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mar. 17, 2003 ver. 5 ! applications " 2ch dc/dc controller (step-up + step-up) # pdas " input voltage range 0.9v ~ 10.0v # palm top computers " output voltage externally set-up # portable audio systems " switching frequency 180khz (15%) # various multi-function power supplies " max duty ratio 80% (typ.) " pwm, pwm/pfm switching control ! features " high efficiency 83% (typ.) input voltage range :0.9v ~ 10v " msop-10 package power supply voltage range :2.0v ~ 10v output voltage range :1.5v ~ 30v ! general descri p tion switching frequency :180khz 15% :300khz & 500khz available as custom output current :more than 200ma(vin=1.8v, vout=3.3v) stand-by current : 3.0 a (max) soft-start internally set-up msop-10 package ! t yp ical performance characteristics efficiency vs. output current ! t yp ical a pp lication ( xc9501b092a input: 2 cells, output 1 : 3.3v, output 2 : 5.0v ) xc9501 series 2ch. step-up dc/dc controller ics. 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. 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. can be set freely with 0.9v( 2.0%) of reference voltage supply & external components. 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. l1:22uh cdrh5d28 tr2:nch mosfet xp161a1355p c in :47 f v in =1.8v~3.2v tr1:nch mosfetxp161a1355p l2:22 h cdrh5d28 1 ext1 2 vdd 3 fb1 fb2 8 gnd 9 ext2 10 4 pwm1 pwm2 7 5 en1 en2 6 r fb21 :82k ? r fb22 :18k ? c fb2 :160pf 47 f + v out2 =5.0v iout2=~100ma sd2 :ma2q737 c l2 r fb11 :200k ? r fb12 :75k ? c fb1 :62pf 47 f ? + v out1 =3.3v iout1=~200ma sd1 :ma2q737 c l1 v pwm1 v pwm2 v en2 v en1 xc9501b092a (180khz,3.3v) 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 1000 output current 1 i out1 (ma) efficiency 1 effi1 (%) vin=1.8v 2.4v pwm control pwm/pfm switching control l1=22 h(cdrh5d28), c l1 =47 f(tantalum) sd1:ma2q737, tr1:xp161a1355p 1
! pin configuration ! pin assignment ! orderin g information xc9501 123456 fb voltage 0.9v 180khz 300khz (custom) 500khz (custom) embossed tape embossed tape 9 1 r 2 3 switching frequency msop-10 2 3 l package 5 5 6 4 standard feed reverse feed xc9501 series b 0 a v dd 3 fb1 4 pwm1 5 supply voltage channel 2 : pwm/pfm switching pin 2ch. step-up dc/dc controller ics. pin number pin name functions 1 ext 1 channel 1: external transistor drive pin 2 en1 fb2 9 gnd ground designator symbol 10 6 en2 7 pwm2 channel 2 : output voltage monitor feedback pin channel 2 : external transistor drive pin standard (10 pin) description ext 2 channel 1 : output voltage monitor feedback pin channel 2 : enable pin channel 1 : enable pin channel 1 : pwm/pfm switching pin 8 1 ext1 2 vdd 3 fb1 fb2 8 gnd 9 ext2 10 4 pwm1 pwm2 7 5 en1 en2 6 msop-10 (top view) 2
! block diagram ! absolute maximum ratings ta=25 o c mw i ext 100 ma tstg ext1, 2 pin current power dissipation operating ambient temperature storage temperature pd 150 - 0.3 ~ 12 v ext - 0.3 ~ v dd + 0.3 v fb1, 2 pin voltage v v en - 0.3 ~ 12 v en1, 2 pin voltage pwm1,2 pin voltage ext1, 2 pin voltage v dd pin voltage v fb xc9501 series v pwm - 0.3 ~ 12 v - 55 ~ + 125 o c o c topr - 40 ~ + 85 2ch. step-up dc/dc controller ics. v dd symbol units - 0.3 ~ 12 v ratings parameter pwm1 + - fb1 vdd ext1 vref1 = 0.9v with soft start1, en1 + - pwm/pfm controller 1 vref2 = 0.9v with soft start 1, en2 + - pwm/pfm controller 2 fb2 gnd ext2 osc generator ramp wave generator 1 ramp wave generator 2 error amp2 error amp1 pwm comparator2 pw m comparator1 en1 pwm2 en2 en1 to internal circuit en2 to internal circuit + - 3
! electrical characteristics xc9501b092a common characteristics (fosc=180khz) ta=25 o c v dd 2.0v, i out 1, 2 =1ma vout1, vout2 vout1 vout2 vout1 vout2 en2=3.0v, en1=0v, fb2=0v fb1=1.0v, fb2=0v unless otherwise stated, vdd=3.0v, pwm1,2=3.0v, en1, 2 =3.0v output 1 characteristics step-up controller ta=25 o c using tr: 2sd1628, unless otherwise stated, vdd=en1=pwm1=3.0v, en2=pwm2=gnd, ext2=open, fb2=open, vin=1.8v output 2 characteristics step-up controller ta=25 o c using tr: 2sd1628, unless otherwise stated, vdd=en2=pwm2=3.0v, pwm1=en1=gnd, ext1=open, fb1=open, vin=1.8v typ. typ. units min. v 5.0 - 0.65 ? 28 10.0 9 v 9 fb1 voltage parameter symbol v fb1 soft-start time1 ext1 "low" on resistance efficiency1 max. fb1,2 "high" current units parameter symbol conditions min. i fbh fb1,2=3.0v - -0.50 - 0.50 -- supply current 1 i dd1 fb1,2=0v - 80 70 - min. typ. - 0.9 pwm1,2 "low" current i pwml fb1,2=3.0v,pwm=0v no load fb2=0, ext2=v dd -0.4v e ffi 2 soft-start time2 t ss 2 v pwmh 2 efficiency2 7 9 pwm2 "low" voltage v pwml 2 no load - pwm2 "high" voltage ext2 "high" on resistance r extbh 2 22 - 0.20 - - - 47 20.0 30 83 m axdty 2 % - iout2=100ma, nch mosfet:xp161a1355p 80 - 25 38 ? 7 4 4 ms 9 % 9 oscillation start-up voltage2 v st 2-2 - pfm duty ratio2 p fmdty 2 no load, v pwm 2=0v maximum duty ratio2 fb2=0v same as i dd 1 75 v 2.0 % v v 0.8 85 0.9 - output voltage range (note 4) voutset 0.9 parameter symbol conditions 2ch. step-up dc/dc controller ics. test circuit max. units xc9501 series - - 0.9 - 2.0 - 10.0 - - 60 supply current 1-1 i dd1-1 150 a fb1=0v, fb2=1.0v - supply current 1-2 i dd1-2 120 a 132 a supply current 2 i dd2 fb1,2=1.0v - 3.0 a stand-by current i stb same as i dd1 , en1=en2=0v - 180 207 khz switching frequency fosc same as i dd1 153 --v en1,2 "high" voltage venh fb1,2=0v 0.65 - 0.20 v en1,2 "low" voltage venl fb1,2=0v - - 0.50 a en1,2 "high" current ienh fb1,2=3.0v - - -0.50 a en1,2 "low" current ienl 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 fb1,2 "low" current vfbl fb1,2=1v - 0.882 0.900 0.918 v operation start-up voltage1 (note 2) v st 1-1 - - i out =1.0ma, rfb11=200k ? ? v out 2 : i out 2=1ma 28 47 20.0 - 0.900 0.918 - max. - fb2 voltage v fb2 v dd =3.0v, v in =1.5v, i out2 =10ma 0.882 i out2 =1.0ma, rfb21=200k ? ? 0.95v, ce1=0v 0.65v 5.0 ext1 "high" on resistance r extbh 1 0.65 r extbl 1 - -2230 - 0.20 v pwm1 "low" voltage v pwml 1 no load - - operation start-up voltage2 (note 3) v st 1-2 v a 90 160 - 10.0 10.0 vin 0.9v, i out 1, 2=1ma ( note 3 ) 2.0 pwm1 "high" voltage v pwmh 1 supply voltage (note 1) v dd 2.0 v v v - a 3 4 4 4 4 4 4 4 4 a a % 1 2 4 4 v v 7 4 4 4 4 4 4 2 v ? 3 6 7 ms % % 6 6 22 - 8 1 test circuit v test circuit ? v 6 1 5 6 conditions v dd v out 1: i out 1=1ma v dd =3.0v, v in =1.5v, i out 1=10ma vin 0.9v, i out 1, 2=1ma ( note 2 ) en1=fb2=0v, ext1=0.4v fb1=0v fb1=0, ext1=v dd -0.4v no load en1=3.0v, en2=0v, fb1=0v v out 2 0.95v, en2=0v 0.65v ext2 "low" on resistance r extbl 2 en2=fb2=0v, ext2=0.4v - 4
! electrical characteristics xc9501b093a common characteristics (fosc=300khz) ta=25 o c v dd 2.0v, i out 1, 2 =1ma vout1, vout2 vout1 vout2 vout1 vout2 en2=3.0v, en1=0v, fb2=0v fb1=1.0v, fb2=0v unless otherwise stated, vdd=3.0v, pwm1,2=3.0v, en1, 2 =3.0v output 1 characteristics step-up controller ta=25 o c using tr: 2sd1628, unless otherwise stated, vdd=en1=pwm1=3.0v, en2=pwm2=gnd, ext2=open, fb2=open, vin=1.8v output 2 characteristics step-up controller ta=25 o c using tr: 2sd1628, unless otherwise stated, vdd=en2=pwm2=3.0v, pwm1=en1=gnd, ext1=open, fb1=open, vin=1.8v - 0.20 v 9 pwm2 "low" voltage v pwml 2 no load - --v 9 pwm2 "high" voltage v pwmh 2 no load 0.65 22 30 ? 7 ext2 "low" on resistance r extbl 2 en2=fb2=0v, ext2=0.4v - 28 47 ? 7 ext2 "high" on resistance r extbh 2 fb2=0, ext2=v dd -0.4v - 10.0 20.0 ms 9 soft-start time2 t ss 2v out 2 0.95v, en2=0v 0.65v 5.0 83 - % 9 efficiency2 e ffi 2 iout2=100ma, nch mosfet:xp161a1355p - 30 38 % 9 pfm duty ratio2 p fmdty 2 no load, v pwm 2=0v 22 4 maximum duty ratio2 m axdty 2 same as i dd 1 75 80 85 % 4 2.0 v 1 oscillation start-up voltage2 v st 2-2 fb2=0v - - 0.8 v 0.9 v 3 i out2 =1.0ma, rfb21=200k ? ? v out 2 : i out 2=1ma -- 0.900 0.918 v 8 fb2 voltage v fb2 v dd =3.0v, v in =1.5v, i out2 =10ma 0.882 typ. max. units circuit parameter symbol conditions min. - 0.20 v 6 pwm1 "low" voltage v pwml 1 no load - --v 6 pwm1 "high" voltage v pwmh 1 no load 0.65 22 30 ? 7 ext1 "low" on resistance r extbl 1 en1=fb2=0v, ext1=0.4v - 28 47 ? 7 ext1 "high" on resistance r extbh 1 fb1=0, ext1=v dd -0.4v - 10.0 20.0 ms 6 soft-start time1 t ss 1v out 1 0.95v, ce1=0v 0.65v 5.0 83 - % 6 efficiency1 e ffi 1 iout1=100ma, nch mosfet:xp161a1355p - 30 38 % 6 pfm duty ratio1 p fmdty 1 no load, vpwm1=0v 22 4 maximum duty ratio1 m axdty 1 same as i dd 1 75 80 85 % 4 2.0 v 1 oscillation start-up voltage1 v st 2-1 fb1=0v - - 0.8 v 0.9 v 2 i out =1.0ma, rfb11=200k ? ? v out 1: i out 1=1ma -- 0.900 0.918 v 5 fb1 voltage v fb1 v dd =3.0v, v in =1.5v, i out 1=10ma 0.882 typ. max. units circuit parameter symbol conditions min. - -0.50 a 4 fb1,2 "low" current vfbl fb1,2=1v - - 0.50 a 4 fb1,2 "high" current i fbh fb1,2=3.0v - - -0.50 a 4 pwm1,2 "low" current i pwml fb1,2=3.0v,pwm=0v - - 0.50 a 4 pwm1,2 "high" current i pwmh fb1,2=3.0v, pwm=3.0v - - -0.50 a 4 en1,2 "low" current ienl en1,2=0v, fb1,2=3.0v - - 0.50 a 4 en1,2 "high" current ienh fb1,2=3.0v - - 0.20 v 4 en1,2 "low" voltage venl fb1,2=0v - --v 4 en1,2 "high" voltage venh fb1,2=0v 0.65 300 345 khz 4 switching frequency fosc same as i dd1 255 - 3.0 a 4 stand-by current i stb same as i dd1 , en1=en2=0v - 80 160 a 4 supply current 2 i dd2 fb1,2=1.0v - 90 200 a 4 fb1=0v, fb2=1.0v - supply current 1-2 i dd1-2 80 150 a 4 en1=3.0v, en2=0v, fb1=0v - supply current 1-1 i dd1-1 110 250 a 4 supply current 1 i dd1 fb1,2=0v - 3 2.0 - 10.0 v -v vin 0.9v, i out 1, 2=1ma ( note 3 ) 0.9 - - v -v 1 vin 0.9v, i out 1, 2=1ma ( note 2 ) 2.0 - 10.0 v 2 0.9 output voltage range (note 4) voutset 0.9 - - - 10.0 v supply voltage (note 1) v dd 2.0 xc9501 series 2ch. step-up dc/dc controller ics. parameter symbol conditions min. typ. max. units circuit 5
! electrical characteristics xc9501b095a common characteristics (fosc=500khz) ta=25 o c v dd 2.0v, i out 1, 2 =1ma vout1, vout2 vout1 vout2 vout1 vout2 en2=3.0v, en1=0v, fb2=0v fb1=1.0v, fb2=0v unless otherwise stated, vdd=3.0v, pwm1,2=3.0v, en1, 2 =3.0v output 1 characteristics step-up controller ta=25 o c using tr: 2sd1628, unless otherwise stated, vdd=en1=pwm1=3.0v, en2=pwm2=gnd, ext2=open, fb2=open, vin=1.8v output 2 characteristics step-up controller ta=25 o c using tr: 2sd1628, unless otherwise stated, vdd=en2=pwm2=3.0v, pwm1=en1=gnd, ext1=open, fb1=open, vin=1.8v - 0.20 v 9 pwm2 "low" voltage v pwml 2 no load - --v 9 pwm2 "high" voltage v pwmh 2 no load 0.65 22 30 ? 7 ext2 "low" on resistance r extbl 2 en2=fb2=0v, ext2=0.4v - 28 47 ? 7 ext2 "high" on resistance r extbh 2 fb2=0, ext2=v dd -0.4v - 10.0 20.0 ms 9 soft-start time2 t ss 2v out 2 0.95v, en2=0v 0.65v 5.0 83 - % 9 efficiency2 e ffi 2 iout2=100ma, nch mosfet:xp161a1355p - 30 38 % 9 pfm duty ratio2 p fmdty 2 no load, v pwm 2=0v 22 4 maximum duty ratio2 m axdty 2 same as i dd 1 75 80 85 % 4 2.0 v 1 oscillation start-up voltage2 v st 2-2 fb2=0v - - 0.8 v 0.9 v 3 i out2 =1.0ma, rfb21=200k ? ? v out 2 : i out 2=1ma -- 0.900 0.918 v 8 fb2 voltage v fb2 v dd =3.0v, v in =1.5v, i out 2=10ma 0.882 typ. max. units circuit parameter symbol conditions min. - 0.20 v 6 pwm1 "low" voltage v pwml 1 no load - --v 6 pwm1 "high" voltage v pwmh 1 no load 0.65 22 30 ? 7 ext1 "low" on resistance r extbl 1 en1=fb2=0v, ext1=0.4v - 28 47 ? 7 ext1 "high" on resistance r extbh 1 fb1=0, ext1=v dd -0.4v - 10.0 20.0 ms 6 soft-start time1 t ss 1v out 1 0.95v, ce1=0v 0.65v 5.0 83 - % 6 efficiency1 e ffi 1 iout1=100ma, nch mosfet:xp161a1355p - 30 38 % 6 pfm duty ratio1 p fmdty 1 no load, vpwm1=0v 22 4 maximum duty ratio1 m axdty 1 same as i dd 1 75 80 85 % 4 2.0 v 1 oscillation start-up voltage1 v st 2-1 fb1=0v - - 0.8 v 0.9 v 2 i out =1.0ma, rfb11=200k ? ? v out 1: i out 1=1ma -- 0.900 0.918 v 5 fb1 voltage v fb1 v dd =3.0v, v in =1.5v, i out 1=10ma 0.882 typ. max. units circuit parameter symbol conditions min. - -0.50 a 4 fb1,2 "low" current vfbl fb1,2=1v - - 0.50 a 4 fb1,2 "high" current i fbh fb1,2=3.0v - - -0.50 a 4 pwm1,2 "low" current i pwml fb1,2=3.0v,pwm=0v - - 0.50 a 4 pwm1,2 "high" current i pwmh fb1,2=3.0v, pwm=3.0v - - -0.50 a 4 en1,2 "low" current ienl en1,2=0v, fb1,2=3.0v - - 0.50 a 4 en1,2 "high" current ienh fb1,2=3.0v - - 0.20 v 4 en1,2 "low" voltage venl fb1,2=0v - --v 4 en1,2 "high" voltage venh fb1,2=0v 0.65 500 575 khz 4 switching frequency fosc same as i dd1 425 - 3.0 a 4 stand-by current i stb same as i dd1 , en1=en2=0v - 100 200 a 4 supply current 2 i dd2 fb1,2=1.0v - 130 270 a 4 fb1=0v, fb2=1.0v - supply current 1-2 i dd1-2 110 220 a 4 en1=3.0v, en2=0v, fb1=0v - supply current 1-1 i dd1-1 165 350 a 4 supply current 1 i dd1 fb1,2=0v - 3 2.0 - 10.0 v -v vin 0.9v, i out 1, 2=1ma ( note 3 ) 0.9 - - v -v 1 vin 0.9v, i out 1, 2=1ma ( note 2 ) 2.0 - 10.0 v 2 0.9 output voltage range (note 4) voutset 0.9 - - - 10.0 v supply voltage (note 1) v dd 2.0 xc9501 series 2ch. step-up dc/dc controller ics. parameter symbol conditions min. typ. max. units circuit 6
notes 1) 2) 3) 4) 5) ! t yp ical a pp lication circui t 1 vdd connected to vout1 2 vdd connected to vin effi={ [ (output voltage) x (output current) ] / [ (input voltage) x (input current) ] } x 100 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 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. please be careful not to exceed the breakdown voltage level of the peripheral parts. 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 out 2. with operations from v in =0.9v, the 1st channel's (output 1) e n1 pin should be set to disable. once ouput voltage v out 2 is more than 2.0v, the en1 pin should be set to enable. 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 out 1. with operations from v in =0.9v, the 2nd channel's (output 2) e n2 pin should be set to disable. once ouput voltage v out 1 is more than 2.0v, the en2 pin should be set to enable. xc9501 series 2ch. step-up dc/dc controller ics. tr2 cin tr1 l2 rfb12 cfb1 l1 vin 1 ext1 2 vdd 3 fb1 fb2 8 gnd 9 ext2 10 4 pwm1 pwm2 7 5 en1 en2 6 rfb21 rfb22 cfb2 + vout2 sd2 cl2 rfb11 sd1 vpwm2 ven2 ven1 vpwm1 cl1 + vout1 l1 vin 1 ext1 2 vdd 3 fb1 fb2 8 gnd 9 ext2 10 4 pwm1 pwm2 7 5 en1 en2 6 rfb21 rfb22 cfb2 + vout2 sd2 cl2 rfb11 sd1 vpwm2 ven2 ven1 vpwm1 cl1 + vout1 tr2 cin tr1 l2 rfb12 cfb1 l1 vin 1 ext1 2 vdd 3 fb1 fb2 8 gnd 9 ext2 10 4 pwm1 pwm2 7 5 en1 en2 6 rfb21 rfb22 cfb2 + vout2 sd2 cl2 rfb11 sd1 vpwm ven2 ven1 vpwm1 cl1 + vout1 l1 vin 1 ext1 2 vdd 3 fb1 fb2 8 gnd 9 ext2 10 4 pwm1 pwm2 7 5 en1 en2 6 rfb21 rfb22 cfb2 + vout2 sd2 cl2 rfb11 sd1 vpwm2 ven2 ven1 vpwm1 cl1 + vout1 cdd 7
! o p eration descri p tion the ramp wave generator generates a saw-tooth waveform based on outputs from the phase shift generator. 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 page 8). 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 (cl) 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 necessar y . 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 mod e will be disable, the channel's operations will stop and the ext1 pin will be kept at a low level (the external n-type mosfet wi ll 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 vdd<2.0v or less. although ic starts oscillation from a vin of 0.9v, the ic's power supply pin (vdd) and the output voltage monitor pin (fb1) should be connected to vout1. 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 vout1 is more than 2.0v. conversely, when ic 2's power supply pin (vdd) and output voltage monitor pin (fb2) are connected to vout2, set channel one's (output 1) en1 pin to disable and turn it to enable when vout2 is more than 2.0v. for power supply voltages of vdd<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 compar ed and output voltage will be controlled when the power supply voltage is vdd>2.0v or more. with power supply voltages of vdd>2.0v, the start-up sequence for en1 and en2 will not be required. the xc9501 series are multi-functional, 2 channel step-up dc/dc converter 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 pwm comparator compares outputs from the error amp. and saw-tooth waveform. when the voltage from the error amp's output is low, the external switch will be set to on. xc9501 series 2ch. step-up dc/dc controller ics. 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). 8
v out =0.9 (rfb11+rfb12) /rfb12 [example of calculation] when rfb11=200k ? and rfb12=75k ? , v out1 =0.9 (200k+75k) / 75k=3.3v. [typical example] the same method can be adopted for channel two (output 2) also. [external components] tr : * mosfet * npn mosfet xp161a1355pr (torex n-channel power mosfet) 2sd1628 (sanyo) rb : 500 ? ( adjust in accordance with load & tr.'s hfe.) cb : 2200pf (ceramic) set up according to the equation below. sd : ma2q737 (schottky , matsushita) cms02 (schottky , toshiba) l : 22 h (sumida, cdrh5d28, fosc = 180khz) 15 h (sumida, cdrh5d28, fosc = 300khz) 10 h (sumida, cdrh5d28, fosc = 500khz) cl : 16v, 47 f (tantalum, nichichemi mce series) 100 2.5 390 220 33 8.0 120 15 2.2 390 270 33 5.0 82 18 160 62 2.0 330 270 39 3.3 200 75 xc9501 series 2ch. step-up dc/dc controller ics. 220 220 62 3.0 560 240 24 the value of cfb1(cfb2), speed-up capacitor for phase compensation, should be resulted fzfb = 1 / (2 x cfb1 x rfb11) equal to 12kmz. adjustments are required from 1khz to 50khz depending on the application, value of inductance (l), and value of load capacity (cl). cb 1/(2 rb fosc 0.7) 160 13 82 1.8 note : vgs breakdown voltage of this tr. is 8v so please be careful with the power supply voltage. if the power supply voltage is more than 6v, please use xp161a1265pr, where vgs breakdown voltage is 12v. vst1 of xp161a1355pr is 1.2v (max.) and that of xp161a1265pr is 1.5v (max.) increase capacity according to the equation below when the step-up voltage ratio is large and output current is high. cl = (cl standard value) (i out (ma) / 300ma v out /v in 12.0 2.7 360 180 33 1.5 220 330 62 vout (v) rfb11 (k ? ) rfb12 (k ? ) cfb1 (pf) output voltage can be set by adding external split resistors. output voltage is determined by the following equation, based on the values of rfb11(rfb21) and rfb12(rfb22). the sum of rfb11(rfb21) and rfb12(rfb22) should normally be 1 m ? or less. vout (v) rfb11 (k ? ) rfb12 (k ? ) cfb1 (pf) vout (v) rfb11 (k ? ) rfb12 (k ? ) cfb1 (pf) 9
! test circuit xc9501 series 2ch. step-up dc/dc controller ics. 510 ? 2200pf l1 npn tr1 r fb11 r fb12 c l1 + v out1 510 ? 2200pf l2 npn tr2 r fb21 r fb22 r l2 c l2 + v out2 r l1 v in 1 f 1 ext1 2 vdd 3 fb1 fb2 8 gnd 9 ext2 10 4 pwm1 pwm2 7 5 en1 en2 6 + 1 ext1 2 vdd 3 fb1 fb2 8 gnd 9 ext2 10 4 pwm1 pwm2 7 5 en1 en2 6 510 ? 2200pf l1 npn tr1 r fb11 r fb12 c fb1 c l1 + v out1 510 ? 2200pf l2 npn tr2 r fb21 r fb22 c fb2 r l2 c l2 + v out2 r l1 c in v in + 510 ? 2200pf l1 npn tr1 r fb11 r fb12 + v out1 510 ? 2200pf l2 npn tr1 r fb21 r fb22 r l2 + v out2 r l1 v in 1 ext1 2 vdd 3 fb1 fb2 8 gnd 9 ext2 10 4 pwm1 pwm2 7 5 en1 en2 6 + circuit 1 circuit 2 circuit 3 sd1 sd2 sd1 sd2 sd1 sd2 c l1 c l2 circuit 4 circuit 5 circuit 6 l1 nch mosfet1 200k ? 75k ? 62pf r l v in c l1 + v out1 c in a a osc 1 ext1 2 vdd 3 fb1 fb2 8 gnd 9 ext2 10 4 pwm1 pw m2 7 5 en1 en2 6 + circuit 7 circuit 8 circuit 9 nch mosfet2 l2 200k ? 75k ? 62pf r l v v in c l2 + v out2 a a c in 1 ext1 2 vdd 3 fb1 fb2 8 gnd 9 ext2 10 4 pwm1 pwm2 7 5 en1 en2 6 + nch mosfet2 l2 r l v v in + v out2 a a c in v dd 1 f 1 ext1 2 vdd 3 fb1 fb2 8 gnd 9 ext2 10 4 pw m1 pwm2 7 5 en1 en2 6 c l2 + osc v pwm1 v en1 a 1 f v dd osc a a v pwm2 a a v en2 1 ext1 2 vdd 3 fb1 fb2 8 gnd 9 ext2 10 4 pw m1 pwm2 7 5 en1 en2 6 v fb1 a v fb2 a l1 r l v v in + v out1 c in c l1 nch mosfet1 v dd 1 f 1 ext1 2 vdd 3 fb1 fb2 8 gnd 9 ext2 10 4 pwm1 pwm2 7 5 en1 en2 6 + osc v pwm1 v en1 1 f v dd osc v pwm2 v en2 1 ext1 2 vdd 3 fb1 fb2 8 gnd 9 ext2 10 4 pwm1 pwm2 7 5 en1 en2 6 v fb1 v fb2 v ext1 v ext2 v v pwm1 v en1 osc v pwm2 v en2 rp rp sd1 sd1 sd2 sd2 c in c in c fb1 c fb2 c fb1 c fb2 10
! peri p heral com p onents used for test circuits circuit 1, circuit 2, circuit 3 l1, l2 : 22 h (sumida cdrh5d28) : xc9501b092a 15 h (sumida cdrh5d28) : xc9501b093a 10 h (sumida cdrh5d28) : xc9501b095a sd1, sd2 : crs02 (schottky diode, toshiba) ec10qs06 (schottky diode, nihon inter) cl1, cl2 : 16mce476md2 (tantalum, nihon chemicon) 35mce335mb2 (tantalum, nihon chemicon) cin : 16mce476md2 (tantalum, nihon chemicon) npn tr1, 2: 2sa1628 (sanyo) cph3215 (sanyo) cph3210 (sanyo) rfb : please use by the conditions as below. rfb11 + rfb12 1m ? rfb21 + rfb22 1m ? rfb11 / rfb12 = (setting output voltage / 0.9) -1 rfb21 / rfb22 = (setting output voltage / 0.9) -1 cfb : please adjust as below: fzfb=1/(2 x x cfb1 x rfb11) = 1khz ~50khz ( 12khz usual) fzfb=1/(2 x x cfb2 x rfb21) = 1khz ~50khz ( 12khz usual) circuit 6 and circuit 9 l1, l2 : 22 h (sumida cdrh5d28) : xc9501b092a 15 h (sumida cdrh5d28) : xc9501b093a 10 h (sumida cdrh5d28) : xc9501b095a sd1, sd2: ma2q737 (schottky diode, matsushita) cl1, cl2 : 16mce476md2 (tantalum, nihon chemicon) cin : 16mce476md2 (tantalum, nihon chemicon) n-ch mosfet1 : xp161a1355p (torex) circuit 5 and circuit 8 l1, l2 : 22 h (sumida cdrh5d28) sd1, sd2 : ma2q737 (schottky, matsushita) cl1, cl2 : 16mce476md2 (tantalum, nihon chemicon) cin : 16mce476md2 (tantalum, nihon chemicon) n-ch mosfet1 : xp161a1355p (torex) xc9501 series 2ch. step-up dc/dc controller ics. 11
! notes on use 1. pwm/pfm automatic switching 3. ratings use the xc9501 series and peripheral components within the limits of their ratings. xc9501 series 2ch. step-up dc/dc controller ics. 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, w ith 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 iout = 100 ma. 12
? typical performance characteristics (1) output voltage vs. output current dotted arrowhead pwm/pfm switchin g control 13 xc9501 series 2ch. step-up dc/dc controller ics. 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 control pwm control 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 control pwm control 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 control 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 v out1, 2 (v) 2.7v vin=1.5v 4.2v 3.3v l=22 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p pwm/pfm switching control pwm control
( 1 ) out p ut volta g e vs. out p ut current ( continued ) dotted arrowhead pwm/pfm switchin g control 14 xc9501 series 2ch. step-up dc/dc controller ics. 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 control 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 control pwm control 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 control 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 control l=10 h(cdrh5d28), cl=94 f(tantalum) sd:cms02, tr:xp161a1355p 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 control pwm control 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 control pwm control
( 2 ) efficienc y vs. out p ut current dotted arrowhead pwm/pfm switchin g control 15 xc9501 series 2ch. step-up dc/dc controller ics. 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 = 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 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
( 2 ) efficienc y vs. out p ut current ( continued ) dotted arrowhead pwm/pfm switchin g control 16 xc9501 series 2ch. step-up dc/dc controller ics. 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=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 = 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=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=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=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
( 3 ) ri pp le volta g e vs. out p ut curren t dotted arrowhead pwm/pfm switchin g control 17 xc9501 series 2ch. step-up dc/dc controller ics. 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 control pwm control 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 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) 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 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) ripple voltage1, 2 (mv) l=22 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
( 3 ) ri pp le volta g e vs. out p ut current ( continued ) dotted arrowhead pwm/pfm switchin g control 18 xc9501 series 2ch. step-up dc/dc controller ics. 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 1.2v 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) 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 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=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 = 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) (4) supply current vs. supply voltage (5) supply current 1-1 vs. supply voltage ( 6 ) su pp l y current 1-2 vs. su pp l y volta ge ( 7 ) su pp l y current 2 vs. su pp l y volta ge ( 8 ) stand-b y current vs. su pp l y volta ge ( 9 ) oscillation fre q uenc y vs. su pp l y volta ge 19 xc9501 series 2ch. step-up dc/dc controller ics. xc9501b092 (180khz) 0 100 200 300 400 500 0246810 supply voltage vdd (v) supply current 1 idd1 ( a) topr=85 o c 25 o c - 40 o c 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) 0 100 200 300 400 0246810 supply voltage vdd (v) supply current 2 idd2 ( a) topr=85 o c 25 o c - 40 o c xc9501b092 (180khz) 0 100 200 300 400 0246810 supply voltage vdd (v) supply current1-2 idd1-2 ( a) topr=85 o c 25 o c - 40 o c xc9501b092 (180khz) 150 160 170 180 190 200 210 0246810 supply voltage vdd (v) oscillation frequency fosc (khz) topr=25 o c 85 o c - 40 o c xc9501b092 (180khz) 0 2 4 6 8 10 0246810 supply voltage vdd (v) stand-by current istb ( a) topr=85 o c 25 o c - 40 o c
( 10 ) pwm1, 2 'h' 'l' volta g e vs. su pp l y volta g e ( 11 ) en1, 2 'h' 'l' volta g e vs. su pp l y volta ge ( 12 ) maximum dut y ratio1, 2 vs. su pp l y volta ge ( 13 ) softstart time1, 3 vs. su pp l y volta ge ( 14 ) ext1, 2 hi g h on resistance vs. su pp l y volta ge ( 15 ) ext1, 2 low on resistance vs. su pp l y volta ge 20 xc9501 series 2ch. step-up dc/dc controller ics. 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 o c 85 o c - 40 o c 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 o c 85 o c topr=25 o c xc9501b092 (180khz) 0 5 10 15 20 25 0246810 supply voltage vdd (v) softstart time1, 2 tss (msec) 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 10 20 30 40 50 0246810 supply voltage vdd (v) ext1, 2 h on resistance ( ? ) topr=85 o c 25 o c - 40 o c xc9501b092 (180khz) 0 10 20 30 40 50 0246810 supply voltage vdd (v) ext1, 2 l on resistance ( ? ) topr=85 o c 25 o c - 40 o c
( 16 ) o p eration start-u p volta g e vs. ambient tem p eratur e ( 17 ) o p eration retention volta g e vs. ambient tem p eratur e ( 18 ) oscillation start-u p volta g e vs. ambient tem p eratur e ( 19 ) pfm dut y ratio 1, 2 vs. su pp l y volta ge ( 20 ) out p ut volta g e vs. ambient tem p eratur e 21 xc9501 series 2ch. step-up dc/dc controller ics. xc9501b093(300khz) 3.0 3.1 3.2 3.3 3.4 3.5 -50 -20 10 40 70 100 ambient temperature ta ( 0 c) output voltage vout (v) l=22 h(cdrh5d28), cl=94 f(tantalum) tr:xp161a1265p, sd:cms02 vin=1.8v iout=200ma 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 ( o c) operation start-up voltage vst1 (v) iout=1ma l=22 h(cdrh5d28), cl=47 f(tantalum) sd:ma2q737, tr:2sd1628g 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 ( o c) operation retention voltage vhld (v) l=22 h(cdrh5d28), cl=47 f(tantalum) sd:ma2q737, tr:2sd1628g iout=1ma xc9501b092(180khz,vout=2.0v) 0 0.2 0.4 0.6 0.8 1 -40 -20 0 20 40 60 80 100 ambient temperature ta ( o c) oscillation start-up voltage vst2 (v) xc9501b092 (180khz) 20 25 30 35 40 0246810 supply voltage vdd (v) pfm duty ratio 1, 2 (%) topr=85 o c 25 o c - 40 o c
load transient response < vout1 = 3.3v, vin = 2.0v iout1, 2 =100 a ! 100ma > pwm control pwm/pfm switching control 22 xc9501 series 2ch. step-up dc/dc controller ics. 100 a 100ma 3.3v ch1 ch2 200 sec/div ch1:v out1 , 2 , ac-coupled, 50mv/div ch2:i out1, 2 , 50ma/div fosc=180khz, v out1, 2 =3.3v vin=2.0v, i out1, 2 =100 a 100ma 100 a 100ma 3.3v ch1 ch2 10msec/div fosc=180khz, v out1, 2 =3.3v vin=2.0v, i out1, 2 =100ma 100 a 100 a 100ma 3.3v ch1 ch2 10msec/div 100 a 100ma 3.3v ch1 ch2 200sec/div fosc=180khz, v out1, 2 =3.3v vin=2.0v, i out1, 2 =100 a 100ma fosc=180khz, v out1, 2 =3.3v vin=2.0v, i out1, 2 =100ma 100 a ch1:v out1, 2 , ac-coupled, 50mv/div ch2:i out1, 2 , 50ma/div ch1:v out1, 2 , ac-coupled, 50mv/div ch2:i out1, 2 , 50ma/div ch1:v out1, 2 , ac-coupled, 50mv/div ch2:i out1, 2 , 50ma/div
< vout1 = 3.3v, vin = 2.0v iout1, 2 =10ma ! 100ma > pwm control pwm/pfm switching control 23 xc9501 series 2ch. step-up dc/dc controller ics. 10ma 100ma 3.3v ch1 ch2 200 sec/div ch1:v out1 , 2 , ac-coupled, 50mv/div ch2:i out1, 2 , 50ma/div fosc=180khz, v out1, 2 =3.3v vin=2.0v, i out1, 2 =10ma 100ma 10ma 100ma 3.3v ch1 ch2 200 sec/div fosc=180khz, v out1, 2 =3.3v vin=2.0v, i out1, 2 =100ma 10ma 10ma 100ma 3.3v ch1 ch2 200 sec/div 10ma 100ma 3.3v ch1 ch2 200 sec/div fosc=180khz, v out1, 2 =3.3v vin=2.0v, i out1, 2 =10ma 100ma fosc=180khz, v out1, 2 =3.3v vin=2.0v, i out1, 2 =100ma 10ma ch1:v out1, 2 , ac-coupled, 50mv/div ch2:i out1, 2 , 50ma/div ch1:v out1, 2 , ac-coupled, 50mv/div ch2:i out1, 2 , 50ma/div ch1:v out1, 2 , ac-coupled, 50mv/div ch2:i out1, 2 , 50ma/div
< pwm controlled ! pwm / pfm switching controlled > soft start wave form * ch1: en2=gnd when measuremen t ch2: en1=gnd when measuremen t 24 xc9501 series 2ch. step-up dc/dc controller ics. 0.65v 3.3v ch1 ch2 1msec/div ch1:v out1, 2 , ac-coupled ,10mv/div ch2:pwm 1, 2 , 0.5v/div 0v fosc=180kh, v out1, 2 =3.3v vin=2.0v, i out1, 2 =1ma pwm1, 2, ?l? ?h? 0.65v 3.3v ch1 ch2 1msec/div 0v fosc=180khz, v out1, 2 =3.3v vin=2.0v, i out1, 2 =1ma pwm1, 2, ?h? ?l? ch1:vout 1, 2 , ac-coupled ,10mv/div ch2:pwm 1, 2 , 0.5v/div fosc=180khz, v out1, 2 =3.3v vin=2.0v, i out1, 2 =100ma en1, 2 ?l? ?h? cin=47 f ch1 ch2 ch3 3.3v 0.65v 300ma 4ms/div ch1:v out1, 2 , 1.0v/div ch2:i in1, 2 , 100ma/div ch3:en1, 2 , 0.5v/div

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