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XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function september 18, 2003 v8 low power consumption : 35 a (typ.) applications dropout voltage : 60mv @ 30ma mobile phones, cordless phones : 200mv @ 100ma wireless communication equipment maximum output current : more than 300ma (380ma limit) cameras, video recorders highly accurate : 2% portable games vr setting output voltage range : 0.9v ~ 5.6v portable av equipment detect voltage setting range : 0.9v ~ 5.5v (v in : > 2.0v) reference voltage low esr capacitor compatible battery powered equipment general description features maximum output current more than 300ma (380ma limit) dropout voltage 200mv (irout=100ma) operating voltage range 2.0v ~ 6.0v vr setting output voltage range 0.9v ~ 5.6v (100mv step, 2%) detect voltage setting range 0.9v ~ 5.5v (100mv step, 2%) when monitoring vin more than 2.0v vr.vd temperature coefficient 100ppm/ o c (typ.) low power consumption 35 a (typ.) high ripple rejection 65db (@10khz) low output noise 30mvrms ultra small packages sot-25 (sot-23-5) sot-89-5 usp-6b operating temperature range - 40 ~ 85 o c low esr capacitor compatible typical application circuits XC6403a ~ d series XC6403e series XC6403f series semiconductor ltd. the XC6403 series are highly precise, low noise, positive voltage low dropout regulators with built-in voltage detector. they are fabricated using torex?s cmos process. performance features of the series includes high ripple rejection and low dropout voltage, and the series features a voltage reference, an error amplifier, a current limiter and a phase compensation circuit plus a driver transistor. detect voltage is selectable in 100mv increments within the range of 0.9v to 5.5v and the ldo output voltage is selectable within a range of 0.9v to 5.6v, also in 100mv increments. the series is also compatible with low esr ceramic capacitors which give added output stability. this stability can be maintained even during load fluctuations due to the excellent transient response of the series. the current limiter's foldback circuit also operates as a short circuit protection for the output current limiter and the output pin. the series provides options to the user to select from a variety of circuit features, such as detector monitoring, detector output logic, ce and en pin input logic, and internal pull-up / down resistance. the ic's internal regulator circuit can be placed in stand-by mode via the en function (XC6403 a to c series). the whole ic can be put in to stand-by mode via the ce function with the XC6403d series (semi- custom). in the stand-by mode, power consumption is greatly reduced. the XC6403 a and b series features the toggle operation function. the regulator output can be off when the XC6403b series detects voltage (semi-custom). the XC6403e series can monitor another power source by using the vsen pin (semi-custom). the XC6403f series can delay the detector output: the delay time can be controlled by the use of an external capacitor (semi-custom). en/ce vin vss 4 vdout vrout 1 2 3 5 rpull 220k cl 1uf cl 1uf 4 1 2 3 5 rpull 220k cl 1uf cl 1uf vsen vin vss vdout vrout 4 1 2 3 5 rpull 220k cl 1uf cl 1uf cd 0.01uf cd vin vss vdout vrout data sheet 1
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function pin configuration pin assignment selection guide 1. toggle function, vd self-saturation as option 2. stand-by mode function as option 3. ce / en input logic, internal pull-up/down as option (* : a ~ d series) 4. vd sense as option (* : a ~ d and f series) 5. vd output logic as option 6. vd delay function as option vdout vrout nc function power input ground vr on / off control on / off control vd monitoring delay capacitor connection 4 2 pin number pin name vin vss en ce vsen cd 5 - usp-6b 3 5 1 1 1 1 6 5 - sot-89-5 1 2 5 5 5 5 4 series vr with stand-by mode function stand-by mode function toggle function (built-in) XC6403a ~ c vd output vr output ce input logic XC6403a XC6403b XC6403c ~ f vd with toggle function and self-saturation vd with no toggle function series vd with toggle function XC6403e, f chip stand-by mode function XC6403d no stand-by mode function series XC6403 * a ~ d active high with pull down XC6403 * r ~ u active low with no pull up XC6403 * e ~ k active low with pull up active high with no pull down XC6403 * l ~ p vd sense pin vin series XC6403 * a, b, e, f, l, m, r, s, v, x XC6403 e v ~ z vsen vout series vd output logic function XC6403 * c, d, h, k, n, p, t, u, y, z XC6403a ~ f detect l or detect h series delay function XC6403a ~ e no delay XC6403f delay time adjustable by connecting cd sot-25 1 2 3 3 3 3 4 no connection sot-25 (top view) semiconductor ltd. sot-89-5 (top view) usp-6b (top view) 12 3 4 5 en/ce vsen/cd vin vss vdout vrout 4 5 3 2 1 vrout vss vin en/ce vsen/cd vdout 6 5 4 1 2 3 en/ce vsen/cd vdout vss vrout nc vin data sheet 2
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function ordering information XC6403 123456 optional functions : a : toggle and en function (preliminary *) d : usp-6b vd signal/vr off function (preliminary *) c : en function m : sot-25 d : ce function e : vsen pin p : sot-89-5 f : cd pin types : as in the chart below. taping direction: r: embossed tape, standard feed l : embossed tape, reverse feed detect voltage setting range : 0.9v ~ 5.5v 100mv step increments are available pin number : 2 types * the XC6403a and XC6403b series are under development. for further detail, please ask your sales contacts. f series e & f series pin number function pin number packaging types: 1 function 2 34 6 5 vr setting output voltage range : 0.9v ~ 5.6v b : toggle, en function, internally set sequential number relating to output voltage and detect voltage (refer to the chart on page 4. e f h a b c d m n p k l u v x r s t y z en / ce function en / ce logic function function function function function function vd sense pin vd output logic pull up/down resistance pin number 1 function function function function function function function function function function nonfunctional nonfunctional nonfunctional nonfunctional active high pull-down function active high pull-down function active high nonfunctional active high nonfunctional vin detect l active high pull-down function vin detect h vrout detect l active high pull-down function vrout detect h vin detect l active high nonfunctional vin detect h vrout detect l active high nonfunctional vrout detect h active low pull-up function vin detect l active low pull-up function vin detect h active low pull-up function vrout detect l nonfunctional vin detect l active low pull-up function vrout detect h a ~ d series active low nonfunctional vrout detect l active low nonfunctional vin detect h active low vin / vsen detect l - active low nonfunctional vrout detect h - - vout / vsen detect h 2 vout / vsen detect l - - vin / vsen - detect h -- semiconductor ltd. data sheet 3
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function ordering information pin number 3 , 4 type (80 ~ 99 : standard voltage products) (34 : hysteresis range 3.0% (typ.) for an error flag) for the other voltages, please ask your sales contacts. ordering example (standard products) except for the standard products, minimum ordering quantity is 15k. 95 96 97 94 1.80 2.40 35 93 92 14 1.80 3.00 34 2.85 2.55 2.80 1.80 3.00 33 2.70 91 32 2.60 2.40 90 11 1.80 1.70 31 89 88 3.30 4.00 86 3.50 3.80 87 3.00 4.20 3.00 3.30 07 1.80 2.90 27 06 1.80 2.40 26 85 81 2.80 vdout 34 4.30 2.85 2.70 05 16 17 18 08 09 10 12 13 15 34 vrout 19 01 02 03 04 1.80 1.80 1.80 2.40 1.80 2.90 1.60 1.80 2.00 3.00 3.30 2.50 2.90 1.80 2.00 3.00 3.30 2.80 3.10 3.00 4.20 2.80 3.40 22 2.80 3.10 2.30 29 23 vrout vdout 21 3.30 3.10 2.40 25 3.20 2.80 36 30 4.00 28 24 1.80 37 38 vrout vdout 34 34 vrout vdout 80 1.80 1.60 3.10 82 1.80 2.00 83 2.50 2.80 84 2.85 3.20 vrout vdout voltage 98 99 product name product description 3.30 3.00 20 40 1.60 XC6403ce81mr en function, active high, vin sense, detect l 2.80 3.10 XC6403ch80mr en function, active high, vrout sense, detect l XC6403de82mr ce function, active high, vin sense, detect l 1.80 2.00 XC6403de83mr ce function, active high, vin sense, detect l 2.50 2.80 XC6403de84mr ce function, active high, vin sense, detect l 2.85 3.20 XC6403de85mr ce function, active high, vin sense, detect l 3.00 3.30 XC6403de86mr ce function, active high, vin sense, detect l 3.50 3.80 XC6403fv87mr cd function, vin sense, detect l 3.00 4.20 XC6403fv88mr cd function, vin sense, detect l 3.30 4.00 39 1.80 semiconductor ltd. data sheet 4
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function packaging information sot-25 sot-89-5 usp-6b semiconductor ltd. 6 5 4 1 2 3 a ' a aaa a a a 1 . 4 5 6 3 2 1 0 1 1 1 1 1 2.0 + 0.15 (0.45) 0.5+0.1 (0.05) (0.45) (0.45) 4 5 o 4 5 o 1.8+0.15 (0.27) (0.27) (0.27) ( 0.45) 4 5 o 4 5 o (0.125) (0.65) 0.005+0.002 (0.05) -0.005 +0.01 -0.05 +0.15 0.7+0.03 5-0.2+0.05 0.5+0.1 1.6+0.15 0.5+0.1 0.1+0.03 0.2+0.05 1.0+0.1 0.25+0.1 0.25+0.1 o data sheet 5
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function absolute maximum ratings electrical characteristics XC6403 series ta=25 o c irlim vin=3.1v @ vrout < 2.1v 300 vin = 2.0v vdout = 0.5v vin=3.1v % / v supply current (with pull-up resistor) idd 40 vin=vrout(t)+1.0v, ven/ce=on vrout< 0.9v vin=2.0v ven/ce =vin or vss vrout(t)+1.0v< vin< 6.0v irout=30m a 1 1 2 db v ppm / o c - 2 1 ma 1 5 4 ma 1 1 3 irout=30m a when vrout(t) < 1.25v ! vin=2.25v+0.5vp-pac vin ? ? vrout iroutmax iroutmax idd ? vrout -40 o c< topr< 85 o c vin=[vrout(t)+1.0]v+0.5vp-pac psrr when vrout(t) > 4.75v ! vin=5.75v+0.5vp-pac irout=50ma, f=10khz ? topr ? vrout ppm / o c vd hysteresis range (note 7) vr current limiter (1.7v or less) vr line regulation input voltage vr output voltage temperature characteristics vr current limiter (1.8v or more) vr ripple rejection rate vd detect voltage (note 7, 8) vr maximum output current (1.8 ~ 5.3v product) vr load regulation vr dropout voltage (note 4) supply current (no pull-up resistor) 1 ? vrout 1 300 ma ma vin = 3.1v v ma vr maximum output current (0.9 ~ 1.7v product) parameter vr output voltage (note 2, 3) vrout(e) symbol o c ma v v v 1 units vss -0.3 ~ vin + 0.3 mw parameter 500 - 40 ~ + 85 o c - 55 ~ + 125 min conditions circuit 1 100 6.5 vdf (t) x 0.02 vin=3.1v @ vrout < 2.1v 100 x 0.05 50 6.0 0.20 380 a 70 75 a 380 mv mv 15 50 mv e-1 e-2 vsen / cd vdout vss -0.3 ~ 7.0 units typ max vce / tstg v 250 input voltage vr output current vd output current vce / vsen / cd pin voltage vd output voltage vr output voltage irlim ? ? vdf ? vdf / -40 o c< topr< 85 o c vin = 2.0v vin = 5.0v vin = 4.0v vin = 4.0v vin = 5.0v vhys operating temperature range storage temperature range sot-25 sot-89-5 usp-6b continuous power dissipation symbol vin topr ratings 7.0 700 vss -0.3 ~ vin +0.3 vriout vrout 50 16.0 14.5 4 vin=vrout(t)+1.0v, ven/ce=on vrout< 0.9v vin=2.0v ven/ce =vin or vss vdf (e) x 0.98 vdf (t) x 1.02 vdf (t) pd 100 v 2 7.0 8.0 17.0 9.0 4 v vdf (t) x 0.08 15.5 7.0 12.0 voltage detector vin = 3.0v 3.0 10.0 4.0 8.0 6.0 vd supply current iddvd a vin = 6.0v 7.5 15.0 vd output current (note 9) idout ma vin = 6.0v 5.0 vin = 3.0v 10.0 15.0 short-circuit current irshort voltage regulator ? vrout vdif1 vdif2 ma 1 semiconductor ltd. data sheet 6
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function electrical characteristics (continued) XC6403 series ta=25 o c switch (no pullup resistor) option (note 1) unless otherwise stated, vin=vout(t)+1.0v (note 2) vrout(t)=specified vr output voltage (note 4) vdif={vin1 (note6) -vrout1 (note5) } (note 5) a voltage equal to 98% of the vr output voltage whenever a stabilized vrout1=irout{vrout(t)+1.0v} is input. (note 6) vin1=the input voltage when vout1, which appears as input voltage is gradually decreased. (note 7) vdf (t) : specified detect voltage value (note 8) vdf (e) : actual detect voltage value. refer to the e-0 chart for vdf(t) values less than 1.5v. (note 9) vd output current value of detect 'l' type equal to current value during detection and that of detect 'h' type equal to current value before detection. circuit max units (i.e. the vr output voltage when "vrout(t)+1.0v" is provided at the vin pin while maintaining a certain irout value). conditions min vin (note 3) vout(e)=actual vr output voltage 1.60 typ parameter symbol ce/en "high" level voltage vce/en h ce/en "high" level current ice/en h vce/en=vin=vrout(t)+1.0v ce/en "low" level voltage vce/en l 0.10 1 0.25 v 1 v 2 ce/en "low" level current ice/en l vin=vrout(t)+1.0v, vce/en=vss -0.10 0.10 2 -0.10 delay resistance rdelay vin=6.0v, cd=0v 6 delay resistance=6.0v/delay current 1.0 2.0 3.5 m ? semiconductor ltd. data sheet 7
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function electrical characteristics (continued) XC6403 aa / ad / ae / ah series ta=25 o c units circuit max min x 0.98 150 300 0.01 0.20 typ parameter symbol conditions 100 voltage regulator vr output voltage (note 2, 3) vrout(e) irout=30ma vr maximum output current (0.9 ~ 1.7v product) iroutmax vin = 3.1v vr maximum output current (1.8 ~ 5.3v product) iroutmax vin=3.1v @ vrout < 2.1v vrout(t) x 1.02 v 1 ma 1 ma 1 vr load regulation ? vrout 1ma< irout< 100ma 15 50 mv 1 1 vdif2 irout=100ma e-2 mv 1 vdif1 irout=30ma e-1 mv vr dropout voltage (note 4) 40 75 a 2 a 2 supply current (ae / ah series) idd supply current (aa / ad series) idd vr line regulation ? vrout vrout(t)+1.0v< vin< 6.0v ? vin ? vrout irout=30ma % / v 1 input voltage vin 2.0 6.0 v vr output voltage temperature characteristics ? vrout irout=30ma ? topr ? vrout -40 o c< topr< 85 o c ppm / o c 1 vr ripple rejection rate psrr vin=[vrout(t)+1.0]v+0.5vp-pac when vrout(t) < 1.25v ! vin=2.25v+0.5vp-pac when vrout(t) > 4.75v ! vin=5.75v+0.5vp-pac irout=50ma, f=10khz 65 db 3 vr current limiter (1.8v or more) irlim vin=3.1v @ vrout < 2.1v ven = vin 300 380 ma 1 vr current limiter (1.7v or less) irlim vin=3.1v, ven=vin 380 ma 1 vd detect voltage (note 7, 8) vdf (e) x 0.98 vdf (t) x 1.02 v 4 voltage detector vd hysteresis range (note 8) vhys vd supply current (note 9) iddvd vin = 2.0v vin = 6.0v vd output current (note 10) idout 4 x 0.02 x 0.05 x 0.08 vdf (t) vdf (t) vdf (t) v 6.5 14.5 a 8.0 16.0 9.0 17.0 2 vin = 3.0v 7.0 15.0 vin = 4.0v 7.5 15.5 vin = 5.0v vdout = 0.5v ma 5 vin = 2.0v 3.0 6.0 vin = 3.0v 4.0 8.0 vin = 4.0v 5.0 10.0 vin = 5.0v 7.0 12.0 vin = 6.0v 10.0 15.0 vd detect voltage temperature characteristics ? vdf / -40 o c< topr< 85 o c ? topr ? vdf 100 ppm / o c 4 50 ma 1 short-circuit current irshort vin=vrout(t)+1.0v, ven=vin vin=3.1v @ vrout < 2.1v vin=ven=vrout(t)+1.0v vin=ven=vrout(t)+1.0v 35 70 semiconductor ltd. data sheet 8
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function electrical characteristics (continued ) XC6403 aa / ad / ae / ah serie s ta=25 o c switch (note 1) unless otherwise stated, vin=vout(t)+1.0v (note 2) vr out (t)=specified vr output voltage (note 4) vdif={vin1 (note6) -vrout1 (note5) } (note 5) a voltage equal to 98% of the vr output voltage whenever a stabilized vrout1=irout{vrout(t)+1.0v} is input. (note 6) vin1=the input voltage when vout1, which appears as input voltage is gradually decreased. (note 7) vdf (t) : specified detect voltage value (note 8) vdf (e) : actual detect voltage value. refer to the e-0 chart for vdf(t) values less than 1.5v. (note 9) vd supply current = supply current when ven=vss (note 10) vd output current = sink current during detection. v parameter symbol conditions min typ max 1 units circuit en "high" level voltage ven h 1.60 vin en "high" level current (aa / ad series) ien h ven=vin=vrout(t)+1.0v -0.10 5.00 a 2 en "high" level current (ae /ah series) ien h ven=vin=vrout(t)+1.0v 2 -0.10 0.10 a vin=vrout(t)+1.0v, ven=vss (note 3) v out(e) =actual vr output voltage (i.e. the vr output voltage when "vrout(t)+1.0v" is provided at the vin pin while maintaining a certain irout value). en "low" level current ien l -0.10 0.10 a 2 0.25 v 1 en "low" level voltage ven l semiconductor ltd. data sheet 9
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function electrical characteristics (continued ) XC6403 ca / cd / ce / ch series ta=25 o c 35 70 a supply current (ce / ch series) idd vin=ven=vrout(t)+1.0v 1 2 1 50 mv ma ma x 1.02 iroutmax vin = 3.1v 150 % / v 1 idd vin=ven=vrout(t)+1.0v 40 6.0 v voltage regulator vr output voltage (note 2, 3) v 1 75 e-2 15 2 0.01 0.20 supply current (ca / cd series) a mv 1 vdif2 irout=100ma mv 1 1 irout=30ma e-1 x 0.98 vrout(t) max vdif1 vr dropout voltage (note 4) circuit vrout(e) irout=30ma units vr load regulation ? vrout 1ma< irout< 100ma min 300 typ vr maximum output current (1.8 ~ 5.3v product) vr maximum output current (0.9 ~ 1.7v product) iroutmax vin=3.1v @ vrout < 2.1v parameter symbol conditions vr line regulation ? vrout vrout(t)+1.0v< vin< 6.0v ? vin ? vrout irout=30ma input voltage vin 2.0 vr output voltage temperature characteristics ? vrout irout=30ma 100 ppm / o c ? topr ? vrout -40 o c< topr< 85 o c psrr vin=[vrout(t)+1.0]v+0.5vp-pac when vrout(t) < 1.25v ! vin=2.25v+0.5vp-pac when vrout(t) > 4.75v irout=50ma, f=10khz 1 3 db ma ! vin=5.75v+0.5vp-pac vr current limiter (1.8v or more) irlim vin=3.1v @ vrout < 2.1v ven = vin 300 65 vr ripple rejection rate 1 vr current limiter (1.7v or less) irlim vin=3.1v, ven=vin 380 ma 1 380 short-circuit current irshort vin=vrout(t)+1.0v, ven=vin vin=3.1v @ vrout < 2.1v 50 ma 1 vd detect voltage (note 7, 8) vdf (e) x 0.98 vdf (t) x 1.02 v 4 voltage detector vd hysteresis range (note 8) vhys vd supply current (note 9) iddvd vin = 2.0v vin = 6.0v vd output current (note 10) idout 4 x 0.02 x 0.05 x 0.08 vdf (t) vdf (t) vdf (t) v 6.5 14.5 a 8.0 16.0 9.0 17.0 2 vin = 3.0v 7.0 15.0 vin = 4.0v 7.5 15.5 vin = 5.0v vdout = 0.5v ma 5 vin = 2.0v 3.0 6.0 vin = 3.0v 4.0 8.0 vin = 4.0v 5.0 10.0 vin = 5.0v 7.0 12.0 vin = 6.0v 10.0 15.0 ppm / o c 4 vd detect voltage temperature characteristics ? vdf / -40 o c< topr< 85 o c ? topr ? vdf 100 semiconductor ltd. data sheet 10
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function electrical characteristics (continued ) XC6403 ca / cd / ce / ch series ta=25 o c switch (note 1) unless otherwise stated, vin=vout(t)+1.0v (note 2) vr out (t)=specified vr output voltage (note 4) vdif={vin1 (note6) -vrout1 (note5) } (note 5) a voltage equal to 98% of the vr output voltage whenever a stabilized vrout1=irout{vrout(t)+1.0v} is input. (note 6) vin1=the input voltage when vout1, which appears as input voltage is gradually decreased. (note 7) vdf (t) : specified detect voltage value (note 8) vdf (e) : actual detect voltage value. refer to the e-0 chart for vdf(t) values less than 1.5v. (note 9) vd supply current = supply current when ven=vss (note 10) vd output current = sink current during detection. min typ max parameter symbol conditions units circuit en "high" level voltage ven h 1.6 vin v 1 en "low" level voltage ven l 0.25 v 1 en "high" level current (ca / cd series) ien h ven=vin=vrout(t)+1.0v -0.10 5.00 a 2 2 en "high" level current (ce /ch series) ien h ven=vin=vrout(t)+1.0v -0.10 -0.10 0.10 a (note 3) v out(e) =actual vr output voltage (i.e. the vr output voltage when "vrout(t)+1.0v" is provided at the vin pin while maintaining a certain irout value). 0.10 a 2 en "low" level current ien l vin=vrout(t)+1.0v, ven=vss semiconductor ltd. data sheet 11
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function electrical characteristics (continued ) XC6403 da / dd / de / dh series ta=25 o c (note 1) unless otherwise stated, vin=vout(t)+1.0v (note 2) vr out (t)=specified vr output voltage (note 4) vdif={vin1 (note6) -vrout1 (note5) } (note 5) a voltage equal to 98% of the vr output voltage whenever a stabilized vrout1=irout{vrout(t)+1.0v} is input. (note 6) vin1=the input voltage when vout1, which appears as input voltage is gradually decreased. (note 7) vdf (t) : specified detect voltage value (note 8) vdf (e) : actual detect voltage value. refer to the e-0 chart for vdf(t) values less than 1.5v. (note 9) vd output current = sink current during detection. switch circuit min typ max units parameter symbol conditions voltage regulator vr output voltage (note 2, 3) vrout(e) irout=30m a vr maximum output current (1.8 ~ 5.3v product) iroutmax vin=3.1v @ vrout < 2.1v vr dropout voltage (note 4) vdif1 irout=30ma x 0.98 vrout(t) x 1.02 v 1 vr maximum output current (0.9 ~ 1.7v product) iroutmax vin = 3.1v 150 1 1 vr load regulation ? vrout 1ma< irout< 100ma 1 15 50 mv 1 irout=100ma e-2 mv 300 e-1 mv ma 1 supply current (da / dd series) idd vin=vce=vrout(t)+1.0v 40 75 a 2 vdif2 supply current (de / dh series) idd vin=vce=vrout(t)+1.0v 35 70 a 2 vr line regulation ? vrout vrout(t)+1.0v< vin< 6.0v ? ? vrout irout=30ma 0.01 0.20 % / v 1 input voltage vin 2.0 6.0 v vr output voltage temperature characteristics ? vrout irout=30ma ? topr ? vrout -40 o c< topr< 85 o c 100 ppm / o c 1 vr ripple rejection rate psrr vin=[vrout(t)+1.0]v+0.5vp-pac when vrout(t) < 1.25v ! vin=2.25v+0.5vp-pac when vrout(t) > 4.75v ! vin=5.75v+0.5vp-pac irout=50ma, f=10khz 65 db 3 vr current limiter (1.8v or more) irlim vin=3.1v @ vrout < 2.1v vce = vin 300 380 ma 1 vr current limiter (1.7v or less) irlim vin=3.1v, vce=vin 380 ma 1 short-circuit current irshort vin=vrout(t)+1.0v, vce=vin vin=3.1v @ vrout < 2.1v 50 ma 1 vd detect voltage (note 7, 8) vdf (e) x 0.98 vdf (t) x 1.02 v 4 voltage detector vd hysteresis range (note 8) vhys vd output current (note 9) idout vdout = 0.5v vin = 5.0v vin = 6.0v vd detect voltage temperature characteristics 4 x 0.02 x 0.05 x 0.08 vdf (t) vdf (t) vdf (t) v vin = 4.0v 5.0 10.0 vin = 3.0v 4.0 8.0 vin = 2.0v 3.0 6.0 10.0 15.0 4 5 ma 7.0 12.0 100 ppm / o c ? vdf / -40 o c< topr< 85 o c ? ? vdf ce "high" level voltage vce h 1 22 1 ce "high" level current (da / dd series) ice h vce=vin=vrout(t)+1.0v -0.10 5.00 a 2 2 ce "high" level current (de /dh series) ice h vce=vin=vrout(t)+1.0v -0.10 ce "low" level current ice l vin=vrout(t)+1.0v, vce=vss -0.10 0.10 % / v 2 0.10 a 2 0.10 a idd vin=vrout(t)+1.0v, vce=vss (note 3) v out(e) =actual vr output voltage (i.e. the vr output voltage when "vrout(t)+1.0v" is provided at the vin pin while maintaining a certain irout value). stand-by current (da / dd / de / dh series) 0.01 semiconductor ltd. data sheet 12
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function electrical characteristics (continued ) XC6403 ev / ex series ta=25 o c (note 1) unless otherwise stated, vin=vout(t)+1.0v (note 2) vr out (t)=specified vr output voltage (note 4) vdif={vin1 (note6) -vrout1 (note5) } (note 5) a voltage equal to 98% of the vr output voltage whenever a stabilized vrout1=irout{vrout(t)+1.0v} is input. (note 6) vin1=the input voltage when vout1, which appears as input voltage is gradually decreased. (note 7) vdf (t) : specified detect voltage value (note 8) vdf (e) : actual detect voltage value. refer e-0 chart for vdf(t) less than 1.5v. (note 9) vd output current = sink current during detection. min typ max parameter symbol conditions units circuit voltage regulator vr output voltage vrout(e) irout=30ma x 0.98 vrout(t) x 1.02 v 1 vr maximum output current (0.9 ~ 1.7v product) iroutmax vin = 3.1v 150 ma 1 vr maximum output current (1.8 ~ 5.3v product) iroutmax vin=3.1v @ vrout < 2.1v 300 ma 1 vr load regulation ? vrout 1ma< irout< 100ma 15 50 mv 1 vr dropout voltage vdif1 irout=30ma e-1 mv 1 vdif2 irout=100ma e-2 mv 1 supply current (ev / ex series) idd vin=vrout(t)+1.0v 35 70 a 2 vr line regulation ? vrout vrout(t)+1.0v< vin< 6.0v ? vin ? vrout irout=30ma 0.01 0.20 % / v 1 input voltage vin 2.0 6.0 v vr output voltage temperature characteristics ? vrout irout=30ma ? topr ? vrout -40 o c< topr< 85 o c 100 ppm / o c 1 ripple rejection rate psrr vin=[vrout(t)+1.0]v+0.5vp-pac when vrout(t) < 1.25v ! vin=2.25v+0.5vp-pac when vrout(t) > 4.75v ! vin=5.75v+0.5vp-pac irout=50ma, f=10khz 65 db 3 vr current limiter (1.8v or more) irlim vin=3.1v @ vrout < 2.1v 300 380 ma 1 vr current limiter (1.7v or less) irlim vin=3.1v 380 ma 1 short-circuit current irshort vin=vrout(t)+1.0v, vin=3.1v @ vrout < 2.1v 50 ma 1 vd detect voltage vdf (e) x 0.98 vdf (t) x 1.02 v 4 voltage detector vd hysteresis range vhys vd output current (note 9) idout vdout = 0.5v vin = 5.0v vin = 6.0v vin = 4.0v 4 x 0.02 x 0.05 x 0.08 vdf (t) vdf (t) vdf (t) v ma 5.0 10.0 7.0 12.0 3.0 6.0 vin = 3.0v 4.0 8.0 vd detect voltage temperature characteristics ? vdf / -40 o c< topr< 85 o c ppm / o c 4 ? topr ? vdf 10.0 15.0 100 5 vin = 2.0v (note 3) v out(e) =actual vr output voltage (i.e. the vr output voltage when "vrout(t)+1.0v" is provided at the vin pin while maintaining a certain irout value). semiconductor ltd. data sheet 13
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function electrical characteristics (continued ) XC6403 fv / fx / fy / fz series ta=25 o c (note 1) unless otherwise stated, vin=vout(t)+1.0v (note 2) vr out (t)=specified vr output voltage (note 4) vdif={vin1 (note6) -vrout1 (note5) } (note 5) a voltage equal to 98% of the vr output voltage whenever a stabilized vrout1=irout{vrout(t)+1.0v} is input. (note 6) vin1=the input voltage when vout1, which appears as input voltage is gradually decreased. (note 7) vdf (t) : specified detect voltage value (note 8) vdf (e) : actual detect voltage value. refer to the e-0 chart for vdf(t) values less than 1.5v. (note 9) vd supply current = sink current during detection. (i.e. the vr output voltage when "vrout(t)+1.0v" is provided at the vin pin while maintaining a certain irout value). (note 3) v out(e) =actual vr output voltage ? ? vdf 4 ppm / o c 100 15.0 10.0 vin = 6.0v 12.0 7.0 vin = 5.0v 5 ma 6.0 8.0 10.0 vdout = 0.5v idout vd output current (note 9) 3.0 vin = 2.0v 4.0 vin = 3.0v 5.0 vin = 4.0v x 0.08 x 0.05 x 0.02 4 v vdf (t) vdf (t) vdf (t) vhys vd hysteresis range (note 8) voltage detector -40 o c< topr< 85 o c ? vdf / vd detect voltage temperature characteristics 4 v x 1.02 vdf (t) x 0.98 vdf (e) vd detect voltage (note 7, 8) 1 ma 50 vin=vrout(t)+1.0v, vin=3.1v @ vrout < 2.1v irshort short-circuit current 1 ma 380 vin=3.1v irlim vr current limiter (1.7v or less) 1 ma 380 300 vin=3.1v @ vrout < 2.1v irlim vr current limiter (1.8v or more) vin=[vrout(t)+1.0]v+0.5vp-pac irout=50ma, f=10khz ! vin=5.75v+0.5vp-pac when vrout(t) > 4.75v ! vin=2.25v+0.5vp-pac 3 db 65 psrr ripple rejection rate -40 o c< topr< 85 o c ? topr ? vrout when vrout(t) < 1.25v 1 ppm / o c 100 irout=30ma ? vrout vr output voltage temperature characteristics v 6.0 2.0 vin input voltage ? vin ? vrout 1 % / v 0.20 0.01 vrout(t)+1.0v< vin< 6.0v ? vrout vr line regulation 2 a 70 35 vin=vrout(t)+1.0v idd supply current (fv / fx / fy / fz series) irout=30ma vdif1 1 mv e-2 irout=100ma 1 mv e-1 irout=30ma vr dropout voltage (note 4) 1 mv 50 15 1ma< irout< 100ma ? vrout vr load regulation vdif2 1 ma 300 vin=3.1v @ vrout < 2.1v iroutmax vr maximum output current (1.8 ~ 5.3v product) 1 ma 150 vin = 3.1v iroutmax vr maximum output current (0.9 ~ 1.7v product) 1 v x 1.02 vrout(t) x 0.98 irout=30ma vrout(e) vr output voltage (note 2, 3) voltage regulator circuit units max typ min conditions symbol parameter m ? 6 delay resistance=6.0v/delay current delay resistance rdelay vin=6.0v, cd=0v 1.0 2.0 3.5 semiconductor ltd. data sheet 14
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function v r dropout voltage 5.00 5.10 5.20 5.30 4.60 4.70 4.80 4.90 4.20 4.30 4.40 4.50 3.70 3.80 3.90 4.00 1.50 1.60 1.70 1.80 symbol vrout(t) vdf(t) 0.90 1.00 1.10 1.20 1.30 1.40 ta=25 o c ta=25 o c e-1 dropout voltage 1 (mv) (iout=30ma) e-1 dropout voltage 2 (mv) (iout=100ma) vdif1 min. max. typ. vrout / vdf 1000 1.030 1000 1100 1050 1200 1.130 900 1000 950 1.370 1.470 1.530 500 60 5.712 5.508 4.508 4.606 4.794 4.704 4.896 4.802 4.900 5.488 5.292 5.390 5.40 5.50 5.60 5.100 50 4.998 5.194 typ. max. 0.930 1050 1100 1150 1200 800 900 850 400 600 700 800 1.732 300 900 1.430 600 700 650 800 1.330 500 210 5.610 50 210 80 180 4.998 60 80 180 70 230 210 5.406 50 210 180 230 5.202 50 70 160 160 50 70 160 70 160 50 70 160 vdif2 120 150 280 120 240 240 vdif2 vdif1 500 500 600 550 700 1100 max. 750 e-0 1.632 0.870 0.970 1.070 1.170 1.230 output voltage detect voltage (v) 1.270 1.90 2.00 2.10 2.20 2.30 2.40 2.50 2.60 2.70 2.80 2.90 3.00 3.10 3.20 3.30 3.40 3.50 3.60 1.568 1.666 1.862 2.058 2.254 2.450 2.646 2.548 1.764 1.836 200 300 300 400 400 400 380 1.960 2.040 80 120 240 350 1.938 330 2.156 2.244 80 120 240 330 2.142 80 310 2.352 2.448 80 120 240 310 2.346 80 120 2.550 70 100 220 2.652 70 100 70 100 220 290 220 290 70 100 290 2.744 2.856 70 100 220 270 2.754 220 270 2.940 3.060 60 90 200 270 2.842 2.958 3.038 3.162 60 90 200 250 3.136 3.264 60 90 200 250 200 250 200 250 3.234 3.366 3.332 3.468 60 90 60 90 3.430 3.570 60 90 200 250 3.528 3.672 60 90 200 250 200 250 200 250 3.626 3.774 3.724 3.876 60 90 60 90 90 200 250 3.822 3.978 60 80 180 4.018 4.182 60 4.214 4.386 60 80 180 4.10 80 180 230 230 80 180 230 180 80 3.920 4.116 4.284 60 4.080 60 230 4.312 4.488 60 80 180 230 230 230 5.096 4.410 4.590 60 5.304 230 60 210 50 70 80 160 210 210 70 160 4.692 60 80 180 parameter specified detect voltage output voltage semiconductor ltd. data sheet 15
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function test circuits circuit 1 XC6403a ~ c series XC6403d series XC6403e series XC6403f series output capacitor corresponding char t cl 0.9 ~1.2v more than 4.7 f more than 2.2 f 1.3 ~ 1.7v vrout 1.8v ~ 5.6v more than 1.0 f semiconductor ltd. vin vrout vss vsen vdout v rl a a vin cl=**uf (ceramic) cin=1uf (ceramic) vin vrout vss ce vdout v rl v a a v vin cl=**uf (ceramic) cin=1uf (ceramic) vin vrout vss en vdout v cl=**uf (ceramic) rl v a a cin=1uf (ceramic) v vin vin vrout vss cd vdout v rl a a vin cl=**uf (ceramic) cin=1uf (ceramic) data sheet 16
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function test circuits (continued) circuit 2 XC6403a ~ c series XC6403d series XC6403e series XC6403f series semiconductor ltd. vin vrout vss en vdout a vin a cin=1uf (ceramic) vin vrout vss ce vdout a vin a cin=1uf (ceramic) vin vrout vss vsen vdout a vin cin=1uf (ceramic) vin vrout vss cd vdout a vin cin=1uf (ceramic) data sheet 17
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function test circuits (continued) circuit 3 XC6403a ~ c series XC6403d series XC6403e series XC6403f series output capacitor corresponding char t vrout 0.9 ~1.2v 1.3 ~ 1.7v cl more than 4.7 f vrout 1.25v vin={2.25v}vdc +0.5vp-pac vin={vrout+1.0v}vdc +0.5vp-pac vrout 4.75v vin={5.75v}vdc +0.5vp-pac vrout 1.25v vin={2.25v}vdc +0.5vp-pac vin={vrout+1.0v}vdc +0.5vp-pac vrout 4.75v vin={5.75v}vdc +0.5vp-pac vrout 1.25v vin={2.25v}vdc +0.5vp-pac vin={vrout+1.0v}vdc +0.5vp-pac vrout 4.75v vin={5.75v}vdc +0.5vp-pac vrout 0.9v vin={2.0v}vdc +0.5vp-pac vin={vrout+1.0v}vdc +0.5vp-pac vrout 4.75v vin={5.75v}vdc +0.5vp-pac semiconductor ltd. vin vrout vss en vdout irout=50ma cl=**uf (ceramic) v ~ v ~ vin vrout vss ce vdout irout=50ma cl=**uf (ceramic) v ~ v ~ vin vrout vss vsen vdout irout=50ma cl=**uf (ceramic) v ~ v ~ vin vrout vss cd vdout irout=50ma cl=**uf (ceramic) v ~ v ~ data sheet 18
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function test circuits (continued) circuit 4 XC6403a ~ c series [vd sense, vin type] [vd sense, vrout type] XC6403d series [vd sense, vin type] [vd sense, vrout type] XC6403e series XC6403f series [vd sense, vin type] [vd sense, vrout type] semiconductor ltd. vin vrout vss cd vdout vds vin a vin vrout vss cd vdout vds vin a cl=1uf (ceramic) cl=1uf (ceramic) vin vrout vss en vdout 100k ? vin v cl=1uf (ceramic) vin vrout vss en vdout 100k ? vin v cl=1uf (ceramic) vin vrout vss ce vdout 100k ? vin v vin vrout vss en vdout 100k ? vin v cl=1uf (ceramic) cl=1uf (ceramic) vin vrout vss vsen vdout 100k ? vin v cl=1uf (ceramic) data sheet 19
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function test circuits (continued) circuit 5 XC6403a ~ c series [vd sense, vin type] [vd sense, vrout type] XC6403d series [vd sense, vin type] [vd sense, vrout type] XC6403e series XC6403f series [vd sense, vin type] [vd sense, vrout type] semiconductor ltd. vin vrout vss en vdout vds vin a vin vrout vss en vdout vds vin a cl=1uf (ceramic) cl=1uf (ceramic) vin vrout vss ce vdout vds vin a vin vrout vss ce vdout vds vin a cl=1uf (ceramic) cl=1uf (ceramic) vin vrout vss vsen vdout vds vin a cl=1uf (ceramic) vin vrout vss cd vdout vds vin a vin vrout vss cd vdout vds vin a cl=1uf (ceramic) cl=1uf (ceramic) data sheet 20
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function test circuits (continued) circuit 6 XC6403f series [vd sense, vin type] [vd sense, vrout type] semiconductor ltd. vin vrout vss cd vdout vin a cl=1uf (ceramic) vin vrout vss cd vdout vin a cl=1uf (ceramic) data sheet 21
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function block diagrams semiconductor ltd. XC6403a, b series XC6403c, d series optional: active high with pull-down r active high with no pull-down r active low with pull-up r active low with no pull-up r vr circuit en v ss vr out v in r1 r2 tq r toggle ff r4 r3 vd out comp. vd error amp. power on clear for ff optional (b series) optional: detect h detect l c fb optional: v in sense vr out sense vr circuit (c series) each circuit (d series) en / ce v ss vr out v i n r1 r2 r4 r3 vd out comp. vd error amp. optional: detect h detect l c fb 1 shot pulse current limit voltage reference voltage reference current limit optional: v in sense vr out sense on / off control control on / off optional: active high with pull-down r active high with no pull-down r active low with pull-up r active low with no pull-up r data sheet 22
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function block diagrams (continued) semiconductor ltd. XC6403e series XC6403f series v sen v ss vr out v in r1 r2 r4 r3 vd out comp. vd error amp. optional: detect h detect l c fb rdelay v ss vr out v in r1 r2 r4 r3 vd out comp. vd error amp. rdelay optional: detect h detect l c fb optional: v in sense vr out sense current limit voltage reference current limit voltage reference data sheet 23
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function operational explanation XC6403 series> delay time rdelay standard : 1.0 ~ 3.5m ? typ : 2.0m ? output capacitor the voltage, divided by resistors r1 & r2 which are connected to the vrout pin is compared with the internal reference voltage by the error amplifier. the p-channel mosfet, which is connected to the vrout pin, is then driven by the subsequent output signal. the output voltage a t the vrout pin is controlled & stabilized by negative feedback. the current limit circuit and short circuit protection operate in relation to the level of output current. further, the voltage regulator's internal circuitry can be shutdown via the en or ce pin's signal. with the XC6403 series regulator, a stable output voltage is achievable even if low esr capacitors are used, as a phase compens ation circuit is built-in to the regulator. in order to ensure the effectiveness of the phase compensation, we suggest that an output capacitor (cl) be connected as close as possible, between the output pin (vrout) and the vss pin. please use an output capacitor (cl) with a capacitance, based on the chart below. we also suggest an input capacitor (cin) of 1 f : this should be connected between vin and vss in order to stabilize input power source. for the XC6403a, b, c type, in stand-by, if a voltage of the recovery voltage is present at the vrout pin (from another power s ource), the vdout pin will be high impedance mode, and the pull up voltage will be output at vdout. by connecting the cdelay pin to a capacitor (cd) , the XC6403f series can apply a delay time to vdout voltage when releasing voltage. the delay time can be calculated from the internal resistance, rdelay (2m ? fixed) and the value of cd as per the following equation. delay time = cdelay x rdelay x 0.7 the series' detector function monitors the voltage divided by resistors r3 & r4 which are connected to the vrout pin or the vin pin or the vsen pin, as well as monitoring the voltage of the internal reference voltage source via the comparator. the vdsen pin has options (please refer to the selection guide, item 4 on page 2). a 'high' or 'low' signal level can be output from the vdout pin when the vd pin voltage level goes b elow the detect voltage. the vd output logic has options (please refer to the selection guide, item 5 on page 2). as vdout is an open-drain n-channel o utput, a pull-up resistor of about 220k ? is needed to achieve a voltage output. because of hysteresis at the detector function, output at the vdout pin will invert w hen the detect voltage level increases above the release voltage (105% of the detect voltage). even when the XC6403a, b, c, series are in stand-by mode, the voltage detector function operates and the output voltage at vdout will output according to the voltage level at vdsense voltag e. the XC6403 series regulator offers a combination of current limit and circuit protection by means of a built-in fixed current l imiter circuit and a foldback circuit. when the load current reaches the current limit level, the fixed current limiter circuit operates and output voltage drops. as a result of this drop in output voltage, the foldback circuit operates, the output voltage drops further and output current decreases. when the output pin is shorted, a current of about 50ma flows. cl 0.9 ~1.2v 1.3 ~ 1.7v more than 4.7 f more than 2.2 f 1 f 1400 msec 700.0 ~ 2450.0 msec vrout 0.22 f 308 msec 154.0 ~ 539.0 msec 0.47 f 658 msec 329.0 ~ 1151.5 msec 0.1 f 140 msec 70.0 ~ 245.0 msec 0.022 f 30.8 msec 15.4 ~ 53.9 msec 0.047 f 65.8 msec 32.9 ~ 115.15 msec 0.01 f 14 msec 7.0 ~ 24.5 msec cdelay delay time (typ.) delay time (typ.) 1.8 ~ 5.6v more than 1.0 f semiconductor ltd. data sheet 24
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function operational explanation (continued ) ( * a ~ d series) active low with pull up XC6403 * r ~ u active low with no pull up XC6403 * a ~ d active high with pull down en logic active "high" the ic's internal regulator circuitry can be shut down via the signal from the en pin with the XC6403a, b, c series. in shutdo wn mode, output at the vrout pin will be pulled down to the vss level via r1 & r2. the whole ic's circuitry can be shut down via ce pin with the xc640 3d series and power consumption can be reduced to around 0 a. while the voltage detector is in shutdown mode, the voltage detector output is in a post-detection state. when choosing detect l, input current can be set by using the following formula. the XC6403 a and b series have a built-in toggle on/off switch which repeats an on/off operation via the en pin's leading edge signal when the en logic is active high, and via the en pin's falling edge signal when the en logic is active low (please also refer the figure be low). the en input signal duration should be over 500nsec. if the en input signal is less than 500nsec, it is possible that the circuit fails to respond and the toggle function does not operate. to operate the toggle function properly when the en pin voltage noise is large, a rc filter should be used to red uce the noise in the signal to the en pin. in the case where input delay time is required, it is possible to set the time constant by connecting an rc netw ork to the en pin. we suggest that you use this ic with either a vin voltage or a vss voltage input at the en or ce pin. if this ic is used with the correct specifications for the en or ce pin, the ic will operate normally. however, supply current may increase as a result of through current in the ic' s internal circuitry if a voltage other than vin or vss is applied. XC6403 * e ~ k active high with no pull down XC6403 * l ~ p input current = v in voltage / pull up resistance in stand-by mode, the above input current can be reduced by connecting a pull-up resistor between vrout and vdout. note that as the XC6403*e to k types of the XC6403a to d series are 'active high / no pull down' and XC6403*r to u types of the XC6403a to d series are 'active low / no pull up', operations will become unstable with the ce pin open (see the chart below). series ce input logic v in v ss en vr out vd out rpull 220k ? 1 f cl c in 1 f 1.5k ? 0.1 f v in v in gnd en pin signal vr out vr out gnd more than 500nsec internal circuit - response time approx.10 sec semiconductor ltd. data sheet 25
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function operational explanation (continued) (continued) for the XC6403b series, there are two types of toggle selection; one is a t-type flip-flop (t-ff) used for toggle operation whi ch can be reset internally by a signal directly from the voltage detector (vin sense type only. see also the selection guide on page 2). the other type is where the reset is applied internally through a one shot pulse circuit (vin, vrout type only. see also the selection guide on page 2). the type, which applies the reset directly via the signal from the voltage detector function, applies the voltage detector comp arator's output signal (reset signal) to the reset of t-ff reset, and turns the vr output off when the input voltage decreases below the detect voltage due t o battery consumption, etc.. in order to return the vr output, apply a voltage larger than the release voltage to vin and input a toggle signal to th e t-ff. in the case where input voltage is below the release voltage, the vr output does not return even though the toggle signal is input into the t-ff. the type which applies the reset signal to the t-ff internally via a one-shot pulse circuit changes the voltage detector compar ator output signal to a one- shot signal internally. like the type which applies the reset directly via the signal from voltage detector function, this type also applies the reset to the t- ff and sets the vr output to off when the input voltage (vin sense type) and output voltage (vrout sense type) drop below the d etect voltage level. this type can return the vr output by inputting a toggle signal, even when the sense pin voltage (vin or vrout pin voltage) is below the release voltage. please refer to the block diagram below and the timing chart on the following page. please choose the option suitable to the a pplication. block diagram for XC6403b series timing chart current on/off voltage reference vr circuit en v ss vr out v in r1 r2 t q r toggle ff r4 r3 1 shot vd out comp. vd error amp. power on clear for ff c fb optional toggle signal t-ff reset signal a b d c e f optional limit control pulse semiconductor ltd. data sheet 26
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function timing chart using the vd output level signal as the reset signal of t-ff (vd sense = vin pin) changing the vd output level signal into a one shot pulse to use t-ff as the reset signal (vd sense = vin pin) changing the vd output level signal into a one shot pulse to use t-ff as the reset signal (vd sense = vrout pin) toggle signal detect voltage release voltage lithium ion voltag e vin pin 4.2v vss vrout pin intrenal ic response time about 20usec vrout voltag e vss vin t-ff res et signal internal ic response time about 20u sec res et signal ( v d comp output signal) vss internal ic response time about 20usec vdout pin detec t l vss pull-up voltag e a b d e f toggle signal vin pin vrout pin t-ff res et signal vdout pin detec t l vrout voltag e pull-up voltag e detect voltage release voltage intrenal ic response time about 20usec internal ic response time internal ic response time about 20usec about 20usec lithium ion voltag e internal ic response time about 20usec 4.2v vss vss vin vss reset signal (1 shot pulse) vss c a d e f . semiconductor ltd. toggle signal vin pin vrout pin t-ff reset signal vdout pin detect l vrout voltage pull-up voltage detect voltage release voltage intrenal ic response time about 20usec internal ic response time internal ic response time about 20u sec about 20u sec lithium ion voltage internal ic response time about 20u sec reset signal ( 1 shot pulse) 4.2v vss vin vss vss c a d e f vss the circled letters correspond to those shown on the block diagram on page 26. data sheet 27
XC6403 series high speed ldo regulators, low esr cap. compatible, voltage detector function notes on use 1. please use this ic within the stated absolute maximum ratings. the ic is liable to malfunction should the ratings be exceede d. 2. where wiring impedance is high, operations may become unstable due to noise and/or phase lag depending on output current. please strengthen vin and vss wiring in particular. 3. please wire the input capacitor (cin) and the output capacitor (cl) as close to the ic as possible. should rapid input fluctuation or load fluctuation occur, please increase the capacitor value such as cin or cl to stabilize the operation. semiconductor ltd. data sheet 28

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