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xc6401 series dual ldo regulators, low esr cap. compatible november 7, 2003 ver. 4 preliminary ! low power consumption : 25 a (typ) ! applications ! dropout voltage : 30mv @ 30ma " mobile phones (pdc, gsm, cdma, imt2000 etc.) : 100mv @ 100ma " cordless phones and radio communication equipment ! output voltage range : 0.8 v to 5.0 v " portable games ! output current : more than 150 ma (300ma limit) " cameras, video recorders ! high ripple rejection rate : 70 db @ 1khz " portable av equipment ! low output noise " pdas ! low esr capacitor compatible ! general description ! features maximum output current : 150ma or more (300ma limit) dropout voltage : 100mv (iout=100ma) operating voltage range : 1.5v ~ 6.0v output voltage range : 0.8v ~ 5.0v (50mv step) highly accurate : 2% (vout>1.5v) : 30mv (vout 1.5v) low power consumption : 25 ma (typ.) standby current : less than 0.1 a (typ.) high ripple rejection : 70db (1khz) operating temperature range : -40 o c ~ +85 o c low esr capacitor compatible : ceramic capacitor ultra small packages : sot-26w usp-6b ! typical application circuits ! typical performance characteristics # cross talk v in 1 2 3 4 6 v ss v out1 v out2 en1 en2 5 c in 1uf c l2 1uf c l1 1uf 6 v out2 v out1 v ss en2 v in en1 5 4 1 2 3 c in 1uf c l1 1uf c l2 1uf the xc6401 series are highly accurate, dual, low noise, cmos ldo voltage regulators. performance features of the series includes low output noise, high ripple rejection ratio, low dropout and very fast turn-on times. the xc6401 includes a reference voltage source, error amplifiers, driver transistors, current limiters and phase compensators internally. the xc6401?s current limiters' foldback circuit also operates as a short protect for the output current limiter. the output voltage for each regulator is set independently by laser trimming. voltages are selectable in 50mv steps within a range of 0.8v to 5.0v. the xc6401 series is also fully compatible with low esr ceramic capacitors, reducing cost and improving output stability. this high level of output stability is maintained even during frequent load fluctuations, due to the excellent transient response performance and high psrr achieved across a broad range of frequencies. the en function allows the output of each regulator to be turned off independently, resulting in greatly reduced power consumption. the xc6401 series is available in the sot-26w or usp-6b ?chip- scale? package. 2.6 2.7 2.8 2.9 3.0 3.1 time (40usec/div) output voltage vout (v) 0 100 200 300 400 500 output current 1 iout (ma) 10ma 100ma xc6401 (vr1:3.0v, vr2:2.85v) vin=4.0v, cin= cl=1uf (ceramics) vr1 out p ut volta g e ( 3.0v ) vr2 out p ut volta g e ( 2.85v ) vr1 output current semiconductor ltd. data sheet 1
xc6401 series dual ldo regulators, low esr cap. compatible preliminary ! pin configuration ! pin assignment * a pin number 1 is under the marking of the leftmost of 4 digits. ! product classification " selection guide the following options for the regulator 1, 2, the en pin logic, internal pull-up / down are available. " ordering information xc6401 123456 regulator 1, en type active 'high' (pull-down resistor built in) active 'high' regulator 1 output voltage range : (no pull-down, resistor built in) 0.8 ~ 5.0 v active 'low' regulator 2 output voltage range : (pull-down resistor built in) 0.8 ~ 5.0 v active 'low' both 1 and 2 can be set 50 mv steps (no pull-down, resistor built in) packaging types regulator 2, en type active 'high' (pull-down resistor built in) active 'high' (no pull-down, resistor built in) device orientation active 'low' (pull-down resistor built in) active 'low' (no pull-down, resistor built in) description 34 01 ~ usp-6b internally set sequential number relating output voltage of each regulators sot-26w embossed tape: standard feed embossed tape: reverse feed description designator symbol 5 d m 6 designator symbol 1 2 e f g h h e r l pin number pin name function on/off control 1 31 6 power input on/off control 2 output 2 4 usp-6b 3 2 sot-26w 1 2 en1 vin en2 vout2 f g ground 6 5 vout1 output 1 4 vss 5 sot-26w (top view) usp-6b (top view) vout2 vout1 vss en2 vin en1 12 3 4 5 6 en2 vin en1 vss vout1 1 2 34 5 6 vout2 semiconductor ltd. data sheet 2
xc6401 series dual ldo regulators, low esr cap. compatible preliminary ! absolute maximum ratings ta = 25 o c ! electrical characteristics x c6401ffxx regulator 1, regulator 2 ta=25 o c note (note 1) vout(t)=specified output voltage (note 2) vout(e)=effective output voltage (i.e. the output voltage when "vout(t)+1.0v" is provided at the vin pin while maintaining a certain iout value). (note 3) vdif={vin1 (note5) -vout1 (note4) } (note 4) vout1=a voltage equal to 98% of the output voltage whenever an amply stabilized iout {vout(t)+1.0v} is input. (note 5) vin1=the input voltage when vout1 appears as input voltage is gradually decreased. (note 6) unless otherwise stated, vin=vout(t)+1.0v (note 7) if vout (t) 1.45v, min vout (t) - 30mv max vout (t) + 30mv a 0.10 a v 0.25 v4 4 ven vss -0.3 ~ vin +0.3 v iout1 + iout2 vout supply current iss vin=ven=vout (t) + 1.0v, iout=0ma output voltage (note 7) vout (e) load regulation dropout voltage ? vout vin=vout (t) + 1.0v ilim input voltage temperature characteristics ? topr ? vout vin=vout (t) + 1.0v, ven=vss iout=30ma, f=1khz -40 o c topr 85 o c en "low" current ienl storage temperature en "high" current ienh en "low" voltage venl current limiter short-circuit current line regulation vdif1 e-1 operating ambient temperature -55 ~ +125 conditions tstg -40 ~ +85 topr iout=30ma vin=vout (t) + 1.0v iout=30ma ? vout / iout=30ma iout=100ma 6.0 0.20 ? vin ? vout ? vout / vin vout(t)+1.0v vin 6.0v iout=30ma 25 45 0.01 0.98 2 1 1.5 a v % / v e-2 60 max v typ vout(t) 1.02 units standby current istb 150 maximum output current ioutmax 1ma iout 100ma vdif2 15 vin=ven=vout (t) + 1.0v, ven=vss ma 1 4 0.10 vin=ven=vout (t) + 1.0v vin=vout (t) + 1.0v, ven=vin 30 -0.10 4 -0.10 300 1.60 output voltage ripple rejection rate psrr en "high" voltage venh ishort vin=vout (t) + 1.0v, ven=vin 70 mv mv 1 db 5 ma vin a 1 100 1 3 ppm/ o c 0.01 0.10 parameter symbol 1 mv ma 1 circuit 1 min o c mw o c en pin voltage power dissipation sot-26w usp-6b pd 100 250 v ma 700 vss -0.3 ~ vin +0.3 output current output voltage units parameter input voltage ratings v 6.5 vin symbol semiconductor ltd. data sheet 3
xc6401 series dual ldo regulators, low esr cap. compatible preliminary ! dropout voltage 55 110 160 65 140 180 40 60 120 170 100 165 250 50 75 150 200 55 300 200 400 60 200 180 300 65 500 270 600 80 400 240 500 100 800 200 600 350 700 700 400 2.95 2.891 3.009 2.90 2.842 2.958 35 2.85 2.793 2.907 2.80 2.744 2.856 2.75 2.695 2.805 2.70 2.646 2.754 2.65 2.597 2.703 2.60 2.548 2.652 2.55 2.499 2.601 2.50 2.450 2.550 2.45 2.401 2.499 2.40 2.352 2.448 2.35 2.303 2.397 2.30 2.254 2.346 2.25 2.205 2.295 2.20 2.156 2.244 2.15 2.107 2.193 2.10 2.058 2.142 2.05 2.009 2.091 2.00 1.960 2.040 1.95 1.911 1.989 1.90 1.862 1.938 45 1.85 1.813 1.887 1.80 1.764 1.836 1.75 1.715 1.785 1.70 1.666 1.734 1.65 1.617 1.683 1.60 1.568 1.632 1.55 1.519 1.581 1.50 1.470 1.530 1.45 1.420 1.480 1.40 1.370 1.430 1.35 1.320 1.380 1.30 1.270 1.330 1.25 1.220 1.280 1.20 1.170 1.230 1.15 1.120 1.180 1.10 1.070 1.130 1.05 1.020 1.080 1.00 0.970 1.030 0.95 0.920 0.980 0.90 0.870 0.930 0.85 0.820 0.880 300 0.770 0.830 setting output voltage (v) vout (t) 0.80 vout vdif 1 vdif 2 output voltage (v) dropout voltage 1 e-1 (mv) dropout voltage 2 e-2 (mv) min. max. min. max. min. max. semiconductor ltd. data sheet 4
xc6401 series dual ldo regulators, low esr cap. compatible preliminary ! dropout voltage 30 4.95 4.851 5.049 5.00 4.900 5.100 4.85 4.753 4.947 4.90 4.802 4.998 4.845 4.80 4.704 4.896 150 4.65 4.557 4.743 4.70 4.606 4.794 4.55 4.75 4.655 4.459 4.641 4.60 4.508 4.692 4.45 4.361 4.539 4.50 4.410 4.590 4.35 4.263 4.437 4.40 4.312 4.488 4.25 4.165 4.335 4.30 4.214 4.386 4.15 4.067 4.233 4.20 4.116 4.284 4.05 3.969 4.131 4.10 4.018 4.182 3.95 3.871 4.029 4.00 3.920 4.080 3.85 3.773 3.927 3.90 3.822 3.978 3.75 3.675 3.825 3.80 3.724 3.876 3.65 3.577 3.723 3.70 3.626 3.774 3.55 3.479 3.621 3.60 3.528 3.672 3.45 3.381 3.519 3.50 3.430 3.570 3.35 3.283 3.417 3.40 3.332 3.468 3.25 3.185 3.315 3.30 3.234 3.366 3.15 3.087 3.213 3.20 3.136 3.264 3.05 2.989 3.111 3.10 3.038 3.162 max. 3.00 2.940 3.060 vout (t) min. max. min. 45 100 setting output voltage output voltage dropout voltage 1 dropout voltage 2 (v) e-1 (mv) e-2 (mv) (v) vout vdif 1 vdif 2 max. min. semiconductor ltd. data sheet 5
xc6401 series dual ldo regulators, low esr cap. compatible preliminary ! operational explanation output voltage control with the xc6401 series: low esr capacitors current limiter, short-circuit protection en pins ! note on use 1 please use this ic within the stated absolute maximum ratings. the ic is liable to malfunction should the ratings be exceeded. 2 where wiring impedance is high, operations may become unstable due to noise and/or phase lag depending on output current. please keep the resistance low between vin and vss wiring in particular. 3 please wire the input capacitor (cin) and the output capacitors (cl1, cl2) as close to the ic as possible. the ic's internal circuitry can be shutdown via the signal from the en1 and en2 pins with the xc6401 series. in shutdown mode, output at the vout1 and vout2 pins will be pulled down to the vss level via r11 & r12 and r21 & r22. the operational logic of the ic's en1 an d en2 pins are selectable (please refer to the selection guide on page 2). note that as the standard xc6401ff type's regulator 1 and 2 are both ' high active/no pull down', operations will become unstable with the en1 or en2 pins open. although the en1 and en2 pins are equal to an inverter input with cmos hysteresis, with either the pull-up or pull-down options, the en1 and en2 pins input current will increase when the ic is in operation. we suggest that you use this ic with either a vin voltage or a vss voltage input at the en1 and en2 pins. if this i c is used with the correct specifications for the en1 and en2 pins, the operational logic is fixed and the ic will operate normally. however, supp ly current may increase as a result of through current in the ic's internal circuitry. the voltage divided by resistors r1 & r2 is compared with the internal reference voltage by the error amplifier. the p-channel mosfets, which are connected to the vout1 and vout2 pins, are then driven by the subsequent output signal. the output voltages at the v out1 and vout2 pins are controlled and stabilized by a system of negative feedback. the current limit circuit and short protect circuit operate in relation to the level of output current. further, the ic's internal circuitry can be shutdown via the en pin's signal. with the xc6401 series, a stable output voltage is achievable even if used with low esr capacitors as a phase compensation circ uit is built-in. in order to ensure the effectiveness of the phase compensation, we suggest that output capacitors (cl1, cl2) is connected as close as possible to the output pins (vout1 and vout2) and the vss pin. please use an output capacitor with a capacitance value of at le ast 1 f. also, please connect an input capacitor (cin) of 0.1 f between the vin pin and the vss pin in order to ensure a stable power input. the xc6401 series includes a combination of a fixed current limiter circuit & a foldback circuit which aid the operations of th e current limiter and circuit protection. when the load current reaches the current limit level, the fixed current limiter circuit operates and outpu t voltage drops. as a result of this drop in output voltage, the foldback circuit operates, output voltage drops further and output current decreases . when the output pin is shorted, a current of about 30ma flows. current limit error a m p 1 on/off control vr1 each circuit vr2 each circuit voltage reference vout1 en1 en2 vin vss r11 r12 r21 r22 vout2 + - on/off control current limit + - error a m p 2 semiconductor ltd. data sheet 6
xc6401 series dual ldo regulators, low esr cap. compatible preliminary ! test circuits circuit 1 en1/en2 : active 'high' = en=vin active 'low' = en=vss circuit 2 en1/en2 : 1. active 'high' (pull-down resistor built-in) vr1 supply current iss1=i1 (note:en1=on, en2=off) vr2 supply current iss2=i1 (note:en1=off, en2=on) 2. active 'high' (pull-down, no resistor built-in) vr1 supply current iss1=i1 (note:en1=on, en2=off) vr2 supply current iss2=i1 (note:en1=off, en2=on) 3. active 'low' (pull-up resistor built-in) vr1 supply current iss1=i1+i2 (note:en1=on, en2=off) vr2 supply current iss2=i1+i3 (note:en1=off, en2=on) 4. active 'low' (pull-up, no resistor built-in) vr1 supply current iss1=i1 (note:en1=on, en2=off) vr2 supply current iss2=i1 (note:en1=off, en2=on) circuit 3 en1/en2 : active 'high' = en=vss active 'low' = en=vin v i out2 cin, cl1, cl2 : 1 f(ceramic) cl2 cl1 v i out1 cin v in v out1 v out2 en1 v ss en2 rl1 v rl2 a a a a a v in i out1 i out2 v in v out1 v out2 en1 v ss en2 a a i 3 i 2 i 1 cl2 cl1, cl2 : 1 f(ceramic) cl1 a v in v in v out1 v out2 en1 v ss en2 semiconductor ltd. data sheet 7
xc6401 series dual ldo regulators, low esr cap. compatible preliminary ! test circuits (continued) circuit 4 circuit 5 en1/en2 : active 'high' = en=vin active 'low' = en=vss v in v out1 v out2 en1 v ss en2 a v a v ven1 ven2 cin cin, cl1, cl2 :1 f(c eramic ) i out1 i out2 cl2 cl1 i out2 cl1, cl2 : 1 f(ceramic) cl2 cl1 i out1 v in =[v out (t)+1.0] v+0.5vp-pac v in v out1 v out2 en1 v ss en2 v v v semiconductor ltd. data sheet 8
xc6401 series dual ldo re g ulators, low esr ca p . com p atible preliminar y ! typical performance characteristics ( 1 ) out p ut volta g e vs. out p ut current 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0 50 100 150 200 250 300 350 output current iout (ma) output voltage vout (v) xc6401(2.85v) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0 50 100 150 200 250 300 350 output current iout (ma) output voltage vout (v) xc6401(2.85v) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0 50 100 150 200 250 300 350 output current iout (ma) output voltage vout (v) xc6401(3.0v) 0.0 0.2 0.4 0.6 0.8 1.0 0 50 100 150 200 250 300 350 output current iout (ma) output voltage vout (v) x c6401 ( 0.8 v ) 0.0 0.2 0.4 0.6 0.8 1.0 0 50 100 150 200 250 300 350 output current iout (ma) output voltage vout (v) xc6401 ( 0.8v ) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0 50 100 150 200 250 300 350 output current iout (ma) output voltage vout (v) xc6401(3.0 v ) vin=1.8v cin=1uf (ceramics), cl=1uf (ceramics) topr = 85 o c = 25 o c = - 40 o c vin=4.0v cin=1uf (ceramics), cl=1uf (ceramics) vin = 6.0v = 1.8v = 1.8v = 1.5v vin=4.0v cin=1uf (ceramics), cl=1uf (ceramics) vin = 6.0v = 4.0v = 3.15v vin=3.85v cin=1uf (ceramics), cl=1uf (ceramics) topr = 85 o c = 25 o c = - 40 o c vin=4.0v cin=1uf (ceramics), cl=1uf (ceramics) vin = 6.0v = 4.0v = 3..3v vin=4.0v cin=1uf (ceramics), cl=1uf (ceramics) topr = 85 o c = 25 o c = - 40 o c semiconductor ltd. data sheet 9
xc6401 series dual ldo re g ulators, low esr ca p . com p atible preliminar y ( 1 ) out p ut volta g e vs. out p ut current ( continued ) ( 2 ) out p ut volta g e vs. in p ut volta g e 0.65 0.70 0.75 0.80 0.85 0.90 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 input voltage vin (v) output voltage vout (v) xc6401(0.8v) 2.70 2.75 2.80 2.85 2.90 2.95 3.0 3.5 4.0 4.5 5.0 5.5 6.0 input voltage vin (v) output voltage vout (v) xc6401(2.85v) 2.05 2.25 2.45 2.65 2.85 3.05 2.35 2.85 3.35 input voltage vin (v) output voltage vout (v) xc6401(2.85v) 0.0 1.0 2.0 3.0 4.0 5.0 6.0 0 50 100 150 200 250 300 350 output current iout (ma) output voltage vout (v) xc6401(5.0v) 0.0 1.0 2.0 3.0 4.0 5.0 6.0 0 50 100 150 200 250 300 350 output current iout (ma) output voltage vout (v) xc6401 ( 5.0 v ) 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 0.5 1.0 1.5 2.0 2.5 input voltage vin (v) output voltage vout (v) xc6401 ( 0.8 v ) vin=6.0v cin=1uf (ceramics), cl=1uf (ceramics) topr = 85 o c = 25 o c = - 40 o c vin = 6.0v = 5.3v vin=4.0v cin=1uf (ceramics), cl=1uf (ceramics) topr = 25 o c cin=1uf (ceramics), cl=1uf (ceramics) iout = 0ma = 30ma = 100ma topr = 25 o c cin=1uf (ceramics), cl=1uf (ceramics) iout = 0ma = 30ma = 100ma topr = 25 o c cin=1uf (ceramics), cl=1uf (ceramics) iout = 0ma = 30ma = 100ma topr = 25 o c cin=1uf (ceramics), cl=1uf (ceramics) iout = 0ma = 30ma = 100ma semiconductor ltd. data sheet 10
xc6401 series dual ldo re g ulators, low esr ca p . com p atible preliminar y ( 2 ) out p ut volta g e vs. in p ut volta g e ( continued ) ( 3 ) dro p out volta g e vs. out p ut current 4.85 4.90 4.95 5.00 5.05 5.10 5.5 6.0 input voltage vin (v) output voltage vout (v) x c6401(5.0 v ) 2.85 2.90 2.95 3.00 3.05 3.10 3.5 4.0 4.5 5.0 5.5 6.0 input voltage vin (v) output voltage vout (v) xc6401(3.0v) 0.0 0.1 0.2 0.3 0.4 0.5 0 50 100 150 200 output current iout (ma) dropout voltage vdif (v) xc6401(2.85v) 2.2 2.4 2.6 2.8 3.0 3.2 2.5 3.0 3.5 input voltage vin (v) output voltage vout (v) xc6401(3.0v) 4.2 4.4 4.6 4.8 5.0 5.2 4.5 5.0 5.5 input voltage vin (v) output voltage vout (v) xc6401(5.0v) 0.0 0.2 0.4 0.6 0.8 1.0 0 50 100 150 200 output current iout (ma) dropout voltage vdif (v) xc6401(0.8v) topr = 25 o c cin=1uf (ceramics), cl=1uf (ceramics) iout = 0ma = 30ma = 100ma topr = 25 o c cin=1uf (ceramics), cl=1uf (ceramics) iout = 0ma = 30ma = 100ma iout = 0ma = 30ma = 100ma topr = 25 o c cin=1uf (ceramics), cl=1uf (ceramics) iout = 0ma = 30ma = 100ma cin=1uf (ceramics), cl=1uf (ceramics) topr = 85 o c = 25 o c = - 40 o c cin=1uf (ceramics), cl=1uf (ceramics) topr = 85 o c = 25 o c = - 40 o c semiconductor ltd. data sheet 11
xc6401 series dual ldo re g ulators, low esr ca p . com p atible preliminar y ( 3 ) dro p out volta g e vs. out p ut current ( continued ) 0 20 40 60 80 100 0123456 intput voltage vin (v) supply current iss (ua) xc6401(2.85v) 0 20 40 60 80 100 0123456 input voltage vin (v) supply current iss (ua) xc6401(5.0v) 0 20 40 60 80 100 0123456 input voltage vin (v) supply current iss (ua) xc6401(3.0v) 0 20 40 60 80 100 0123456 input voltage vin (v) supply current iss (ua) xc6401(0.8v) 0.0 0.1 0.2 0.3 0.4 0.5 0 50 100 150 200 output current iout (ma) dropout voltage vdif (v) xc6401(3.0v) 0.0 0.1 0.2 0.3 0.4 0.5 0 50 100 150 200 output current iout (ma) dropout voltage vdif (v) xc6401(5.0v) cin=1uf (ceramics), cl=1uf (ceramics) topr = 85 o c = 25 o c = - 40 o c cin=1uf (ceramics), cl=1uf (ceramics) topr = 85 o c = 25 o c = - 40 o c topr = 85 o c = 25 o c = - 40 o c topr = 85 o c = 25 o c = - 40 o c topr = 85 o c = 25 o c = - 40 o c topr = 85 o c = 25 o c = - 40 o c semiconductor ltd. data sheet 12
xc6401 series dual ldo re g ulators, low esr ca p . com p atible preliminar y ( 5 ) out p ut volta g e vs. ambient tem p erature ( 6 ) su pp l y current vs. ambient tem p erature 20 22 24 26 28 30 -50 -25 0 25 50 75 100 ambient temperature topr ( o c) output voltage vout (v) xc6401(2.85v) 2.75 2.80 2.85 2.90 2.95 -50 -25 0 25 50 75 100 ambient temperature topr ( o c) output voltage vout (v) xc6401(2.85v) 20 22 24 26 28 30 -50 -25 0 25 50 75 100 ambient temperature topr ( o c) output voltage vout (v) xc6401(0.8v) 4.80 4.90 5.00 5.10 5.20 -50 -25 0 25 50 75 100 ambient temperature topr ( o c) output voltage vout (v) x c6401 ( 5.0 v ) 2.90 2.95 3.00 3.05 3.10 -50 -25 0 25 50 75 100 ambient temperature topr ( o c) output voltage vout (v) xc6401(3.0v) 0.76 0.78 0.80 0.82 0.84 -50 -25 0 25 50 75 100 ambient temperature topr ( o c) output voltage vout (v) xc6401(0.8v) vin = 3.85v vin = 4.0v cin=1uf (ceramics), cl=1uf (ceramics) iout = 0ma = 10ma = 30ma = 100ma vin = 1.8v cin=1uf (ceramics), cl=1uf (ceramics) iout = 0ma = 10ma = 30ma = 100ma vin = 5.0v cin=1uf (ceramics), cl=1uf (ceramics) iout = 0ma = 10ma = 30ma = 100ma vin = 4.0v cin=1uf (ceramics), cl=1uf (ceramics) iout = 0ma = 10ma = 30ma = 100ma vin = 1.8v semiconductor ltd. data sheet 13
xc6401 series dual ldo re g ulators, low esr ca p . com p atible preliminar y ( 6 ) su pp l y current vs. ambient tem p erature ( continued ) 20 22 24 26 28 30 -50 -25 0 25 50 75 100 ambient temperature topr ( o c) output voltage vout (v) xc6401(5.0v) 20 22 24 26 28 30 -50 -25 0 25 50 75 100 ambient temperature topr ( o c) output voltage vout (v) xc6401(3.0v) vin = 4.0v vin = 6.0v semiconductor ltd. data sheet 14
xc6401 series dual ldo re g ulators, low esr ca p . com p atible preliminar y ( 7 ) in p ut transient res p onse 2.75 2.80 2.85 2.90 2.95 3.00 3.05 time (40usec/div) output voltage vout (v) 0 1 2 3 4 5 6 input voltage vin (v) xc6401(2.85v) 2.75 2.80 2.85 2.90 2.95 3.00 3.05 time (40usec/div) output voltage vout (v) 0 1 2 3 4 5 6 input voltage vin (v) xc6401(2.85v) 2.75 2.80 2.85 2.90 2.95 3.00 3.05 time (200usec/div) output voltage vout (v) 0 1 2 3 4 5 6 input voltage vin (v) xc6401(2.85v) 0.70 0.75 0.80 0.85 0.90 0.95 1.00 time (40usec/div) output voltage vout (v) -2 -1 0 1 2 3 4 input voltage vin (v) xc6401(0.8v) 0.70 0.75 0.80 0.85 0.90 0.95 1.00 time (40usec/div) output voltage vout (v) -2 -1 0 1 2 3 4 input voltage vin (v) xc6401(0.8v) 0.70 0.75 0.80 0.85 0.90 0.95 1.00 time (200usec/div) output voltage vout (v) -2 -1 0 1 2 3 4 input voltage vin (v) xc6401(0.8v) tr=tf=5use cl=1uf (ceramics), iout=100ua input voltage output voltage tr=tf=5use cl=1uf (ceramics), iout=30ma output voltage input voltage tr=tf=5use cl=1uf (ceramics), iout=100ma input voltage output voltage tr=tf=5use cl=1uf (ceramics), iout=100ua input voltage output voltage tr=tf=5use cl=1uf (ceramics), iout=100ma tr=tf=5use cl=1uf (ceramics), iout=30ma output voltage input voltage input voltage output voltage semiconductor ltd. data sheet 15
xc6401 series dual ldo re g ulators, low esr ca p . com p atible preliminar y ( 7 ) in p ut transient res p onse ( continued ) 4.90 4.95 5.00 5.05 5.10 5.15 5.20 time (40usec/div) output voltage vout (v) 2 3 4 5 6 7 8 input voltage vin (v) xc6401(5.0v) 4.90 4.95 5.00 5.05 5.10 5.15 5.20 time (40usec/div) output voltage vout (v) 2 3 4 5 6 7 8 input voltage vin (v) xc6401(5.0v) 4.90 4.95 5.00 5.05 5.10 5.15 5.20 time (200usec/div) output voltage vout (v) 2 3 4 5 6 7 8 input voltage vin (v) xc6401(5.0v) 2.90 2.95 3.00 3.05 3.10 3.15 3.20 time (40usec/div) output voltage vout (v) 0 1 2 3 4 5 6 input voltage vin (v) xc6401(3.0v) 2.90 2.95 3.00 3.05 3.10 3.15 3.20 time (40usec/div) input voltage vin (v) 0 1 2 3 4 5 6 input voltage vin (v) x c6401(3.0 v ) 2.90 2.95 3.00 3.05 3.10 3.15 3.20 time (200usec/div) output voltage vout (v) 0 1 2 3 4 5 6 input voltage vin (v) xc6401(3.0v) tr=tf=5use cl=1uf (ceramics), iout=100ua input voltage output voltage tr=tf=5use cl=1uf (ceramics), iout=30ma input voltage output voltage tr=tf=5use cl=1uf (ceramics), iout=100ua tr=tf=5use cl=1uf (ceramics), iout=100ma output voltage output voltage input voltage input voltage tr=tf=5use cl=1uf (ceramics), iout=30ma tr=tf=5use cl=1uf (ceramics), iout=100ma input voltage input voltage output voltage output voltage semiconductor ltd. data sheet 16
xc6401 series dual ldo re g ulators, low esr ca p . com p atible preliminar y ( 8 ) load transient res p onse 2.45 2.55 2.65 2.75 2.85 2.95 time (40usec/div) output voltage vout (v) 0 50 100 150 200 250 output current iout (ma) 10ma 100ma x c6401 ( 2.85v ) 2.45 2.55 2.65 2.75 2.85 2.95 time (40usec/div) output voltage vout (v) 0 50 100 150 200 250 output current iout (ma) 10ma 50ma xc6401(2.85v) 2.60 2.70 2.80 2.90 3.00 3.10 time (40usec/div) output voltage vout (v) 0 50 100 150 200 250 output current iout (ma) 10ma 100ma xc6401(3.0v) 2.60 2.70 2.80 2.90 3.00 3.10 time (40usec/div) output voltage vout (v) 0 50 100 150 200 250 output current iout (ma) 10ma 50ma xc6401(3.0v) 0.40 0.50 0.60 0.70 0.80 0.90 time (40usec/div) output voltage vout (v) 0 50 100 150 200 250 output current iout (ma) 10ma 100ma xc6401(0.8v) 0.40 0.50 0.60 0.70 0.80 0.90 time (40usec/div) output voltage vout (v) 0 50 100 150 200 250 output current iout (ma) 10ma 50ma xc6401(0.8v) vin=1.8v, tr=tf=5use cin=cl=1uf (ceramics) output current output voltage vin=1.8v, tr=tf=5use cin=cl=1uf (ceramics) output voltage output current vin=4.0v, tr=tf=5use cin=cl=1uf (ceramics) vin=4.0v, tr=tf=5use cin=cl=1uf (ceramics) output current output voltage output voltage output current vin=4.0v, tr=tf=5use cin=cl=1uf (ceramics) vin=4.0v, tr=tf=5use cin=cl=1uf (ceramics) output current output voltage output current output voltage semiconductor ltd. data sheet 17
xc6401 series dual ldo re g ulators, low esr ca p . com p atible preliminar y ( 8 ) load transient res p onse ( continued ) 4.60 4.70 4.80 4.90 5.00 5.10 time (40usec/div) output voltage vout (v) 0 50 100 150 200 250 output current iout (ma) 10ma 100ma x c6401(5.0 v ) 4.60 4.70 4.80 4.90 5.00 5.10 time (40usec/div) output voltage vout (v) 0 50 100 150 200 250 output current iout (ma) 10ma 50ma xc6401 ( 5.0 v ) vin=6.0v, tr=tf=5use cin=cl=1uf (ceramics) vin=6.0v, tr=tf=5use cin=cl=1uf (ceramics) output voltage output voltage output current output current semiconductor ltd. data sheet 18
xc6401 series dual ldo re g ulators, low esr ca p . com p atible preliminar y ( 9 ) ri pp le re j ection rate ( 10 ) cross talk 2.6 2.7 2.8 2.9 3.0 3.1 time (40usec/div) output voltage vout (v) 0 100 200 300 400 500 output current 1 iout (ma) 10ma 100ma xc6401 (vr1:3.0v, vr2:2.85v) xc6401(5.0v) 0 20 40 60 80 0.01 0.1 1 10 100 ripple frequency f (khz) ripple rejection rate rr (db) xc6401(3.0v) 0 20 40 60 80 0.01 0.1 1 10 100 ripple frequency f (khz) ripple rejection rate rr (db) xc6401(0.8v) 0 20 40 60 80 0.01 0.1 1 10 100 ripple frequency f (khz) ripple rejection rate rr (db) xc6401(2.85v) 0 20 40 60 80 0.01 0.1 1 10 100 ripple frequency f (khz) ripple rejection rate rr (db) vin=5.75v dc+0.5vp-pac iout=30ma, cl=1uf (ceramics) vin=1.8v dc+0.5vp-pac iout=30ma, cl=1uf (ceramics) vin=3.85v dc+0.5vp-pac iout=30ma, cl=1uf (ceramics) vin=4.0v dc+0.5vp-pac iout=30ma, cl=1uf (ceramics) vin=4.0v, cin= cl=1uf (ceramics) vr1 out p ut volta g e ( 3.0v ) vr2 out p ut volta g e ( 2.85v ) vr1 out p ut current semiconductor ltd. data sheet 19

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