mos will be tu rned off. the scp capacitor will be charged until it potential exceeds scp threshold vo ltage (typ. 1.2v) and then discharged to ground. the time of short circuit protection is: ?? ) f ( c 09 . 0 isource c v v i c v t scp scp start ss th scp scp ? ? ? ? ? ? ? ? ? restart timing of short circuit protection is: ?? f c 8 . 1 tscp ? ? ? thermal protection when a heavy loading makes chip internal temperature exceeds 145 c , the thermal protection function is triggered. the fp6201 turn s off its output and starts short ci rcuit protection function. after the ic internal temperature is cooled down to below 145 c , it will turn on the output and execute soft-start function again. over current protection when fp6201 senses driver current larger than 3a, it will initia te ocp function and enters arscp function. after current drops below 3a, fp6201 tu rns on the output and cont inues pwm operation.
fp6201 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.91 11/12 typical application fp6201 basic dc-dc regulator circuit for example: the v in power supply is 5.0v and the v out is designed for 12v / 0.5a solution. the output voltage equation is: 12.02v 0.5v 2.43k ? 56k ? 1 v r r 1 v fb 2 1 out ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
fp6201 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.91 12/12 package outline sop-8l unit: mm note: 1. package dimensions are in compli ance with jedec outline: ms-012 aa. 2. dimension ?d? does not include moldi ng flash, protrusions or gate burrs. 3. dimension ?e? does not include inter-lead flash or protrusions. symbols min. (mm) max. (mm) a 1.346 1.752 a1 0.101 0.254 a2 1.498 d 4.800 4.978 e 3.810 3.987 h 5.791 6.197 l 0.406 1.270 0 8

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