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1/23 xc9103/xc9104/xc9105 series ceramic capacitor compatible, step-up dc/dc controllers ? ? ? ? ? ? ? general description the xc9103/xc9104/xc9105 series are pwm, pwm/pfm auto switching /manual switching c ontrolled universal step-up dc/dc converter controllers. output will be stable no matter which load capacitors are used but should a low esr capacitor be used, r sense of about 0.1
will be required and phase compensation will be achieved. this allows the use of ceramic capacitors and enables to obtain lower output ripple and small pcb design. tantalum and electrolytic capacitors can also be used, in which case, r sense becomes unnecessary. with 0.9v internal voltage reference and by using externally connected two resistors, output voltage can be set freely within a range of 1.5v to 30v. the series is available in 300 khz an d 180 khz frequencies, the size of the external components can be reduced. 100 khz and 500 khz are also available in custom options. the xc9103 offers pwm operation. the xc9104 offers pwm/pfm auto matic switching operation. the pwm operation is shifted to the pfm operation automatically at light load so that it maintains high efficiency over a wide range of load currents. the xc91 05 offers both pwm and pwm/pfm auto switching operat ions and it can be selected by external signal. a current limiter circuit is built-in to the ic (except with the 500 khz version) and monitors the ripple voltage on the fb pin . operation is shut down when t he ripple voltage is more than 250mv. the operatio ns of the ic can be returned to normal with a toggle of the ce pin or by turning the power supply back on. applications ? pdas ? cellular phones ? palmtop computers ? portable audio systems ? various multi-function power supplies typical application circuit ? typical performance characteristics ? greenoperation compatible features input voltage range : 0.9v ~ 10v supply voltage range : 1.8v ~ 10v output voltage range : 1.5v ~ 30v set freely with the reference voltage 0.9v( ? 2.0%) and two resistors oscillation frequency : 100, 180, 300, 500khz ( ? 15%) 180, 300khz only for xc9103/04/05b type (with current limiter) output current : more than 400ma (v in =1.8v, v out =3.3v) controls : pwm (xc9103) pwm/pfm auto-switching (xc9104) pwm/pfm manual switching (xc9105) high efficiency : 85% (typ.) stand-by current : i stb =1.0 a (max.) load capacitors : low esr capacitors compatible current limiter function : operates when ripple voltage=250mv also available without current limite r (100khz and 500khz types are available only without current limiter) package : sot-25, usp-6b etr0404_003
2/23 xc9103/xc9104/xc9105 series pin number sot-25 usp-6b pin name function 1 6 fb output resistor connection 2 2 v dd supply voltage ce chip enable 3 4 ce (/pwm) serves as both pwm/pfm switching pin and ce pin for xc9105 4 3 gnd ground 5 1 ext external transistor connection - 5 nc no connection designator description symbol description b : with current limiter (180khz, 300khz only) type of dc/dc controller d : without current limiter output voltage 09 : fb voltage (e.g. fb voltage=0.9v =0, =9) 3 : 300khz 1 : 100khz 2 : 180khz oscillation frequency 5 : 500khz m : sot-25 (sot-23-5) package d : usp-6b r : embossed tape, standard feed device orientation l : embossed tape, reverse feed pin configuration pin assignment ? product classification ? ordering information xc9103 ?????? : pwm control xc9104 ?????? : pwm/pfm automatic switching control xc9105 ?????? : pwm/pfm manual switching control the dissipation pad for the usp-6b package 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 dd (no.2) pin. fb 6 nc 5 ce 4 1 ext 2 vdd 3 gnd (top view) fb vdd ce gnd ext
3/23 xc9103/xc9104/xc9105 series ? block diagram ? a bsolute maximum ratings parameter symbol ratings units v dd pin voltage v dd -0.3 ~ 12.0 v fb pin voltage fb -0.3 ~ 12.0 v ce pin voltage v ce -0.3 ~ 12.0 v ext pin voltage v ext -0.3 ~ v dd + 0.3 v ext pin current i ext/ 100 ma sot-25 150 power dissipation usp-6b pd 100 mw operating temperature range topr -40 ~ +85 ? storage temperature range tstg -40 ~ +125 ? ta = 2 5 ?
4/23 xc9103/xc9104/xc9105 series parameter symbol conditions min. typ. max. units circuit output voltage v out 3.234 3.300 3.366 v ? output voltage range v outset v in= v outset x0.6, v dd =3.3v i out =10ma, using 2sd1628 1.5 - 30.0 v ? fb control voltage v fb 0.882 0.900 0.918 v ? supply voltage range (*1) v dd 1.8 - 10.0 v operation start voltage v st1 recommended circuit using 2sd1628, i out =1.0ma - - 0.9 v ? oscillation start voltage (*1) v st2 no external components, ? ce connected to v dd , voltage applied, fb=0v - - 0.8 v ? operation hold voltage v hld recommended circuit using 2sd1628, i out =1.0ma - - 0.7 v ? supply current 1 i dd1 same as v st2 , v dd =3.3v - 45 64 a ? supply current 2 i dd2 same as i dd1 , fb=1.2v - 17 24 a ? stand-by current i stb same as i dd1 , ce=0v - - 1.0 a ? oscillation frequency fosc same as i dd1 153 180 207 khz ? maximum duty cycle maxdty same as i dd1 75 81 87 % ? pfm duty rate pfmdty no load (xc9104b/d, 9105b/d) 20 28 36 % ? overcurrent sense voltage (*3) v lmt step input to fb (pulse width: 2.0 s or more), ext=low level voltage (xc9103b, 9104b, 9105b) 170 250 330 mv ? efficiency effi recommended circuit using xp161a1355 - 85 - % ? soft-start time t ss 5.0 10.0 20.0 ms ? ce ?high? voltage (*2) v ceh same as i dd1 0.65 - - v ? ce ?low? voltage (*2) v cel same as i dd1 - - 0.20 v ? pwm ?high? voltage (*2) v pwmh i out =1.0ma (xc9105b/d) v dd -0.2 - v ? pwm ?low? voltage (*2) v pwml i out =1.0ma (xc9105b/d) - - v dd -1.0 v ? ext ?high? on resistance r exth same as i dd1 , v ext =v out -0.4v - 24 36
? ext ?low? on resistance r extl same as i dd1 , v ext =0.4v - 16 24
? ce ?high current i ceh same as i dd2 , ce=v dd - - 0.1 a ? ce ?low? current i cel same as i dd2 , ce=0v - - - 0.1 a ? fb ?high? current i fbh same as i dd2 , ce=v dd - - 0.1 a ? fb ?low? current i fbl same as i dd2 , ce=0v - - - 0.1 a ? electrical characteristics ( fosc=180khz ) ???? ta = 2 5 ? xc9103b092mr, xc9104b092mr, xc9105b092mr xc9103d092mr, xc9104d092mr, xc9105d092mr test conditions: unless otherwise stated, cl: ceramic, recommended mosfet should be connected. v out =3.3v, v in =2.0v, i out =170ma note: *1 although the ic starts step-up operations from a v dd of 0.8v, the output voltage and oscillation frequency are stabilized at v dd 1.8v. therefore, a v dd of more than 1.8v is recommended when v dd is supplied from v in or other power sources. *2 with the xc9105 series, the ce pin also serves as a pwm/pfm switching pin. in operation, pwm control is selected when the vo ltage at the ce pin is more than v dd -0.2v. on the other hand, pwm/pfm automatic switching control at a duty = 25% is selected when the voltage at the ce pin is less than v dd -1.0v and more than v ceh . *3 the overcurrent limit circuit of this ic is designed to monitor the ripple voltage so please select your external components carefully to prevent v lmt being reached under low temperature conditions as well as normal operating conditions. following current limiter circuit operations, which in turn causes the ic's operations to stop, the operati ons of the ic can be returned to normal with a toggle of the ce pin or by turning the power supply back on.
5/23 xc9103/xc9104/xc9105 series parameter symbol conditions min. typ. max. units circuit output voltage v out 3.234 3.300 3.366 v ? output voltage range v outset v in= v outset x0.6, v dd =3.3v i out =10ma, using 2sd1628 1.5 - 30.0 v ? fb control voltage v fb 0.882 0.900 0.918 v ? supply voltage range (*1) v dd 1.8 - 10.0 v operation start voltage v st1 recommended circuit using 2sd1628, i out =1.0ma - - 0.9 v ? oscillation start voltage (*1) v st2 no external components, ? ce connected to v dd , voltage applied, fb=0v - - 0.8 v ? operation hold voltage v hld recommended circuit using 2sd1628, i out =1.0ma - - 0.7 v ? supply current 1 i dd1 same as v st2 , v dd =3.3v - 62 88 a ? supply current 2 i dd2 same as i dd1 , fb=1.2v - 16 22 a ? stand-by current i stb same as i dd1 , ce=0v - - 1.0 a ? oscillation frequency fosc same as i dd1 255 300 345 khz ? maximum duty cycle maxdty same as i dd1 75 81 87 % ? pfm duty rate pfmdty no load (xc9104b/d, 9105b/d) 24 32 40 % ? overcurrent sense voltage (*3) v lmt step input to fb (pulse width: 2.0 s or more), ext=low level voltage (xc9103b, 9104b, 9105b) 220 300 380 mv ? efficiency effi recommended circuit using xp161a1355 - 85 - % ? soft-start time t ss 5.0 10.0 20.0 ms ? ce ?high? voltage (*2) v ceh same as i dd1 0.65 - - v ? ce ?low? voltage (*2) v cel same as i dd1 - - 0.20 v ? pwm ?high? voltage (*2) v pwmh i out =1.0ma (xc9105b/d) v dd -0.2 - - v ? pwm ?low? voltage (*2) v pwml i out =1.0ma (xc9105b/d) - - v dd -1.0 v ? ext ?high? on resistance r exth same as i dd1 , v ext =v out -0.4v - 24 36
? ext ?low? on resistance r extl same as i dd1 , v ext =0.4v - 16 24
? ce ?high current i ceh same as i dd2 , ce=v dd - - 0.1 a ? ce ?low? current i cel same as i dd2 , ce=0v - - - 0.1 a ? fb ?high? current i fbh same as i dd2 , ce=v dd - - 0.1 a ? fb ?low? current i fbl same as i dd2 , ce=0v - - - 0.1 a ? ( fosc=300 khz ) ????? ta = 2 5 ? xc9103b093mr, xc9104b093mr, xc9105b093mr xc9103d093mr, xc9104d093mr, xc9105d093mr electrical characteristics (continued) test conditions: unless otherwise stated, cl: ceramic, recommended mosfet should be connected. note: *1 although the ic starts step-up operations from a v dd of 0.8v, the output voltage and oscillation frequency are stabilized at v dd 1.8v. therefore, a v dd of more than 1.8v is recommended when v dd is supplied from v in or other power sources. *2 with the xc9105 series, the ce pin also serves as a pwm/pfm switching pin. in operation, pwm control is selected when the vo ltage at the ce pin is more than v dd -0.2v. on the other hand, pwm/pfm automatic switching control at a duty = 25% is selected when the voltage at the ce pin is less than v dd -1.0v and more than v ceh . *3 the overcurrent limit circuit of this ic is designed to monitor the ripple voltage so please select your external components carefully to prevent v lmt being reached under low temperature conditions as well as normal operating conditions. following current limiter circuit operations, which in turn causes the ic's operations to stop, the operati ons of the ic can be returned to normal with a toggle of the ce pin or by turning the power supply back on.
6/23 xc9103/xc9104/xc9105 series ??????????????????????????????????????????????????????????????? ??????? ????? ? typical application circuit notes on use when obtaining v dd from a source other than v out , please insert a capacitor c in between the v dd pin and the gnd pin in order to provide stable operations. please place c l and c in as close as to the v out and v dd pins respectively and also close to the gnd pin. strengthen the wiring sufficiently. rsense should be removed and shorted when the c l capacitor except for ceramic or low esr capacitor is used. insert r b and c b when using a bipolar npn transistor. s ce s pwm conditions on chip disable off on duty=25%, pwm/pfm automatic switching off off pwm by using external signals, the c ontrol of the xc9105 series can be alternated between pwm control a nd pwm/pfm automatic switching control. by inputting a voltage of more than v dd -0.2v to the ce/pwm pin, pwm control can be selected . on the other hand, pwm/pfm automatic switching control can be sele cted by inputting a voltage of less than v dd -1.0v. with the xc9105, by connecting resistors of the same value (r m1 , r m2 ) as shown in the diagram to the left, it is possible to obtain chip disable with s ce on and, s pwm on or off, pwm/pfm auto switching at duty=25% with s ce off & s pwm on, & pfm control with both switches off. note: when operating at v dd -1.8v and below (stepping-up from vin=0.9v), it is necessary to pull-up to v dd in order to allow the ce/pwm pin reach the v ceh voltage level. please make sure that the ic is in pwm control (s pwm =off) when operations start. if s pwm is on, there are times when chip enable might not operate. * please select your external components carefully.
7/23 xc9103/xc9104/xc9105 series ? operational explanation the xc9103/04/05 series are step-up dc/dc converter controller ics with built-in high speed, low on resistance drivers. error amplifier is designed to monitor the output voltage, comp aring the feedback voltage (fb) with the reference voltage vref. in response to feedback of a voltage lower than the reference voltage vref, the output voltage of the error amp. decreases. this circuit generates the internal reference clock. the ramp wave generator generates a saw-tooth waveform based on outputs from the osc generator. the pwm comparator compares outputs fr om the error amp. and saw-tooth wavefo rm. when the voltage from the error amp's output is low, the extern al switch will be set to on. this circuit generates pfm pulses. the pwm/pfm automatic switching mode switches between pwm and pfm automatically depending on the load. the pwm/pfm automatic switching m ode is selected when the voltage of the ce pin is less than v dd - 1.0v, and the control switches between pwm and pfm automatically depending on t he load. pwm/pfm control turns into pfm control when threshold voltage becomes lower than voltage of error amps. pwm control mode is selected when the voltage of the ce pin is more than v dd - 0.2v. noise is easily reduced with pwm control sinc e the switching frequency is fixed. the series is suitable for noise sensitive portable audio equipment as pwm control can suppress noise during operation and pwm/pfm switching control can reduce consumption current during light load in stand-by. the reference voltage, vref (fb pin voltage)=0.9v, is adj usted and fixed by laser trimming (for output voltage settings, please refer to the notes on next page). to protect against inrush current, when the power is switched on, and also to protect against voltage overshoot, soft-start time is set internal ly to 10ms. it should be noted, however, that this circuit does not protect the load capacitor (c l ) from inrush current. with the vref voltage limited and depending upon the input to the error amps, the operation maintains a balance between the two inputs of the e rror amps and controls the ext pin's on time so that it doesn't increase more than is necessary. this function controls the operation and shut down of the ic. when the voltage of the ce pin is 0. 2v or less, the mode will be disable, the channel's operations will st op and the ext1 pin will be kept at a low level (the external n-type mosfet will be off). when the ic is in a state of disable, current consumption will be no more than 1.0 a. when the ce pin's voltage is 0.65v or more, the mo de will be enabled and operations will recommence.
8/23 xc9103/xc9104/xc9105 series ? operational explanation (continued) < output voltage setting> output voltage can be set by adding external split resistors. output 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 2 m
or less. v out = 0.9 x (r fb1 + r fb2 ) / r fb2 the value of c fb1 , speed-up capacitor for phase compensation, should result in fzfb = 1/(2 c fb r fb1 ) equal to 5 to 30khz. adjustments are required depending on the application, value of inductance (l), and value of load capacity (cl). fzfb = 30khz (l=10 h) [ example of equation ] fzfb = 20khz (l=22 h) r fb1 : 120k
? ? r fb2 : 45k
fzfb = 10khz (l=47 h) c fb : 47pf (fzfb = 30khz, l = 10 h) 68pf (fzfb = 20khz, l = 22 h) 130pf (fzfb = 10khz, l = 47 h) < the use of ceramic capacitor cl > the circuit of the xc9103/04/05 series is organized by a specialized circuit, which reenacts negative feedback of both voltage and current. also by insertion of approximately 100m
of a low and inexpensive sense resistor as current sense, a high degree of stability is possible even using a ceramic capaci tor, a condition which used to be difficult to achieve. compared to a tantalum condenser, because the series can be operat ed in a very small capacity, it is suited to use of the ceramic capacitor, which is cheap and small. < external components > tr : *when a mosfet is used: xp161a1355pr (n-ch power mosfet, torex) note*: as the breakdown voltage of xp161a1355 is 8v, take care with the power supply voltage. with output voltages over 6v, use the xp161a1265 with a breakdown voltage of 12v. vst1: xp161a1355pr =1.2v (max.) xp161a1265pr = 1.5v (max.) sd : ma2q737 (schottky type, matsushita) l, c l : when using ceramic type l : 22 h (cdrh5d28, sumida, fosc = 100, 180khz) 10 h (cdrh5d18, sumida, fosc = 300, 500khz) c l : 10v 10 f (ceramic type, lmk325bj106ml, taiyo yuden) use the formula below when step-up ratio and output current is large. cl = (cl standard value) x (i out (ma) / 300ma x v out / v in ) r sense : 100m
(fosc = 180, 300, 500khz) 50m
(fosc = 100khz) c l : tantalum type l : 22 h (cdrh5d28, sumida, fosc = 300khz) 47 h (cdrh5d28, sumida, fosc = 100, 180khz) except when iout(ma) / 100ma x v out / v in > 2 22 h 10 h (cdrh5d18, sumida, fosc = 500khz) c l : 16v, 47 f (tantalum type 16mce476md2, nichichemi) use the formula below when step-up ratio and output current is large. cl = (cl standard value) x (i out (ma) / 300ma x v out / v in ) r sense : not required, but short out the wire. c l : al electrolytic type l : 22 h (cdrh5d28 sumida, fosc = 300khz) 47 h (cdrh5d28 sumida, fosc = 100, 180khz) except when i out (ma) / 100ma x v out / v in > 2 22 h c l : 16v, 100 f (al electrolytic type) + 10v, 2.2 f (ceramic type) strengthen appropriately when st ep-up ratio and output current is large. r sense : not required, but short out the wire. cfb : set u p so that fzfb = 100khz. *when a npn tr. is used: 2sd1628 (sanyo) r b : 500
(adjust with tr's hse or load) c b : 2200pf (ceramic type set so that r b and pole is less than 70% of fosc) c b < 1 / (2 x r b x fosc x 0.7)
9/23 xc9103/xc9104/xc9105 series ? test circuits circuit ? circuit ? circuit ? circuit ? circuit ? circuit ? pulse voltage is applied at the fb pin using the test circuit ?
10/23 xc9103/xc9104/xc9105 series typical performance characteristics (1) output voltage vs. output current
11/23 xc9103/xc9104/xc9105 series (1) output voltage vs. out put current (continued) typical performance characteristics (continued)
12/23 xc9103/xc9104/xc9105 series (2) efficiency vs. output current (continued) typical performance characteristics (continued)
13/23 xc9103/xc9104/xc9105 series (2) efficiency vs. output current (continued) typical performance characteristics (continued)
14/23 xc9103/xc9104/xc9105 series (3) load transient response typical performance characteristics (continued) ? time (1.0 ms/div) ? time (1.0 ms/div) ? time (1.0 ms/div) ? time (1.0 ms/div) ? time (2.0 ms/div) ? time (2.0 ms/div)
15/23 xc9103/xc9104/xc9105 series (3) load transient response (continued) typical performance characteristics (continued) ? time (1.0 ms/div) ? time (10.0 ms/div) ? time (1.0 ms/div) ? time (4.0 ms/div) ? time (10.0 ms/div) ? time (4.0 ms/div)
16/23 xc9103/xc9104/xc9105 series (4) output voltage vs. power supply voltage (5) supply current 1 vs. power supply voltage (6) supply current 2 vs. power supply voltage (7) stand-by current vs. power supply voltage (8) oscillation frequency vs. power supply voltage (9) maximum duty ratio vs. power supply voltage typical performance characteristics (continued)
17/23 xc9103/xc9104/xc9105 series (10) pfm duty ratio vs. power supply voltage (11) overcurrent sense voltage vs. power supply voltage (12) soft start time vs. power supply voltage (13) ce "h" "l" voltage vs. power supply voltage (14) pwm "h" "l" voltage vs. power supply voltage (15) ext "h" on resistance vs. power supply voltage typical performance characteristics (continued)
18/23 xc9103/xc9104/xc9105 series (16) ext "l" on resistance vs. power supply voltage (17) operation start voltage vs. ambient temperature (18) operation hold volt age vs. ambient temperature (19) oscillation start voltage vs. ambient temperature (20) supply current 1 vs. power supply voltage (21) supply current 2 vs. power supply voltage typical performance characteristics (continued)
19/23 xc9103/xc9104/xc9105 series (22) oscillation frequency vs. power supply voltage (23) maximum duty cycle vs. power supply voltage (24) pfm duty ratio vs. power supply voltage typical performance characteristics (continued)
20/23 xc9103/xc9104/xc9105 series ? sot-25 ? packaging information ? usp-6b
21/23 xc9103/xc9104/xc9105 series packaging information (continued) ? usp-6b recommended pattern layout ? usp-6b recommended metal mask design
22/23 xc9103/xc9104/xc9105 series ? sot-25 ? represents product series mark product series 3 xc9103x09xmx 4 xc9104x09xmx 5 xc9105x09xmx ? represents current limit function mark functions product series b with current limit function xc9103/9104/9105b09xmx d without current limit f unction xc9103/9104/9105d09xmx ? represents oscillation frequency mark oscillation frequency product series 1 100 xc9103/9104/9105x091mx 2 180 xc9103/9104/9105x092mx 3 300 xc9103/9104/9105x093mx 5 500 xc9103/9104/9105x095mx ? ? represents production lot number 0 to 9 and a to z, reversed character of 0 to 9 and a to z repeated. (g, i, j, o, q, w excepted) ? usp-6b ? ? represents product series mark product series 6 xc9103x09xdx y xc9104x09xdx 9 xc9105x09xdx ? ? represents current limit function mark functions product series b with current limit function xc9103/9104/9105b09xdx d without current limit f unction xc9103/9104/9105d09xdx ?? represents fb voltage value mark ? ? fb voltage product series 0 9 09 xc9103/9104/9105x09xdx ? represents oscillation frequency mark oscillation frequency product series 1 100 xc9103/9104/9105x091dx 2 180 xc9103/9104/9105x092dx 3 300 xc9103/9104/9105x093dx 5 500 xc9103/9104/9105x095dx ? ? represents production lot number 0 to 9 and a to z repeated. (g , i, j, o, q, w excepted) note: no character inversion used. marking rule sot-25 (top view) usp-6b (top view)
23/23 xc9103/xc9104/xc9105 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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