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1/27 xc9501 series 2ch.step-up/up dc/dc controller ics general description the xc9501 series are pwm controlled, pwm/pfm automatic switching controlled, multi-functional, dual step-up dc/dc converter controller ics. with 0.9v ( 2%) of standard voltage supply internal, and using externally connected components, output voltage can be set freely on both dc/dc controllers between 1.5v to 30v. with a 180khz frequency, the size of the external components can be reduced. 100khz, 300khz and 500khz switching frequencies are also available as custom-designed products. the control of the xc9501 series can be switched between pwm control and pwm/pfm automatic switching control using external signals. control switches from pwm to pfm during light loads when automatic switching is selected and the series is highly efficient from light loads to large output currents. noise is easily reduced with pwm control since the switching frequency is fixed. the xc9501 series provides the option of being able to select the control suited to the application. soft-start time is internally set to 10msec which offers protection against rush currents when the power is switched on and also against voltage overshoot . applications pdas palm top computers portable audio systems various multi-function power supplies features 2ch dc/dc controller : (step-up + step-up) input voltage range : 0.9v ~ 10v supply voltage range : 2.0v ~ 10v output voltage range : 1.5v ~ 30v (set by fb1/fb2 pins) output current : more than 200ma (v in =1.8v, v out =3.3v) switching frequency : 180khz ( 15%) 100khz, 300khz & 500khz as custom maximum duty cycle : 80% (typ.) control method : pwm or pwm/pfm selectable high efficincy : 83% (typ.) stand-by current : 3.0 a (max.) soft-start : internally set-up package : msop-10, usp-10 typical application circuit ( xc9501b092a input: 2 cells, output : 3.3v, output : 5.0v ) efficiency vs. output current typical performance characteristics go-compatible etr0701_002
2/27 xc9501 series pin number pin name function 1 ext 1 channel 1: external transistor drive pin 2 v dd supply voltage 3 fb1 channel 1: output voltage monitor feedback pin 4 pwm1 channel 1: pwm/pfm switching pin 5 en1 channel 1: enable pin 6 en2 channel 2: enable pin 7 pwm2 channel 2: pwm/pfm switching pin 8 fb2 channel 2: output voltage monitor feedback pin 9 gnd ground 10 ext2 channel2: external transistor drive pin pin configuration designator description symbol description type of dc/dc controller b : standard (10 pin) output voltage 09 : fb voltage: 0.9v 1 : 100khz (custom) 2 : 180khz 3 : 300khz (custom) oscillation frequency 5 : 500khz (custom) a : msop-10 package d : usp-10 r : embossed tape, standard feed device orientation l : embossed tape, reverse feed product classification ordering information xc9501 ???? pin assignment usp-10 (bottom view)
3/27 x c9501 series absolute maximum ratings block diagram parameter symbol ratings units v dd pin voltage v dd - 0.3 ~ 12.0 v fb1, 2 pin voltage v fb - 0.3 ~ 12.0 v en1, 2 pin voltage v en - 0.3 ~ 12.0 v pwm1, 2 pin voltage v pwm - 0.3 ~ 12.0 v ext1, 2 pin voltage v ext - 0.3 ~ v dd + 0.3 v ext1, 2 pin current i ext 100 ma msop-10 150 power dissipation usp-10 pd 150 mw operating temperature range topr - 40 ~ + 85 storage temperature range tstg - 55 ~ + 125 ta = 2 5
4/27 xc9501 series electrical characteristics parameter symbol conditions min. typ. max. units circuit supply voltage (* 1) v dd 2.0 - 10.0 v - v dd R 2.0v i out 1,2=1ma v out1 , v out2 0.9 - - v v out1 2.0 - 10.0 v v in R 0.9v i out 1,2=1ma (* 2) v out2 0.9 - - v v out1 0.9 - - v output voltage range (* 4) v in R 0.9v i out 1,2=1ma (* 3) v out2 2.0 - 10.0 v supply current 1 i dd1 fb1, 2=0v - 70 100 a en1=3.0v, en2=0v, fb1=0v supply current 1-1 i dd1-1 en2=3.0v, en1=0v, fb2=0v - 50 80 a fb1=0v, fb2=1.0v supply current 1-2 i dd1-2 fb1=1v, fb2=0v - 80 150 a supply current 2 i dd2 fb1, 2=1.0v - 60 90 a stand-by current i stb same as i dd1 , en1=en2=0v - - 3.0 a oscillation frequency fosc same as i dd1 85 100 115 khz en1, 2 "high" voltage v enh fb1, 2=0v 0.65 - - v en1, 2 "low" voltage v enl fb1, 2=0v - - 0.20 v en1, 2 "high" current i enh fb1, 2=3.0v - - 0.50 a en1, 2 "low" current i enl en1, 2=0v, fb1, 2=3.0v - - -0.50 a pwm1, 2 "high" current i pwmh fb1, 2=3.0v, pwm=3.0v - - 0.50 a pwm1, 2 "low" current i pwml fb1, 2=3.0v, pwm=0v - - -0.50 a fb1, 2 "high" current i fbh fb1, 2=3.0v - - 0.50 a fb1, 2 "low" current v fbl fb1, 2=1.0v - - -0.50 a unless otherwise stated, v dd =3.0v, pwm1, 2=3.0v, en1, 2 = 3.0v xc9501b091a common characteristics parameter symbol conditions min. typ. max. units circuit fb1 voltage v fb1 v dd =3.0v, v in =1.5v, i out1 =10ma 0.882 0.900 0.918 v using tr: 2sd1628, i out =1.0ma, rfb11=200k , rfb12=75k - - 0.9 v operation start-up voltage 1 (* 2) v st1-1 v dd v out1 : i out1 =1ma - - 2.0 v oscillation start voltage 1 v st2-1 fb1=0v - - 0.8 v maximum duty ratio 1 maxdty1 same as i dd1 75 80 88 % pfm duty ratio 1 pfmdty1 no load, vpwm1=0v 22 30 38 % efficiency 1 effi1 i out1 =100ma n-ch mosfet: xp161a1355p - 83 - % soft-start time 1 tss1 v out1 0.95v, en1=0v 0.65v 5.0 10.0 20.0 ms ext1 "high" on resistance r extbh1 fb1=0, ext1=v dd -0.4v - 28 47 ext1 "low" on resistance r extbl1 en1=fb2=0v, ext1=0.4v - 22 30 pwm1 "high" voltage v pwmh1 no load 0.65 - - v pwm1 "low" voltage v pwml1 no load - - 0.20 v unless otherwise stated, v dd =en1=pwm1=3.0v, en2=pwm2=gnd, ext2=open, fb2=open, v in =1.8v output 1 characteristics step-up controller parameter symbol conditions min. typ. max. units circuit fb2 voltage v fb2 v dd =3.0v, v in =1.5v, i out1 =10ma 0.882 0.900 0.918 v using tr: 2sd1628, i out1 =1.0ma, r fb21 =200k ,r fb22 =75k - - 0.9 v operation start-up voltage2 (* 3) v st1-2 v dd v out2 : i out2 =1ma - - 2.0 v oscillation start voltage 2 v st2-2 fb2=0v - - 0.8 v maximum duty ratio 2 maxdty2 same as i dd1 75 80 85 % pfm duty ratio 2 pfmdty2 no load, v pw m 2=0v 22 25 38 % efficiency 2 effi2 i out2 =100ma, n-ch mosfet: xp161a1355p - 83 - % soft-start time 2 tss2 v out1 0.95v, en2=0v 0.65v 5.0 10.0 20.0 ms ext2 "high" on resistance r extbh2 fb2=0, ext2=v dd -0.4v - 28 47 ext2 "low" on resistance r extbl2 en2=fb2=0v, ext2=0.4v - 22 30 pwm2 "high" voltage v pwmh2 no load 0.65 - - v pwm2 "low" voltage v pwml2 no load - - 0.20 v unless otherwise stated, v dd =en2=pwm2=3.0v, pwm1=en1=gnd, ext1=open, fb1=open, v in =1.8v output 2 characteristics step-up controller ta = 2 5 (fosc = 100khz) ta = 2 5 (fosc = 100khz) ta = 2 5 (fosc = 100khz)
5/27 x c9501 series electrical characteristics (continued) parameter symbol conditions min. typ. max. units circuit supply voltage (* 1) v dd 2.0 - 10.0 v - v dd R 2.0v i out 1,2=1ma v out1 , v out2 0.9 - - v v out1 2.0 - 10.0 v v in R 0.9v i out 1,2=1ma (* 2) v out2 0.9 - - v v out1 0.9 - - v output voltage range (* 4) v in R 0.9v i out 1,2=1ma (* 3) v out2 2.0 - 10.0 v supply current 1 i dd1 fb1, 2=0v - 90 160 a en1=3.0v, en2=0v, fb1=0v supply current 1-1 i dd1-1 en2=3.0v, en1=0v, fb2=0v - 60 120 a fb1=0v, fb2=1.0v supply current 1-2 i dd1-2 fb1=1v, fb2=0v - 80 150 a supply current 2 i dd2 fb1, 2=1.0v - 70 132 a stand-by current i stb same as i dd1 , en1=en2=0v - - 3.0 a oscillation frequency fosc same as i dd1 153 180 207 khz en1, 2 "high" voltage v enh fb1, 2=0v 0.65 - - v en1, 2 "low" voltage v enl fb1, 2=0v - - 0.20 v en1, 2 "high" current i enh fb1, 2=3.0v - - 0.50 a en1, 2 "low" current i enl en1, 2=0v, fb1, 2=3.0v - - -0.50 a pwm1, 2 "high" current i pwmh fb1, 2=3.0v, pwm=3.0v - - 0.50 a pwm1, 2 "low" current i pwml fb1, 2=3.0v, pwm=0v - - -0.50 a fb1, 2 "high" current i fbh fb1, 2=3.0v - - 0.50 a fb1, 2 "low" current v fbl fb1, 2=1.0v - - -0.50 a unless otherwise stated, v dd =3.0v, pwm1, 2=3.0v, en1, 2 = 3.0v xc9501b092a common characteristics parameter symbol conditions min. typ. max. units circuit fb1 voltage v fb1 v dd =3.0v, v in =1.5v, i out1 =10ma 0.882 0.900 0.918 v using tr: 2sd1628, i out =1.0ma, rfb11=200k , rfb12=75k - - 0.9 v operation start-up voltage 1 (* 2) v st1-1 v dd v out1 : i out1 =1ma - - 2.0 v oscillation start voltage 1 v st2-1 fb1=0v - - 0.8 v maximum duty ratio 1 maxdty1 same as i dd1 75 80 88 % pfm duty ratio 1 pfmdty1 no load, vpwm1=0v 22 30 38 % efficiency 1 effi1 i out1 =100ma n-ch mosfet: xp161a1355p - 83 - % soft-start time 1 tss1 v out1 0.95v, en1=0v 0.65v 5.0 10.0 20.0 ms ext1 "high" on resistance r extbh1 fb1=0, ext1=v dd -0.4v - 28 47 ext1 "low" on resistance r extbl1 en1=fb2=0v, ext1=0.4v - 22 30 pwm1 "high" voltage v pwmh1 no load 0.65 - - v pwm1 "low" voltage v pwml1 no load - - 0.20 v unless otherwise stated, v dd =en1=pwm1=3.0v, en2=pwm2=gnd, ext2=open, fb2=open, v in =1.8v output 1 characteristics step-up controller parameter symbol conditions min. typ. max. units circuit fb2 voltage v fb2 v dd =3.0v, v in =1.5v, i out1 =10ma 0.882 0.900 0.918 v using tr: 2sd1628, i out1 =1.0ma, r fb21 =200k ,r fb22 =75k - - 0.9 v operation start-up voltage2 (* 3) v st1-2 v dd v out2 : i out2 =1ma - - 2.0 v oscillation start voltage 2 v st2-2 fb2=0v - - 0.8 v maximum duty ratio 2 maxdty2 same as i dd1 75 80 85 % pfm duty ratio 2 pfmdty2 no load, v pw m 2=0v 22 25 38 % efficiency 2 effi2 i out2 =100ma, n-ch mosfet: xp161a1355p - 83 - % soft-start time 2 tss2 v out1 0.95v, en2=0v 0.65v 5.0 10.0 20.0 ms ext2 "high" on resistance r extbh2 fb2=0, ext2=v dd -0.4v - 28 47 ext2 "low" on resistance r extbl2 en2=fb2=0v, ext2=0.4v - 22 30 pwm2 "high" voltage v pwmh2 no load 0.65 - - v pwm2 "low" voltage v pwml2 no load - - 0.20 v unless otherwise stated, v dd =en2=pwm2=3.0v, pwm1=en1=gnd, ext1=open, fb1=open, v in =1.8v output 2 characteristics step-up controller ta = 2 5 (fosc = 180khz) ta = 2 5 (fosc = 180khz) ta = 2 5 (fosc = 180khz)
6/27 xc9501 series parameter symbol conditions min. typ. max. units circuit supply voltage (* 1) v dd 2.0 - 10.0 v v dd R 2.0v, i out1, 2 =1ma v out1 , v out2 0.9 - - v v out1 2.0 - 10.0 v vin R 0.9v, i out1, 2 =1ma (* 2) v out2 0.9 - - v v out1 0.9 - - v output voltage range (* 4) v outset v in R 0.9v, i out1, 2 =1ma (* 3) v out2 2.0 - 10.0 v supply current 1 i dd1 fb1, 2=0v - 110 250 a en1=3.0v, en2=0v, fb1=0v supply current 1-1 i dd1-1 en2=3.0v, en1=0v, fb2=0v - 80 150 a fb1=0v, fb2=1.0v supply current 1-2 i dd1-2 fb1=1.0v, fb2=0v - 90 200 a supply current 2 i dd2 fb1, 2=1.0v - 80 160 a stand-by current i stb same as i dd1 , en1=en2=0v - - 3.0 a oscillation frequency fosc same as i dd1 255 300 345 khz en1, 2 "high" voltage v enh fb1, 2=0v 0.65 - - v en1, 2 "low" voltage v enl fb1, 2=0v - - 0.20 v en1, 2 "high" current i enh fb1, 2=3.0v - - 0.50 a en1, 2 "low" current i enl en1, 2=0v, fb1, 2=3.0v - - -0.50 a pwm1, 2 "high" current i pwmh fb1, 2=3.0v, pwm=3.0v - - 0.50 a pwm1, 2 "low" current i pwml fb1, 2=3.0v,pwm=0v - - -0.50 a fb1, 2 "high" current i fbh fb1, 2=3.0v - - 0.50 a fb1, 2 "low" current v fbl fb1, 2=1v - - -0.50 a unless otherwise stated, v dd =3.0v, pwm1, 2=3.0v, en1, 2 =3.0v xc9501b093a common characteristics parameter symbol conditions min. typ. max. units circuit fb2 voltage v fb2 v dd =3.0v, v in =1.5v, i out2 =10ma 0.882 0.900 0.918 v using tr: 2sd1628, i out2 =1.0ma, r fb21 =200k ,r fb22 =75k - - 0.9 v operation start voltage 2 (* 3) v st1-2 v dd v out2 : i out2 =1ma - - 2.0 v oscillation start-up voltage2 v st2-2 fb2=0v - - 0.8 v maximum duty ratio 2 maxdty2 same as i dd1 75 80 85 % pfm duty ratio 2 pfmdty2 no load, v pw m2 =0v 22 30 38 % efficiency 2 effi2 iout2=100ma, n-ch mosfet: xp161a1355p - 83 - % soft-start time 2 tss2 vout2 0.95v, en2=0v 0.65v 5.0 10.0 20.0 ms ext2 "high" on resistance r extbh2 fb2=0, ext2=v dd -0.4v - 28 47 ext2 "low" on resistance r extbl2 en2=fb2=0v, ext2=0.4v - 22 30 pwm2 "high" voltage v pwmh2 no load 0.65 - - v pwm2 "low" voltage v pwml2 no load - - 0.20 v unless otherwise stated, v dd =en2=pwm2=3.0v, pwm1=en1=gnd, ext1=open, fb1=open, v in =1.8v parameter symbol conditions min. typ. max. units circuit fb1 voltage v fb1 v dd =3.0v, v in =1.5v, i out1 =10ma 0.882 0.900 0.918 v using tr: 2sd1628, i out =1.0ma, r fb11 =200k , r fb12 =75k - - 0.9 v operation start voltage 1 (* 2) v st1-1 v dd v out1 : i out1 =1ma - - 2.0 v oscillation start voltage 1 v st2-1 fb1=0v - - 0.8 v maximum duty ratio 1 maxdty1 same as i dd1 75 80 85 % pfm duty ratio 1 pfmdty1 no load, vpwm1=0v 22 30 38 % efficiency 1 effi1 i out1 =100ma, n-ch mosfet: xp161a1355p - 83 - % soft-start time 1 tss1 v out1 0.95v, ce1=0v 0.65v 5.0 10.0 20.0 ms ext1 "high" on resistance r extbh1 fb1=0, ext1=v dd -0.4v - 28 47 ext1 "low" on resistance r extbl1 en1=fb2=0v, ext1=0.4v - 22 30 pwm1 "high" voltage v pwmh1 no load 0.65 - - v pwm1 "low" voltage v pwml1 no load - - 0.20 v unless otherwise stated, v dd =en1=pwm1=3.0v, en2=pwm2=gnd, ext2=open, fb2=open, v in =1.8v output 1 characteristics step-up controller output 2 characteristics step-up controller ta = 2 5 (fosc = 300khz) ta = 2 5 ta = 2 5 (fosc = 300khz) (fosc = 300khz) electrical characteristics (continued)
7/27 x c9501 series parameter symbol conditions min. typ. max. units circuit fb1 voltage v fb1 v dd =3.0v, v in =1.5v, i out1 =10ma 0.882 0.900 0.918 v using tr: 2sd1628, i out =1.0ma, r fb11 =200k , r fb12 =75k - - 0.9 v operation start voltage 1 (* 2) v st1-1 v dd v out1 : i out1 =1ma - - 2.0 v oscillation start voltage 1 v st2-1 fb1=0v - - 0.8 v maximum duty ratio 1 maxdty1 same as i dd1 75 80 85 % pfm duty ratio 1 pfmdty1 no load, vpwm1=0v 22 30 38 % efficiency 1 effi1 i out1 =100ma, n-ch mosfet: xp161a1355p - 83 - % soft-start time 1 tss1 v out1 0.95v, ce1=0v 0.65v 5.0 10.0 20.0 ms ext1 "high" on resistance r extbh1 fb1=0, ext1=v dd -0.4v - 28 47 ext1 "low" on resistance re xtbl1 en1=fb2=0v, ext1=0.4v - 22 30 pwm1 "high" voltage v pwmh1 no load 0.65 - - v pwm1 "low" voltage v pwml1 no load - - 0.20 v unless otherwise stated, v dd =en1=pwm1=3.0v, en2=pwm2=gnd, ext2=open, fb2=open, v in =1.8v electrical characteristics (continued) parameter symbol conditions min. typ. max. units circuit supply voltage (* 1) v dd 2.0 - 10.0 v v dd R 2.0v, i out1, 2 =1ma v out1 , v out2 0.9 - - v v out1 2.0 - 10.0 v v in R 0.9v, i out1, 2 =1ma (* 2) v out2 0.9 - - v v out1 0.9 - - v output voltage range (* 4) v outset v in R 0.9v, i out1, 2 =1ma (* 3) v out2 2.0 - 10.0 v supply current 1 i dd1 fb1, 2=0v - 165 350 a en1=3.0v, en2=0v, fb1=0v supply current 1-1 i dd1-1 en2=3.0v, en1=0v, fb2=0v - 110 220 a fb1=0v, fb2=1.0v supply current 1-2 i dd1-2 fb1=1.0v, fb2=0v - 130 270 a supply current 2 i dd2 fb1, 2=1.0v - 100 200 a stand-by current i stb same as i dd1 , en1=en2=0v - - 3.0 a switching frequency fosc same as i dd1 425 500 575 khz en1, 2 "high" voltage v enh fb1, 2=0v 0.65 - - v en1, 2 "low" voltage v enl fb1, 2=0v - - 0.20 v en1, 2 "high" current i enh fb1, 2=3.0v - - 0.50 a en1, 2 "low" current i enl en1, 2=0v, fb1,2=3.0v - - -0.50 a pwm1, 2 "high" current i pwmh fb1, 2=3.0v, pwm=3.0v - - 0.50 a pwm1, 2 "low" current ipwml fb1, 2=3.0v,pwm=0v - - -0.50 a fb1, 2 "high" current i fbh fb1, 2=3.0v - - 0.50 a fb1, 2 "low" current v fbl fb1, 2=1.0v - - -0.50 a unless otherwise stated, v dd =3.0v, pwm1, 2=3.0v, en1, 2 =3.0v parameter symbol conditions min. typ. max. units circuit fb2 voltage v fb2 v dd =3.0v, v in =1.5v, i out2 =10ma 0.882 0.900 0.918 v using tr: 2sd1628, i out2 =1.0ma, r fb21 =200k ,r fb22 =75k - - 0.9 v operation start voltage 2 (* 3) v st1-2 v dd v out2 : i out2 =1ma - - 2.0 v oscillation start voltage 2 v st2-2 fb2=0v - - 0.8 v maximum duty ratio 2 maxdty2 same as i dd1 75 80 85 % pfm duty ratio 2 pfmdty2 no load, v pw m2 =0v 22 30 38 % efficiency 2 effi2 i out2 =100ma, n-ch mosfet: xp161a1355p - 83 - % soft-start time 2 tss2 v out2 0.95v, en2=0v 0.65v 5.0 10.0 20.0 ms ext2 "high" on resistance r extbh 2 fb2=0, ext2=v dd -0.4v - 28 47 ext2 "low" on resistance r extbl2 en2=fb2=0v, ext2=0.4v - 22 30 pwm2 "high" voltage v pwmh2 no load 0.65 - - v pwm2 "low" voltage v pwml2 no load - - 0.20 v unless otherwise stated, v dd =en2=pwm2=3.0v, pwm1=en1=gnd, ext1=open, fb1=open, v in =1.8v output 1 characteristics step-up controller output 2 characteristics step-up controller ta = 2 5 (fosc = 500khz) ta = 2 5 ta = 2 5 xc9501b095a common characteristics (fosc = 500khz) (fosc = 500khz)
8/27 xc9501 series notes: * 1: although the ic's step-up operations start from a v dd of 0.8v, the output voltage and switching frequency are stabilized at v dd R 2.0v. therefore, a v dd of more than 2.0v is recommended when v dd is supplied from v in or other power sources. * 2: although the ic's switching operations start from a v in of 0.9v, the ic's power supply pin (v dd ) and output voltage monitor pin (fb1) should be connected to v out1 . with operations from v in =0.9v, the 2nd channel's (output 2) en2 pin should be set to disable. once output voltage v out1 is more than 2.0v, the en2 pin should be set to enable. * 3: although the ic's switching operations start from a v in of 0.9v, the ic's power supply pin (v dd ) and output voltage monitor pin (fb2) should be connected to v out2 . with operations from v in =0.9v, the 1st channel's (output 1 en1 pin should be set to disable. once output voltage v out2 is more than 2.0v, the en1 pin should be set to enable. * 4: please be careful not to exceed the breakdown voltage level of the external components. we recommend, as a guideline, that a level equal to more than 3 times that of the set output voltage be used. * 5: effi={ [ (output voltage) x (output current) ] / [ (input voltage) x (input current) ] } x 100 typical application circuits v dd =v out1 connection example v dd =v in connection example electrical characteristics (continued)
9/27 x c9501 series operational explanation the xc9501series are multi-functional, 2 channel step-up dc/dc c onverter controller ics with built-in high speed, low on resistance drivers. the error amplifier is designed to monitor the output voltage and it compares the feedback voltage (fb) with the reference voltage. in response to feedback of a voltage lower than the reference voltage, the output voltage of the error amp. decreases. this circuit generates the switching frequency, which in turn generates the reference clock. the ramp wave generator generates a saw-tooth waveform based on outputs from the phase shift generator. the pwm comparator compares outputs from the error amp. and saw-tooth waveform. when the voltage from the error am p 's out p ut is low, the external switch will be set to on. this circuit generates pfm pulses. control can be switched between pwm control and pwm/pfm automatic switching control using external signals. the pwm/pfm automatic switching mode is selected when the voltage of the pwm1 (2) pin is less than 0.2v, and the control switches between pwm and pfm automatically depending on the load. as the pfm circuit generates pulses based on outputs from the pwm comparator, shifting between modes occurs smoothly. pwm control mode is selected when the voltage of the pwm1 (2) pin is more than 0.65v. noise is easily reduced with pwm control since the switching frequency is fixed. control suited to the application can easily be selected which is useful in audio applications, for example, where traditionall y, efficiencies have been sacrificed during stand-by as a result of using pwm control (due to the noise problems associated with the pfm mode in stand-by). the reference voltage, vref (fb pin voltage)=0.9v, is adjusted and fixed by laser trimming (for output voltage settings, please refer to the notes on next page). to protect against inrush current, when the power is switched on, and also to protect against voltage overshoot, soft-start time is set internally to 10ms. it should be noted, however, that this circuit does not protect the load capacitor (c l ) from inrush current. with the vref voltage limited and depending upon the input to the error amps, the operation maintains a balance between the two inputs of the error amps and controls the ext pin's on time so that it doesn't increase more than is necessary. this function controls the operation and shutdown of the ic. when the voltage of the en1 or en2 pins is 0.2v or less, the mode will be disable, the channel's operations will stop and the ext pin will be kept at a low level (the external n-ch mosfet will be off). when both en1 and en2 are in a state of disable, current consumption will be no more than 3.0 a. when the en1 or en2 pin's voltage is 0.65v or more, the mode will be enable and operations will recommence. with soft-start, 95% of the set output voltage will be reached within 10ms (typ.) from the moment of enable. the start-up sequence for en1 and en2 is required when operations begin with a power supply voltage of v dd <2.0v or less. although ic 1 starts oscillation from a vin of 0.9v, the ic's power supply pin (v dd ) and the output voltage monitor pin (fb1) should be connected to v out1 . when the ic starts operations from a vin of 0.9v, set channel two's (output 2) en2 pin to disable and turn it to enable when v out1 is more than 2.0v. conversely, when ic 2's power supply pin (v dd ) and output voltage monitor pin (fb2) are connected to v out2 , set channel one's (output 1) en1 pin to disable and turn it to enable when v out2 is more than 2.0v. for power supply voltages of v dd <2.0v, oscillation may occur irrespective of the fb pin voltage. should this happen, you may find that output voltage will be higher than the set voltage. the fb pin voltage and the reference voltage vref will be compared and output voltage will be controlled when the power supply voltage is v dd >2.0v or more. with power supply voltages of v dd >2.0v, the start-up sequence for en1 and en2 will not be required.
10/27 xc9501 series output voltage can be set by adding external split resistors. output voltage is determined by the following equation, based on the values of r fb11 (r fb21 ) and r fb12 (r fb22 ). the sum of r fb11 (r fb21 ) and r fb12 (r fb22 ) should normally be 1m or less. v out = 0.9 (r fb11 +r fb12 ) /r fb12 the value of c fb1 (c fb2 ), speed-up capacitor for phase compensation, should be resulted fzfb=1/(2 c fb1 r fb11 ) equal to 12khz. adjustments are required from 1khz to 50khz depending on the application, value of inductance (l), and value of load capacity (c l ). [example of calculation] when r fb11 =200k and r fb12 =75k , v out1 =0.9 (200k+75k) / 75k=3.3v. [typical example] v out (v) r fb11 (k ) r fb12 (k ) c fb1 (pf) v out (v) r fb11 (k ) r fb12 (k ) c fb1 (pf) v out (v) r fb11 (k ) r fb12 (k ) c fb1 (pf) 1.5 220 330 62 2.7 360 180 33 12.0 160 13 82 1.8 220 220 62 3.0 560 240 24 - - - - 2.0 330 270 39 3.3 200 75 62 - - - - 2.2 390 270 33 5.0 82 18 160 - - - - 2.5 390 220 33 8.0 120 15 100 - - - - the same method can be also adopted for channel two (output 2). [external components] tr : * mosfet xp161a1355pr (n-ch power mosfet, torex) note: v gs breakdown voltage of this transistor is 8v so please be careful with the power supply voltage. if the power supply voltage is more than 6v, please use xp161a1265pr, where v gs breakdown voltage is 12v. v st1 of xp161a1355pr is 1.2v (max.) and that of xp161a1265pr is 1.5v (max.) sd : ma2q737 (schottky, matsushita) cms02 (schottky, toshiba) l : 47 h (cdrh5d28, sumida, fosc = 100khz) 22 h (cdrh5d28, sumida, fosc = 180khz) 15 h (cdrh5d28, sumida, fosc = 300khz) 10 h (cdrh5d28, sumida, fosc = 500khz) cl : 16v, 47 f (tantalum, nichichemi, mce series) increase capacity according to the equation below when the step-up voltage ratio is large and output current is high. c l = (c l standard value) (i out (ma) / 300ma v out /v in ) * npn transistor 2sd1628 (sanyo) r b : 500 (adjust in accordance with load & tr.'s hfe.) c b : 2200pf (ceramic) set up according to the equation below. c b Q 1/(2 r b fosc 0.7) operational explanation (continued)
11/27 x c9501 series test circuits
12/27 xc9501 series test circuits (continued)
13/27 x c9501 series external components circuit 1, circuit 2, and circuit 3 l1, l2 : 47 h (cdrh5d28, sumida) : xc9501b091a 22 h (cdrh5d28, sumida) : xc9501b092a 15 h (cdrh5d28, sumida) : xc9501b093a 10 h (cdrh5d28, sumida) : xc9501b095a sd1, sd2 : crs02 (schottky diode, toshiba) ec10qs06 (schottky diode, nihon inter) cl1, cl2 : 16mce476md2 (tantalum, nihon chemicon) 35mce335mb2 (tantalum, nihon chemicon) c in : 16mce476md2 (tantalum, nihon chemicon) npn tr1, 2: 2sa1628 (sanyo) cph3215 (sanyo) cph3210 (sanyo) r fb : please use by the conditions as below. r fb11 + r fb12 Q 1m r fb21 + r fb22 Q 1m r fb11 / r fb12 = (setting output voltage / 0.9) -1 r fb21 / r fb22 = (setting output voltage / 0.9) - 1 c fb : please adjust as below: fzfb=1/(2 c fb1 r fb11 ) = 1khz ~50khz ( 12khz usual) fzfb=1/(2 c fb2 r fb21 ) = 1khz ~50khz ( 12khz usual) circuit 6 and circuit 9 l1, l2 : 47 h (cdrh5d28, sumida) : xc9501b091a 22 h (cdrh5d28, sumida) : xc9501b092a 15 h (cdrh5d28, sumida) : xc9501b093a 10 h (cdrh5d28, sumida) : xc9501b095a sd1, sd2: ma2q737 (schottky diode, matsushita) cl1, cl2 : 16mce476md2 (tantalum, nihon chemicon) c in : 16mce476md2 (tantalum, nihon chemicon) n-ch mosfet1 : xp161a1355p (torex) circuit 5 and circuit 8 l1, l2 : 22 h (cdrh5d28, sumida) sd1, sd2 : ma2q737 (schottky diode, matsushita) cl1, cl2 : 16mce476md2 (tantalum, nihon chemicon) c in : 16mce476md2 (tantalum, nihon chemicon) n-ch mosfet1 : xp161a1355p (torex) 1. pwm/pfm automatic switching if pwm/pfm automatic switching control is selected and the step-up ratio is low (e.g., from 4.5 v to 5.0 v), the control mode remains in pfm setting over the whole load range, since the duty ratio under continuous-duty condition is smaller than the pfm duty ratio of the xc9501 series. the output voltage's ripple voltage becomes substantially high under heavy load conditions, with the xc9501 series appearing to be producing an abnormal oscillation. if this operation becomes a concern, set pins pwm to high to set the control mode to pwm setting. for use under the above-mentioned condition, measured data of pwm/pfm automatic switching control shown on the data sheets are available up to i out = 100 ma. 2. ratings use the xc9501 series and peripheral components within the limits of their ratings. notes on use
14/27 xc9501 series fosc=180khz, v out1, 2 = 5.0v 4.7 4.8 4.9 5.0 5.1 5.2 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) output voltage1, 2 vout1, 2 (v) 2.7v vin=1.5v l=22 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 4.2v 3.3v pwm/pfm switching control pwm contr ol fosc=180khz, v out1, 2 = 8.0v 7.7 7.8 7.9 8.0 8.1 8.2 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) output voltage1, 2 v out1, 2 (v) l=22 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1265p 4.2v vin=3.3v 5.0v pwm/pfm switching contr ol pwm contr ol fosc=180khz, v out1, 2 = 3.3v 3.0 3.1 3.2 3.3 3.4 3.5 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) output voltage1, 2 v out1, 2 (v) l=22 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p vin=0.9v 1.2v,1.5v 2.7v pwm/pfm switching control pwm contr ol typical performance characteristics (1) output voltage vs. output current dotted arrowhead pwm/pfm switching control fosc=180khz, v out1, 2 = 1.5v 1.2 1.3 1.4 1.5 1.6 1.7 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) output voltage1, 2 v out1, 2 (v) l=22 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 1.2v vin=0.9v pwm/pfm switching control pwm control fosc=180khz, v out1, 2 = 2.5v 2.2 2.3 2.4 2.5 2.6 2.7 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) output voltage1, 2 v out1 , 2 (v) l=22 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p vin=0.9v 1.2v 1.5v pwm/pfm switching contr ol pwm contr ol
15/27 x c9501 series (1) output voltage vs. output current (continued) fosc=300khz, v out1, 2 = 2.5v 2.2 2.3 2.4 2.5 2.6 2.7 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) output voltage1, 2 v out1, 2 (v) l=15 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 1.2v vin=0.9v 1.5v pwm/pfm switching control pwm contr ol fosc=300khz, v out1, 2 = 3.3v 3.0 3.1 3.2 3.3 3.4 3.5 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) output voltage1, 2 v out1, 2 (v) l=15 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 1.2v vin=0.9v 2.7v 1.5v pwm/pfm switching contr ol pwm contr ol fosc=300khz, v out1, 2 = 5.0v 4.7 4.8 4.9 5.0 5.1 5.2 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) output voltage1, 2 v out1, 2 (v) l=15 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 1.5v vin=1.2v 3.3v 2.7v 4.2v pwm/pfm switching control pwm contr ol fosc=500khz, v out1, 2 = 2.5v 2.2 2.3 2.4 2.5 2.6 2.7 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) output voltage1, 2 v out1, 2 (v) l=10 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 1.2v vin=0.9v 1.5v pwm/pfm switching contr ol pwm contr ol fosc=500khz, v out1, 2 = 3.3v 3.0 3.1 3.2 3.3 3.4 3.5 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) output voltage1, 2 v out1, 2 (v) 1.5v vin=0.9v 1.2v 2.7v pwm/pfm switching control pwm contr ol l=10 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p fosc=500khz, v out1, 2 = 5.0v 4.7 4.8 4.9 5.0 5.1 5.2 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) output voltage1, 2 v out1, 2 (v) l=10 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 1.5v vin=0.9v 3.3v 2.7v 4.2v 1.2v pwm/pfm switching contr ol pwm contr ol typical performance characteristics (continued) dotted arrowhead pwm/pfm switching control
16/27 xc9501 series fosc=180khz, v out1, 2 = 8.0v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) efficiency1, 2 e ffi 1, 2 (%) l=22 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1265p 4.2v vin=3.3v 5.0v pwm/pfm switching control pwm control (2) efficiency vs. output current fosc=180khz, v out1, 2= 1.5v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) efficiency1, 2 e ffi 1, 2 (%) 1.2v vin=0.9v l=22 h(cdrh5d28), c l =94 f(tantalum) sd:cms02, tr:xp161a1355p pwm/pfm switching control pwm control fosc=180khz, v out1, 2 = 2.5v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) efficiency1, 2 e ffi 1, 2 (%) l=22 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 1.2v vin=0.9v 1.5v pwm/pfm switching control pwm control fosc=180khz, v out1, 2 = 3.3v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) efficiency1, 2 e ffi 1, 2 (%) l=22 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 1.5v vin=0.9v 2.7v 1.2v pwm/pfm switching control pwm control fosc=180khz, v out1, 2 = 5.0v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) efficiency1, 2 e ffi 1, 2 (%) l=22 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 2.7v vin=1.5v 3.3v 4.2v pwm/pfm switching control pwm control typical performance characteristics (continued) dotted arrowhead pwm/pfm switching control
17/27 x c9501 series (2) efficiency vs. output current (continued) dotted arrowhead pwm/pfm switching control fosc=300khz, v out1, 2 = 2.5v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) efficiency1, 2 e ffi 1, 2 (%) l=15 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 1.2v vin=0.9v 1.5v pwm/pfm switching control pwm control fosc=300khz, v out1, 2 = 3.3v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) efficiency1, 2 e ffi 1, 2 (%) l=15 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 1.2v vin=0.9v 1.5v 2.7v pwm/pfm switching control pwm control fosc=300khz, v out1, 2 = 5.0v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) efficiency1, 2 e ffi 1, 2 (%) l=15 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 1.5v vin=1.2v 3.3v 2.7v 4.2v pwm/pfm switching control pwm control fosc=500khz, v out1, 2 = 2.5v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) efficiency1, 2 e ffi 1, 2 (%) 1.2v vin=0.9v 1.5v l=10 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p pwm/pfm switching control pwm control fosc=500khz, v out1, 2 = 3.3v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) efficiency1, 2 e ffi 1, 2 (%) l=10 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 1.2v vin=0.9 1.5v 2.7v pwm/pfm switching control pwm control fosc=500khz, v out1, 2 = 5.0v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) efficiency1, 2 e ffi 1, 2 (%) l=10 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 3.3v vin=0.9v 2.7v 1.5v 1.2v pwm/pfm switching control pwm control 4.2v typical performance characteristics (continued)
18/27 xc9501 series fosc=180khz, v out1, 2 = 8.0v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) ripple voltage1, 2 (mv) 5.0v vin=3.3v l=22 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1265p 4.2v pwm/pfm switching contr ol pwm contr ol (3) ripple voltage vs. output current fosc=180khz, v out1, 2 = 1.5v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) ripple voltage1, 2 (mv) 1.2v vin=0.9v l=22 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p pwm/pfm switching control pwm control fosc=180khz, v out1, 2 = 2.5v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) ripple voltage1, 2 (mv) vin=0.9v 1.2v 1.5v l=22 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p pwm/pfm switching contr ol pwm contr ol fosc=180khz, v out1, 2 = 3.3v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) ripple voltage1, 2 (mv) l=22 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 1.2 vin=0.9v 1.5v 2.7v pwm/pfm switching contr ol pwm contr ol fosc=180khz, v out1, 2 = 5.0v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) ripple voltage1, 2 (mv) 2.7v vin=1.5v l=22 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 4.2v 3.3v pwm/pfm switching contr ol pwm contr ol typical perform a nce characteristics (continued) dotted arrowhead pwm/pfm switching control
19/27 x c9501 series (3) ripple voltage vs. output current (continued) fosc=300khz, v out1, 2 = 2.5v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) ripple voltage1, 2 (mv) l=15 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 1.2 vin=0.9v 1.5v pwm/pfm switching control pwm control fosc=300khz, v out1, 2 = 3.3v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) ripple voltage1, 2 (mv) l=15 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 1.2v vin=0.9v 1.5v 2.7v pwm/pfm switching contr ol pwm contr ol fosc=300khz, v out1, 2 = 5.0v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) ripple voltage1, 2 (mv) l=15 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p vin=1.2v 3.3v 2.7v 4.2v pwm/pfm switching control pwm control 1.5v fosc=500khz, v out1, 2 = 2.5v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) ripple voltage1, 2 (mv) l=10 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 1.2v vin=0.9v 1.5v pwm/pfm switching control pwm control fosc=500khz, v out1, 2 = 3.3v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) ripple voltage1, 2 (mv) 2.7v vin=0.9v 1.2v 1.5v pwm/pfm switching control pwm control l=10 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p fosc=500khz, v out1, 2 = 5.0v 0 20 40 60 80 100 0.1 1 10 100 1000 output current 1, 2 i out1, 2 (ma) ripple voltage1, 2 (mv) l=10 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 4.2v vin=0.9v 2.7v 1.5v 3.3v 1.2v pwm/pfm switching control pwm control typical performance characteristics (continued)
20/27 xc9501 series xc9501b092 (180khz) 0 100 200 300 400 500 0246810 supply voltage vdd (v) supply current 1 idd1 ( a ) topr=85 25 - 40 xc9501b092 (180khz) 0 100 200 300 400 0246810 supply voltage vdd (v) supply current1-2 idd1-2 ( a ) topr=85 25 - 40 xc9501b092 (180khz) 0 100 200 300 400 0246810 supply voltage vdd (v) supply current 2 idd2 ( a ) topr=85 25 - 40 xc9501b092 (180khz) 150 160 170 180 190 200 210 0246810 supply voltage vdd (v) oscillation frequency fosc ( khz ) topr=25 85 - 40 typical performance characteristics (continued) (4) supply current vs. supply voltage (5) supply current 1-1 vs. supply voltage (6) supply current 1-2 vs. supply voltage (7) supply current 2 vs. supply voltage (8) stand-by current vs. supply voltage (9) oscillation frequency vs. supply voltage xc9501b092 (180khz) 0 100 200 300 400 0246810 supply voltage vdd (v) supply current 1-1 idd1-1 ( a) topr=85 o c 25 o c - 40 o c xc9501b092 (180khz) 0 2 4 6 8 10 0246810 supply voltage v dd (v ) stand-by current istb ( a) topr=85 25 - 40 xc9501b092 (180khz) 0 2 4 6 8 10 0246810 supply voltage v dd (v ) stand-by current istb ( a ) topr=85 25 - 40
21/27 x c9501 series xc9501b092 (180khz) 0 0.2 0.4 0.6 0.8 0246810 supply voltage vdd (v) pwm1, 2 'h' ' l' voltage vpwm1, 2 (v) topr=25 85 - 40 xc9501b092 (180khz) 0 0.2 0.4 0.6 0.8 0246810 supply voltage vdd (v) en1, 2 'h' ' l' voltage ven1, 2 (v) - 40 85 topr=25 xc9501b092 (180khz) 65 70 75 80 85 90 0246810 supply voltage vdd (v) max duty ratio 1, 2 maxdty1, 2 ( % ) topr=85 o c 25 o c - 40 o c xc9501b092 (180khz) 0 5 10 15 20 25 0246810 supply voltage vdd (v) softstart time1, 2 tss (msec ) xc9501b092 (180khz) 0 10 20 30 40 50 0246810 supply voltage vdd (v) ext1, 2 h on resistance () topr =85 25 - 40 xc9501b092 (180khz) 0 10 20 30 40 50 0246810 supply voltage vdd (v) ext1, 2 l on resistance () topr=85 25 - 40 (10) pwm1, 2 'h' 'l' voltage vs. supply voltage (11) en1, 2 'h' 'l' voltage vs. supply voltage (12) maximum duty ratio1, 2 vs. supply voltage (13) soft-start time1, 2 vs. supply voltage (14) ext1, 2 high on resistance vs. supply voltage (15) ext1, 2 low on resistance vs. supply voltage typical performance characteristics (continued)
22/27 xc9501 series xc9501b092 (180khz,vout=3.3v) 0 0.2 0.4 0.6 0.8 1 1.2 -40 -20 0 20 40 60 80 100 ambient temperature ta ( ) operation start-up voltage vst1 (v) iout=1ma l=22 h(cdrh5d28), cl=47 f(tantalum) sd:ma2q737, tr :2sd1628g xc9501b093(300khz) 3.0 3.1 3.2 3.3 3.4 3.5 -50 -20 10 40 70 100 ambient temperature ta ( ) output voltage vout ( v ) l=22 h(cdrh5d28), cl=94 f(tantalum) tr:xp161a1265p, sd:cms02 vin=1.8v iout=200ma xc9501b092(180khz,vout=2.0v) 0 0.2 0.4 0.6 0.8 1 -40-200 20406080100 ambient temperature ta ( ) oscillation start-up voltage vst2 (v) (16) operation start voltage vs. ambient temperature ( 17) operation retention voltage vs. ambient temperature (18) oscillation start voltage vs. ambient temperat ure (19) pfm duty ratio 1, 2 vs. supply voltage (20) output voltage vs. ambient temperature xc9501b092(180khz,vout=3.3v) 0 0.2 0.4 0.6 0.8 -40 -20 0 20 40 60 80 100 ambient temperature ta ( ) operation retention voltage vhld ( v ) l= 22 h(cdrh5d28), cl=47 f( tantalum) sd:ma2q737, tr :2sd1628g iout=1ma typical performance characteristics (continued) xc9501b092 (180khz) 20 25 30 35 40 0246810 supply voltage v dd (v ) pfm duty ratio 1, 2 (% ) topr=85 25 - 40 pfm duty ratio 1, 2(%)
23/27 x c9501 series < v out1, 2 = 3.3v, v in = 2.0v, i out1, 2 =100 a 100ma > pwm control pwm/pfm switching control (21) load transient response (continued) typical performance characteristics (continued)
24/27 xc9501 series pwm/pfm switching control < v out1, 2 = 3.3v, v in = 2.0v, i out1, 2 =10ma 100ma > pwm control (21) load transient response (continued) typical performance characteristics (continued)
25/27 x c9501 series < pwm controlled pwm / pfm switching controlled > soft-start wave form *ch1: en2=gnd when measurement ch2: en1=gnd when measurement typical performance characteristics (continued) (21) load transient response (continued)
26/27 xc9501 series marking rule msop-10, usp-10 represents product series 13mm mark product series 2 xc9501b09xxx represents type of dc/dc controller mark product series b xc9501b09 xxx mark voltage (v) product series 0 9 0.9 xc9501b09 xxx , represents fb voltage mark oscillation frequency (khz) product series 1 100 xc9501b091xx 2 180 xc9501b092xx 3 300 xc9501b093xx 5 500 xc9501b095xx represents oscillation frequency represents production lot number 0 to 9, a to z repeated (g, i, j, o, q, w excepted) note: no character inversion used packaging information msop-10 msop-10 ( top view ) 3 8 7 6 9 10 4 5 2 1 usp-10 ( top view ) usp-10 * soldering fillet surface is not formed because the sides of the pins are not plated.
27/27 x c9501 series o low at e, the lx pin may not ll. 1. the products and product specifications contained herein are subject to change without notice to improve performance characteristics. consult us, or our representatives before use, to confirm that the information in this catalog is up to date. 2. we assume no responsibility for any infringement of patents, patent rights, or other rights arising from the use of any information and circuitry in this catalog. 3. please ensure suitable shipping controls (including fail-safe designs and aging protection) are in force for equipment employing products listed in this catalog. 4. the products in this catalog are not developed, designed, or approved for use with such equipment whose failure of malfunction can be reasonably expected to directly endanger the life of, or cause significant injury to, the user. (e.g. atomic energy; aerospace; transport; combustion and associated safety equipment thereof.) 5. please use the products listed in this catalog within the specified ranges. should you wish to use the products under conditions exceeding the specifications, please consult us or our representatives. 6. we assume no responsibility for damage or loss due to abnormal use. 7. all rights reserved. no part of this catalog may be copied or reproduced without the prior permission of torex semiconductor ltd.

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