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581 XC6371 6372 6373 etr0402_001.doc cmos low power consumption operating voltage :0.9v~10.0v output voltage range :2.0v~7.0v output voltage accuracy : 2.5% oscillation frequency :50khz, 100khz, 180khz(XC6371/72) 30khz ( xc6373 ) general description the XC6371/6372/6373 series are a group of pwm controlled and pwm/pfm controlled step- up dc/dc converters. the built-in 1.4 switching transistor type enables a step-up circuit to be configured using only thr ee components, a coil, a diode, and a capacitor. output voltage can be selectable in the range from 2.0v to 7.0v in increments of 100mv (accuracy: 2.5%). oscillation frequency is also selectable from 50khz, 100khz, and 180khz (accuracy: 15%) for the XC6371 and the xc6372 series. soft-start time is internally set and offers protection against in-rush currents when the power is switched on and prevents voltage overshoot. 5 pin packages, which are provided with either a ce (chip enable) function that reduces powe r consumption during shut-down mode, or a v dd pin (separated power and voltage detect pins) are available. the XC6371 series is the standard pwm controlled products. the control of the xc6372 series switches from pwm to pfm control during light loads when automatically switching is selected and the series is highl y efficient from light loads to large output currents. since t he xc6373 series is a low noise, it is suitable for a wireless circuit. also the series is particularl y suited for use with pager applications because oscillation frequency is set at 30khz ( 20%) so as to attain the lowest consumption current possible. a pplications cellular phones, pagers palmtops cameras, video recorders portable products typical application circuit typical performance characteristics features operation start voltage range : 0.9v~10v output voltage range : 2.0v~7.0v in 100mv increments highly accurate : setting voltage accuracy 2.5% oscillation frequency : 50khz, 100khz, 180khz ( 15%) selectable (XC6371/72) 30khz (xc6373) maximum output currents (tr. built-in) : 100ma(typ.) @ v in =3.0v, v out =5.0v * highly efficient (tr. built-in) : 85%(typ.) @ v in =3.0v, v out =5.0v * built-in switching transistor type. five-lead packaged units offer either chip enable o r independent v out pin option. phase compensation and soft start-up circuits built-in. small packages : sot-89, sot-89-5,usp-6b *: performance depends on external components and pcb layout. go-compatible
582 XC6371/6372/6373 series pin number sot-89 usp-6b pin name function 1 6 v ss ground 2 1 v out output voltage monitor/ic internal power supply 3 4 lx switch 2, 3, 5 nc no connection pin number sot-89-5 usp-6b pin name function 5 6 v ss ground 2 1 v out output voltage monitor/ic internal power supply 4 4 lx switch 3 3 ce chip enable 1 2, 5 nc no connection pin number sot-89-5 usp-6b pin name function 5 6 v ss ground 2 1 v dd ic internal power supply 4 4 lx switch 3 3 v out output voltage monitor 1 2, 5 nc no connection pin configuration pin a ssignment XC6371/72/73a XC6371/72/73c XC6371/72/73e *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 pin no.1.
583 XC6371/6372/6373 series designator description symbol description a : 3-pin regulator with bu ilt-in switching transistor c : stand-by capability with built-in switching transistor type of regulator e : separated v dd and v out with built-in switching transistor output voltage integer : e.g. v out =3.5v =3, =5 0 : 50khz 1 : 100khz oscillation frequency 2 : 180khz : sot-89 (XC6371/72 a type) p : sot-89-5 (XC6371/72 c/d type) package d : usp-6b r : embossed tape, standard feed device orientation l : embossed tape, reverse feed designator description symbol description a : 3-pin regulator with buil t-in switching transistor c : stand-by capability with built-in switching transistor type of regulator e : separated v dd and v out with built-in switching transistor output voltage integer : e.g. v out =3.5v =3, =5 oscillation frequency 0 : 30khz : sot-89 (xc6373 a type) p : sot-89-5 (xc6373 c/d type) package d : usp-6b r : embossed tape, standard feed device orientation l : embossed tape, reverse feed product classification selection guide ordering information XC6371 series start XC6371/73a pwm XC6371 low frequency pwm xc6373 standard chip enable separated v dd /v out XC6371/73c XC6371/73e standard chip enable separated v dd /v out pwm/pfm xc6372a xc6372c xc6372e XC6371 ????? : pwm controlled xc6372 ????? : pwm/pfm switching control xc6373 ????? : pwm controlled
584 XC6371/6372/6373 series packaging information sot-89 so t -89-5 usp-6b
585 XC6371/6372/6373 series mark product series mark product series a XC6371a 1 xc6372a a XC6371c 1 xc6372c s XC6371e 3 xc6372e oscillation frequency output voltage (v) 50khz 100khz 180khz 1.x b 1 1 2.x c 2 2 3.x f 3 3 4.x e 4 4 5.x f 5 5 6.x h 6 6 7.x k 7 7 oscillation frequency output voltage (v) 50khz 100khz 180khz x.0 0 0 a x.1 1 1 b x.2 2 2 c x.3 3 3 d x.4 4 4 e x.5 5 5 f x.6 6 6 h x.7 7 7 k x.8 8 8 l x.9 9 9 m marking rule [XC6371/72] represents product series represents integer of output voltage and oscillation frequency represents decimal number of output voltage and oscillation frequency represents production lot number 0 to 9, a to z repeated (g, i, j, o, q, w excepted). sot-89, sot-89-5 sot-89 (top view) 123 sot-89-5 ( top view )
586 XC6371/6372/6373 series mark product series 5 XC6371xxxxdx 2 xc6372xxxxdx mark product series a XC6371a c XC6371c e XC6371e mark output voltage (v) 3 3 3.3 5 0 5.0 mark oscillation frequency (khz) 0 50 1 100 2 180 marking rule (continued) usp-6b represents product series re p resents p roduct classification ? represents output voltage (ex.) represents oscillation frequency represents production lot number 0 to 9, a to z repeated (g, i, j, o, q, w excepted) note: no character inversion used. usp-6b (top view) [XC6371/72] (continued)
587 XC6371/6372/6373 series mark function product series a - built-in transistor xc6372axxxpx a ce built-in transistor xc6372cxxxpx s separated v dd and v out built-in transistor xc6372exxxpx oscillation frequency (product series) output voltage (v) 30khz (xc6373xxx0px) 1.x b 2.x c 3.x f 4.x e 5.x f 6.x h 7.x k oscillation frequency (product series) output voltage (v) 30khz (xc6373xxx0px) x.0 0 x.1 1 x.2 2 x.3 3 x.4 4 x.5 5 x.6 6 x.7 7 x.8 8 x.9 9 xc6373 represents product series represents integer of output voltage and oscillation frequency represents decimal number of output voltage and oscillation frequency represents production lot number 0 to 9, a to z repeated (g, i, j, o, q, w excepted). marking rule (continued) sot-89,sot-89-5 123 sot-89 (top view) sot-89-5 ( top view )
588 XC6371/6372/6373 series parameter symbol ratings units v out input voltage v out 12 v l x pin voltage v lx 12 v l x pin current i lx 400 ma ce input voltage v ce 12 v sot-89, 89-5 500 power dissipation usp-6b p d 100 mw v dd input voltage v dd 12 v operating temperat ure range topr -30~ 80 storage temperature range tstg -40~ 125 ta = 2 5 XC6371/72/73e note: the ce pin is only used with the XC6371c. note: built-in transistor type units use the lx pin. a bsolute maximum ratings block diagrams + vlx limiter buffer pwm control osc 50/100/180khz chip enable ce v dd ( p ) vref soft start phase comp lx v ss ext v out + vlx limiter buffer pwm control osc 50/100/180khz v dd vref phase comp soft start lx v ss ext v dd v out XC6371/72/73a, c (the v out pin serves also as v dd )
589 XC6371/6372/6373 series parameter symbol conditions min. typ. max. units output voltage v out 4.875 5.000 5.125 v maximum input voltage v in 10 - - v operation start voltage v st1 external components connected, i out =1ma - - 0.90 v oscillation start voltage v st2 no external components. apply voltage to v out lx : 10k pull-up to 5v - - 0.80 v no load input current i in v in =v out 0.8, i out =0ma (*1) - 12.8 25.7 a supply current 1 i dd1 same as v st2 , apply output voltage 0.95 to v out - 80.2 133.8 a supply current 2 i dd2 same as v st2 , apply output voltage 1.1 to v out - 8.2 16.5 a lx switch-on resistance r swon same as i dd1 , v lx =0.4v - 1.4 2.4 lx leak current i lxl no external components. v out =v lx =10v - - 1.0 a oscillation frequency fosc same as i dd1 . measuring of lx waveform 85 100 115 khz maximum duty ratio maxdty same as i dd1 . measuring of lx waveform 80 87 92 % pfm duty ratio (*4) pfmdty same as i dd1 . measuring of lx waveform 10 17 25 % lx limit voltage v lxlmt same as i dd1 . apply output voltage to lx, voltage required to produce fosc 2 0.7 - 1.3 v efficiency effi - 85 - % slow-start time t ss 4.0 10.0 20.0 ms electrical characteristics note: unless otherwise stated, v in =v out 0.6, i out =50ma. see typical applic ation circuits, circuit1 *1: the schottky diode (sd) must be type ma735, with reverse current (i r )<1.0 a at reverse voltage (v r )=10.0v.(xc6372a) *2: "supply current 1" is the supply current while the oscillato r is continuously oscillating. in actual operation the oscillat or periodicall y operates which results in less average power consumpti on. the current actually provided by an external v in source is represented by "no load input current (i in )". *3: when pwm operates at pwm mode. *4: when pfm operates at pfm mode.(xc6372a) XC6371/72a501pr v out =5.0v , fosc=100khz ta = 2 5
590 XC6371/6372/6373 series parameter symbol conditions min. typ. max. units output voltage v out 4.875 5.000 5.125 v maximum input voltage v in 10 - - v operation start voltage v st1 external components connected, i out =1ma - - 0.90 v operation start voltage v st2 no external components. apply voltage to v out , lx : 10k pull-up to 5v - - 0.80 v no load input current i in v in =v out 0.8, i out =0ma (*1) - 12.8 25.7 a supply current 1 i dd1 same as v st2 , apply output voltage 0.95 to v out - 80.2 133.8 a supply current 2 i dd2 same as v st2 , apply output voltage 1.1 to v out - 8.2 16.5 a lx switch-on resistance r swon same as i dd1 , v lx =0.4v - 1.4 2.4 lx leak current i lxl no external components, v out =v lx =10v - - 1.0 a oscillation frequency fosc same as i dd1 , measuring of lx waveform 85 100 115 khz maximum duty ratio maxdty same as i dd1 , measuring of lx waveform 80 87 92 % pfm duty ratio (*4) pfmdty same as i dd1 , measuring of lx waveform 10 17 25 % stand-by current i stb same as i dd1 - - 0.5 a ce "high" voltage v ceh same as i dd1 , lx oscillation start 0.75 - - v ce "low" voltage v cel same as i dd1 , lx oscillation stop - - 0.20 v ce "high" current i ceh same as i dd1 , v ce =v out 0.95 - - 0.25 a ce "low" current i cel same as i dd1 , v ce =0v - - -0.25 a lx limit voltage v lxlmt same as i dd1 , apply output voltage to lx, voltage required to produce fosc 2 0.7 - 1.3 v efficiency effi - 85 - % slow-start time t ss 4.0 10.0 20.0 ms XC6371/72c501pr v out =5.0v, fosc=100khz ta=25 note: unless otherwise stated, connect ce to v out , v in =v out 0.6, i out =50ma. see typical applicat ion circuits, circuit 2. *1: the schottky diode (sd) must be type ma735, with reverse current (i r )<1.0 a at reverse voltage (v r )=10.0v.(xc6372c) *2: "supply current 1" is the supply current while the oscillator is continuously oscillating. in actual operation the oscillat or periodicall y operates which results in less average power consumption. the current actually provided by an external vin source is represente d by "no load input current (i in )". *3: when pwm operates at pwm mode. *4: when pfm operates at pfm mode.(xc6372c) electrical characteristics ( continued )
591 XC6371/6372/6373 series parameter symbol conditions min. typ. max. units output voltage v out 4.875 5.000 5.125 v maximum input voltage v in 10 - - v operation start voltage v st1 external components connected, i out =1ma - - 0.90 v oscillation start voltage v st2 no external components, apply voltage to v out , lx:10k pull-up to 5v - - 0.80 v no load input voltage i in v in =v out 0.8, i out =0ma(*1) - 12.8 25.7 a supply current 1 i dd1 same as v st2 , apply output voltage 0.95 to v out - 80.2 133.8 a supply current 2 i dd2 same as v st2 , apply output voltage 1.1 to v out - 8.2 16.5 a lx switch-on resistance r swon same as i dd1 , v lx =0.4v - 1.4 2.4 lx leak current i lxl no external components, v out =v lx =10v - - 1.0 a oscillation frequency fosc same as i dd1 , measuring of lx waveform 85 100 115 khz maximum duty ratio maxdty same as i dd1 , measuring of lx waveform 80 87 92 % pfm duty ratio (*4) pfmdty same as i dd1 , measuring of lx waveform 10 17 25 % lx limit voltage v lxlmt same as i dd1 , apply output voltage to lx, voltage required to produce fosc 2 0.7 - 1.3 v efficiency effi - 85 - % slow-start time t ss 4.0 10.0 20.0 ms XC6371/72e501pr v out =5.0v, fosc=100khz ta=25 note: unless otherwise stated, connect v dd to v out , v in =v out 0.6, i out =50ma. see typical applicat ion circuits, circuit 3. *1: the schottky diode (sd) must be type ma2q735, with reverse current (i r )<1.0 a at reverse voltage (v r )=10.0v.(xc6372e) *2: "supply current 1" is the supply current while the oscillator is continuously oscillating. in actual operation the oscillat or periodicall y operates which results in less average power consumpti on. the current actually provided by external v in source is represented by "no load input current (i in )". *3: when pwm operates at pwm mode. *4: when pfm operates at pfm mode.(xc6372e) *5: when the v dd and v out pins are independently used, the voltage range at the v dd pin should be 2.2v to 10v. the ic operates from v dd =0.8v. however, output voltage and oscillation frequency are properly stabilized when v dd =2.2v or higher. electrical characteristics ( continued )
592 XC6371/6372/6373 series parameter symbol conditions min. typ. max. units output voltage v out 2.925 3.000 3.075 v maximum input voltage v in 10 - - v operation start voltage v st1 external components connected, i out =1ma - - 0.90 v oscillation start voltage v st2 no external components, apply voltage to v out , lx :10k pull-up to 5v - - 0.80 v supply current 1 i dd1 same as v st2 . apply output voltage 0.95 to v out - 13.1 21.9 a supply current 2 i dd2 same as v st2 , apply output voltage 1.1 to v out - 3.9 7.9 a lx switch-on resistance r swon same as i dd1 , v lx =0.4v - 3.4 5.7 lx leak current i lxl no external components, v out =v lx =10v - - 1.0 a oscillation frequency fosc same as i dd1 , measuring of lx waveform 24 30 36 khz maximum duty ratio maxdty same as i dd1 , measuring of lx waveform 80 87 92 % efficiency effi - 77 - % slow-start time t ss 4.0 10.0 20.0 ms parameter symbol conditions min. typ. max. units output voltage v out 3.128 3.300 3.383 v maximum input voltage v in 10 - - v operation start voltage v st1 external components connected, i out =1ma - - 0.90 v oscillation start voltage v st2 no external components, apply voltage to v out , lx :10k pull-up to 5v - - 0.80 v supply current 1 i dd1 same as v st2 , apply output voltage 0.95 to v out - 14.1 23.5 a supply current 2 i dd2 same as v st2 , apply output voltage 1.1 to v out - 4.0 8.1 a lx switch-on resistance r swon same as i dd1 . v lx =0.4v - 3.4 5.7 lx leak current i lxl no external components, v out =v lx =10v - - 1.0 a oscillation frequency fosc same as i dd1 , measuring of lx waveform 24 30 36 khz maximum duty ratio maxdty same as i dd1 , measuring of lx waveform 80 87 92 % efficiency effi - 77 - % slow-start time t ss 4.0 10.0 20.0 ms electrical characteristics (continued) xc6373a300pr v out =3.0v, fosc=30khz ta = 2 5 note: unless otherwise stated, v in =v out 0.6, i out =15ma. see typical applicat ion circuits, circuit 1. xc6373a330pr v out =3.3v , fosc=30khz ta = 2 5 note: unless otherwise stated, v in =vout 0.6, iout=16.5ma. see typical a pplication circuits, circuit 1.
593 XC6371/6372/6373 series typical apprication circuits circuit 1: xc6372a series circuit 3: xc6372e series circuit 2: xc6372c series l : 100 h (cr54, sumida) l : 100 h (cr54, sumida) l : 100 h (cr54, sumida) l : 100 h (cr54, sumida) sd : ma2q735 (schottky diode; matushita) c l : 16v47 f ( tantalum ca p acitor, nichichemi mce ) sd : ma2q735 (schottky diode; matushita) c l : 16v 47 f ( tantalum ca p acitor, nichichemi mce ) sd : ma2q735 (schottky diode; matushita) c l : 16v 47 f (tantalum capacitor; nichichemi mce)
594 XC6371/6372/6373 series typical performance characteristics (1) output voltage vs. output current 0.1 1 1 0 100 1000 l 100 h cr54 c l 47 f tantalum output current:i out ma XC6371a301pr 3.10 3.05 3.00 2.95 2.90 output voltage:v out v 2.7v 1.8v 1.5v 1.2v v in =1.0v 4.8 4.9 5.0 5.1 5.2 0.1 1 10 100 100 0 xc6372a501p r 3.0v output voltage:v out v output current:i out (ma) l 100 h c 54 c l 47 f tantalum 1.5v 2.0v 4.0v 1.2v v in =0.9v 2.90 2.95 3.00 3.05 3.10 0.1 1 10 100 100 0 xc6372a301p r output voltage:v out v output current:i out (ma) v in =0.9v 1.5v 2.7v 1.2v 1.8v l 100 h c 54 c l 47 f tantalum 2.90 2.95 3.00 3.05 3.10 0.1 1 10 100 1000 xc6373a300pr l=100 h(c 54),c l =47 f( ???? ) 1.5v 1.2v 1.8v 2.7v v in =0.9v output current: i out (ma) output voltage: v out ( v ) l 100 h(cr54), c l 47 f tantalum 0.1 1 10 100 100 0 l 100 h ( cr54 ), c l 47 f ( tantalum ) output current:i out ma XC6371a501p r 5.2 5.1 5.0 4.9 4.8 output voltage:v out v 4.0v 3.0v 2.0v 1.5v 1.2v v in =0.9v 1000
595 XC6371/6372/6373 series (2) efficiency vs. output current typical performance characteristics ( continued ) 0 20 40 60 80 100 0.1 1 10 100 100 0 1.5v xc6373a300p r 1.2v 1.8v 2.7v l 100 h(cr54), c l 47 f tantalum v in =0.9v output current: i out (ma) efficiency: effi (%) 0.1 1 10 100 100 0 l 100 h ( cr54 ), c l 47 f ( tantalum ) output current:i out ma XC6371a301p r 100 80 60 40 20 0 efficiency:effi(%) 2.7v 1.8 v 1.2v 1.5v v in =0.9v 0.1 1 10 100 100 0 l 100 h ( cr54 ), c l 47 f ( tantalum ) output current:i out ma XC6371a501p r 100 80 60 40 20 0 efficiency:effi(%) 4.0v 2.0v 1.2v 1.5v v in =0.9v 3.0v 1000 1000 1000
596 XC6371/6372/6373 series (3) ripple voltage vs. output current typical performance characteristics ( continued ) 0 20 40 60 80 100 0.1 1 1 0 100 100 0 1.5v xc6373a300p r 1.2v 1.8v 2.7v l 100 h(cr54), c l 47 f tantalum output current: i out (ma) v in =0.9v ripple voltage: vr (mvp-p) 0 20 40 60 80 100 0.1 1 10 100 100 0 v in =0.9v 1.5v XC6371a301p r 1.2v 1.8v 2.7v ripple voltage:v r mvp-p l 100 h ( cr54 ), c l 47 f ( tantalum ) output current:i out (ma) 1000 1000 10
597 XC6371/6372/6373 series (4) no load input current vs. input voltage typical performance characteristics ( continued ) 0 100 200 300 400 500 01 XC6371a301pr input current:i in ( a) input voltage:v in (v) l 100 h c 54 c l 47 f tantalum 23 0 50 100 150 200 012345 xc6372a501pr input voltage:v in (v) input current:i in ( a) l 100 h c 54 c l 47 f tantalum
598 XC6371/6372/6373 series (5) operation start voltage / hold voltage vs. output current (6) load transient response typical performance characteristics (continued)

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