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1/20 xcl223/XCL224 series 0.4a/0.7a inductor built-in step-d own ?micro dc/dc? converters 0 20 40 60 80 100 0.1 1 10 100 1000 efficiency : effi [%] output current : i out [ma] general description the xcl223/XCL224 series is a synchronous step-down micro dc/ dc converter which integrates an inductor and a control ic in one tiny package (2.25mm 1.5mm, h=0.75mmmax). an internal coil simplifies the circuit and enables minimization of noise and other operational trouble due to the circuit wiring. a wide operating voltage range of 2.5v to 5.5v enables support for applications that require an internally fi xed output voltage (0.8v to 3.6v). t he xcl223/XCL224 series uses synchronous rectification at an oper ating frequency of 3.0mhz. the xcl223/XCL224 series uses hisat-cot synchronous rectification. hisat-cot+pwm control (xcl223) or hisat-cot+automatic pwm/pfm switching control (XCL224) can be selected. the maximum load current can be selected either 400ma or 700ma. the series have a high speed soft-start as fast as 0.3ms in ty pical for quick turn-on. with the built-in uvlo (under voltage lo ck out) function, the internal p-channel driver transistor is forc ed off when input voltage becomes 2.0v or lower. when ce=low, the integrated 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 pgnd pins. the power consumption will be less than 1.0 a. a pplications note book pc tablet pc mobile phone wearable device optical device typical application circuit etr28012-002 greenoperation compatible typical performance characteristics features input voltage : 2.5v 5.5v output voltage : 0.8v 3.6v (2.0%) oscillation frequency :3.0mhz output current : 700ma(type a) 400ma(type b) efficiency : 88% (v in =5.0v, v out =3.3v/300ma) control methods : hisat-cot 100% duty cycle pwm (xcl223) pwm/pfm (XCL224) circuit protection : thermal shut down current limit circuit (drop) short circuit protection functions : soft-start circuit built-in uvlo c l discharge output capacitor : low esr ceramic capacitor operating ambient temperature :- 40 + 105 package : usp-8b04 environmental friendly : eu rohs compliant, pb free xcl223a333d2/XCL224a333d2(v out =3.3v) vin=5.0v xcl223 XCL224 v in pgnd agnd v out l1 l2 v in l x ce v ce v out c in cl
2/20 xcl223/XCL224 series block diagram product classification ordering information xcl223 ????? - pwm XCL224 ????? - pwm/pfm automatic switching control designator item symbol description type a output current : 700ma b output current : 400ma ? output voltage 08 36 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 oscillation frequency 3 3.0mhz ? - (*1) package (order unit) d2-g usp-8b04 (3,000pcs/reel) selection guide type output voltage c l auto- discharge latch or short protection uvlo current limit soft- start thermal shutdown output current a fixed yes yes yes yes fixed yes 700ma b fixed yes yes yes yes fixed yes 400ma (*1) the ?-g? suffix denotes halogen and antimony free as well as being fully eu rohs compliant. * the xcl223 offers a fixed pwm control, a control logic of pwm/pfm selector is fixed at ?pwm? internally. the XCL224 control scheme is a fixed pwm/pfm automatic switching, a control logic of pwm/pfm selector is fixed at ?pwm/pfm automatic switching? internally. diodes inside the circuit are an esd protection diode and a parasitic diode. error amp. high side current limit comparator lx inductor pgnd l2 l1 v in v out phase compensation r2 r1 synch buffer drive logic agnd ce minimum on time generator s r q pwm/pfm selector v in v out vref with soft start ce control logic, uvlo thermal shutdown short protection c fb
3/20 xcl223/XCL224 series pin configuration pin assignment pin number pin name functions 1 pgnd power ground 2 agnd analog ground 3 v out fixed output voltage pin 4 ce chip enable 5 lx switching output 6 v in power input 7 l1 inductor electrodes 8 l2 inductor electrodes function table pin name signal status ce low stand-by high active absolute maximum ratings ta = 2 5 all voltages are described based on t he gnd (agnd and pgnd) pin. (*1) the maximum value should be either v in +0.3 or +6.2 in the lowest voltage (*2) the maximum value should be either v in +0.3 or +4.0 in the lowest voltage parameter symbol ratings units v in pin voltage v in -0.3 ~ + 6.2 v l x pin voltage v lx - 0.3 ~ v in + 0.3 or + 6.2 (*1) v v out pin voltage v out - 0.3 ~ v in + 0.3 or + 4.0 (*2) v ce pin voltage v ce - 0.3 ~ + 6.2 v power dissipation pd 1000 mw operating ambient temper ature topr - 40 ~ + 105 storage temperature t stg - 55 ~ + 125 * please do not leave the ce pin open. bottom view 1 pgnd 2 agnd 3 v out ce 4 l x 5 v in 6 7 l1 l2 8
4/20 xcl223/XCL224 series electrical characteristics xcl223axxxd2/XCL224axxxd2 ta = 2 5 parameter symbol conditions min. typ. max. units circuit output voltage v out when connected to external components, i out =30ma

v operating voltage range v in 2.5 - 5.5 v maximum output current i outmax when connected to external components, v in = 700 - - ma uvlo voltage (*2) v uvlo v out =0.6v, voltage which lx pin holding ?l? level (*6) 1.35 2.00 2.68 v quiescent current (XCL224) i q v out =v out(e) 1.1v - 25 40 a quiescent current (xcl223) i q v out =v out(e) 1.1v - 400 825 a stand-by current i stb v ce =0v - 0.0 1.0 a minimum on time (*2) t onmin when connected to external components, v in =v ce =, i out =1ma

ns thermal shutdown t tsd - 150 - thermal shutdown hysteresis t hys - 30 - lxsw ?h? on resistance r lxh v out =0.6v, i lx =100ma (*3) - 0.14 0.28 ? lxsw ?l? on resistance (*4) r lxl v out =v out(t) 1.1v, i lx =100ma (*3) - 0.10 0.20 ? lxsw ?h? leakage current i leakh v in =5.5v, v ce =0v, v out =0v, v lx =5.5v - 0.0 30.0 a lxsw ?l? leakage current i leakl v in =5.5v, v ce =0v, v out =0v, v lx =0v - 0.0 1.0 a current limit (*5) i limh v out =0.6v, i lx until lx pin oscillates 1.3 1.5 2.5 a output voltage temperature characteristics v out / (v out ? topr) i out =30ma -40 Q to p r Q 105 - 100 - ppm/ ce?h? voltage v ceh v out =0.6v, applied voltage to v ce, voltage changes lx to ?h? level (*6) 1.4 - 5.5 v ce?l? voltage v cel v fb =0.6v, applied voltage to v ce, voltage changes lx to ?l? level (*6) agnd - 0.3 v ce?h? current i ceh v in =5.5v, v ce =5.5v, v out =0v -0.1 - 0.1 a ce?l? current i cel v in =5.5v, v ce =0v, v out =0v -0.1 - 0.1 a soft-start time t ss v ce =0v 5.0v, v out =v out(t) v 0.9 after "h" is fed to ce, the time by when clocks are generated at lx pin. 0.10 0.30 0.50 ms short protection threshold voltage v short sweeping v out , v out voltage which lx becomes ?l? level (*6) 0.17 0.27 0.37 v c l discharge r dchg v ce =0v, v out =4.0v 50 210 300 ? inductance l test freq.=1mhz - 0.47 - h - inductor rated current i dc ? t=+40deg - 0.9 - a - unless otherwise stated, v in =5.0v, v ce =5.0v, v out(t) =nominal voltage note: (*1) when the difference between the input and the output is small, 1 00% duty might come up and internal control circuits keep p-ch driver turning on even though the output current is not so large. if current is further pulled from this state, output vo ltage will decrease because of p-ch driver on resistance. (*2) including uvlo detect voltage, hysteresis operating voltage range for uvlo release voltage. (*3) r lxh =(v in - lx pin measurement voltage) / 100ma, r lxl =lx pin measurement voltage / 100ma (*4) design value for the XCL224 series (*5) current limit denotes the level of detection at peak of coil current. (*6) "h" = v in v in - 1.2v, "l"=- 0.1v + 0.1v
5/20 xcl223/XCL224 series electrical characteristics xcl223bxxxd2/XCL224bxxxd2 ta = 2 5 parameter symbol conditions min. typ. max. units circuit output voltage v out when connected to external components, i out =30ma

v operating voltage range v in 2.5 - 5.5 v maximum output current i outmax when connected to external components, v in = 400 - - ma uvlo voltage (*2) v uvlo v out =0.6v, voltage which lx pin holding ?l? level (*6) 1.35 2.00 2.68 v quiescent current (XCL224) i q v out =v out(e) 1.1v - 25 40 a quiescent current (xcl223) i q v out =v out(e) 1.1v - 400 825 a stand-by current i stb v ce =0v - 0.0 1.0 a minimum on time (*2) t onmin when connected to external components, v in =v ce =, i out =1ma

ns thermal shutdown t tsd - 150 - thermal shutdown hysteresis t hys - 30 - lxsw ?h? on resistance r lxh v out =0.6v, i lx =100ma (*3) - 0.14 0.28 ? lxsw ?l? on resistance (*4) r lxl v out =v out(t) 1.1v, i lx =100ma (*3) - 0.10 0.20 ? lxsw ?h? leakage current i leakh v in =5.5v, v ce =0v, v out =0v, v lx =5.5v - 0.0 30.0 a lxsw ?l? leakage current i leakl v in =5.5v, v ce =0v, v out =0v, v lx =0v - 0.0 1.0 a current limit (*5) i limh v out =0.6v, i lx until lx pin oscillates 1.3 1.5 2.5 a output voltage temperature characteristics v out / (v out ? topr) i out =30ma -40 Q to p r Q 105 - 100 - ppm/ ce?h? voltage v ceh v out =0.6v, applied voltage to v ce, voltage changes lx to ?h? level (*6) 1.4 - 5.5 v ce?l? voltage v cel v fb =0.6v, applied voltage to v ce, voltage changes lx to ?l? level (*6) agnd - 0.3 v ce?h? current i ceh v in =5.5v, v ce =5.5v, v out =0v -0.1 - 0.1 a ce?l? current i cel v in =5.5v, v ce =0v, v out =0v -0.1 - 0.1 a soft-start time t ss v ce =0v 5.0v, v out =v out(t) v 0.9 after "h" is fed to ce, the time by when clocks are generated at lx pin. 0.10 0.30 0.50 ms short protection threshold voltage v short sweeping v out , v out voltage which lx becomes ?l? level (*6) 0.17 0.27 0.37 v c l discharge r dchg v ce =0v, v out =4.0v 50 210 300 ? inductance l test freq.=1mhz - 1.0 - h - inductor rated current i dc ? t=+40deg - 0.55 - a - unless otherwise stated, v in =5.0v, v ce =5.0v, v out(t) =nominal voltage note: (*1) when the difference between the input and the output is small, 1 00% duty might come up and internal control circuits keep p-ch driver turning on even though the output current is not so large. if current is further pulled from this state, output vo ltage will decrease because of p-ch driver on resistance. (*2) including uvlo detect voltage, hysteresis operating voltage range for uvlo release voltage. (*3) r lxh =(v in - lx pin measurement voltage) / 100ma, r lxl =lx pin measurement voltage / 100ma (*4) design value for the XCL224 series (*5) current limit denotes the level of detection at peak of coil current. (*6) "h" = v in v in - 1.2v, "l"=- 0.1v + 0.1v
6/20 xcl223/XCL224 series electrical characteristics spec table (v out , t onmin ) nominal output voltage v out (v) t onmin (v) nominal output voltage v out (v) t onmin (v) f osc =3.0mhz f osc =3.0mhz

v out(t) (v) min. typ. max. v in (v) min. typ. max. v out(t) (v) min. typ. max. v in (v) min. typ. max. 0.80 0.784 0.800 0.816 2.50 77 128 179 2.25 2.205 2.250 2.295 3.75 140 200 260 0.85 0.833 0.850 0.867 2.50 78 130 182 2.30 2.254 2.300 2.346 3.83 140 200 260 0.90 0.882 0.900 0.918 2.50 79 132 185 2.35 2.303 2.350 2.397 3.92 140 200 260 0.95 0.931 0.950 0.969 2.50 80 133 186 2.40 2.352 2.400 2.448 4.00 140 200 260 1.00 0.980 1.000 1.020 2.50 93 133 173 2.45 2.401 2.450 2.499 4.08 140 200 260 1.05 1.029 1.050 1.071 2.50 98 140 182 2.50 2.450 2.500 2.550 4.17 140 200 260 1.10 1.078 1.100 1.122 2.50 103 147 191 2.55 2.499 2.550 2.601 4.25 140 200 260 1.15 1.127 1.150 1.173 2.50 107 153 199 2.60 2.548 2.600 2.652 4.33 140 200 260 1.20 1.176 1.200 1.224 2.50 112 160 208 2.65 2.597 2.650 2.703 4.42 140 200 260 1.25 1.225 1.250 1.275 2.50 117 167 217 2.70 2.646 2.700 2.754 4.50 140 200 260 1.30 1.274 1.300 1.326 2.50 121 173 225 2.75 2.695 2.750 2.805 4.58 140 200 260 1.35 1.323 1.350 1.377 2.50 126 180 234 2.80 2.744 2.800 2.856 4.67 140 200 260 1.40 1.372 1.400 1.428 2.50 131 187 243 2.85 2.793 2.850 2.907 4.75 140 200 260 1.45 1.421 1.450 1.479 2.50 135 193 251 2.90 2.842 2.900 2.958 4.83 140 200 260 1.50 1.470 1.500 1.530 2.50 140 200 260 2.95 2.891 2.950 3.009 4.92 140 200 260 1.55 1.519 1.550 1.581 2.58 140 200 260 3.00 2.940 3.000 3.060 5.00 140 200 260 1.60 1.568 1.600 1.632 2.67 140 200 260 3.05 2.989 3.050 3.111 5.08 140 200 260 1.65 1.617 1.650 1.683 2.75 140 200 260 3.10 3.038 3.100 3.162 5.17 140 200 260 1.70 1.666 1.700 1.734 2.83 140 200 260 3.15 3.087 3.150 3.213 5.25 140 200 260 1.75 1.715 1.750 1.785 2.92 140 200 260 3.20 3.136 3.200 3.264 5.33 140 200 260 1.80 1.764 1.800 1.836 3.00 140 200 260 3.25 3.185 3.250 3.315 5.42 140 200 260 1.85 1.813 1.850 1.887 3. 08 140 200 260 3.30 3.234 3. 300 3.366 5.50 140 200 260 1.90 1.862 1.900 1.938 3. 17 140 200 260 3.35 3.283 3. 350 3.417 5.50 142 203 264 1.95 1.911 1.950 1.989 3. 25 140 200 260 3.40 3.332 3. 400 3.468 5.50 144 206 268 2.00 1.960 2.000 2.040 3. 33 140 200 260 3.45 3.381 3. 450 3.519 5.50 146 209 272 2.05 2.009 2.050 2.091 3. 42 140 200 260 3.50 3.430 3. 500 3.570 5.50 148 212 276 2.10 2.058 2.100 2.142 3. 50 140 200 260 3.55 3.479 3. 550 3.621 5.50 151 215 280 2.15 2.107 2.150 2.193 3. 58 140 200 260 3.60 3.528 3. 600 3.672 5.50 153 218 284 2.20 2.156 2.200 2.244 3.67 140 200 260 typical circuit value product number c in 10v/4.7 f lmk1005bbj475mvlf (taiyoyuden) lmk107bj475ka(taiyoyuden) c1005x5r1a475m(tdk) c1608x5r1a475m(tdk) c l 10v/10 f lmk105cbj106mvlf(taiyoyuden) lmk107bbj106malt(taiyoyuden) c1608x5r1a106m(tdk) note: the integrated inductor can be used only for this dc/dc converter. please do not use this inductor for other reasons. v in pgnd agnd v out l1 l2 v in l x ce v ce v out c in cl * when under the condition of the voltage difference between input voltage and output voltage is low, please use 125 product, which has small capacity drop.
7/20 xcl223/XCL224 series test circuits l1 l2 pgnd v in lx v out ce agnd 1 f a < circuit no. > < circuit no. > < circuit no. > < circuit no. > < circuit no. > < circuit no. > l1 l2 v in lx v out ce agnd 1 f wave form measure point r pulldown 200 l1 l2 pgnd v in lx v out ce agnd 1 f v i lx l1 l2 pgnd v in lx v out ce agnd 1 f a a i ceh i cel i leakh l1 l2 pgnd v in lx v out ce agnd 1 f a i vout < circuit no. > l1 l2 pgnd v in lx v out ce agnd c in c l a v l wave form measure point external components c in :4.7 f(ceramic) c l :10 f(ceramic) l(a type) 0.47 h(selected inductor) l(b type) 1.0 h(selected inductor) r l r lxh =(v in -v l )/i lx r lxl =v lx /i lx l1 l2 pgnd v in lx v out ce agnd 1 f wave form measure point i limh v i leakl pgnd
8/20 xcl223/XCL224 series operational explanation the xcl223/XCL224 series consists of a reference voltage source, error amplifier, co mparator, phase compensation, minimum on time generation circuit, output voltage adjustment resistors, p-channel mos driv er transistor, n-channel mos switching transistor for the synchronous switch, current limiter circuit, uvlo circuit, thermal shutdown circuit, short protection circui t, pwm/pfm selection circuit and others. (see the block diagram below.) the method is hisat-cot (high speed circuit architecture for tr ansient with constant on time ) control, which features on time control method and a fast transient respons e that also achieves low output voltage ripple. the on time (t on ) is determined by the input voltage and output voltage, and turns on the pch mos driver tr. for a fixed time. during the off time (t off ), the voltage that is fed back thr ough r1 and r2 is compared to the reference voltage by the error amp, and the error amp output is phase compensat ed and sent to the comparator. the com parator compares this signal to the reference voltage, and if the signal is lower than the reference voltage, sets the sr la tch. on time then resumes. by doing thi s, pwm operation takes place with the off time controlled to the optimum duty ratio and the output voltage is stabilized. the phas e compensation circuit optimizes the frequency characteristics of t he error amp, and generates a ramp wave similar to the ripple voltage that occurs in the output to modul ate the output signal of the error amp. th is enables a stable feedback system to be obtained even when a low esr capacitor such as a ceramic capacit or is used, and a fast transient response and stabilization of the output voltage are achieved. generates an on time that depends on the input voltage and output voltage (t on ). the on time is set as given by the equations below. t on ( s) = v out / v in 0.333 the switching frequency can be obtained from the on time (t on ), which is determined by the in put voltage and output voltage, as given by the equation below. f osc = v out / (v in t on ) <100% duty cycle mode> when the load current is heavy and the volt age difference between input voltage and out put voltage is small, 100% duty cycle mode is activated and it keeps the pch mos driver tr. turning on. 100% duty cycle mo de attains a high output voltage stability and a high-speed response under all load conditions, from light to heavy, even in conditions where the dropout voltage is low. the error amp monitors the output voltage. the voltage divided by the internal r1 and r2 resistors is a feedback voltage for error amp. and compared to the referenc e voltage. the output voltag e of the error amp becomes higher when the feedback voltage is higher than the reference vo ltage. the frequency characteristics of t he error amp are optimized internally.
9/20 xcl223/XCL224 series operational explanation (continued) the current limiter circuit of the xcl2 23/XCL224 series monitors the current fl owing through the p-channel mos driver transistor connected to the lx pin. when the driver current is greater than a specific level, the current limit function operat es to turn off the pulses from the lx pin at any given timing. when t he over current state is elimi nated, the ic resumes its normal operation. the reference voltage forms a reference that is used to stabiliz e the output voltage of the ic. after chip enable of the ic, th e reference voltage connected to the error amp incr eases linearly during the soft-start interval. this allows the voltage divided by the internal r1 and r2 re sistors and the reference voltage to be controlled in a balanced manner, and the output voltage rises in proportion to the rise in the reference voltage. this operation prevents rush input cur rent and enables the output voltage to rise smoothly. if the output voltage does not reach the set ou tput voltage within the soft start time, su ch as when the load is heavy or a lar ge capacity output capacitor is connected, t he balancing of the voltage divided by t he internal resistors r1 and r2 and the reference voltage is lost, however, the cu rrent restriction function activates to prev ent an excessive increase of input curren t, enabling a smooth rise of the output voltage. pwm control is a continuous conduction mode, and operates at a stable switching frequency by means of an on time (t on ) that is determined by the input voltage and output voltage regardless of the load. pwm/pfm auto switching control is a discontinuous conduction mode at light loads, and lowers the switching frequency to reduce switching loss and improve efficiency. the xcl223 series is internally fixed to pwm control. the XCL224 series is internally fixed to pwm/pfm auto switching control. operation starts when ?h? voltage is input in to the ce pin. the ic can be put in t he shutdown state by inputting ?l? voltage in to the ce pin. in the shutdown state, the supply current of the ic is 0 a (typ.), and the pch mos driv er tr. and nch mos switch tr. for synchronous rectification turn off. the ce pin is a cmos input and the sink current is 0 a. when the v in voltage becomes 2.00v (typ.) or lower, the p-ch mos driver transistor output driver transistor is forced off to prevent false pulse output caused by unstable oper ation of the internal circuitry. when the v in pin voltage becomes 2.10v (typ.) or higher, switching operation takes place. by releasi ng the uvlo function, the ic performs the soft start function to initiate output startup operat ion. the uvlo circuit does not cause a complete s hutdown of the ic, but causes pulse output to be suspended; therefore, the internal circuitry remains in operation . for protection against heat damage of the ic s, thermal shutdown function monitors chip temperature. the thermal shutdown circuit starts operating and the p-ch mos driver and n-ch mos driver transistor will be turned off when the chip?s temperature reaches 150 . when the temperature drops to 120 (typ.) or less after shutting of the cu rrent flow, the ic performs the soft- start function to initiate output startup operation. the short-circuit protection circuit prot ects the device that is connected to th is product and to the input/output in situations such as when the output is accidentally shorted to gnd. the short-circuit protection circuit monitors the output voltage, and when the output voltage falls below the short-circuit protection th reshold voltage, it turns off the pch mos drive r tr and latches it. once in the latched state, op eration is resumed by turning off the ic from the ce pin and then restarting, or b y re- input into the v in pin.
10/20 xcl223/XCL224 series operational explanation (continued) the product can quickly discharge the elec tric charge at the output capacitor (c l ) when a low signal to the ce pin which enables a whole ic circuit put into off state, is inputt ed via the n-ch mos switch transistor located between the v out pin and the gnd pin. when the ic is disabled, el ectric charge at the output capacitor (c l ) is quickly discharged so that it may avoid application malfunction. v=v out(t) e - t / t = ln (v out(t) / v) v : output voltage after discharge v out(t) : output voltage t : discharge time : c l r dchg c l : capacitance of output capacitor r dchg : c l auto-discharge resistance, but it depends on supply voltage. note on use 1. for the phenomenon of temporal and transitional volta ge decrease or voltage increase, the ic may be damaged or deteriorated if ic is used beyond t he absolute max. specifications. 2. spike noise and ripple voltage arise in a switching regulator as with a dc/dc converter. these are greatly influenced by external component selection, such as the coil inductance, capacitance values, and board layout of external components. once the design has been completed, verification with actual components should be done. 3. the dc/dc converter characteristics depend greatly on the externally connected components as well as on the characteristics of this ic, so refer to the specifications a nd standard circuit examples of each component when carefully considering which components to select. be especially careful of the capacitor characteristics and use b characteristics (jis standard) or x7r, x5r (eia standard) ceramic capacitors. 4. sufficiently reinforce the ground wiring. in particular, rein force near the pgnd and agnd pin as fluctuations of the ground phase due to the ground current during switching may cause the operation of the ic to become unstable. 5. mount external components as close as possible to the ic. keep the wiring short and thick to lower the wiring impedance. 6. a feature of hisat-cot contro l is that it controls the off time in order to control the duty, which varies due to the effect s of power loss between the input (v in pin) and output (v out pin) due to the load, and thus the switching frequency fluctuates. in addition, changes in the on time due to 100% duty cycle mode ar e allowed. for this reason, c aution must be exercised as the characteristics of the switching frequency will vary depending on the external component charac teristics, board layout, input voltage, output voltage, load cu rrent and other parameters. 7. due to propagation delay inside the product, the on time gener ated by the minimum on time generation circuit may not be the same as the on time that is the ratio of the input voltage to the output voltage. 8. with regard to the current limiting value, the actual coil cu rrent may at times exceed the electrical characteristics due to propagation delay inside the product. 9. the ce pin is a cmos input pin. do not use with the pin open. if connecting to the input or ground, use a resistor up to 1m ? . to prevent malfunctioning of the device co nnected to this product or the input/outpu t due to short circuiting between pins, it is recommended that a resistor be connected. 10. if the output voltage drops below the short circuit protecti on threshold voltage at the end of the soft start interval, ope ration will stop. 11. pwm/pfm auto switching control is a di scontinuous conduction mode when the load is light, and in cases where the voltage difference between input and output is low or the coil inductance is higher than the value indi cated in the standard circuit example, the coil current may reverse when the load is li ght, and thus pulse skipping will not be possible and light load efficiency will worsen. 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 2 4 6 8 1012 1416 1820 discharge time: t(ms) output voltage: v out (v) vout=1.2v vout=1.8v vout=3.3v output voltage dischage characteristics r dchg =210 ? (typ.) c l =10 f
11/20 xcl223/XCL224 series note on use (continued) 12. when the voltage difference between input voltage and output voltage is low, the load stability feature may deteriorate. 13. torex places an importance on improvin g our products and their reliability.we re quest that users incorporate fail-safe designs and post-aging protecti on treatment when using torex products in their systems. 14. instructions of pattern layouts the operation may become unstable due to noise and/or p hase lag from the output current when the wire impedance is high,please place the input capacitor(c in ) and the output capacitor (c l ) as close to the ic as possible. (1) in order to stabilize v in voltage level, we recommend that a by-pass capacitor (c in ) is connected as close as possible to the v in pin, pgnd pin and agnd 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 connecting traces to reduce the circuit impedance. (4) make sure that the gnd 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) this series? internal driver transistors bring on heat becau se of the output current and on resistance of p-channel and n- channel mos driver transistors. please consider the countermeasures against heat if necessary. (6) in the following reference pattern layout drawing, the 2- pin nc terminal is open, but it is not connected to the ic chip.therefore, there is no problem with conn ecting it to a 1-pin (vin) or 2-pin (lx).
12/20 xcl223/XCL224 series 3.1 3.2 3.3 3.4 3.5 0.1 1 10 100 1000 output voltage : v out [v] output current : i out [ma] vin=5.0v 1.6 1.7 1.8 1.9 2.0 0.1 1 10 100 1000 output voltage : v out [v] output current : i out [ma] vin=3.3v vin=5.0v 1.6 1.7 1.8 1.9 2.0 0.1 1 10 100 1000 output voltage : v out [v] output current : i out [ma] vin=3.3v vin=5.0v 3.1 3.2 3.3 3.4 3.5 0.1 1 10 100 1000 output voltage : v out [v] output current : i out [ma] vin=5.0v 1.6 1.7 1.8 1.9 2.0 0.1 1 10 100 1000 output voltage : v out [v] output current : i out [ma] vin=3.3v vin=5.0v 1.6 1.7 1.8 1.9 2.0 0.1 1 10 100 1000 output voltage : v out [v] output current : i out [ma] vin=3.3v vin=5.0v typical performance characteristics (1) output voltage vs. output current xcl223a183d2 (pwm mode, vout=1.8v) XCL224a183d2 (pwm/pfm mode, vout=1.8v) xcl223a333d2 (pwm mode, vout=3.3v) XCL224a333d2 (pwm/pfm mode, vout=3.3v) xcl223b183d2 (pwm mode, vout=1.8v) XCL224b183d2 (pwm/pfm mode, vout=1.8v)
13/20 xcl223/XCL224 series 0 20 40 60 80 100 0.1 1 10 100 1000 efficiency : effi [%] output current : i out [ma] vin=5.0v 0 20 40 60 80 100 0.1 1 10 100 1000 efficiency : effi [%] output current : i out [ma] vin=5.0v 0 20 40 60 80 100 0.1 1 10 100 1000 efficiency : effi [%] output current : i out [ma] vin=3.3v vin=5.0v 0 20 40 60 80 100 0.1 1 10 100 1000 efficiency : effi [%] output current : i out [ma] vin=3.3v vin=5.0v 3.1 3.2 3.3 3.4 3.5 0.1 1 10 100 1000 output voltage : v out [v] output current : i out [ma] vin=5.0v 3.1 3.2 3.3 3.4 3.5 0.1 1 10 100 1000 output voltage : v out [v] output current : i out [ma] vin=5.0v typical performance characteristics (continued) (1) output voltage vs. out put current (continued) (2) efficiency vs. output current XCL224a183d2 (pwm/pfm mode, vout=1.8v) xcl223a183d2 (pwm mode, vout=1.8v) xcl223b333d2 (pwm mode, vout=3.3v) XCL224b333d2 (pwm/pfm mode, vout=3.3v) XCL224a333d2 (pwm/pfm mode, vout=3.3v) xcl223a333d2 (pwm mode, vout=3.3v)
14/20 xcl223/XCL224 series 0 20 40 60 80 100 0.1 1 10 100 1000 ripple voltage : vr [mv] output current : i out [ma] vin=3.3v vin=5.0v 0 20 40 60 80 100 0.1 1 10 100 1000 ripple voltage : vr [mv] output current : i out [ma] vin=3.3v vin=5.0v 0 20 40 60 80 100 0.1 1 10 100 1000 efficiency : effi [%] output current : i out [ma] vin=3.3v vin=5.0v 0 20 40 60 80 100 0.1 1 10 100 1000 efficiency : effi [%] output current : i out [ma] vin=3.3v vin=5.0v 0 20 40 60 80 100 0.1 1 10 100 1000 efficiency : effi [%] output current : i out [ma] vin=5.0v 0 20 40 60 80 100 0.1 1 10 100 1000 efficiency : effi [%] output current : i out [ma] vin=5.0v typical performance characteristics (continued) (2) efficiency vs. output current (continued) (3) ripple voltage vs. output current xcl223b183d2 (pwm mode, vout=1.8v) XCL224b183d2 (pwm/pfm mode, vout=1.8v) xcl223b333d2 (pwm mode, vout=3.3v) XCL224b333d2 (pwm/pfm mode, vout=3.3v) xcl223a183d2 (pwm mode, vout=1.8v) XCL224a183d2 (pwm/pfm mode, vout=1.8v)
15/20 xcl223/XCL224 series 3.1 3.2 3.3 3.4 3.5 -50-25 0 255075100125 output voltage : v out (v) ambient temperature : ta ( ) vin=5.0v i out =100ma 3.1 3.2 3.3 3.4 3.5 -50 -25 0 25 50 75 100 125 output voltage : v out (v) ambient temperature : ta ( ) vin=5.0v i out =100ma 1.6 1.7 1.8 1.9 2.0 -50-25 0 255075100125 output voltage : v out (v) ambient temperature : ta ( ) vin=3.3v vin=5.0v i out =100ma 1.6 1.7 1.8 1.9 2.0 -50 -25 0 25 50 75 100 125 output voltage : v out (v) ambient temperature : ta ( ) vin=3.3v vin=5.0v i out =100ma 0 20 40 60 80 100 0.1 1 10 100 1000 ripple voltage : vr [mv] output current : i out [ma] vin=5.0v 0 20 40 60 80 100 0.1 1 10 100 1000 ripple voltage : vr [mv] output current : i out [ma] vin=5.0v typical performance characteristics (continued) (3) ripple voltage vs. output current (continued) (4) output voltage vs. ambient temperature xcl223a333d2 (pwm mode, vout=3.3v) XCL224a333d2 (pwm/pfm mode, vout=3.3v) xcl223a183d2 (pwm mode, vout=1.8v) XCL224a183d2 (pwm/pfm mode, vout=1.8v) xcl223a333d2 (pwm mode, vout=3.3v) XCL224a333d2 (pwm/pfm mode, vout=3.3v)
16/20 xcl223/XCL224 series 2.0 2.5 3.0 3.5 4.0 -50 -25 0 25 50 75 100 125 oscillation frequency : fosc (mhz) ambient temperature : ta ( ) vin=3.3v vin=5.0v i out =100ma 2.0 2.5 3.0 3.5 4.0 -50 -25 0 25 50 75 100 125 oscillation frequency : fosc (mhz) ambient temperature : ta ( ) vin=3.3v vin=5.0v i out =0ma typical performance characteristics (continued) (5) oscillation frequency vs. ambient temperature (6) load transient response xcl223a183d2 (pwm mode, vout=1.8v) xcl223a183d2 (pwm mode, vout=1.8v) 1) xcl223a183d2 (pwm mode, vin=5.0v, vout=1.8v) iout=1ma ? 400ma 2) XCL224a183d2 (pwm/pfm mode, vin=5.0v, vout=1.8v) iout=1ma ? 400ma
17/20 xcl223/XCL224 series packaging information usp-8b04 (unit: mm) usp-8b04 reference pattern layout / reference metal mask design (unit: mm) 0.15 0.7 0.34 0.22 0.11 0.85 0.21 1pin indent 1.500.05 2.250.05 0.75 max 0.75 max 6 4 5 8 7 3 2 1 0.500.05 (0.30) 0.500.05 (0.075) 0.700.05 (0.34) (0.22) 0.210.05 (0.065) (0.04) 0.600.05 (0.22) (0.43) (0.43)
18/20 xcl223/XCL224 series packaging information(continued)
19/20 xcl223/XCL224 series 1234 5678 1 2 34 5 6 78 marking rule usp-8b04 ,,, represents products series represents integer and oscillation frequency of the output voltage represents decimal number of the reference 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) * no character inversion used. symbol product series l 2 2 3 xcl223******-g l 2 2 4 XCL224******-g symbol type output voltage(v) product series a a 0.x xcl22*a0****-g b 1.x xcl22*a1****-g c 2.x xcl22*a2****-g d 3.x xcl22*a3****-g e b 0.x xcl22*b0****-g f 1.x xcl22*b1****-g h 2.x xcl22*b2****-g k 3.x xcl22*b3****-g output voltage(v) mark product series x.0 0 xcl22***0***-g x.05 a xcl22***a***-g x.1 1 xcl22***1***-g x.15 b xcl22***b***-g x.2 2 xcl22***2***-g x.25 c xcl22***c***-g x.3 3 xcl22***3***-g x.35 d xcl22***d***-g x.4 4 xcl22***4***-g x.45 e xcl22***e***-g x.5 5 xcl22***5***-g x.55 f xcl22***f***-g x.6 6 xcl22***6***-g x.65 h xcl22***h***-g x.7 7 xcl22***7***-g x.75 k xcl22***k***-g x.8 8 xcl22***8***-g x.85 l xcl22***l***-g x.9 9 xcl22***9***-g x.95 m xcl22***m***-g
20/20 xcl223/XCL224 series 1. the product and product specific ations contained herein are subj ect 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 an d characteristics of our products. we neither make warranties or repres entations with respect to the accuracy or completeness of the information contained in this datasheet nor grant 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 regulati ons 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 fo r use in equipment of systems which require extremely high levels of quality an d/or reliability and/or a malfunc tion 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) aeros pace industry, 3) medical 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 use unless agreed by us in writing in advance. 5. although we make continuous efforts to impr ove the quality and reliability of our products; nevertheless semiconductors are likely to fail with a certain probability. so in order to prevent personal injury and/or property damage resulting from such failure, customers are required to incorporate adequate safety measures in their de signs, 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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