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1/28 XC9140 series step-up synchronous pfm dc/dc converter features input voltage range : 0.9v~5.5v output voltage setting : 1.8v~5.0v (2.0%) 0.1v increments output current : 100ma v out =3.3v, v bat =1.8v (typ.) driver transistor : 0.6 ? nch driver transistor 0.65 ? pch synchronous rectifier switch transistor supply current : 6.3 a (v bat =v out +0.5v) control method : pfm control high speed transient response : 50mv@v out =3.3v, v bat =1.8v, i out =1 50ma pfm switching current : 350ma functions : load disconnection function or bypass mode function uvlo function ceramic capacitor operating ambient temperature :-40 +85 packages : sot-25, usp-6el environmentally friendly : eu rohs compliant, pb free general description the XC9140 series are step-up synchronous dc/dc converters that support ceramic capacitors and have an internal 0.6 ? (typ.) nch driver transistor and an internal 0.65 ? (typ.) pch synchronous rectifier switch transistor. pfm control enables a low quiescent current, making these products ideal for portable devices that require high efficiency. when the output voltage is 3.3v and the load current is 1ma (XC9140axx1 type and XC9140cxx1 type), startup from an input voltage of v in = 0.9v is possible which means that these products can be used in applications that start using a single alkaline or nickel-metal hydride battery. the output voltage can be set from 1.8v to 5.0v (2.0%) in steps of 0.1v. the XC9140 features a load disconnect function to break conti nuity between the input and output at shutdown (XC9140a), and also a bypass mode function to maintain co ntinuity between the input and output (XC9140c). a version with a uvlo (under voltage lock-out) function is also available. this function enables the prevention of battery leak age by stopping ic?s operation when the input voltage is low. the st andard product has a uvlo release voltage of 2.15v (3.0%), and a custom version with a release voltage selectable from between 1.65v to 2.2v, in steps of 0.05v, is also available. applications mouses, keyboards bluetooths household use medical equipments remote controls game consoles devices with 1~3 alkaline, 1~3 nickel hydride, 1 lithium and 1 li-ion greeno p eration com p atible etr04015-003 typical application circuit lx vbat vout gnd ce l=4.7h c l =10f c in =10f v in =0.95.5v c in =4.7 f typical performance characteristics efficiency vs. output current 0 20 40 60 80 100 0.01 0.1 1 10 100 1000 output current : i out (ma) efficiency : effi (%) 3.0v v bat =1.8v 2.5v XC9140a331mr-g(v out =3.3v) l= 4.7 h( vlf302512m- 4r7m) ,c in =4.7 f(lmk107bj475ma), c l =10 f( lm k107bj106ma)
2/28 XC9140 series block diagram product classification designator item symbol description a load disconnection without c l auto discharge (*1) product type c v bat bypass without c l auto discharge ? (*2) output voltage 18 50 output voltage e.g. v out =3.3v ? =3, =3 1 no uvlo (*3) uvlo function 2 uvlo function v uvlo_r =2.15v 4r-g usp-6el (3,000/reel) ?- (*4) packages (order unit) mr-g sot-25 (3,000/reel) (*1) the product with the c l discharge function is a semi-custom product. (*2) v out =3.3v is standard. (*3) the standard product has a uvlo release voltage of 2. 15v. for other voltages, consult our sales department. (*4) the ?-g? suffix denotes halogen and antimony free as well as being fully eu rohs compliant. ordering information XC9140 ?????- * diodes inside the circuits are esd protection diodes and parasitic diodes. the XC9140a /XC9140c series do not have the c l discharge function. the XC9140axx1/XC9140cxx1 series do not have the uvlo function.
3/28 XC9140 (design target) XC9140 series pin configuration pin assignment pin number usp-6el sot-25 pin name functions 1 5 l x switching 2 4 v out output voltage 3 3 v bat power input 4 1 ce chip enable 5 - nc no connection 6 2 gnd ground ce pin function pin name signal status h active (all series) ce l stand-by (XC9140a series) or bypass mode (XC9140c series) * please do not leave the ce pin open. absolute maximum ratings parameter symbol ratings units bat pin voltage v bat -0.3 ~ +7.0 v l x pin voltage v lx -0.3 ~ v out +0.3 or +7.0 (*1) v v out pin voltage v out -0.3 ~ +7.0 v ce pin voltage v ce -0.3 ~ +7.0 v l x pin current i lx 700 ma sot-25 250 power dissipation usp-6el pd 120 mw operating ambient temper ature topr -40 ~ +85 ? c storage temperature tstg -55 ~ +125 ? c * all voltages are described based on the gnd. (*1) the maximum value should be either v out +0.3 or +7.0 or in the lowest. ta = 2 5 ? c 13 2 5 4 sot-25 (top view) v out l x ce gnd v bat * the dissipation pad for the usp-6el 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.6).
4/28 XC9140 series electrical characteristics XC9140axx1 type, without uvlo function, without c l discharge function parameter symbol conditions min. typ. max. units circuit input voltage v bat - - - 5.5 v - output voltage v out(e) (*2) v pull =1.5v, voltage to start oscillation while v out is decreasing e1 v operation start voltage v st1 i out =1ma - - 0.9 v operation hold voltage v hld r l =1k ? - 0.7 - v supply current iq oscillation stops, v out =v out(t) +0.5v (*1) e2 a input pin current i bat v out =v out(t) +0.5v (*1) - 0.25 1.0 a stand-by current i stb v bat =v lx =v out(t) (*1) , v out =v ce =0v - 0.1 1.0 a l x leak current i lxl v bat =v lx =v out(t) (*1) , v out =v ce =0v - 0.1 1.0 a pfm switching current i pfm i out =3ma 295 350 405 ma maximum on time t onmax v pull =1.5v, v out =v out( ) 0.98v (*1) 3.1 4.6 6.0 s efficiency (*3) effi v bat =v ce =1.8v, v out(t) (*1) =2.5v, i out =30ma - 81 - % efficiency (*3) effi v bat =v ce =1.8v, v out(t) (*1) =3.3v, i out =30ma - 85 - % efficiency (*3) effi v bat =v ce =1.8v, v out(t) (*1) =5.0v, i out =30ma - 86 - % lx sw ?pch? on resistance (*4) r lxp v bat =v lx =v ce =v out(t) +0.5v (*1) , i out =200ma e3 ? lx sw ?nch? on resistance (*5) r lxn v bat =v ce =3.3v, v out =1.7v - 0.6 - ? ce ?high? voltage v ceh v bat =v pull =1.5v, v out =v out( ) 0.98v (*1) while v ce =0.3 0.75v, voltage to start oscillation 0.75 - 5.5 v ce ?low? voltage v cel v bat =v pull =1.5v, v out =v out( ) 0.98v (*1) while v ce =0.75 0.3v, voltage to stop oscillation gnd - 0.3 v ce ?high? current i ceh v bat =v ce =v lx =v out =5.5v -0.1 - 0.1 a ce ?low? current i cel v bat =v lx =v out =5.5v, v ce =0v -0.1 - 0.1 a unless otherwise stated, v bat =v ce =1.5v (*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 c haracteristic example. (*3) effi=[{ (output voltage)(output current)] / [(input voltage)(input current)}]100 (*4) lx sw ?pch? on resistance=(v lx -v out pin measurement voltage) / 200ma (*5) the lx sw ?nch? on resistance measurement met hod is shown in the meas urement circuit diagram. ta = 2 5 ? c
5/28 XC9140 (design target) XC9140 series electrical characteristics (continued) XC9140cxx1 type, without uvlo function, without c l discharge function parameter symbol conditions min. typ. max. units circuit input voltage v bat - - 5.5 v - output voltage v out(e) (*2) v pull =1.5v, voltage to start oscillation while v out is decreasing e1 v operation start voltage v st1 i out =1ma - - 0.9 v operation hold voltage v hld r l =1k ? - 0.7 - v supply current iq oscillation stops, v out =v out(t) +0.5v (*1) e2 a input pin current i bat v out =v out(t) +0.5v (*1) - 0.25 1.0 a bypass mode current i byp v bat =v lx =5.5v, v ce =0v - 3.5 6.1 a pfm switching current i pfm i out =3ma 295 350 405 ma maximum on time t onmax v pull =1.5v, v out =v out( ) 0.98v (*1) 3.1 4.6 6.0 s efficiency (*3) effi v bat =v ce =1.8v, v out(t) (*1) =2.5v, i out =30ma - 81 - % efficiency (*3) effi v bat =v ce =1.8v, v out(t) (*1) =3.3v, i out =30ma - 85 - % efficiency (*3) effi v bat =v ce =1.8v, v out(t) (*1) =5.0v, i out =30ma - 86 - % lx sw ?pch? on resistance (*4) r lxp v bat =v lx =v ce = v out(t) +0.5v (*1) , i out =200ma e3 ? lx sw ?nch? on resistance (*5) r lxn v bat =v ce =3.3v, v out =1.7v - 0.6 - ? ce ?high? voltage v ceh v bat =v pull =1.5v, v out =v out( ) 0.98v (*1) while v ce =0.3 0.75v, voltage to start oscillation 0.75 - 5.5 v ce ?low? voltage v cel v bat =v pull =1.5v, v out =v out( ) 0.98v (*1) while v ce =0.75 0.3v, voltage to stop oscillation gnd - 0.3 v ce ?high? current i ceh v bat =v ce =v lx =v out =5.5v -0.1 - 0.1 a ce ?low? current i cel v bat =v lx =v out =5.5v, v ce =0v -0.1 - 0.1 a unless otherwise stated, v bat =v ce =1.5v (*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 c haracteristic example. (*3) effi={[(output voltage)(output current)] / [(input voltage)(input current)]}100 (*4) lx sw ?pch? on resistance=(v lx -v out pin measurement voltage) / 200ma (*5) the lx sw ?nch? on resistance measurement met hod is shown in the meas urement circuit diagram. ta = 2 5 ? c
6/28 XC9140 series electrical characteristics (continued) XC9140axxx types (types other than XC9140axx1), with uvlo function, without c l discharge function parameter symbol conditions min. typ. max. units circuit input voltage v bat - - - 5.5 v output voltage v out(e) (*2) v pull =1.5v, voltage to start oscillation while v out is decreasing e1 v operation start voltage v st1 i out =1ma - - v release(e) (*7) v operation hold voltage v hld r l =1k ? v detect(e) (*8) - - v supply current2 iq oscillation stops, v out =v out(t) +0.5v (*1) e4 a input pin current2 i bat v out =v out(t) +0.5v (*1) e5 a stand-by current i stb v bat =v lx =v out(t) (*1) , v out =v ce =0v - 0.1 1.0 a l x leak current i lxl v bat =v lx =v out(t) (*1) , v out =v ce =0v - 0.1 1.0 a pfm switching current i pfm i out =3ma 295 350 405 ma maximum on time t onmax v pull = v release(t) +0.1v (*6) , v out =v out( ) 0.98v (*1) 3.1 4.6 6.0 s efficiency (*3) effi v out(t) (*1) =2.5v, i out =30ma - 81 - % efficiency (*3) effi v out(t) (*1) =3.3v, i out =30ma - 85 - % efficiency (*3) effi v out(t) (*1) =5.0v, i out =30ma - 86 - % lx sw ?pch? on resistance (*4) r lxp v bat =v lx =v ce =v out(t) +0.5v (*1) , i out =200ma e3 ? lx sw ?nch? on resistance (*5) r lxn v bat =v ce =3.3v, v out =1.7v - 0.6 - ? ce ?high? voltage v ceh v bat =v pull = v release(t) +0.1v (*6) , v out =v out( ) 0.98v (*1) while v ce =0.3 0.75v, voltage to start oscillation 0.75 - 5.5 v ce ?low? voltage v cel v bat =v pull = v release(t) +0.1v (*6) , v out =v out( ) 0.98v (*1) while v ce =0.75 0.3v, voltage to stop oscillation gnd - 0.3 v ce ?high? current i ceh v bat =v ce =v lx =v out =5.5v -0.1 - 0.1 a ce ?low? current i cel v bat =v lx =v out =5.5v, v ce =0v -0.1 - 0.1 a uvlo current i dq v bat = v ce = v detect(e) - 0.1v (*8) , i out =0ma e6 a uvlo release voltage v release(e) (*7) v pull = v out = v out( ) 0.98v (*1) , v bat = v ce voltage to start oscillation while v bat is increasing e7 v uvlo hysteresis voltage v hys(e) (*9) v pull = v out = v out( ) 0.98v (*1) , v bat = v ce v release(e) - voltage to stop oscillation while v bat is decreasing (*7) 0.1 0.15 0.2 v unless otherwise stated,, v bat =v ce =v release(t) +0.1v (*6) (*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 peripheral components, is boost ed by the ripple voltage average value. pl ease refer to the characteristic exampl e. (*3) effi=[{ (output voltage)(output current)] / [(input voltage)(input current)}]100 (*4) lx sw ?pch? on resistance=(v lx -v out pin measurement voltage) / 200ma (*5) the lx sw ?nch? on resistance measurement me thod is shown in the meas urement circuit diagram. (*6) v release(t) = nominal uvlo release voltage (*7) v release(e) = actual uvlo release voltage (*8) v detect(e) =v release(e) -v hys(e) = actual uvlo detect voltage (*9) v hys(e) = actual uvlo hysteresis voltage ta = 2 5 ? c
7/28 XC9140 (design target) XC9140 series electrical characteristics (continued) XC9140cxxx type (types other than XC9140cxx1), with uvlo function, without c l discharge function parameter symbol conditions min. typ. max. units circuit input voltage v bat - - 5.5 v output voltage v out(e) (*2) v pull =1.5v, voltage to start oscillation while v out is decreasing e1 v operation start voltage v st1 i out =1ma - - v release(e) (*7) v operation hold voltage v hld r l =1k ? v detect(e) (*8) - - v supply current2 iq oscillation stops, v out =v out(t) +0.5v (*1) e4 a input pin current2 i bat v out =v out(t) +0.5v (*1) e5 a bypass mode current i byp v bat =v lx = v release(t) +0.1v (*6) , v ce =0v - 5.5 8.1 a pfm switching current i pfm i out =3ma 295 350 405 ma maximum on time t onmax v pull = v release(t) +0.1v (*6) , v out =v out( ) 0.98v (*1) 3.1 4.6 6.0 s efficiency (*3) effi v out(t) (*1) =2.5v, i out =30ma - 81 - % efficiency (*3) effi v out(t) (*1) =3.3v, i out =30ma - 85 - % efficiency (*3) effi v out(t) (*1) =5.0v, i out =30ma - 86 - % lx sw ?pch? on resistance (*4) r lxp v bat =v lx =v ce = v out(t) +0.5v (*1) , i out =200ma e3 ? lx sw ?nch? on resistance (*5) r lxn v bat =v ce =3.3v, v out =1.7v - 0.6 - ? ce ?high? voltage v ceh v bat =v pull = v release(t) +0.1v (*6) , v out =v out( ) 0.98v (*1) while v ce =0.3 0.75v, voltage to start oscillation 0.75 - 5.5 v ce ?low? voltage v cel v bat =v pull = v release(t) +0.1v (*6) , v out =v out( ) 0.98v (*1) while v ce =0.75 0.3v, voltage to stop oscillation gnd - 0.3 v ce ?high? current i ceh v bat =v ce =v lx =v out =5.5v -0.1 - 0.1 a ce ?low? current i cel v bat =v lx =v out =5.5v, v ce =0v -0.1 - 0.1 a uvlo current i dq v bat = v ce = v detect(e) - 0.1v (*8) , i out =0ma e6 a uvlo bypass current i dbyp v bat = v lx = v detect(e) - 0.1v (*8) , v ce =0v e8 a uvlo release voltage v release(e) (*7) v pull = v out = v out( ) 0.98v (*1) , v bat = v ce voltage to start oscillation while v bat is increasing e7 v uvlo hysteresis voltage v hys(e) (*9) v pull = v out = v out( ) 0.98v (*1) , v bat = v ce v release(e) - voltage to stop oscillation while v bat is decreasing (*7) 0.1 0.15 0.2 v unless otherwise stated, v bat =v ce = v release(t) +0.1v (*6) (*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 peripheral components, is boost ed by the ripple voltage average value. pl ease refer to the characteristic exampl e. (*3) effi=[{ (output voltage)(output current)] / [(input voltage)(input current)}]100 (*4) lx sw ?pch? on resistance=(v lx -v out pin measurement voltage) / 200ma (*5) the lx sw ?nch? on resistance measurement met hod is shown in the meas urement circuit diagram. (*6) v release(t) = nominal uvlo release voltage (*7) v release(e) = actual uvlo release voltage (*8) v detect(e) = v release(e) -v hys(e) = actual uvlo detect voltage (*9) v hys(e) = actual uvlo hysteresis voltage ta = 2 5 ? c
8/28 XC9140 series electrical characteristics (continued) XC9140 voltage chart 1 symbol e1 e2 e3 e4 parameter output voltage supply current lx sw ?pch? on resistance supply current2 units: v units: v units : a units : ? units : a output voltage min. max. typ. max. typ. max. typ. max. 1.8 1.764 1.836 1.9 1.862 1.938 2.0 1.960 2.040 2.1 2.058 2.142 2.2 2.156 2.244 6.1 9.4 0.84 1.08 6.8 9.7 2.3 2.254 2.346 2.4 2.352 2.448 2.5 2.450 2.550 2.6 2.548 2.652 2.7 2.646 2.754 2.8 2.744 2.856 2.9 2.842 2.958 6.2 9.7 0.75 0.97 6.9 9.8 3.0 2.940 3.060 3.1 3.038 3.162 3.2 3.136 3.264 3.3 3.234 3.366 3.4 3.332 3.468 6.3 10.0 0.65 0.85 7.0. 10.0 3.5 3.430 3.570 3.6 3.528 3.672 3.7 3.626 3.774 3.8 3.724 3.876 3.9 3.822 3.978 6.4 10.2 0.61 0.78 7.1 10.1 4.0 3.920 4.080 4.1 4.018 4.182 4.2 4.116 4.284 4.3 4.214 4.386 4.4 4.312 4.488 6.5 10.4 0.57 0.74 7.2 10.2 4.5 4.410 4.590 4.6 4.508 4.692 4.7 4.606 4.794 4.8 4.704 4.896 4.9 4.802 4.998 5.0 4.900 5.100 6.7 10.7 0.53 0.72 7.3 10.3
9/28 XC9140 (design target) XC9140 series electrical characteristics (continued) XC9140 voltage chart 2 symbol e5 e6 e7 e8 parameter input pin current2 uvlo current uvlo release voltage uvlo bypass current units: v units : a units : a units: v units : a uvlo release voltage typ. max. typ. max. min. max. typ. max. 1.65 1.601 1.699 1.70 0.71 1.50 3.25 6.00 1.649 1.751 2.15 4.10 1.75 1.698 1.802 1.80 0.73 1.60 3.27 6.10 1.746 1.854 2.20 4.20 1.85 1.795 1.905 1.90 0.75 1.60 3.29 6.20 1.843 1.957 2.30 4.20 1.95 1.892 2.008 2.00 0.77 1.60 3.31 6.20 1.940 2.060 2.35 4.30 2.05 1.989 2.111 2.10 0.79 1.70 3.33 6.30 2.037 2.163 2.40 4.30 2.15 2.086 2.214 2.20 0.82 1.70 3.35 6.30 2.134 2.266 2.45 4.40
10/28 XC9140 series test circuits use test circuit no.8 to adjust v pull so that the l x pin voltage becomes 100mv when the nch drive tr is on and then the voltage at both ends of r pull is measured to find the lx sw "nch" on resistance. r lxn =0.1 / {(v1 - 0.1) / 4.7)} note that v1 is the r pull previous voltage when the nch driver tr is on. use an oscilloscope or other instrument to measure the l x pin voltage and v1.
11/28 XC9140 (design target) XC9140 series typical application circuit reference external components manufacture product number value l tdk vlf302512m-4r7 4.7 h c in taiyo yuden lmk107bj475ma 4.7 f/10v c l taiyo yuden lmk107bj106ma 10 f/10v * when selecting components, take into consi deration capacitance reduction, voltage, etc. * the characteristics are dependent on the variation in the coil i nductance value, so check these carefully in the actual produ ct. * a coil inductance value of 4.7 to 10.0 h can be used, but using 4.7 h is recommended. * the ripple voltage will increase if tantalum or electr olytic capacitors are used for the load capacitor c l . the operation could also become unstable, so carefully check this in the actual product.
12/28 XC9140 series operational explanation the XC9140 series consists of a standard voltage source, a pfm comparator, a nch driver tr, a pch synchronous rectifier switch tr, a current sense circuit, a pfm control ci rcuit and a ce control circuit, etc. (refer to the block diagram below.) current limit pfm control is used for the control method to ma ke it difficult for the output voltage ripple to increase even w hen the switching current is superimposed, so the product can be used within a wi de voltage and current range. further, because pfm control is us ed, it has excellent transient response to support low capacity ceramic ca pacitors to realize a compac t, high-performance boost dc/dc conv erter. the synchronous driver and rectifier switch tr efficiently sends the coil energy to the capacitor connected to the v out pin to achieve highly efficient operation from low to high loads. the electrical characterist ics actual output voltage v out(e) is the pfm comparator threshold voltage shown in the block diagram. therefore, the booster circuit output voltage average val ue, including the peripheral components, depends on the ripple voltage, so this m ust be carefully evaluated before being used in the actual product. < reference voltage source (v ref )> the reference voltage source (v ref voltage) provides the reference voltage to ensur e stable output voltage of the dc/dc converter. < pfm control > the voltage from the output voltage divided by the division resistors r fb1 and r fb2 in the ic is used as feedback voltage (fb voltage), and the pfm comparator is compared with the fb voltage and v ref . if the fb voltage is lower than v ref , the signal is sent to the buffer driver via the pfm control circuit and the nch driver tr is turned on. if the fb voltage is higher than v ref , the pfm comparator sends a signal that does not turn on the nch driver tr. the current sense circuit monitors the current flowing in the nch driver tr connec ted to the lx pin when the nch driver tr is o n. when the prescribed pfm switching current (i pfm ) is reached, the signal is sent to the buffer driver via the pfm control circuit to turn off the nch driver tr and turn on the pch synchronous rectifier switch tr. the pch synchronous rectifier switch tr on time (off time) is dynamically optimized internally. after the off time has passed, when the pfm comparator confirms the v out voltage has exceeded the set voltage, a signal that does not a llow the nch driver tr to be turned on is sent from the pfm comparator to the pfm control circuit, but if the v out voltage remains lower than the set voltage, then nch driver tr on is started. the intervals of the above ?? linked operations are continuously adjus ted in response to the load current to ensure the output voltage is kept stable from low to high loads and t hat it is done with good efficiency. v lx v out i lx v lx v out i lx v out(e) v out voltage a ve ra g e v out(e) i pfm v out :50mv/div v lx :2v/div i lx :200ma/div v out voltage a ve ra g e v bat =v ce =2.0v v out =3.3v i out =20ma l=4.7 h c l =10 f ta=25 2[ s/div] 2[ s/div] v bat =v ce =2.0v v out =3.3v i out =70ma l=4.7 h c l =10 f ta=25 - + pfm controller current sense v ref pfm comparator ce and bypass controller logic ce v out gnd l x c l discharge parasitic diode controller v bat ?v out detector v dd v bat - + hysteresis uvlo comparator r fb1 r fb2 fb c fb v out v out buffer driver and inrush currrent protection pfm comparator unit
13/28 XC9140 (design target) XC9140 series operational explanation (continued) the pfm switching current unit monitors the current flowing in the nch driver tr and functions to limit the current flowing in the nch driver tr, but if the load current becomes much larger than the pfm switching energy, the v out voltage becomes lower and prevents the coil current in the nch driver tr off period from lowering, which affects the inter nal circuit delay time and results in an excessive current that is larger than the pfm switching current flowing in the nch driver tr and pch synchronous rectifier switch tr. when a "l" voltage is input to the ce pin, the XC9140a type enters into standby mode and the XC9140c type enters into bypass m ode to stop the circuit required for the boost operation. in the standby mode the load cut-off function operates and both the nch driver tr and pch synchronous rectifier switch tr are turned off, which cuts off the current to the l x pin and v out pin and the parasitic diode control circuit connects the parasitic diode cathode of the pch synchronous rectifier switch tr to the l x pin . in the bypass mode the nch driver tr is off, the pch synchronous rectifier switch tr is on when v lx > v out , and the parasitic diode control circuit connects the parasitic diode cathode of the pch synchronous rectifier switch tr to the v out pin . also, when v lx < v out , the pch synchronous rectifier switch tr is turned off and the parasitic diode cathode is connected to the v out pin . note: except for the moment when the v bat voltage is input. < v bat -v out voltage detection circuit> the v bat -v out voltage detection circuit compares the v bat pin voltage with the v out pin voltage, and whichever is the highest is operated to become the ic power supply (v dd ). in addition, if, during normal operation, t he input voltage becomes higher than the output voltage, the nch driver tr is turne d off and the pch synchronous rectifier switch tr is kept on so that t he input voltage pass through to the output voltage (through mode). whe n the input voltage becomes lower than the output voltage, the circuit automat ically returns to the normal boost operation. this detection circuit does not operate when in the standby mode. when the v bat or v ce power supply is input, c l is charged via the stable current that results fr om the inrush current protection function (refer to graphs below). therefore, this function minimizes potential over current from the v bat pin to the v out pin. also, this current value depends on the v bat voltage. after c l is charged by the aforementioned stable current and v out reaches around the v bat voltage level, the inrush current protection function will be released after several hundred s ~ several ms and the ic will then move to step-up mode, by pass mode or through mode. inrush current protection characteristics 0 50 100 150 200 250 300 0.5 1.0 1.5 2.0 2.5 3.0 inrush current protection (ma ) 200 250 300 350 400 450 500 550 600 3.0 3.5 4.0 4.5 5.0 5.5 l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =10 f(lmk107bj106ma),i out =1ma,ta=25 input voltage: v bat (v)
14/28 XC9140 series operational explanation (continued) the uvlo function is selectable on t he XC9140 series as an option. when the v bat pin voltage falls below the uvlo detect voltage, the ic stops switching or bypass operation and cuts off the current to the l x pin and v out pin (uvlo mode). in addition, when the v bat pin voltage recovers to above the uvlo release voltage, the ic begins operating again. with the XC9140 series an optional c l discharge function (under development) can be sele cted. this function uses the nch tr connected between v out and gnd to discharge, at high speed, the load capacity c l charge when the "l" voltage is input to the ce pin (when in the ic standby mode). this is done to prevent malfunction of the application caused by a residual charge in c l when the ic is stopped. the discharge time is determined by the c l discharge resistance r dchg , including the nch tr, and c l . the constant =c l r dchg is determined at this time, and the following formula is used to find the output voltage discharge time. however, the c l discharge resistance r dchg varies depending on the v bat or v out voltage, so the discharge time cannot be determined easily. therefore, carefully check this in the actual product. v=v out e - t / or t= in(v out / v) v: output voltage after discharge v out : output voltage : discharge time : c l r dchg c l : capacity value of the load capacitor (c l ) r dchg : low resistance value of the c l discharge resistance. however, this changes depending on the voltage. the XC9140a/ XC9140c series do not have a c l discharge function as standard.
15/28 XC9140 (design target) XC9140 series note on use 1. be careful not to exceed the absolute maximum ratings for externally connected components and this ic. 2. the dc/dc converter characteristics greatly depend not only on t he characteristics of this ic but also on those of externall y connected components, so refer to the specifications of each component and be careful 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 characteristics (jis standard) or an x7r/x5r (eia standard) ceramic capacitor. 3. use a ground wire of sufficient strength. ground potential fl uctuation caused by the ground cu rrent during switching could c ause the ic operation to become unstable, so reinforce the ar ea 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. an excessive current that is larger t han the pfm switching current flowing in the nch driver tr and pch synchronous rectifie r switch tr, which could destroy the ic. 6. when in the bypass mode, the internal pch synchronous rectifier switch tr turns on to allow current to flow to the lx pin an d v out pin. when an excessive current comes from the v out pin when this bypass operates, it could destroy the pch synchronous rectifier switch tr. 7. the ce pin does not have an internal pull-up or pull- down, etc. apply the prescribed voltage to the ce pin. 8. the coil inductance value applicable range is 4.7 h to 10 h, but 4.7 h is recommended because at this value the coil size and dc/dc performance are optimized. if you want to use another inductance value other than 4.7 h but which is in the above applicable range, be sure to carefully evaluate it first before use. 9. at high temperatures, the product perform ance could vary causing the ef ficiency to decline. evaluate this carefully before u se if the product will be used at high temperatures. 10. please note that the leak current of the pch synchronous rectifier switch tr during high-temperature standby operation coul d cause the output voltage to increase. 11. the output voltage ripple effect from the load current causes the output voltage average value to fluctuate, so carefully e valuate this in the actual product before use. 12. when the booster circuit is activated by a low input volt age, during the time until the output voltage reaches about 1.7v, the pfm switching current function might not operate causing the coil cu rrent to be superimposed. (see the figure below.) v bat =v ce =0 0.9v v out =1.8v i out =1ma l=4.7 h c l =10 f ta=25 200[ s/div] 50[ s/div] v bat =v ce v lx v out i lx v bat =v ce v lx v out i lx v bat =v ce :1.0v/div v out :1.0v/div v lx :2.0v/div i lx :200ma/div v bat =v ce :1.0v/div v out :1.0v/div v lx :2.0v/div i lx :200ma/div zoom 200[ s/div] 50[ s/div] v bat =v ce =0 1.7v v out =1.8v i out =1ma l=4.7 h c l =10 f ta= 25 v bat =v ce v out v lx i lx v bat =v ce v lx v out i lx v bat =v ce :1.0v/div v out :1.0v/div v lx :2.0v/div i lx :200ma/div zoom v bat =v ce :1.0v/div v out :1.0v/div v lx :2.0v/div i lx :200ma/div
16/28 XC9140 series note on use (continued) 13. if the c l capacity or load current becomes excessively large, the output voltage start-up time, when the power is turned on, will increa se, so the coil current might be superimposed during the time it takes for the output voltage to become sufficiently higher than the v bat voltage. 14. if the input voltage is higher than the output voltage, then th e circuit automatically enters the through mode. when the in put voltage becomes close to the output voltage, there could be repeated switching between the boost mode and through mode causing the ripple volta ge to fluctuate. (refer to the graphic below) 15. if a different power supply is connected from an exter nal source to the XC9140a/XC9140c, the ic could be destroyed. 16. for temporary, transitional voltage drop or voltage rising phenomenon, the ic is liable to ma lfunction should the ratings b e exceeded. 17. torex places an importance on impr oving our products and their reliability. we request that users incorporate fail-sa fe designs and post-aging protec tion treatment when using torex products in their syst ems. 18. with the XC9140a, when the v bat or v ce power supply is input, if the v out pin voltage does not exceed v bat -0.35v, which can happen due to the load current being more than the inrush protection current, step-up mode or through mode operations won?t function correctl y. 19. with the XC9140c, when the v bat power supply is input, if the v out pin voltage does not exceed v bat -0.35v, which can happen due to the load current being more than the inrush protection cu rrent, by pass mode operations won?t function correctly. 20. in the case of products with the uvlo function that do not have c l discharge, the output voltage may occasionally rise due to leakage current from the pch synchronous switch tr when high-temperature uvlo mode operates. v bat =v ce =3.316v,v out =3.412v,i out =3ma,l=4.7 h,c l =10 f,ta=25 v out v bat :100mv/div v lx 200[ s/div] v out :100mv/div v bat v lx :2.0v/div
17/28 XC9140 (design target) XC9140 series note on use (continued) instructions of pattern layouts 1. in order to stabilize v bat voltage level, we recommend that a by-pass capacitor (c in ) be connected as close as possible to the v bat and ground pins. 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 connecting traces to reduce the circuit impedan ce. 4. make sure that the ground traces are as thick as possibl e, 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 (sot-25) recommended pattern layout (usp-6el) front back front back
18/28 XC9140 series typical performance characteristics (1) (2) ?R - 2.9 3.1 3.3 3.5 3.7 3.9 0.01 0.1 1 10 100 1000 output current : i out (ma) output voltage : v out (v) 3.0v 2.5v v bat =1.8v XC9140a331mr-g(v out =3.3v) l=10 h(vlf302512m-100m),c in =4.7 f(lmk107bj475ma), c l =10 f(lmk107bj106ma) 0 20 40 60 80 100 0.01 0.1 1 10 100 1000 output current : i out (ma) efficiency : effi (%) v bat =3.0v 4.2v 3.7v XC9140a501mr-g(v out =5.0v) l=10 h(vlf302512m-100m),c in =4.7 f(lmk107bj475ma), c l =10 f(lmk107bj106ma) 0 20 40 60 80 100 0.01 0.1 1 10 100 1000 output current : i out (ma) efficiency : effi (%) 3.0v v bat =1.8v 2.5v XC9140a331mr-g(v out =3.3v) l=10 h(vlf302512m-100m),c in =4.7 f(lmk107bj475ma), c l =10 f(lmk107bj106ma) 0 20 40 60 80 100 0.01 0.1 1 10 100 1000 output current : i out (ma) efficiency : effi (%) v bat =3.0v 4.2v 3.7v XC9140a501mr-g(v out =5.0v) l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =10 f(lmk107bj106ma) 0 20 40 60 80 100 0.01 0.1 1 10 100 1000 output current : i out (ma) efficiency : effi (%) 3.0v v bat =1.8v 2.5v XC9140a331mr-g(v out =3.3v) l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =10 f(lmk107bj106ma) 2.9 3.1 3.3 3.5 3.7 3.9 0.01 0.1 1 10 100 1000 output current : i out (ma) output voltage : v out (v) 3.0v 2.5v v bat =1.8v XC9140a331mr-g(v out =3.3v) l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l = 10 f(lmk107bj106ma) XC9140a331mr-g(v out =3.3v) l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =10 f(lmk107bj106ma) (1) efficiency vs. output current (2) output voltage vs. output current
19/28 XC9140 (design target) XC9140 series typical performance characteristics (continued) (3) ?R - 0 50 100 150 200 250 300 0.01 0.1 1 10 100 1000 output current : i out (ma) ripple voltage : vr (mv) 4.2v 3.7v v bat =3.0v XC9140a501mr-g(v out =5.0v) l=10 h(vlf302512m-100m),c in =4.7 f(lmk107bj475ma), c l =10 f(lmk107bj106ma) 0 50 100 150 200 250 300 0.01 0.1 1 10 100 1000 output current : i out (ma) ripple voltage : vr (mv) 3.0v 2.5v v bat =1.8v XC9140a331mr-g(v out =3.3v) l=10 h(vlf302512m-100m),c in =4.7 f(lmk107bj475ma), c l =10 f(lmk107bj106ma) 4.6 4.8 5.0 5.2 5.4 5.6 0.01 0.1 1 10 100 1000 output current : i out (ma) output voltage : v out (v) v bat =3.0v 3.7v 4.2v XC9140a501mr-g(v out =5.0v) l=10 h(vlf302512m-100m),c in =4.7 f(lmk107bj475ma), c l =10 f(lmk107bj106ma) 0 50 100 150 200 250 300 0.01 0.1 1 10 100 1000 output current : i out (ma) ripple voltage : vr (mv) 4.2v 3.7v v bat =3.0v XC9140a501mr-g(v out =5.0v) l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =10 f(lmk107bj106ma) 0 50 100 150 200 250 300 0.01 0.1 1 10 100 1000 output current : i out (ma) ripple voltage : vr (mv) v bat =1.8v 3.0v 2.5v XC9140a331mr-g(v out =3.3v) l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =10 f(lmk107bj106ma) 4.6 4.8 5.0 5.2 5.4 5.6 0.01 0.1 1 10 100 1000 output current : i out (ma) output voltage : v out (v) v bat =3.0v 3.7v 4.2v XC9140a501mr-g(v out =5.0v) l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =10 f(lmk107bj106ma) (2) output voltage vs. ou tput current (continued) (3) ripple voltage vs. output current
20/28 XC9140 series typical performance characteristics (continued) (4) ?R - ?? (5) M - ?? (6) - ?? (7) - ?? 0.0 0.5 1.0 1.5 2.0 2.5 3.0 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) stand-by current: i stb ( a) v out =5.0v 3.0v 1.8v XC9140a 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) input pin current: i bat ( a) v out =5.0v 3.0v XC9140xxx1 0 2 4 6 8 10 12 14 16 18 20 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) supply current: iq ( a) XC9140xxx1 v out =5.0v 3.0v 4.7 4.8 4.9 5.0 5.1 5.2 5.3 -50 -25 0 25 50 75 100 ambient temperature: ta( ) output voltage : v out (v) XC9140x50x(v out =5.0v) 3.0 3.1 3.2 3.3 3.4 3.5 3.6 -50 -25 0 25 50 75 100 ambient temperature: ta( ) output voltage : v out (v) XC9140x33x(v out =3.3v) (4) output voltage vs. ambient temperature (5) supply current vs. ambient temperature (6) input pin current vs. ambient temperature (7) stand-by current vs. ambient temperature
21/28 XC9140 (design target) XC9140 series typical performance characteristics (continued) (8) pfm ? - ?? (9) pfm ? - ?R (10) on rg - ?? (11) lxsw"nch"on ? - ?R (12) lxsw"pch"on ? - ?R (13) lx ` - ?? 0.0 0.5 1.0 1.5 2.0 2.5 3.0 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) lx leak current : i lxl ( a) v lx =5.0v 3.3v 1.8v x c9140axx1 v bat =v lx =v out(e) , v out =v ce =0 v 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 output voltage : v out (v) lx sw ?pch? on resistance: r lxp ( ? ) XC9140xxx1 v bat =v lx =v ce =v out (e) +0.5v,i out =200ma ta=85 25 -40 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 output voltage : v out (v) lx sw ?nch? on resistance: r lxn ( ? ) XC9140 ta=85 25 -40 0.0 2.0 4.0 6.0 8.0 10.0 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) max on time: t onmax (us) XC9140 v out =3.0v 5.0v 1.8v 0 50 100 150 200 250 300 350 400 450 500 0123456 input voltage: v bat (v) pfm switching current: i pfm (ma) XC9140x50x l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =10 f(lmk107bj106ma) 0 50 100 150 200 250 300 350 400 450 500 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) pfm switching current: i pfm (ma) XC9140 l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l = 10 f(lmk107bj106ma) v out =5.0v 3.0v 1.8v XC9140 l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =10 f(lmk107bj106ma) (8) pfm switching current vs. ambient temperature (9) pfm switching current vs. input voltage (10) max. on time vs. ambient temperature (11) lx sw ?nch? on resistance vs. output voltage (12) lx sw ?pch? on resistance vs. output voltage (13) lx leak current vs. ambient temperature
22/28 XC9140 series typical performance characteristics (continued) (14) ce"h" ?R - ?R (15) ce"l" ?R - ?R (16) _??R - ?? (17) ?R - ?? ( 18 ) uvlo ?R - ?? 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) operation hold voltage : v hld (v) v out =5.0v 3.3v 1.8v XC9140xxx1 l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =10 f(lmk107bj106ma),r l =1k 0.4 0.5 0.6 0.7 0.8 0.9 1.0 -50-25 0 255075100 ambient temperature: ta ( ) operation start voltage : v st1 (v) v out =1.8v 3.3v 5.0v XC9140xxx1 l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =10 f(lmk107bj106ma),r l =v out (e) /1ma 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0123456 output voltage : v out (v) ce ?low? voltage: v cel (v) x c9140 ta=-40 25 85 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0123456 output voltage : v out (v) ce ?high? voltage: v ceh (v) XC9140 ta=-40 25 85 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) uvlo release voltage: v release (v) v release ( t ) = 1.65v XC9140x18x(v out =1.8v) 1.95 2.00 2.05 2.10 2.15 2.20 2.25 2.30 2.35 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) uvlo release voltage: v release (v) v release(t) = 22v XC9140x50x(v out =5.0v) (14) ce ?high? voltage vs. output voltage (15) ce ?low? voltage vs. output voltage (16) operation start voltage vs. ambient tem perature (17) operat ion hold voltage vs. ambient temperature (18) uvlo release voltage vs. ambient temperature 1.95 2.00 2.05 2.10 2.15 2.20 2.25 2.30 2.35 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) uvlo release voltage: v release (v) v release(t) = 2.2v XC9140x50x(v out =5.0v)
23/28 XC9140 (design target) XC9140 series typical performance characteristics (continued) ( 19 ) uvlo ??R - ?? ( 20 ) uvlo ????R - ?? 0.00 0.05 0.10 0.15 0.20 0.25 0.30 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) uvlo hysteresis voltage: v hys (v) v release(t) = 2.2v XC9140x50x(v out =5.0v) 0.00 0.05 0.10 0.15 0.20 0.25 0.30 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) uvlo hysteresis voltage: v hys (v) v release(t) = 1.65v XC9140x18x(v out =1.8v) 1.95 2.00 2.05 2.10 2.15 2.20 2.25 2.30 2.35 -50-25 0 255075100 ambient temperature: ta ( ) uvlo detect voltage: v detect (v) v release(t) = 2.2v XC9140x50x(v out =5.0v) 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80 -50-25 0 255075100 ambient temperature: ta ( ) uvlo detect voltage: v detect (v) v release(t) = 1.65v XC9140x18x(v out =1.8v) (19) uvlo detect voltage vs. ambient temperature (20) uvlo hysteresis volt age vs. ambient temperature (21) no load input current vs. input voltage 0 5 10 15 20 25 30 0.95 1.15 1.35 1.55 1.75 input voltage: v bat (v) no load input current: i in ( a) v release(t) = 1.65v ta=25 XC9140x18x(v out =1.8v) l=4.7 h(vlf302512m- 4r7m),cin=4.7 f( lm k107bj475ma), cl=10 f( lmk107bj106ma) ,v bat = v ce ,i out =0ma 0 5 10 15 20 25 30 1.0 2.0 3.0 4.0 5.0 input voltage: v bat (v) no load input current: i in ( a) v release(t) = 2.2v ta=25 XC9140x50x(v out =5.0v) l= 4.7 h(vlf302512m-4r7m),cin=4.7 f( lmk107bj475ma) , cl=10 f(lm k107bj106ma),v bat = v ce ,i out =0ma
24/28 XC9140 series typical performance characteristics (continued) ( 22 ) uvlo r?Mw?B (23) ?R? 0 5 10 15 20 25 1.01.52.02.53.0 input voltage: v bat (v) uvlo bypass current: i dbyp ( a) v release(t) = 2.2v ta=25 XC9140c50x(v out =5.0v) 0 5 10 15 20 25 1.0 1.5 2.0 2.5 3.0 input voltage: v bat (v) uvlo bypass current: i dbyp ( a) v release(t) = 1.65v ta=25 XC9140c18x(v out =1.8v) x c9140x331 v out =3.3v,v bat =v ce =0 0.9v,r l =3300 ? v out :2v/div,v bat :2v/div,v lx :5v/div,i lx :500ma/div,time:500 s/div l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =10 f(lmk107bj106ma) v out v bat =v ce v lx i lx XC9140x331 v out =3.3v,v bat =v ce =0 1.8v,r l =330 ? v out :2v/div,v bat :2v/div,v lx :5v/div,i lx :500ma/div,time:500 s/div l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =1 0 3.3v,r l =500 ? v out :2v/div,v bat :2v/div,v lx :5v/div,i lx :500ma/div,time:500 s/div l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =10 5.5v,r l =500 ? v out v bat =v ce v lx i lx v out :2v/div,v bat :2v/div,v lx :5v/div,i lx :500ma/div,time:500 s/div l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =1 0 (22) uvlo bypass current vs. input voltage (23) rising output voltage
25/28 XC9140 (design target) XC9140 series typical performance characteristics (continued) (24) ?^? XC9140x181 v out i out v lx i lx v out =1.8v,v bat =v ce =0.9v,i out =1ma 25m a v out :100mv/div,v lx :5v/div,i lx :500ma/div,i out :25ma/div,time:50s/div l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =10 1m a v out :100mv/div,v lx :5v/div,i lx :500ma/div,i out :25ma/div,time:50 s/div l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =10 50m a v out :100mv/div,v lx :5v/div,i lx :500ma/div,i out :50ma/div,time:50 s/div l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =10 1m a v out :100mv/div,v lx :5v/div,i lx :500ma/div,i out :50ma/div,time:50 s/div l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =1 0 100m a v out :100mv/div,v lx :5v/div,i lx :500ma/div,i out :100ma/div,time:50 s/div l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =10 1m a v out :100mv/div,v lx :5v/div,i lx :500ma/div,i out :100ma/div,time:50 s/div l=4.7 h(vlf302512m-4r7m),c in =4.7 f(lmk107bj475ma), c l =10 (24) load transient response
26/28 XC9140 series packaging information sot-25 (unit: mm) usp-6el (unit: mm) usp-6el reference pattern layout (unit: mm) usp-6el reference metal mask design (unit: mm) 2 13 654 1.80.05 0.30.05 (0.55 1.50.05 1pin indent ?????` ??? * a part of the pin may appear from the side of the package because of it?s structure, but reliability of the package and strength will not be changed below the standard.
27/28 XC9140 (design target) XC9140 series marking rule represents product series represents output voltage represents product function ? 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) *no character inversion used. mark product series XC9140a**1/2**-g 4 XC9140c**1/2**-g mark output voltage mark output voltage 0 1.8 3.5 9 2.7 4.4 1 1.9 3.6 a 2.8 4.5 2 2.0 3.7 b 2.9 4.6 3 2.1 3.8 c 3.0 4.7 4 2.2 3.9 d 3.1 4.8 5 2.3 4.0 e 3.2 4.9 6 2.4 4.1 f 3.3 5.0 7 2.5 4.2 h 3.4 - 8 2.6 4.3 mark output voltage uvlo release voltage product series n 1.8 3.4v p 3.5 5.0v no uvlo XC9140a**1**-g r 1.8 3.4v s 3.5 5.0v 2.15 XC9140a**2**-g t 1.8 3.4v u 3.5 5.0v no uvlo XC9140c**1**-g v 1.8 3.4v x 3.5 5.0v 2.15 XC9140c**2**-g 123 54 sot-25 1 2 3 6 5 4 usp-6el sot-25 usp-6el
28/28 XC9140 series 1. the products and product specifications cont ained herein are subject to change without notice to improve performance characteristic s. consult us, or our representatives before use, to confirm that the informat ion in this datasheet is up to date. 2. we assume no responsibility for any infri ngement of patents, pat ent rights, or other rights arising from the use of any information and circuitry in this datasheet. 3. please ensure suitable shipping controls (including fail-safe designs and aging protection) are in force for equipment employing products listed in this datasheet. 4. the products in this datasheet are not devel oped, designed, or approved for use with such equipment whose failure of malfuncti on can be reasonably expected to directly endanger the life of, or cause significant injury to, the user. (e.g. atomic energy; aerospace; transpor t; combustion and associated safety equipment thereof.) 5. please use the products listed in this datasheet 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 dat asheet may be copied or reproduced without the prior permission of torex semiconductor ltd.

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