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1/24 XCL210 series 50ma/200ma inductor built-in step-down ?micro dc/dc? converters etr28009-001a general description the XCL210 series is a synchronous step-down micro dc/dc conv erter which integrates an inductor and a control ic in one tiny package (2.0mm 2.5mm, h=1.0mm). an internal coil simplifies the circuit and enables minimization of noise and other operational trouble due to the circuit wiring. a wide operating vo ltage range of 2.0v to 6.0v enables support for applications that require an internally fixed output voltage fr om 1.0v to 4.0v in increments of 0.05v. during stand-by, all circuits are shutdown to reduce currentconsumption to as low as 0.1 a or less. with the built-in uvlo (under voltage lock out) function, the internal p-channel mo s driver transistor is forced off when input voltage becomes uvlo ditect voltage or lower. the XCL210 integrate c l discharge function which enables the el ectric charge at the output capacitor c l to be discharged via the internal discharge switch located between the l x and v ss pins. when the devices enter stand-by mode, output voltage quickly returns to the v ss level as a result of this function. features input voltage : 2.0v 6.0v output voltage : 1.0v 4.0v (2.0%, 0.05v step increments) control methods : pfm control output current : 200ma(XCL210a/XCL210c) 50ma(XCL210b/XCL210d) supply current : 0.5 a high efficiency : 93% (v in =3.6v,v out =3.0v/100 a ) function : uvlo short circuit protection c l discharge capacitor : low esr ceramic capacitor operating ambient temperature : -40 +85 packages : cl-2025-02 environmentally friendly : eu rohs compliant, pb free typical performance characteristics typical a pplication circuit greenoperationcompatible 50ma c in 10 f c l 22 f 7 8 1 2 3 4 5 6 gnd v in lx ce v out nc v in a pplications wearable devices smart meters bluetooth units energy harvest devices back up power supply circuits portable game consoles devices with 1 lithium cell XCL210b301gr-g(v out =3.0v)
2/24 XCL210 series block diagram XCL210 series, type a/typeb * XCL210a and b type do not have c l discharge function. * diodes inside the circuits are esd protection diodes and parasitic diodes. XCL210 series, type c/typed lx inductor gnd l2 l1 v in v out ce pfm comparator r2 r1 synch buffer drive pfm controller vref short protection cfb current sense uvlo vin start up controller ce controller logic v dd v dd lx inductor gnd l2 l1 v in v out ce pfm comparator r2 r1 synch buffer drive pfm controller vref short protection cfb current sense cl discharge uvlo vin start up controller ce controller logic v dd v dd
3/24 XCL210 series product classification ordering information XCL210 ?????- pin configuration pin assignment pin number pin name functions 1 l x switching 2 gnd ground 3 v out output voltage 4 ce chip enable 5 nc ground 6 v in power input 7 l1 inductor electrodes 8 l2 inductor electrodes ce pin function pin name signal status ce h operation (all types) l standby (all types) * please do not leave the ce pin open. designator item symbol description product type a i out =200ma , without c l auto discharge b i out =50ma without c l auto discharge c i out =200ma , with c l auto discharge d i out =50ma, with c l auto discharge ? output voltage 10 40 output voltage options e.g.) 1.2v = 1 = 2 1.25v = 1 = c 0.05v increments : 0.05=a, 0.15=b, 0.25=c, 0.35=d, 0.45=e, 0.55=f, 0.65=h, 0.75=k, 0.85=l, 0.95=m fixed number 1 fixed number ?- (*1) package (order unit) gr-g cl-2025-02 (3,000pcs/reel) (bottom view) l1 l2 7 8 v in 6 nc 5 ce 4 1 lx 2 gn d 3 v out (*1) the ?-g? suffix denotes halogen and antimony free as well as being fully eu rohs compliant. * the dissipation pad for the cl-2025-02 package should be solder-plated in recommended mount pattern and metal masking so as to enhance mounting strength and heat release. the mount pattern should be connected to gnd pin (no.2).
4/24 XCL210 series absolute maximum ratings ta = 2 5 ? c parameter symbol ratings units v in pin voltage v in -0.3 ~ +7.0 v l x pin voltage v lx -0.3 ~ v in +0.3 or +7.0 (*1) v v out pin voltage v out -0.3 ~ v in +0.3 or +7.0 (*1) v ce pin voltage v ce -0.3 ~ +7.0 v l x pin current i lx 1000 ma power dissipation pd 1000 (*2) mw operating ambient temperature topr -40 ~ +85 ? c storage temperature tstg -55 ~ +125 ? c * all voltages are described based on the gnd. (*1) the maximum value is the lower of either v in + 0.3 or +7.0. (*2) the power dissipation figure shown is pcb mounted (40mm 40mm, t=1.6mm, glass epoxy fr-4). please refer to page 15 for details.
5/24 XCL210 series electrical characteristics XCL210axx1gr-g, without c l discharge function parameter symbol conditions min. typ. max. units circuit input voltage v in - 2.0 - 6.0 v output voltage v out(e) (*2) resistor connected with l x pin. voltage which l x pin changes ?l? to ?h? level while v out is decreasing. e1 v uvlo release voltage v uvlo(e) v ce =v in , v out =0v. resistor connected with l x pin. voltage which l x pin changes ?l? to ?h? level while v in is increasing. 1.65 1.80 1.95 v uvlo hysteresis voltage v hys(e) v ce =v in , v out =0v. resistor connected with l x pin. v uvlo(e) - voltage which l x pin changes ?h? to ?l? level while v in is decreasing. 0.11 0.15 0.24 v supply current iq v in =v ce =v out(t) +0.5v (*1) , v in =2.0v, if v out(t) Q 1.5v (*1) , v out =v out(t) +0.5v (*1) , l x =open. e2 a standby current i stb v in =5.0v, v ce =v out =0v, l x =open. - 0.1 1.0 a l x sw ?h? leak current i leakh v in =5.0v, v ce =v out =0v, v lx =0v. - 0.1 1.0 a l x sw ?l? leak current i leakl v in =5.0v, v ce =v out =0v, v lx =5.0v. - 0.1 1.0 a pfm switching current i pfm v in =v ce =v out(t) +2.0v (*1) , i out =10ma. 260 330 400 ma maximum duty ratio (*3) maxdty v in =v out =v out( ) 0.95v (*1) , v ce =1.2v resistor connected with l x pin. 100 - - % efficiency (*4) effi v in =v ce =5.0v, v out(t) =4.0v (*1) , i out =30ma. - 93 - % efficiency (*4) effi v in =v ce =3.6v, v out(t) =3.3v (*1) , i out =30ma. - 93 - % efficiency (*4) effi v in =v ce =3.6v, v out(t) =1.8v (*1) , i out =30ma. - 87 - % l x sw ?pch? on resistance (*5) r lxp v in =v ce =5.0v, v out =0v, i lx =100ma. - 0.4 0.65 ? l x sw ?nch? on resistance r lxn v in =v ce =5.0v. - 0.4 (*6) - ? - output voltage temperature characteristics ? v out / (v out ? ? topr) -40 Q topr Q 85 . - 100 - ppm/ ce ?high? voltage v ceh v out =0v. resistor connected with l x pin. voltage which l x pin changes ?l? to ?h? level while v ce =0.2 1.5v. 1.2 - 6.0 v ce ?low? voltage v cel v out =0v. resistor connected with l x pin. voltage which l x pin changes ?h? to ?l? level while v ce =1.5 0.2v. gnd - 0.3 v ce ?high? current i ceh v in =v ce =5.0v, v out =0v, l x =open. -0.1 - 0.1 a ce ?low? current i cel v in =5.0v, v ce =v out =0v, l x =open. -0.1 - 0.1 a short protection threshold voltage v short resistor connected with l x pin. voltage which l x pin changes ?h? to ?l? level while v out = v out(t) +0.1v 0v (*1) . 0.4 0.5 0.6 v inductance value l test frequency=1mhz - 8.0 - h (coil) rated current i dc_l ? t=+40 - 600 - ma unless otherwise stated, v in =v ce =5.0v (*1) v out(t) =nominal output voltage (*2) v out(e) =effective output voltage the actual output voltage value v out(e) is the pfm comparator threshold voltage in the ic. therefore, the dc/dc circuit output voltage, including the per ipheral components, is boosted by the ripple voltage average valu e. please refer to the char acteristic example. (*3) not applicable to the products with v out(t) < 2.15v since it is out of operational volatge range. (*4) effi=[{ (output voltage)(output current)] / [(input voltage)(input current)}]100 (*5) l x sw ?pch? on resistance = (v in ? v lx pin measurement voltage) / 100ma (*6) designed value ta = 2 5 ? c
6/24 XCL210 series electrical characteristics (continued) XCL210bxx1gr-g , without c l discharge function parameter symbol conditions min. typ. max. units circuit input voltage v in - 2.0 - 6.0 v output voltage v out(e) (*2) resistor connected with l x pin.voltage which l x pin changes ?l? to ?h? level while v out is decreasing. e1 v uvlo release voltage v uvlo(e) v ce =v in , v out =0v. resistor connected with l x pin. voltage which l x pin changes ?l? to ?h? level while v in is increasing. 1.65 1.80 1.95 v uvlo hysteresis voltage v hys(e) v ce =v in , v out =0v. resistor connected with l x pin. v uvlo(e) - voltage which l x pin changes ?h? to ?l? level while v in is decreasing. 0.11 0.15 0.24 v supply current iq v in =v ce =v out(t) +0.5v (*1) ,v in =2.0v, if v out(t) Q 1.5v (*1) , v out =v out(t) +0.5v (*1) , l x =open. e2 a standby current i stb v in =5.0v, v ce =v out =0v, l x =open. - 0.1 1.0 a l x sw ?h? leak current i leakh v in =5.0v, v ce =v out =0v, v lx =0v. - 0.1 1.0 a l x sw ?l? leak current i leakl v in =5.0v, v ce =v out =0v, v lx =5.0v. - 0.1 1.0 a pfm switching current i pfm v in =v ce =v out(t) +2.0v (*1) , i out =10ma. 115 180 250 ma maximum duty ratio (*3) maxdty v in =v out =v out( ) 0.95v (*1) , v ce =1.2v resistor connected with l x pin. 100 - - % efficiency (*4) effi v in =v ce =5.0v,v out(t) =4.0v (*1) , i out =30ma. - 95 - % efficiency (*4) effi v in =v ce =3.6v, v out(t) =3.3v (*1) , i out =30ma. - 95 - % efficiency (*4) effi v in =v ce =3.6v, v out(t) =1.8v (*1) , i out =30ma. - 89 - % l x sw ?pch? on resistance (*5) r lxp v in =v ce =5.0v, v out =0v, i lx =100ma. - 0.4 0.65 ? l x sw ?nch? on resistance r lxn v in =v ce =5.0v. - 0.4 (*6) - ? - output voltage temperature characteristics ? v out / (v out ? ? topr) -40 Q topr Q 85 . - 100 - ppm/ ce ?high? voltage v ceh v out =0v. resistor connected with l x pin. voltage which l x pin changes ?l? to ?h? level while v ce =0.2 1.5v. 1.2 - 6.0 v ce ?low? voltage v cel v out =0v. resistor connected with l x pin. voltage which l x pin changes ?h? to ?l? level while v ce =1.5 0.2v. gnd - 0.3 v ce ?high? current i ceh v in =v ce =5.0v, v out =0v, l x =open. -0.1 - 0.1 a ce ?low? current i cel v in =5.0v, v ce =v out =0v, l x =open. -0.1 - 0.1 a short protection threshold voltage v short resistor connected with l x pin. voltage which l x pin changes ?h? to ?l? level while v out =v out(t) +0.1v 0v (*1) . 0.4 0.5 0.6 v inductance value l test frequency=1mhz - 8.0 - h (coil) rated current i dc_l ? t=+40 - 600 - ma unless otherwise stated, v in =v ce =5.0v (*1) v out(t) =nominal output voltage (*2) v out(e) =effective output voltage the actual output voltage value v out(e) is the pfm comparator threshold voltage in the ic. therefore, the dc/dc circuit output voltage, including the per ipheral components, is boosted by the ripple voltage average valu e. please refer to the char acteristic example. (*3) not applicable to the products with v out(t) < 2.15v since it is out of operational volatge range. (*4) effi=[{ (output voltage)(output current)] / [(input voltage)(input current)}]100 (*5) l x sw ?pch? on resistance = (v in ? v lx pin measurement voltage) / 100ma (*6) designed value ta = 2 5 ? c ta = 2 5 ? c
7/24 XCL210 series electrical characteristics (continued) XCL210cxx1gr-g, with c l discharge function parameter symbol conditions min. typ. max. units circuit input voltage v in - 2.0 - 6.0 v output voltage v out(e) (*2) resistor connected with l x pin. voltage which l x pin changes ?l? to ?h? level while v out is decreasing. e1 v uvlo release voltage v uvlo(e) v ce =v in , v out =0v. resistor connected with l x pin. voltage which l x pin changes ?l? to ?h? level while v in is increasing. 1.65 1.80 1.95 v uvlo hysteresis voltage v hys(e) v ce =v in , v out =0v. resistor connected with l x pin. v uvlo(e) - voltage which l x pin changes ?h? to ?l? level while v in is decreasing. 0.11 0.15 0.24 v supply current iq v in =v ce =v out(t) +0.5v (*1) ,v in =2.0v, if v out(t) Q 1.5v (*1) , v out =v out(t) +0.5v (*1) , l x =open. e2 a standby current i stb v in =5.0v, v ce =v out =0v, l x =open. - 0.1 1.0 a l x sw ?h? leak current i leakh v in =5.0v, v ce =v out =0v, v lx =0v. - 0.1 1.0 a l x sw ?l? leak current i leakl v in =5.0v, v ce =v out =0v, v lx =5.0v. - 0.1 1.0 a pfm switching current i pfm v in =v ce =v out(t) +2.0v (*1) , i out =10ma. 260 330 400 ma maximum duty ratio (*3) maxdty v in =v out =v out( ) 0.95v (*1) , v ce =1.2v resistor connected with l x pin. 100 - - % efficiency (*4) effi v in =v ce =5.0v, v out(t) =4.0v (*1) , i out =30ma. - 93 - % efficiency (*4) effi v in =v ce =3.6v, v out(t) =3.3v (*1) , i out =30ma. - 93 - % efficiency (*4) effi v in =v ce =3.6v, v out(t) =1.8v (*1) , i out =30ma. - 87 - % l x sw ?pch? on resistance (*5) r lxp v in =v ce =5.0v, v out =0v, i lx =100ma. - 0.4 0.65 ? l x sw ?nch? on resistance r lxn v in =v ce =5.0v. - 0.4 (*6) - ? - output voltage temperature characteristics ? v out / (v out ? ? topr) -40 Q topr Q 85 . - 100 - ppm/ ce ?high? voltage v ceh v out =0v. resistor connected with l x pin. voltage which l x pin changes ?l? to ?h? level while v ce =0.2 1.5v. 1.2 - 6.0 v ce ?low? voltage v cel v out =0v. resistor connected with l x pin. voltage which l x pin changes ?h? to ?l? level while v ce =1.5 0.2v. gnd - 0.3 v ce ?high? current i ceh v in =v ce =5.0v, v out =0v, l x =open. -0.1 - 0.1 a ce ?low? current i cel v in =5.0v, v ce =v out =0v, l x =open. -0.1 - 0.1 a short protection threshold voltage v short resistor connected with l x pin. voltage which l x pin changes ?h? to ?l? level while v out = v out(t) +0.1v 0v (*1) . 0.4 0.5 0.6 v c l discharge r dchg v in =v out =5.0v, v ce =0v, l x =open. 55 80 105 ? inductance value l test frequency=1mhz - 8.0 - h (coil) rated current i dc_l ? t=+40 - 600 - ma unless otherwise stated, v in =v ce =5.0v (*1) v out(t) =nominal output voltage (*2) v out(e) =effective output voltage the actual output voltage value v out(e) is the pfm comparator threshold voltage in the ic. therefore, the dc/dc circuit output voltage, including the per ipheral components, is boosted by the ripple voltage average valu e. please refer to the char acteristic example. (*3) not applicable to the products with v out(t) < 2.15v since it is out of operational volatge range. (*4) effi=[{ (output voltage)(output current)] / [(input voltage)(input current)}]100 (*5) l x sw ?pch? on resistance = (v in ? v lx pin measurement voltage) / 100ma (*6) designed value ta = 2 5 ? c
8/24 XCL210 series electrical characteristics (continued) XCL210dxx1gr-g, with c l discharge function parameter symbol conditions min. typ. max. units circuit input voltage v in - 2.0 - 6.0 v output voltage v out(e) (*2) resistor connected with l x pin. voltage which l x pin changes ?l? to ?h? level while v out is decreasing. e1 v uvlo release voltage v uvlo(e) v ce =v in , v out =0v. resistor connected with l x pin. voltage which l x pin changes ?l? to ?h? level while v in is increasing. 1.65 1.80 1.95 v uvlo hysteresis voltage v hys(e) v ce =v in , v out =0v. resistor connected with l x pin. v uvlo(e) - voltage which l x pin changes ?h? to ?l? level while v in is decreasing. 0.11 0.15 0.24 v supply current iq v in =v ce =v out(t) +0.5v (*1) , v in =2.0v, if v out(t) Q 1.5v (*1) , v out =v out(t) +0.5v (*1) , l x =open. e2 a standby current i stb v in =5.0v, v ce =v out =0v, l x =open. - 0.1 1.0 a l x sw ?h? leak current i leakh v in =5.0v, v ce =v out =0v, v lx =0v. - 0.1 1.0 a l x sw ?l? leak current i leakl v in =5.0v, v ce =v out =0v, v lx =5.0v. - 0.1 1.0 a pfm switching current i pfm v in =v ce =v out(t) +2.0v (*1) , i out =10ma. 115 180 250 ma maximum duty ratio (*3) maxdty v in =v out =v out( ) 0.95v (*1) , v ce =1.2v resistor connected with l x pin. 100 - - % efficiency (*4) effi v in =v ce =5.0v,v out(t) =4.0v (*1) , i out =30ma. - 95 - % efficiency (*4) effi v in =v ce =3.6v, v out(t) =3.3v (*1) , i out =30ma. - 95 - % efficiency (*4) effi v in =v ce =3.6v, v out(t) =1.8v (*1) , i out =30ma. - 89 - % l x sw ?pch? on resistance (*5) r lxp v in =v ce =5.0v, v out =0v, i lx =100ma. - 0.4 0.65 ? l x sw ?nch? on resistance r lxn v in =v ce =5.0v. - 0.4 (*6) - ? - output voltage temperature characteristics ? v out / (v out ? ? topr) -40 Q topr Q 85 . - 100 - ppm/ ce ?high? voltage v ceh v out =0v. resistor connected with l x pin. voltage which l x pin changes ?l? to ?h? level while v ce =0.2 1.5v. 1.2 - 6.0 v ce ?low? voltage v cel v out =0v. resistor connected with l x pin. voltage which l x pin changes ?h? to ?l? level while v ce =1.5 0.2v. gnd - 0.3 v ce ?high? current i ceh v in =v ce =5.0v, v out =0v, l x =open. -0.1 - 0.1 a ce ?low? current i cel v in =5.0v, v ce =v out =0v, l x =open. -0.1 - 0.1 a short protection threshold voltage v short resistor connected with l x pin. voltage which l x pin changes ?h? to ?l? level while v out = v out(t) +0.1v 0v (*1) . 0.4 0.5 0.6 v c l discharge r dchg v in =v out =5.0v, v ce =0v, l x =open. 55 80 105 ? inductance value l test frequency=1mhz - 8.0 - h rated current i dc ? t=+40 - 600 - ma unless otherwise stated, v in =v ce =5.0v (*1) v out(t) =nominal output voltage (*2) v out(e) =effective output voltage the actual output voltage value v out(e) is the pfm comparator threshold voltage in the ic. therefore, the dc/dc circuit output voltage, including the per ipheral components, is boosted by the ripple voltage average valu e. please refer to the char acteristic example. (*3) not applicable to the products with v out(t) < 2.15v since it is out of operational volatge range. (*4) effi=[{ (output voltage)(output current)] / [(input voltage)(input current)}]100 (*5) l x sw ?pch? on resistance = (v in ? v lx pin measurement voltage) / 100ma (*6) designed value ta = 2 5 ? c
9/24 XCL210 series electrical characteristics (continued) XCL210 series voltage chart symbol e1 e2 symbol e1 e2 parameter output voltage supply current parameter output voltage supply current units: v units: v units : a units: v units: v units : a output voltage min. max. typ. max. output voltage min. max. typ. max. 1.00 0.980 1.020 0.500 0.800 3.00 2.940 3.060 0.800 2.100 1.05 1.029 1.071 3.05 2.989 3.111 1.10 1.078 1.122 3.10 3.038 3.162 1.15 1.127 1.173 3.15 3.087 3.213 1.20 1.176 1.224 3.20 3.136 3.264 1.25 1.225 1.275 3.25 3.185 3.315 1.30 1.274 1.326 3.30 3.234 3.366 1.35 1.323 1.377 3.35 3.283 3.417 1.40 1.372 1.428 3.40 3.332 3.468 1.45 1.421 1.479 3.45 3.381 3.519 1.50 1.470 1.530 0.500 0.900 3.50 3.430 3.570 1.500 3.000 1.55 1.519 1.581 3.55 3.479 3.621 1.60 1.568 1.632 3.60 3.528 3.672 1.65 1.617 1.683 3.65 3.577 3.723 1.70 1.666 1.734 3.70 3.626 3.774 1.75 1.715 1.785 3.75 3.675 3.825 1.80 1.764 1.836 3.80 3.724 3.876 1.85 1.813 1.887 3.85 3.773 3.927 1.90 1.862 1.938 3.90 3.822 3.978 1.95 1.911 1.989 3.95 3.871 4.029 2.00 1.960 2.040 0.600 1.100 4.00 3.920 4.080 2.05 2.009 2.091 2.10 2.058 2.142 2.15 2.107 2.193 2.20 2.156 2.244 2.25 2.205 2.295 2.30 2.254 2.346 2.35 2.303 2.397 2.40 2.352 2.448 2.45 2.401 2.499 2.50 2.450 2.550 0.700 1.500 2.55 2.499 2.601 2.60 2.548 2.652 2.65 2.597 2.703 2.70 2.646 2.754 2.75 2.695 2.805 2.80 2.744 2.856 2.85 2.793 2.907 2.90 2.842 2.958 2.95 2.891 3.009
10/24 XCL210 series test circuits < circuit no. >< circuit no. > < circuit no. >< circuit no. > < circuit no. > l1 l2 v in lx v out ce c in wave form measure point r pu lld own l1 l2 gnd v in lx v out ce c in v i lx l1 l2 gnd v in lx v out ce c in a i ceh i cel l1 l2 gnd v in lx v out ce c in c l a v l wave form measure point external components l 10 h(selected goods) c in 10 f(ceramic) c l :22 f(ceramic) r l gnd v external components c in 10 f(ceramic) r pulldown :100 l1 l2 gnd v in lx v out ce c in a a a external components c in 10 f(ceramic) external components c in 10 f(ceramic) r pulldown wave form measure point external components c in 10 f(ceramic) r pulldown :100 < circuit no. > l1 l2 gnd v in lx v out ce c in external components c in 10 f(ceramic) c l 22 f(ceramic) a v a r l c l
11/24 XCL210 series typical application circuit manufacturer part number value c in taiyo yuden lmk107bbj106malt 10 f/10v lmk212abj106mg 10 f/10v tdk c1608x5r1a106m 10 f/10v c2012x5r1a106m 10 f/10v cl taiyo yuden lmk107bbj226ma 22 f/10v lmk212bbj226mg 22 f/10v tdk c1608x5r1a226m 22 f/10v c2012x5r1a226m 22 f/10v * take capacitance loss, withstand voltage, and other condi tions into consideration when selecting components. c in cl 7 8 1 2 3 4 5 6 gnd v in lx ce v out nc v in v out note: the integrated inductor can be used only for this dc/dc converter. please do not use this inductor for other reasons.
12/24 XCL210 series operational explanation the XCL210 series consists of a reference voltage supply, pfm comparator, pch driver tr, nch synchronous rectification switch t r, current sensing circuit, pfm control circuit, ce control circuit, and others. (refer to the block diagram below.) an ultra-low quiescent current circuit and synchronous rectification enabl e a significant reduction of dissipation in the ic, a nd the ic operates with high efficiency at both light loads and heavy loads. current limit pfm is used for the control method, and even when switching current superposition occurs, increases of output voltage ripple are suppressed, allowi ng use over a wide voltage and current range. the ic is compat ible with low- capacitance ceramic capacitors, and a small, high-per formance step-down dc-dc converter can be created. the actual output voltage v out(e) in the electrical characteristics is the threshold voltage of the pfm comparator in the block diagram. therefore the average output voltage of the step-down circuit, including peripheral components, depends on the ripple voltage. before use , test fully using the actual device. reference voltage for stabilization of the output voltage of the ic. (1) the feedback voltage (fb voltage) is the voltage that results from dividing the output voltage with the ic internal dividin g resistors r fb1 and r fb2 . the pfm comparator compares this fb voltage to v ref . when the fb voltage is lower than v ref , the pfm comparator sends a signal to the buffer driver through the pfm control circuit to turn on the pch driver tr. when the fb voltage is higher than v ref , the pfm comparator sends a signal to prevent the pch driver tr from turning on. (2) when the pch driver tr is on, the current sense circuit monitors the current that flows through the pch driver tr connected to the lx pin. when the current reaches the set pfm switching current (i pfm ), the current sense circuit sends a signal to the buffer driver through the pfm control circuit. this signal turns off the pch driver tr and turns on the nch synchronous rectification switch tr. (3) the on time (off time) of the nch synchronous rectification switch tr is dynamically optimized inside the ic. after the off time elapses and the pfm comparator detects that the v out voltage is higher than the set voltage, the pfm compar ator sends a signal to the pfm control circuit that prevents the pch driver tr from turning on. however, if the v out voltage is lower than the set voltage, the pfm comparator starts pch driver tr on. v lx v out i lx v lx v out i lx v in =v ce =3.6v v out =1.8v i out =5ma l=8.0 h c l =22uf ta = 2 5 v in =v ce =3.6v v out =1.8v i out =30ma l=8.0 h c l =22uf ta=2 5 v out(e) voltage v lx : 2[v/div] v out : 50[mv/div] i lx : 100[ma/div] 10[ s/div] 10[ s/div] i pfm lx inductor gnd l2 l1 v in v out ce pfm comparator r2 r1 synch buffer drive pfm controller vref short protection cfb current sense uvlo vin start up controller ce controller logic v dd v dd lx inductor gnd l2 l1 v in v out ce pfm comparator r2 r1 synch buffer drive pfm controller vref short protection cfb current sense cl discharge uvlo vin start up controller ce controller logic v dd v dd
13/24 XCL210 series operational explanation (continued) by continuously adjusting the interval of the linked operation of (1), (2) and (3) abov e in response to the load current, the o utput voltage is stabilized with high efficiency from light loads to heavy loads. the pfm switching current monitors the current that flows through the pch driver tr, and is a value that limits the pch driver tr current. the pch driver tr remains on until the coil current reaches the pfm switching current (i pfm ). an approximate value for this on-time t on can be calculated using the following equation: t on = l i pfm / (v in ? v out ) to avoid excessive ripple voltage in the event that the coil curr ent does not reach the pfm switching current within a certain interval even though the pch driver tr has turned on and the fb voltage is above v ref , the pch driver tr can be turned off at any timing using the maximum on-time function of the pfm control circuit. if the pch driver tr turns off by the maximum on-time function instead of the current sens e circuit, the nch synchronous rectification switch tr will not turn on and the coil current will flow to the v out pin by means of the parasite diode of the nch synchronous rectification switch tr. when the v in voltage is lower than the output voltage, through mode autom atically activates and the pch driver tr stays on continuously. (1) in through mode, when the load current is increased and the current that flows through the pch driver tr reaches a load cur rent that is several tens of ma lower than the set pfm switching current (i pfm ), the current sense circuit sends a signal through the pfm control circuit to the buffer driver. this signal turns off the pch driver tr and turns on the nch synchronous rectification switch tr. (2) after the on-time (off-time) of the nch synchronous rectific ation switch tr, the pch driver tr turns on until the current r eaches the set pfm switching current (i pfm ) again. if the load current is large as described abov e, operations (1) and (2) above are repeated. if the load current is several tens of ma lower than the pfm switching current (i pfm ), the pch driver tr stays on continuously. when the v in voltage rises, v in start mode stops the short-circui t protection function during the interv al until the fb voltage approaches v ref . after the v in voltage rises and the fb voltage approaches v ref by step-down operation, v in start mode is released. in order to prevent an excessive rush current while v in start mode is activated, the coil current flows to the v out pin by means of the parasitic diode of the nch synchronous rectification tr. in v in start mode as well, the coil current is limited by the pfm switching current. the short-circuit protection function monitors the v out voltage. in the event that the v out pin is accidentally shorted to gnd or an excessive load current causes the v out voltage to drop below the set short-circuit protection voltage, the short-circuit protection func tion activates, and turns off and latches the pch driver tr at any selected timing. once in th e latched state, the ic is turned off and then restarted from t he ce pin, or operation is started by re-applying the v in voltage. when the v in pin voltage drops below the uvlo detection voltage, the ic stops switching operation at any selected timing, turns off the pch driver tr and nch synchronous rectification switch tr (uvlo mode). when the v in pin voltage recovers and rises above the uvlo release voltage, the ic restarts operation. on the XCL210 series, a c l discharge function is available as an option (XCL210c/XCL210d types). this function enables quick discharging of the c l load capacitance when l voltage is input into the ce pin by the nch tr connected between the v out -gnd pins, or in uvlo mode. this prevents malfunctioning of the application in the event that a charge remains on c l when the ic is stopped. the discharge time is determined by c l and the c l discharge resistance r dchg , including the nch tr (refer to the diagr am below). using this time constant = c l r dchg , the discharge time of the output voltage is calculated by means of the equation below. v = v out e - t / , or in terms of t, t = in(v out / v) v: output voltage after discharge v out : set output voltage : discharge time c l : value of load capacitance (c l ) r dchg : value of c l discharge resistance varies by power supply voltage. : c l r dchg the c l discharge function is not avail able on the XCL210a/XCL210b types.
14/24 XCL210 series note on use 1. be careful not to exceed the absolute maximum r atings for externally connected components and this ic. 2. the dc/dc converter characteristics greatly depend not only on the characteristics of this ic but also on those of externall y connected components, so refer to the specifications of each component and be ca reful when selecting the components. be especially carefu l of the characteristics of the capacitor used for the load capacity c l and use a capacitor with b characteristi cs (jis standard) or an x7r/x5r (eia standard) ceramic capacitor. 3. use a ground wire of sufficient strength. ground potential fluc tuation caused by the ground current during switching could c ause the ic operation to become unstable, so reinforce the area around the gnd pin of the ic in particular. 4. mount the externally connected components in the vicinity of the ic. also use short, thick wires to reduce the wire impedanc e. 5. when the voltage difference between v in and v out is small, switching energy increases and there is a possibility that the ripple voltage will be too large. before use, test fully using the actual device. 6. the ce pin does not have an internal pull-up or pu ll-down, etc. apply the prescribed voltage to the ce pin. 7. if other than the recommended inductance and c apacitance values are used, excessive ri pple voltage or a drop in efficiency m ay result. 8. if other than the recommended inductance and capacitance values are used, a drop in output voltage when the load is excessiv e may cause the short-circuit protection functi on to activate. before use, test ful ly using the actual device. 9. at high temperature, excessive ripple voltage may occur and c ause a drop in output voltage and efficiency. before using at h igh temperature, test fully using the actual device 10. at light loads or when ic operation is stopped, leakage current from the pch driver tr may cause the output voltage to rise . 11. the average output voltage may vary due to the effects of outp ut voltage ripple caused by th e load current. before use, tes t fully using the actual device. 12. if the c l capacitance or load current is large, the output voltage rise time will lengthen when the ic is started, and coil current over lay may occur during the interval until the output voltage reaches the set voltage (refer to the diagram below). 13. when the ic is started, the short- circuit protection function does not operate during the interval until the v out voltage reaches a value near the set voltage. 14. if the ic is started at a v in voltage that activates through mode, it is possible that the short-circuit pr otection function will not operate. before use, test fully using the actual device. 15. if the load current is excessively large wh en the ic is started, it is possible that the v out voltage will not rise to the set voltage. before use, test fully using the actual device. XCL210a series v in =v ce =0 6.0v v out =1.0v i out =200 a cl=22uf ta = 2 5
15/24 XCL210 series note on use (continued) 16. in actual operation, the maximum on-time depends on the peripher al components, input voltage, and load current. before use, test fully using the actual device. 17. when the v in voltage is turned on and off continuously, excessive rush current may occur while the voltage is on. before use, test fully us ing the actual device. 18. when the v in voltage is high, the pch driver may change from on to off before the coil current reaches the pfm switching current (i pfm ), or before the maximum on-time elapses. before use, test fully using the actual device. 19. when the ic change to the through mode at light load, the supply current of this ic can increase in some cases. 20. for temporary, transitional voltage drop or voltage rising phenomenon, the ic is liable to malfunction should the ratings b e exceeded. 21. torex places an importance on improv ing our products and their reliability. we request that users incorporate fail-s afe designs and post-aging protec tion treatment when using torex products in their syst ems. 22. the uvlo function can be activated when the uvlo hysteresis width gets to about 0mv and after several tens ms elapses at li ght loads. before use, test fully us ing the actual device. 23. please use within the power dissipation range below. please also note that the powe r dissipation may changed by test condi tions, the power dissipation figure shown is pcb mounted. the power loss of micro dc/dc according to the following formula: power loss = v out i out ((100/effi) ? 1) (w) v out : output voltage (v) i out : output current (a) effi : conversion efficiency (%) measurement condit ion (reference data) condition: mount on a board ambient: natural convection soldering: lead (pb) free board: dimensions 40 x 40 mm (1600 mm 2 in one side) copper (cu) traces occupy 50% of the board area in top and back faces package heat-sink is tied to the copper traces material: glass epoxy (fr-4) thickness: 1.6mm through-hole: 4 x 0.8 diameter evaluation board (unit: mm) pd vs operating temperature pakage body temperature vs operating temperature
16/24 XCL210 series note on use (continued) instructions of pattern layouts 1. to suppress fluctuations in the v in potential, connect a bypass capacitor (c in ) in the shortest path between the v in pin and ground pin. 2. please mount each external component as close to the ic as possible. 3. wire external components as close to the ic as possible and use thick, short c onnecting traces to r educe the circuit impedan ce. 4. make sure that the ground traces are as thick as possible, as variations in ground potential caused by high ground currents at the time of switching may result in instability of the ic. 5. internal driver transistors bring on heat because of the transistor current and on resistance of the driver transistors. recommended pattern layout top view back side top view
17/24 XCL210 series typical performance characteristics 1) output voltage vs. output current 3.0 3.1 3.2 3.3 3.4 3.5 3.6 0.01 0.1 1 10 100 output voltage: v out [v] output current: i out [ma] vin=4.2v,cl=22uf vin=4.2v,cl=22uf2 vin=5.0v,cl=22uf vin=5.0v,cl=22uf2 1.5 1.6 1.7 1.8 1.9 2.0 2.1 0.01 0.1 1 10 100 output voltage: v out [v] output current: i out [ma] vin=3.0v,cl=22uf vin=3.0v,cl=22uf2 vin=4.2v,cl=22uf vin=4.2v,cl=22uf2 0.9 1.0 1.1 1.2 1.3 1.4 1.5 0.01 0.1 1 10 100 output voltage: v out [v] output current: i out [ma] vin=3.0v,cl=22uf vin=3.0v,cl=22uf2 vin=4.2v,cl=22uf vin=4.2v,cl=22uf2 3.0 3.1 3.2 3.3 3.4 3.5 3.6 0.01 0.1 1 10 100 output voltage: v out [v] output current: i out [ma] vin=4.2v,cl=22uf vin=4.2v,cl=22uf2 vin=5.0v,cl=22uf vin=5.0v,cl=22uf2 1.5 1.6 1.7 1.8 1.9 2.0 2.1 0.01 0.1 1 10 100 output voltage: v out [v] output current: i out [ma] vin=3.0v,cl=22uf vin=3.0v,cl=22uf2 vin=4.2v,cl=22uf vin=4.2v,cl=22uf2 0.9 1.0 1.1 1.2 1.3 1.4 1.5 0.01 0.1 1 10 100 output voltage: v out [v] output current: i out [ma] vin=3.0v,cl=22uf vin=3.0v,cl=22uf2 vin=4.2v,cl=22uf vin=4.2v,cl=22uf2 XCL210b121gr-g/XCL210d121gr-g XCL210b181gr-g/XCL210d181gr-g XCL210a121gr-g/XCL210c121gr-g XCL210a181gr-g/XCL210c181gr-g XCL210a331gr-g/XCL210c331gr-g XCL210b331gr-g/XCL210d331gr-g
18/24 XCL210 series typical performance characteristics (continued) 2) efficiency vs. output current 0 20 40 60 80 100 0.01 0.1 1 10 100 efficiency: effi [%] output current: i out [ma] vin=3.0v,cl=22uf vin=3.0v,cl=22uf2 vin=4.2v,cl=22uf vin=4.2v,cl=22uf2 0 20 40 60 80 100 0.01 0.1 1 10 100 efficiency: effi [%] output current: i out [ma] vin=4.2v,cl=22uf vin=4.2v,cl=22uf2 vin=5.0v,cl=22uf vin=5.0v,cl=22uf2 0 20 40 60 80 100 0.01 0.1 1 10 100 efficiency: effi [%] output current: i out [ma] vin=3.0v,cl=22uf vin=3.0v,cl=22uf2 vin=4.2v,cl=22uf vin=4.2v,cl=22uf2 0 20 40 60 80 100 0.01 0.1 1 10 100 efficiency: effi [%] output current: i out [ma] vin=4.2v,cl=22uf vin=4.2v,cl=22uf2 vin=5.0v,cl=22uf vin=5.0v,cl=22uf2 0 20 40 60 80 100 0.01 0.1 1 10 100 efficiency: effi [%] output current: i out [ma] vin=3.0v,cl=22uf vin=3.0v,cl=22uf2 vin=4.2v,cl=22uf vin=4.2v,cl=22uf2 0 20 40 60 80 100 0.01 0.1 1 10 100 efficiency: effi [%] output current: i out [ma] vin=3.0v,cl=22uf vin=3.0v,cl=22uf2 vin=4.2v,cl=22uf vin=4.2v,cl=22uf2 XCL210b121gr-g/XCL210d121gr-g XCL210b181gr-g/XCL210d181gr-g XCL210a121gr-g/XCL210c121gr-g XCL210a181gr-g/XCL210c181gr-g XCL210a331gr-g/XCL210c331gr-g XCL210b331gr-g/XCL210d331gr-g
19/24 XCL210 series typical performance characteristics (continued) 3) ripple voltage vs. output current 0 50 100 150 200 0.01 0.1 1 10 100 ripple voltage: vr [mv] output current: i out [ma] vin=4.2v,cl=22uf vin=4.2v,cl=22uf2 vin=5.0v,cl=22uf vin=5.0v,cl=22uf2 0 50 100 150 200 0.01 0.1 1 10 100 ripple voltage: vr [mv] output current: i out [ma] vin=4.2v,cl=22uf vin=4.2v,cl=22uf2 vin=5.0v,cl=22uf vin=5.0v,cl=22uf2 0 50 100 150 200 0.01 0.1 1 10 100 ripple voltage: vr [mv] output current: i out [ma] vin=3.0v,cl=22uf vin=3.0v,cl=22uf2 vin=4.2v,cl=22uf vin=4.2v,cl=22uf2 0 50 100 150 200 0.01 0.1 1 10 100 ripple voltage: vr [mv] output current: i out [ma] vin=3.0v,cl=22uf vin=3.0v,cl=22uf2 vin=4.2v,cl=22uf vin=4.2v,cl=22uf2 0 50 100 150 200 0.01 0.1 1 10 100 ripple voltage: vr [mv] output current: i out [ma] vin=3.0v,cl=22uf vin=3.0v,cl=22uf2 vin=4.2v,cl=22uf vin=4.2v,cl=22uf2 0 50 100 150 200 0.01 0.1 1 10 100 ripple voltage: vr [mv] output current: i out [ma] vin=3.0v,cl=22uf vin=3.0v,cl=22uf2 vin=4.2v,cl=22uf vin=4.2v,cl=22uf2 XCL210b121gr-g/XCL210d121gr-g XCL210b181gr-g/XCL210d181gr-g XCL210a121gr-g/XCL210c121gr-g XCL210a181gr-g/XCL210c181gr-g XCL210a331gr-g/XCL210c331gr-g XCL210b331gr-g/XCL210d331gr-g
20/24 XCL210 series typical performance characteristics (continued) 4) ambient temperature vs. output voltage 1.0 1.1 1.2 1.3 1.4 -40-20 0 20406080100 output voltage: v out [v] ambient temperature : ta [ ] iout=0.1ma iout=1ma iout=10ma iout=100ma v in =3.6v 1.0 1.1 1.2 1.3 1.4 -40 -20 0 20 40 60 80 100 output voltage: v out [v] ambient temperature : ta [ ] iout=0.1ma iout=1ma iout=10ma v in =3.6v 1.6 1.7 1.8 1.9 2.0 -40-20 0 20406080100 output voltage: v out [v] ambient temperature : ta [ ] iout=0.1ma iout=1ma iout=10ma v in =3.6 1.6 1.7 1.8 1.9 2.0 -40-20 0 20406080100 output voltage: v out [v] ambient temperature : ta [ ] iout=0.1ma iout=1ma iout=10ma iout=100ma v in =3.6v 3.1 3.2 3.3 3.4 3.5 -40 -20 0 20 40 60 80 100 output voltage: v out [v] ambient temperature : ta [ ] iout=0.1ma iout=1ma iout=10ma iout=100ma v in =5.0v 3.1 3.2 3.3 3.4 3.5 -40 -20 0 20 40 60 80 100 output voltage: v out [v] ambient temperature : ta [ ] iout=0.1ma iout=1ma iout=10ma v in =5.0v XCL210b121gr-g/XCL210d121gr-g XCL210a121gr-g/XCL210c121gr-g XCL210a181gr-g/XCL210c181gr-g XCL210a331gr-g/XCL210c331gr-g XCL210b181gr-g/XCL210d181gr-g XCL210b331gr-g/XCL210d331gr-g
21/24 XCL210 series typical performance characteristics (continued) 5) load transient response (1)XCL210b181gr-g, v in =3.6v, v out =1.8v / i out =0.1ma ? 30ma (2)XCL210b181gr-g, v in =3.6v, v out =1.8v / i out =10ma ? 30ma i out = 0.1ma ? 30ma v out = 1.8v i out = 10ma ? 30ma v out = 1.8v
22/24 XCL210 series packaging information cl-2025-02 (unit: mm) reference pattern layout (unit: mm) reference metal mask design (unit: mm) * implementation of cl-2025-02 is recommended within accuracy 0.05mm. external lead
23/24 XCL210 series marking rule cl-2025-02 represents products series represents integer of the output voltage represents the decimal part of output voltage , represents production lot number 01 09 0a 0z 11 9z a1 a9 aa az b1 zz in order. (g, i, j, o, q, w excluded) note: no character inversion used. mark product series 0 XCL210******-g mark type output voltage(v) product series 8 a 1.x XCL210a1****-g 9 2.x XCL210a2****-g e 3.x XCL210a3****-g f 4.x XCL210a4****-g h b 1.x XCL210b1****-g k 2.x XCL210b2****-g l 3.x XCL210b3****-g m 4.x XCL210b4****-g n c 1.x XCL210c1****-g p 2.x XCL210c2****-g r 3.x XCL210c3****-g s 4.x XCL210c4****-g t d 1.x XCL210d1****-g u 2.x XCL210d2****-g v 3.x XCL210d3****-g x 4.x XCL210d4****-g mark output voltage(v) product series x.0 0 XCL210**0***-g x.05 a XCL210**a***-g x.1 1 XCL210**1***-g x.15 b XCL210**b***-g x.2 2 XCL210**2***-g x.25 c XCL210**c***-g x.3 3 XCL210**3***-g x.35 d XCL210**d***-g x.4 4 XCL210**4***-g x.45 e XCL210**e***-g x.5 5 XCL210**5***-g x.55 f XCL210**f***-g x.6 6 XCL210**6***-g x.65 h XCL210**h***-g x.7 7 XCL210**7***-g x.75 k XCL210**k***-g x.8 8 XCL210**8***-g x.85 l XCL210**l***-g x.9 9 XCL210**9***-g x.95 m XCL210**m***-g 1 2 3 6 5 4
24/24 XCL210 series 1. the product and product specific ations 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 datasheet is up to date. 2. the information in this datasheet is intended to illustrate the operation and characteristics of our products. we neither make warrantie s or representations with respect to the accuracy or completeness of the information contained in this datasheet nor gr ant any license to any intellectual property rights of ours or any third party concerning with the information in this datasheet. 3. applicable export control laws and regulations should be complied and the procedures required by such laws and regulations should also be followed, when the product or any information contained in this datasheet is exported. 4. the product is neither intended nor warranted for use in equipment of systems which require extremely high levels of quality and/or reliability and/or a ma lfunction or failure which may cause loss of human life, bodily injury, serious property damage including but not limited to devices or equipment used in 1) nuclear facilities, 2) aerospace industry, 3) medi cal facilities, 4) automobile industry and other transportation industry and 5) safety devices and safety equipment to control combustions and explosions. do not use the product for the above us e unless agreed by us in writing in advance. 5. although we make continuous effo rts to improve the quality and reliab ility of our products; nevertheless semiconductors are likely to fail with a certain probabi lity. so in order to prevent personal injury and/or property damage resulting from such failure, cust omers are required to incorporate adequate safety measures in their designs, such as system fail safes, redundancy and fire prevention features. 6. our products are not designed to be radiation-resistant. 7. please use the product listed in this datasheet within the specified ranges. 8. we assume no responsibility for damage or loss due to abnormal use. 9. all rights reserved. no part of this datasheet may be copied or reproduced unless agreed by torex semiconductor ltd in writing in advance. torex semiconductor ltd.

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