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1/22 XC9220/xc9221 series 16v input voltage, step-down dc/dc controller ics. general description the XC9220/xc9221 series is a group of multi-purpose step-down dc/dc controller ics. the ics enable a high efficiency, stable power supply with an output current up to 3a to be conf igured using only a transistor, a coil, a diode, and two capacito rs connected externally. low esr capacitors such as a ceramic capacitor can be used as an output capacitor. the XC9220/xc9221 series has a 0.9v (1.5%) reference voltag e, and using externally con nected resistors, the output voltage can be set freely. with an internal switching freq uency of 300khz and 500khz 1.0mhz, small external components can also be used. the XC9220 series is pwm control, and the xc9221 series is pwm/pfm mode, which automatically switches from pwm to pfm during light loads and high efficiencie s can be achieved over a wide range of load conditions. ? as for the soft-start time, the XC9220/xc9221a and c series is internally set to 4msec and the XC9220/xc9221b and d series can be externally set-up. ? with the built-in u.v.l.o. (under voltage lock ou t) function, the inter nal p-channel driver transistor is forced off when input voltage becomes 2.3v or lower. typical application circuit applications ? set top boxes ? digital tvs ? dvd/hdd recorders ? portable information terminals ? notebook computers features operating voltage range : 2.8v ~ 16.0v output voltage range : 1.2v or more output voltage externally set : 0.9v (accuracy + 1.5%) output current : less than 3.0a oscillation frequency : 300khz, 500khz, and 1.0mhz control methods : pwm control (XC9220) pwm/pfm automatic switching (xc9221) soft-start function : 4ms, internally set (XC9220/xc9221a, 500khz) externally set (XC9220/xc9221b) protection circuits : integral protection (1.0 ms) (XC9220/xc9221 aand b series) short-circuit protection low esr capacitor compatible : ceramic capacitor packages : sot-25 usp-6c typical performance characteristics ? efficiency vs. output current 1 2 3 5 4 ce gnd fb v in ext c in v in cl r fb1 r fb2 c fb l sbd pc h mosfet v out ce rsense ( for ceramic cl ) * rsense : tantalum and electrolytic capacitors can be used, in w hich case, rsense becomes unnecessary. 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 1000 10000 output current io ut (m a) efficiency effi (%) vin=5.0v vin=12.0v vin=16.0v xc9221a095mr (vout=3.3v, fosc=500khz) cin=47 f (os-con), cl=47 f (os-con), l=10 h (cdrh8d43, sumida) pchmosfet: cph3308 (sanyo), cdd=1.0 f (ceramic), rin=10
etr0511_007
2/22 XC9220 / xc9221 series ? ? pin number sot-25 usp-6c pin name function 1 6 ce/c ss chip enable / soft-start 2 5 v ss ground 3 4 fb output voltage sense 4 3 ext/ external transistor drive - 2 nc no connection 5 1 v in power supply designator description symbol description a : soft-start internally set with integral protection function b : soft-start externally set with integral protection function c : soft-start internally set without integral protection function 1 type of dc/dc controller ics d : soft-start externally set without integral protection function 23 output voltage 09 : fb voltage (fixed) 3 : 300khz 5 : 500khz 4 oscillation frequency a : 1.0mhz m : sot-25 5 package e : usp-6c r : embossed tape, standard feed 6 device orientation l : embossed tape, reverse feed pin configuration sot-25 (top view) usp-6c (bottom view) pin assignment product classification ? ordering information XC9220 123456 : pwm control xc9221 123456 : pwm/pfm automatic switching control * the dissipation pad for the usp-6c package (preliminary) should be solder-plated in recommended mount pattern and metal masking so as to enhance mounting strength and heat release. if the pad needs to be connected to other pins, it should be connected to the v ss (no.5) pin. 1 2 3 5 4 ce/c ss v ss fb ext/ v in
3/22 XC9220/xc9221 series ? XC9220/21a and c series ?????????? XC9220/21b and d series parameter symbol ratings units v in pin voltage v in - 0.3 ~ + 18.0 v fb pin voltage v fb - 0.3 ~ v in + 0.3 v ce/c ss pin voltage ce - 0.3 ~ v in + 0.3 v ext/ pin voltage v ext - 0.3 ~ v in + 0.3 v ext/ pin current i ext + 100 ma sot-25 250 power dissipation usp-6c pd 100 mw operating temperature range topr - 40 ~ + 85 o c storage temperature range tstg - 55 ~ +125 o c ? a bsolute maximum ratings ta = 2 5 o c block diagrams
4/22 XC9220 / xc9221 series unless otherwise stated, v in =5.0v note: *1: effi = { (output voltage) x (output current)} / { (input voltage) x (input current) } x 100 *2: no integral protection function is available with the XC9220/9221 c series. ** refer to the characteristics chart by oscillation frequency. parameter symbol conditions min. typ. max. unit. circuit fb voltage v fb 0.8865 0.9000 0.9135 v 2 input voltage range v in 2.8 - 16.0 v - u.v.l.o. voltage (minimum operating voltage) v uvlo 1.9 2.3 2.7 v 3 supply current 2 i dd2 v in =5.0v, fb=1.0v ** a 1 stand-by current i stb - 0.1 1.0 a 1 oscillation frequency f osc connected to external components ** khz 3 maximum duty ratio maxdty 100 - - % 2 pfm duty ratio pfmdty no load (xc9221 series only) 15 25 35 % 3 ext/ high on resistance rextbh 6 10 16 4 ext/ low on resistance rextbl 6 12 20 4 integral protection time (*2) t pro (XC9220/9221 a series) ** ms 2 short-circuit protection v short - - 0.7 v 2 soft-start time t ss ** ms 2 efficiency (*1) effi - 92 - % 3 u v fb fb voltage temperature characteristics u topr ? v fb - + 100 - ppm / o c 2 ce ?high? level voltage v ceh 1.2 - - v 2 ce ?low? level voltage v cel - - 0.3 v 3 ce ?high? level current i ceh v in =ce=16v - 0.1 - 0.1 a 1 ce ?low? level current i cel v in =16v, ce=0v - 0.1 - 0.1 a 1 fb ?high? level current i fbh v in =fb=16v - 0.1 - 0.1 a 4 fb ?low? level current i fbl v in =16v, fb=0v - 0.1 - 0.1 a 4 electrical characteristics XC9220/xc9221 a and c series ta = 2 5 o c
5/22 XC9220/xc9221 series unless otherwise stated, v in =5.0v external components: c ss =0.1 f, r ss =200k note: *1: internal soft-start time: in case where the u.v.l.o. function operates temporarily due to the power cutoff etc. when an ex ternal c ss is charged (v ce > 2.6v), the ic restarts operation by the internal soft-start time . minimum value of soft-start time set externally is equal to the internal soft-start time. *2: effi={ (output voltage) x (output current) } / { (input voltage) x (input current) } x 100 *3: the integral latch and short-circuit protection do not function when the ce/c ss pin voltage become lower than 2.6v while the soft-start time. *4: no integral protection function is available with the XC9220/xc9221 d series. ** refer to the characteristics chart by oscillation frequency. 300khz 500khz 1.0mhz parameter symbol min. typ. max. min. typ. max. min. typ. max. supply voltage 2 i dd2 - 25 50 - 25 50 - 40 80 oscillation frequency fosc 255 300 345 425 500 575 850 1000 1150 integral protection time tpro 0. 5 1.0 2.0 0.5 1.0 2.0 0.25 0.50 1.00 soft-start time t ss 2 4 8 2 4 8 1 2 4 parameter symbol conditions min. typ. max. unit. circuit fb voltage v fb 0.8865 0.9000 0.9135 v 2 input voltage range v in 2.8 - 16.0 v - u.v.l.o. voltage (minimum operating voltage) v uvlo 1.9 2.3 2.7 v 3 supply current 2 i dd2 v in =5.0v, fb=1.0v ** a 1 stand-by current i stb - 0.1 1.0 a 1 oscillation frequency f osc connected to external components ** khz 3 maximum duty ratio maxdty 100 - - % 2 pfm duty ratio pfmdty no load (xc9221 series only) 15 25 35 % 3 ext/ high on resistance rextbh 6 10 16 4 ext/ low on resistance rextbl 6 12 20 4 integral protection time (*4) t pro (XC9220/9221 b series) ** ms 2 short-circuit protection v short - - 0.7 v 2 soft-start time t ss connected to r ss and c ss 5.0 10.0 20.0 ms 5 internal soft-start time (*1) t ss_in ce=v in ** ms 2 efficiency (*2) effi - 92 - % 3 u v fb fb voltage temperature characteristics u topr ? v fb - + 100 - ppm / o c 2 ce ?high? level voltage (*3) v ceh 2.6 - - v 2 ce ?low? level voltage v cel - - 0.3 v 2 ce ?high? level current i ceh v in =ce=16v - 0.1 - 0.1 a 1 ce ?low? level current i cel v in =16v, ce=0v - 0.1 - 0.1 a 1 fb ?high? level current i fbh v in =fb=16v - 0.1 - 0.1 a 4 fb ?low? level current i fbl v in =16v, fb=0v - 0.1 - 0.1 a 4 XC9220/xc9221 b and d series electrical characteristics (continued) ta = 2 5 o c characteristics chart by oscillation frequecy
6/22 XC9220 / xc9221 series typical application circuits external components pch mosfet: 2sj646 (sanyo) sbd: de5pc3 (shindengen) l: cdrh8d28-4r7 (4.7 h, sumida / fosc=1.0mhz) cdrh8d43-100 (10 h, sumida / fosc=500khz) cdrh127-220 (22 h, sumida / fosc=300khz) cin: 47 f (os-con, sanyo) cl: 47 f (os-con, sanyo) operational explanation the XC9220/xc9221 series consists of a reference voltage s ource, ramp wave circuit, erro r amplifier, pwm comparator, phase compensation circuit, protection circuits, u.v.l.o. circui t and others. the series ic s compare, using the error amplifier, the voltage of the internal voltage refe rence source with the feedback voltage from the v out pin through split resistors. phase compensation is performed on the resultin g error amplifier output, to input a signal to the pwm comparator to determine the turn-on time during pwm operati on. the pwm comparator compares, in terms of voltage level, the signal from the error amplifier with the ramp wave from the ramp wave circuit, and delivers the resulting output to the buffer driver circuit to cause the ext pin to output a sw itching duty cycle. this process is continuously performed to ensure stable output voltage. the reference voltage source provides the reference voltage to ensure stable output volt age of the dc/dc converter. the oscillator determines switching frequency. the frequenc y is fixed internally and can be selected from 300khz, 500khz and 1.0mhz. clock pulses generated in this circui t are used to produce ramp waveforms needed for pwm operation, and to synchronize all the internal circuits. the error amplifier is designed to monitor output voltage. the amplifier compares the reference voltage with the feedback voltage (fb pin voltage) divided by the internal split resistors. when a voltage lower than the reference voltage is fed back, the output voltage of the error amplifier increases. the gai n and frequency characteristics of the error amplifier output are fixed internally to de liver an optimized signal to the pwm comparator. the XC9220 series is pwm control, and the xc9221 series is pwm/pfm automatic switch ing mode. in the XC9220 series, it is controlled at a constant fr equency from light load to heavy load. when a noise etc. is conc erned, it is easy to set up a filter etc. since the frequency is fixed. on the other hand, the effici ency at the time of light load may fall. in the xc9221 series, the high efficiency can be drawn from pfm control at the time of light load. in pwm/pfm automatic switching mode, a control meth od is automatically changed from pwm c ontrol to pfm control at the time of light load. if coil current becomes discont inuous at the time of light load, on time duty intends to reduce less than 25%. therefore, the pfm circuit operates to output the pulse, which on time duty fixed to 25% from the ext/pin. the on time duty is fixed when pfm operation. the pulse is outpu tted with the cycle suitable for the conditions at that time. in order that the number of times of switching per uni t time may decrease, the efficienc y, which it is at the light load time is improved. however, output cycle of the puls e cannot be fixed. for this, the circuit should be designed with this point in mind when using a noise filter etc. t he conditions shifting to the pfm operation is depend on values of input voltage, load current, coil and so on.
7/22 XC9220/xc9221 series the XC9220/xc9221b and d series can adjust the soft-start time externally via the ce pin. the soft-start function operates until the ce pin voltage becomes 2.6v. please refer to the followi ng equation for calculating the soft-start time. minimum soft-start time is equ al to the time se t internally. t ss = - c ss x r ss x in { (v ce ? 2.2) / v ce } ce/css pin vce rss css ce/css pin vce rss css on/off signal > circuit examle2 : cmos logic (low current dissipation) ce/css pin vce rss css on/off signal > cicuit examle3 : cmos logic (low current dissipation, quick off) > circuit example1 : n-ch open drain ce/css pin vce rss css on/off signal internal sotf-start time:tss1 (XC9220/21a series) externally set soft-start time: tss2 (XC9220/21a series) minimum soft-start time when externally set: tss2_min = tss1 XC9220/21a series XC9220/21b series when the input voltage becomes 2.3v (typ .) or lower, the external p-channel driver transistor is forced off. once the u.v.l.o. operates, the XC9220/xc9221a and c se ries (soft-start internally set type ) resets the internal circuit. for this, by releasing the u.v.l.o. function, the ic performs the soft-start function to initiate output startup operation. when the input voltage falls because of a power cutoff etc. and the ic stops operat ion due to the u.v.l.o. function, the ic resumes its operation by internal soft-start circuit of t he XC9220/xc9221b and d series. if the soft-start time is needed to set externally, the ce/c ss pin voltage should be reset to 0v. (pl ease see the soft-start circuit example.) ? u.v.l.o. operation vin u.v.l.o. (internal signal) vout (XC9220/21a and c series) vout (XC9220/21b and d series) u.v .l.o. release delay soft-start time: tss1 u.v.l.o. operation u.v .l.o. release delay soft-start time (externally set-up) :tss2 soft-start time:tss1 operational explanation ( continued )
8/22 XC9220 / xc9221 series 2. short-circuit protecti on circuit (latching type) when the fb pin is shorted to the ground or the output voltage drops rapidly becaus e of over load state etc., the p-ch driver transistor is kept off as in the case with the integral protection circui t. (the protection circuit operates when the fb voltage becomes 0.7v or lower.) for releasing the latching state, the circuit is needed to restart via the v in and the ce pin. z short-circuit protection circuit fb voltage 0.9v 0.7v vref 0.9v soft-start time tss x 90% * protection circuit does not operate. less than 100usec = not latching latch 100 usec * about 100 to 200usec delay time is set to avoid latching w hen instantaneous transient response drop 1. integral protection circuit (latch type) in the circuit of the XC9220/xc9221 a and b series, the more load current becomes larger, the duty of the ext/ pin gradually expands, and the duty reaches maximum (ext/l). when the maxduty state c ontinues a certain amount of time (t pro ), the ext/ pin holds high level (latching) and keeps the p-ch output driver transistor in off state. for resuming the operation from the latching state, please turn off the ic via the ce pin or apply the input voltage again (operates u.v.l.o. function a nd release). the latching state does not m ean a complete shutdown, but a state in which pulse output is suspend ed; therefore, the internal ci rcuitry remains in operation. however, the integral protection circuit uses the maxduty as a trigger for its operation, it suspe nds the pulse output no matter what dropout voltage decreases. for the s pecification including small dropout voltage, the XC9220/xc9221 c or d series, which do not have the integral protection function, are recommended. z integral protection circuit ton < tpro ton > tpro ext/ waveform latch protection circuit operates and ext/ output shut dow n ton : on time ( ext/ : l) tpro : integral protection circuit delay time (internally set) operational explanation ( continued )
9/22 XC9220/xc9221 series ? output voltage setting output voltage can be set by adding split resistors. out put voltage is determined by the following equation, based on the values of r fb1 and r fb2 . the sum of r fb1 and r fb2 should normally be 1m
or less. v out = 0.9 x (r fb1 + r fb2 ) / r fb2 the value of c fb , speed-up capacitor for phase compensation, should be adjusted by the following equation. fzfb should usually be 5khz. adjustments are required from 1khz to 20khz depending on the application, value of inductance (l), and value of load capacity (cl). c fb = 1 / (2 x x r fb1 x fzfb) [ sample calculation: setting 3.3v v out ] r fb1 = 200k
, r fb2 =75k
, v out = 0.9 x (200k + 75k) / 75k = 3.300v c fb = 1 / (2 x x 200k x 5k) =150pf [typical examples] v out (v) r fb1 (k
) r fb2 (k
) c fb (pf) v out (v) r fb1 (k
) r fb2 (k
) c fb (pf) 1.2 100 300 330 3.3 200 75 150 1.5 180 270 180 5.0 150 33 220 1.8 220 220 150 12.0 160 13 180 i out up to 500ma up to 1a up to 2a up to 3a p-ch mosfet (*1) cph3308 (sanyo) 2sj616 (sanyo) 2sj646 (sanyo) schottky barrier diode (sbd) (*2) xb01sb04a2br (torex) d1fh3 (shindengen) cms02 (toshiba) de5pc3 (shindengen) *1: recommended to use p-ch mosfet with ciss less than 1500pf. *2: sbd should be used with high-toned reverse characteristics. output voltage rsense (m
) v out ? 2.5v 100 v out >2.5v 50 ? recommended mosfet and sbd (examples) ? ceramic capacitor with the XC9220/9221 series, a ceramic capacitor c an be used as an output capacitor (cl). rsense resistor is required for using the ceramic capacitor. the value of rsense resistor is determined depending on the setting output voltage as the chart below. ? external components ? p-ch mosfet: 2sj646 (sanyo) sbd: de5pc3 (shindengen) l: cdrh8d28-4r7 (4.7 h, sumida / fosc=1.0mhz) cdrh8d43-100 (10 h, sumida / fosc=500khz) cdrh127-220 (22 h, sumida / fosc=300khz) cin: 22 f (ceramic) cl: 22 f (ceramic / fosc=1.0mhz, 500khz) 47 f (ceramic / fosc=300khz) rsense: 100m ? (v out ? 2.5v) 50m ? (v out ? 2.5v) operational explanation ( continued )
10/22 XC9220 / xc9221 series fosc (khz) l ( h) 300 22.0 500 10.0 1000 4.7 operational explanation ( continued ) ? setting of coil value recommended inductance value of coil by oscillation frequency is shown in the chart below. however, the more current change in each pulse becomes larger, the more output ripple voltage becomes higher when dropout voltage is high. this may lead to instability. in this case, increasing the coil inductance value will make ipk_ac small, and it makes output stable. ipk_ac = (v in ? v out ) x v out / (v in x l x fosc) l: coil inductance value fosc: oscillation frequency please do not exceed the coil rating. coil peak current is determined by the following equation. ipk = i out + ipk_ac / 2
11/22 XC9220/xc9221 series notes on use 1. the XC9220/xc9221 series are designed for use with an output ceramic capacitor. if, however, the potential difference between input and output is too large, a ceramic capacitor may fail to absorb the resulting high switching energy and oscillation could occur on the output. if the input -output potential difference is large, connect the output capacitor with large performance to compensate for insufficient capacitance. 2. spike noise and ripple voltage arise in a switching regulato r as with a dc/dc converter. these are greatly influenced by external component selection, such as the coil induct ance, capacitance values, and board layout of the external components. once the design has been completed, verification with actual components should be done. 3. when the difference between input voltage and output voltage is large in pwm control, and the load current is light, very narrow pulses will be outputted, and there is the possibility that some cycles my be skipped completely. 4. when the difference between input voltage and output voltage is small in pwm cont rol, and the load current is heavy, very wide pulses will be outputted and there is the po ssibility that some cycles my be skipped completely. 5. when using the ce pin by pulling up to the v in pin, please be noted to the rising time of the v in pin voltage. if the rising time of the v in pin voltage is much slower than the soft -start time of the XC9220/xc9221 series, the short-protection circuit starts to operate so that the output may not rise. if you are using the a or the c series, please use a voltage detector or something similar in order to check that the input voltage rises full y. then, start the series via the ce pin. if you don?t want to use an additional detector in this way, we recommend that you use the b or d series, adjusting the soft-start period external ly so that the voltage at the v in pin rises fully before the soft-start period is completed. 6. use of the ic at voltages below the recommended minimum operating voltage may lead to instability. 7. this ic and external components should be used within the stated absolute maximum ratings in order to prevent damage to the device.
12/22 XC9220 / xc9221 series ? notes on use (continued) ? instructions on pattern layout 1. wire external components as close to the ic as pos sible and use thick, short connecting traces to reduce the circuit impedance. 2. please strengthen v in and v ss wiring in particular. switching noise which occurs from the gnd may cause the instability of the ic. the ic can maintain stable operations with r in (about 10
) and c dd (about 1 f) connected to the v in pin. [board layout when XC9220/xc9221 series is mounted with external components] [pc board for the XC9220/xc9221 series] ceramic capacito r schottky barrier diode inducto r resisto r low value resisto r
13/22 XC9220/xc9221 series test circuits circuit 1: supply current, stand-by current, ce current circuit 2: fb voltage, integr al protection, short-circuit, soft-start, maxduty, ce voltage circuit 3: oscillati on frequency, pfmduty, u.v.l.o., efficiency circuit 4: ext on resistance, fb current circuit 5: soft-start (externally set: b and d series) vss vin ce/css ext/ fb a cin:1uf a vss vin ce/css ext/ fb v v cin:1uf probe vss vin ce/css ext/ fb cin:1uf v a v a vss vin ce/css ext/ fb v v cin:1uf probe rss css
14/22 XC9220 / xc9221 series XC9220/21x095xx 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 1000 10000 output current: iout (ma) efficiency: effi (% ) tr:2sj646, sbd:de5pc3, cdrh127- 10uh, cin=10uf( cer amic), cl=44uf( cer amic) , rsense=50moh m vin=12v => vout=5 v pwm(XC9220) pfm(xc9221) XC9220/21x095xx 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 1000 10000 output current: iout (ma) efficiency: effi (% ) tr:2sj646, sbd:de5pc3, cdrh127-10uh cin=10uf(ceramic), cl=44uf( cer amic), rsense=50moh m vout=3.3 v vin=5.0v pwm(XC9220) pfm(xc9221) vin=12v XC9220/21x095xx 4.4 4.6 4.8 5.0 5.2 5.4 0.1 1 10 100 1000 10000 output current: iout (ma) output voltage: vout (v) tr:2sj646, sbd:de5pc3, cdrh 127- 10uh cin=10uf( cer amic) , cl=44uf(ceramic) , rsense=50moh m vin=12v => vout=5 v pwm(XC9220) pfm ( xc9221 ) XC9220/21x095xx 2.7 2.9 3.1 3.3 3.5 3.7 0.1 1 10 100 1000 10000 output current: iout (ma) output voltage: vout (v) tr:2sj646, sbd:de5pc3, cdrh 127- 10uh cin=10uf( ceramic) , cl=44uf(ceramic) , rsense=50moh m vout=3.3 v vin=5.0v 12v pwm(XC9220) pfm ( xc9221 ) XC9220/21x095xx 0 20 40 60 80 100 0.1 1 10 100 1000 10000 output cur r ent: iout ( ma ) ripple voltage: vr (mv) tr:2sj646, sbd:de5pc3, cdrh 127- 10uh cin=10uf( cer amic) , cl=44uf(ceramic) , rsense=50moh m vin=12v => vout=5 v pwm(XC9220) pfm(xc9221) XC9220/21x095xx 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 1000 10000 output current: iout (ma) ripple voltage: vr (mv) tr:2sj646, sbd:de5pc3, cdrh127-10uh cin= 10uf( cer amic), cl=44uf(ceramic) , rsense=50moh m vout=3.3 v vin=5.0v pwm(XC9220) pfm(xc9221) vin=12v electrical characteristics (continued) (1) efficiency vs. output current (2) output voltage vs. output current (3) output ripple voltage vs. output current
15/22 XC9220/xc9221 series XC9220/21 series 0.75 0.80 0.85 0.90 0.95 1.00 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) fb voltage: vfb (v) vin=5 v XC9220/21 series 0.75 0.80 0.85 0.90 0.95 1.00 2 4 6 8 10 12 14 16 input voltage: vin (v) fb voltage: vfb (v) ta=85 25 -40 XC9220/21 series 0 10 20 30 40 50 -50-250 255075100 ambient temperature: ta ( ) supply current: idd (ua ) vin=5v, fosc=300k,500khz XC9220/21 series 0 10 20 30 40 50 0246810121416 input voltage: vin (v) supply current: idd (ua ) fosc=300k,500khz ta=85 25 -40 XC9220/21x095xx 400 425 450 475 500 525 550 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) vin=5 v XC9220/21series 1.8 2.0 2.2 2.4 2.6 2.8 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) uvlo voltage: vuvlo (v) uvlo(release) uvlo(detect) frequency: fosc (khz) electrical characteristics (continued) (4) fb voltage temperature characteristics (6) input voltage temperature characteristics (5) fb voltage vs. input voltage (7) supply current vs. input voltage (8) oscillation frequency temper ature characteristics (9) u.v.l. o. temperature characteristics
16/22 XC9220 / xc9221 series XC9220/21 series 0 5 10 15 20 25 30 0 2 4 6 8 10121416 input voltage: vin (v) ta=85 25 -40 XC9220/21series 0 5 10 15 20 25 30 0246810121416 input voltage: vin (v) ta=85 25 -40 ext/l resistance:rextbl ( ? ) ext/h resistance:rextbh ( ? ) XC9220/21 series 2.0 3.0 4.0 5.0 6.0 7.0 8.0 -50-250 255075100 ambient temperature: ta ( ) soft-start time: tss (msec ) vin=5v, fosc=300k,500khz XC9220/21series 1.0 1.5 2.0 2.5 3.0 3.5 4.0 -50-250 255075100 ambient temperature: ta ( ) soft-start time : tss (msec ) vin=5v, fosc=1.0mhz XC9220/21a, b series 0.0 0.4 0.8 1.2 1.6 2.0 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) vin=5v, fosc=300k,500khz XC9220/21a, b series 0.0 0.2 0.4 0.6 0.8 1.0 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) vin=5v, fosc=1mhz integral protection time: tpro (msec) integral protection time: tpro (msec) electrical characteristics (continued) (10) ext h on resistance characteristics (11) ext l on resistance characteristics (11) soft-start time temperature characteristics (12) integral protection time temperature characteristics
17/22 XC9220/xc9221 series XC9220/21 series 0.3 0.4 0.5 0.6 0.7 0.8 -50-250 255075100 ambient temperature: ta ( ) short-protection voltage: vshort (v) vin=5 v XC9220/21 series 0.3 0.4 0.5 0.6 0.7 0.8 0246810121416 input voltage: vin (v) short-protection voltage: vshort (v) XC9220/21 series 0.0 0.2 0.4 0.6 0.8 1.0 1.2 -50 -25 0 25 50 75 100 ambient temperature: ta ( ) ce voltage: vceh, vcel (v ) vin=5 v ce_h ce_l XC9220/21 series 0.0 0.2 0.4 0.6 0.8 1.0 1.2 0246810121416 input voltage: vin (v) ce voltage: vceh, vcel (v ) ce_h ce_l electrical characteristics (continued) (13) short-circuit protection temperature characteristics (14) short-circuit protection voltage vs. input voltage (15) ce threshold temperature characteristics (16) ce threshold vs. input voltage
18/22 XC9220 / xc9221 series electrical characteristics (continued) (17) load transient response characteristics XC9220x095xx (500khz, pwm control) tr: 2sj616 (sanyo), sbd: d1fh3 (shindengen), l=10 h cdrh8d43, sumida) c in =47 f (os-con), cl=47 f (os-con) i out =0.1ma 1000ma v in =5.0v, v out =3.3v, v out =100mv/div., time=50 s/div. v in =5.0v, v out =3.3v, v out =100mv/div., time=10ms/div. i out =0.1ma 1000ma v in =10.0v, v out =3.3v, v out =100mv/div., time=50 s /div. v in =10.0v, v out =3.3v, v out =100mv/div., time=10ms/div. v in =10.0v, v out =3.3v, v out =100mv/div., time=50 s /div. v in =10.0v, v out =3.3v, v out =100mv/div., time=10ms/div. i out =300ma 3000ma
19/22 XC9220/xc9221 series packaging information ? sot-25 (sot-23-5) ? usp-6c
20/22 XC9220 / xc9221 series packaging information (continued) ? usp-6c recommended pattern layout ? usp-6c recommended metal mask design
21/22 XC9220/xc9221 series usp-6c (top view) ??? ? represents product series mark product series m XC9220xxxxxx n xc9221xxxxxx ? represents product types mark function product series a soft-start internally set with integral protection function xc922xaxxxxx b soft-start externally set with integral protection function xc922xbxxxxx c soft-start internally set without integral protection function xc922xcxxxxx d soft-start externally set without integral protection function xc922xdxxxxx ? represents oscillation frequency mark oscillation frequency product series 3 300khz xc922xxxx3xx 5 500khz xc922xxxx5xx a 1.0mhz xc922xxxxaxx ? represents product series mark product series 1 XC9220xxxxxx d xc9221xxxxxx ? represent product types mark functions product series a soft-start internally set with integral protection function xc922xaxxxxx b soft-start externally set with integral protection function xc922xbxxxxx c soft-start internally set without integral protection function xc922xcxxxxx d soft-start externally set without integral protection function xc922xdxxxxx ?? represents fb voltage mark ? ? fb voltage product series 0 9 0.9v fixed xc922xx09xxx ? represents oscillation frequency mark oscillation frequency product series 3 300khz xc922xxxx3xx 5 500khz xc922xxxx5xx a 1.0mhz xc922xxxxaxx ? marking rule ? sot-25 ? represents production lot number 0 to 9, a to z and inverted 0 to 9, a to z repeated. (g, i, j, o, q, w expected.) ? usp-6c ? represents production lot number 0 to 9, a to z repeated. ? (g, i, j, o, q, w expected.) ? * no character inversion used. sot-25 (top view)
22/22 XC9220 / xc9221 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 inform ation in this catalog 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 info rmation and circuitry in this catalog. 3. please ensure suitable shipping controls (including fail-safe designs and aging protection) are in force for equipment employing products listed in this catalog. 4. the products in this catalog are not developed, designed, or approved for use with such equipment whose failure of malfunction ca n 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 catalog within the specified ranges. should you wish to use the products under conditions exceeding the specifications, please consult us or our representatives. 6. we assume no responsibility for damage or loss due to abnormal use. 7. all rights reserved. no part of this ca talog may be copied or reproduced without the prior permission of torex semiconductor ltd.

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