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| 1/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. cmos ldo regulators fo r portable equipments 3ch cmos ldo regulators BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux description BU6650NUX, bu6651nux, bu6652nux, bu6653nux, bu6654nux, bu6655nux are high-performance 3ch full cmos regulator with 200-ma outputs, which is mounted on small package vson008x2030(2.0 mm ? 3.0 mm ? 0.6 mm). it has excellent noise characteristics and load responsiveness c haracteristics despite its low circuit current consumption of 120 ? a. it is most appropriate for various applications such as power supplies for logic ic, rf, and camera modules. features 1) high-accuracy output voltage of ? 1% ( ? 25 mv on 1.5 v & 1.8 v products) 2) high ripple rejection: 70 db (typ., 1 khz, vout Q 1.8 v) 3) compatible with small ceramic capacitor (cin=2.2 ? f, co=1.0 ? f) 4) low current consumption: 120 ? a 5) on/off control pin (stby) of output voltage 6) with built-in over current protection circuit and thermal shutdown circuit 7) with built-in output discharge circuit 8) adopting small package vson008x2030 applications battery-powered portable equipment, etc. line up matrix 200 ma bu665 nux series product name vout1 vout2 vout3 package BU6650NUX 2.8v 2.8v 1.8v vson008x2030 bu6651nux 2.8v 1.8v 1.5v bu6652nux 2.8v 2.8v 1.5v bu6653nux 2.8v 1.8v 1.8v bu6654nux 3.3v 1.8v 1.5v bu6655nux 3.3v 2.8v 1.8v no.11020eet06
technical note 2/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux absolute maximum rating parameter symbol ratings unit maximum applied power voltage vmax -0.3 ~ +6.0 v power dissipation pd 660* 1 mw maximum junction temperature tjmax +125 c operational temperature range topr -40 ~ +85 c storage temperature range tstg -55 ~ +125 c *1 pcb (70 mm ? 70 mm, thickness 1.6-mm glass epoxy) a standard rohm board is implemented. reduced to 6.6 mw/ ? c when used at ta=25 ? c or higher. recommended operating range (do not exceed pd.) parameter symbol ratings unit input power supply voltage v in 2.5 ~ 5.5 v maximum output current imax 200 ma recommended operating conditions parameter symbol ratings unit conditions min. typ. max. input capacitor c in 1.0* 2 2.2 f a ceramic capacitor is recommended. output capacitor c o 0.5* 2 1.0 f a ceramic capacitor is recommended. *2 set the capacity value of the capacitor so that it does not fall below the minimum value, taking temperature characteristics , dc device characteristics, and cha nge with time into consideration. technical note 3/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux electrical characteristics (ta=25 ? c, v in =v out +1.0 v (vin=3.5 v on vout=1.8 v and1.5 v products) , stby=1.5 v, c in =2.2 ? f, c o =1.0 ? f, unless otherwise specified) parameter symbol limits unit conditions min. typ. max. output voltage vout vout 0.99 vout vout 1.01 v iout=10 a, vout 2.5 v vout -25mv vout +25mv iout=10 a, vout<2.5 v operating current iin1 - 40 95 a iout=0ma stby1=1.5v, stby2=0v iin2 - 80 190 a iout=0ma stby2=1.5v, stby1=0v iin3 - 120 285 a iout=0ma stby3=1.5v circuit current (at stby) istby - - 1 a stby=0 v ripple rejection rr 55 70 - db vrr=-20dbv, frr=1khz, iout=10 ma 1.5 v Q vout Q 1.8 v 65 vrr=-20dbv, frr=1 khz, iout=10 ma 2.5 v Q vout input / output voltage difference vsat - 360 720 mv vout=2.8v (vin=0.98*vout, iout=200 ma) - 300 600 vout=3.3v (vin=0.98*vout, iout=200 ma) - 220 460 vout=3.3v (vin=0.98*vout, iout=150 ma) line regulation vdl - 2 20 mv vin=vout+1.0 v to 5.5 v, iout=10 a load regulation vdlo - 10 80 mv iout=0.01 ma to 100 ma over current protection detection current ilmax 220 350 700 ma vo=vout*0.8 output short-circuit current ishort 20 70 150 ma vo=0 v output discharge resistance rdsc 20 50 80 ? vin=4.0 v, stby=0 v standby pull down resistance rstb 500 1000 2000 k ? control voltage on vstbh 1.5 - 5.5 v output voltage on off vstbl -0.3 - 0.3 v output voltage off * this product does not have radiation-proof design. technical note 4/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux block diagram, recommended circuit diagram, and package dimensions (vson008x2030) pin configuration diagram pin no. pin name description 1 vin input pin 2 stby1 output1 control pin ( high : on, low : off ) 3 stby2 output2 control pin ( high : on, low : off ) 4 stby3 output3 control pin ( high : on, low : off ) 5 gnd ground pin 6 vout3 output3 pin 7 vout2 output2 pin 8 vout1 output1 pin device mark series name device mark a BU6650NUX u 6 6 5 0 bu6651nux u 6 6 5 1 bu6652nux u 6 6 5 2 bu6653nux u 6 6 5 3 bu6654nux u 6 6 5 4 bu6655nux u 6 6 5 5 stby vref ocp stby1 vout1 stby vref ocp stby2 vout2 stby vref ocp stby3 vout3 cout vin cin cout cout fig.1 block diagram fig.2 package dimensions lot no. device mark a technical note 5/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux fig.5 stability area characteristics (example) 0.01 0.1 1 10 100 0 50 100 150 200 iout [ma] esr [ ? ] stability area unstable area input/output terminal equi valent circuit schematic 6,7,8pin (vout) 5pin (gnd) 2,3,4pin (stby) 1pin (vin) v in stby fig.3 input / output equivalent circuit about input/outp ut capacitor it is recommended to place a capaci tor as close as possible to the pins between the input terminal and gnd or between the output terminal and gnd. the capacitor between the input terminal and gnd becomes valid when source impedance increases or when wiring is long. the larger the capacity of the out put capacitor between the output terminal and gnd is, the better t he stability and characteristics in output load fluctuation become. however, please check the status of actual implementation. ce ramic capacitors generally have variation, temperature characteri stics, and direct current bias characteristics and the capacity value also decreases with time depending on the usage conditions. it is recommended to select a ceramic capacitor upon inquiring about detailed data of the related manufacturer. about the equivalent series resistance (esr) of a ceramic capacitor capacitors generally have esr (equivalent series resistance) and it operates stably in the esr-iout area shown on the right. since ceramic capacitors, tantalum capacito rs, electrolytic capacitors, etc. generally have different esr, please check the esr of the capacitor to be used and use it within the stability area range shown in the right graph for evaluati on of the actual application. vout v in fig.4 capacity ? bias characteristics capacity value of ceramic capacitor - dc bias characteristics ( example ) -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 00.511.522.533.54 dc bias voltage [v] capacitance change [%] 10-v withstand voltag e b1char acter istics grm 188b11a105ka61d 10-v withstand voltag e b characteristics 6.3-v withstand voltag e b char acter istics 4-v withstand voltag e x6s characteristics 10-v withstand voltag e f char acter istics 10- v withstand voltag e f char acter istics technical note 6/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux fig. 11 output voltage fig. 12 line regulation reference data total device (ta=25oc unless otherwise specified.) reference data vo=3.3v (ta=25oc unless otherwise specified.) fig. 9 istby vs temp (stby) -0.100 0.000 0.100 0.200 0.300 0.400 0.500 0.600 0.700 0.800 0.900 1.000 -40 -15 10 35 60 85 temp. (c) gnd current (ua) vin=3.8v stby=0v fig. 6 iin1 vs. temp fig. 7 iin2 vs. temp fig. 8 iin3 vs. temp fig. 10 stby threshold 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 00.5 11.5 stby voltage (v) output voltage (v) vin=3.8v temp.=85c temp.=25c temp.=-40c 0.00 10.00 20.00 30.00 40.00 50.00 -40 -15 10 35 60 85 temp (c) input current (ua) 0.00 20.00 40.00 60.00 80.00 100.00 - 40 - 15 10 35 60 85 temp (c) input current (ua) 0.00 30.00 60.00 90.00 120.00 150.00 -40 -15 10 35 60 85 temp (c) input current (ua) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 00.511.522.533.544.555.5 vin voltage (v) output voltage (v) io=0ua io=100ua io=50ma io=200ma temp.=25c vin = stby 3.25 3.26 3.27 3.28 3.29 3.30 3.31 3.32 3.33 3.34 3.35 3.2 3.3 3.4 3.5 3.6 3.7 vin voltage (v) output voltage (v) io=0ua io=100ua io=50ma io=200ma temp=25c vin = stby 0 20 40 60 80 100 00.511.522.533.544.555.5 vin voltage (v) gnd current (ua) temp.=-40c temp.=25c temp.=85c io=0ua vin = stby 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0 0.05 0.1 0.15 0.2 output current (a) dropout voltage (v) vin=0.98 x vout stby = 1.5v temp.=-40c temp.=25c temp.=85c 0 2 4 6 8 10 00.51 1.522.533.54 4.555.5 v stby voltage (v) stby current (ua) vin = stby temp.=85c temp.=25c temp.=-40c 40 50 60 70 80 90 100 110 120 0 0.05 0.1 0.15 0.2 output current (a) gnd current (ua) vin = 4.3v stby = 1.5v temp.=85c temp.=25c temp.=-40c fig. 13 circuit current ignd fig. 15 stby input current fig. 16 iout - ignd fig. 14 dropout voltage technical note 7/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux 3.25 3.26 3.27 3.28 3.29 3.30 3.31 3.32 3.33 3.34 3.35 0 0.05 0.1 0.15 0.2 output current (a) output voltage (v) vin = 4.3v stby = 1.5v temp.=-40c temp.=25c temp.=85c 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 0 0.1 0.2 0.3 0.4 0.5 0.6 output current (a) output voltage (v) vin=5.5v stby = 1.5v temp=25 vin=4.3v vin=3.8v 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 00.5 11.5 stby voltage (v) output voltage (v) vin=4.3v temp.=85c temp.=25c temp.=-40c fig. 17 load regulation fig. 19 stby threshold fig. 18 ocp threshold fig. 22 ignd vs temp (stby) fig. 21 ignd vs temp fig. 20 vout vs temp 3.25 3.26 3.27 3.28 3.29 3.30 3.31 3.32 3.33 3.34 3.35 -40 -15 10 35 60 85 temp. (c) output voltage (v) vin= 4.3v stby=1.5v io=0.1ma 0.00 10.00 20.00 30.00 40.00 50.00 -40 -15 10 35 60 85 temp. ( c) gnd current (ua) vin=4.3v stby=1.5v io=0ma -0.100 0.000 0.100 0.200 0.300 0.400 0.500 0.600 0.700 0.800 0.900 1.000 -40 -15 10 35 60 85 temp. ( c) gnd current (ua) vin=4.3v stby=0v fig. 23 ripple rejection vs freq. fig. 24 ripple rejection vs vin fig. 25 output noise spectral density vs freq. 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 0.1 1 10 100 frequency f [khz] o utput noise density [ v/ hz] co=1.0f cin=1.0f iout=10ma temp=25 0 10 20 30 40 50 60 70 80 3.3 4.3 5.3 input voltage vin[v] ripple rejection [db] f=100khz f=10khz f=1khz f=0.1khz co=1.0f cin=none iout=10ma temp=25 0 10 20 30 40 50 60 70 80 0.1 1 10 100 1000 frequency (khz) ripple rejection (db) vin= 4.3v io=10ma ta = 25 fig. 26 load response fig. 27 load response technical note 8/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux fig. 28 load response fig. 29 load response fig. 30 load response current pulse=10khz fig. 31 load response current pulse=10khz fig. 32 load response current pulse=100khz fig. 33 load response current pulse=100khz technical note 9/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux fig. 34 start up time iout = 0ma fig. 35 start up time iout = 200ma fig. 36 start up time (stby=vin) iout = 0ma fig. 38 discharge time iout = 0ma fig. 39 vin response iout = 10ma fig. 37 start up time(stby=vin) iout = 200ma technical note 10/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux fig. 40 output voltage fig. 41 line regulation fig. 48 vout vs temp fig. 49 ripple rejection vs freq. fig. 50 ripple rejection vs vin fig. 51 output noise spectral density vs freq. reference data vo=2.8v (ta=25oc unless otherwise specified.) fig. 42 circuit current ignd fig. 44 stby input current fig. 45 iout - ignd fig. 46 load regulation fig. 47 ocp threshold fig. 43 dropout voltage 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 00.511.522.533.544.555.5 vin voltage (v) output voltage (v) temp.=25c io=0ua io= 100ua io=50ma io=200ma vin = stby 2.75 2.76 2.77 2.78 2.79 2.80 2.81 2.82 2.83 2.84 2.85 2.7 2.8 2.9 3 3.1 3.2 vin voltage (v) output voltage (v) temp.=25c io=0ua io=100ua io=50ma io=200ma vin = stby 0 20 40 60 80 100 00.511.522.533.544.555.5 vin voltage (v) gnd current (ua) temp.=-40c temp.=25c temp.=85c io=0ua vin = stby 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0 0.05 0.1 0.15 0.2 output current (a) dropout voltage (v) vi n= 0.98 x vout st by = 1.5v t emp. = -40c temp.=25c temp.=85c 0 2 4 6 8 10 00.511.522.5 33.544.555.5 stby voltage (v) stby current (ua) temp.=85c temp.=25c t emp. = -40c vin = stby 40 50 60 70 80 90 100 110 120 0 0.05 0.1 0.15 0.2 output currnt (a) gnd current (ua) vin = 3.8v stby = 1.5v t emp. = 85c temp.=25c t emp. = -40c 2.75 2.76 2.77 2.78 2.79 2.80 2.81 2.82 2.83 2.84 2.85 -40 -15 10 35 60 85 temp. (c) output voltage (v) vin= 3.8v stby=1.5v io=0.1ma 0 10 20 30 40 50 60 70 80 0.1 1 10 100 1000 frequency (khz) ripple rejection (db) vin= 3.8v io=10ma ta = 25 0 10 20 30 40 50 60 70 80 2.8 3.8 4.8 input voltage vin[v] ripple rejection [db] f=100khz f=10khz f=1khz f=0.1khz co=1.0f cin=none iout=10ma temp=25 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 0.1 1 10 100 frequency f [khz] output noise density [v/hz] co=1.0f cin=1.0f iout=10ma temp=25 output voltage (v) technical note 11/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux fig. 52 load response fig. 54 load response fig. 55 load response fig. 53 load response fig. 56 load response current pulse=10khz fig. 57 load response current pulse=10khz fig. 58 load response current pulse=100khz fig. 59 load response current pulse=100khz ? ? ? ? technical note 12/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux fig. 60 start up time iout = 0ma fig. 61 start up time iout = 200ma fig. 62 start up time (stby=vin) iout = 0ma fig. 64 discharge time iout = 0ma fig. 65 vin response iout = 10ma fig. 63 start up time(stby=vin) iout = 200ma technical note 13/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux fig. 66 output voltage fig. 67 line regulation fig. 75 vout vs. temp reference data vo=1.8v (ta=25oc unless otherwise specified.) fig. 68 circuit current ignd fig. 70 stby input current fig. 71 iout - ignd fig. 77 ignd vs. temp (stby) fig. 76 ignd vs. temp fig. 72 load regulation fig. 74 stby threshold fig. 73 ocp threshold fig. 69 circuit current ignd 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 00.511.522.533.544.555.5 vin voltage (v) output voltage (v) io=0ua io= 100ua io=50ma io=200ma temp=25c vin = stby 0 20 40 60 80 100 00.511.522.533.544.555.5 vin voltage (v) gnd current (ua) temp=-40c temp=25c temp=85c io=0ua vin = stby 0 20 40 60 80 100 120 140 00.511.522.533.544.555.5 vin voltage (v) gnd current (ua) io=200ma vin = stby temp=-40c temp=25c temp=85c 0 2 4 6 8 10 00.51 1.522.533.54 4.555.5 stby voltage (v) stby current (ua) vin = stby temp=85c temp=25c temp=-40c 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 00.5 11.5 stby voltage (v) output voltage (v) temp=85c temp=25c temp=-40c 1.75 1.76 1.77 1.78 1.79 1.80 1.81 1.82 1.83 1.84 1.85 -40 -15 10 35 60 85 temp (c) output voltage (v) vin= 3.5v stby=1.5v io=0.1ma 0.00 10.00 20.00 30.00 40.00 50.00 -40 -15 10 35 60 85 temp (c) input current (ua) vin=3.5v stby=1.5v io=0ma -0.100 0.000 0.100 0.200 0.300 0.400 0.500 0.600 0.700 0.800 0.900 1.000 -40 -15 10 35 60 85 temp (c) gnd current (ua) vin=3.5v stby=0v 1.75 1.76 1.77 1.78 1.79 1.80 1.81 1.82 1.83 1.84 1.85 1.75 1.85 1.95 2.05 2.15 2.25 2.35 vin voltage (v) output voltage (v) io=0ua io= 100ua io=50ma io=200ma temp=25c vin = stby 40 50 60 70 80 90 100 110 120 0 0.05 0.1 0.15 0.2 output current (a) gnd current (ua) vin = 3.5v stby = 1.5v temp=85c temp=25c temp= - 40c output voltage (v) output voltage (v) technical note 14/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux fig. 78 ripple rejection vs freq. fig. 79 ripple rejection vs vin fig. 80 output noise spectral density vs freq. fig. 81 load response fig. 83 load response fig. 84 load response fig. 82 load response fig. 85 load response current pulse=10khz fig. 86 load response current pulse=10khz ? 0 10 20 30 40 50 60 70 80 0.1 1 10 100 1000 frequency (khz) ripple rejection (db) vin= 3.5v io=10ma ta = 25 0 10 20 30 40 50 60 70 80 2.5 3.5 4.5 5.5 input voltage vin[v] ripple rejection [db] co=1.0f cin=none iout=10ma temp=25 f=100khz f=10khz f=1khz f=0.1khz 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.1 1 10 100 frequency f [khz] output noise density [v/hz] co=1.0f cin=1.0f iout=10ma temp=25 technical note 15/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux fig. 87 load response current pulse=100khz fig. 88 load response current pulse=100khz fig. 89 start up time iout = 0ma fig. 90 start up time iout = 200ma fig. 91 start up time (stby=vin) iout = 0ma fig. 93 discharge time iout = 0ma fig. 94 vin response iout = 10ma fig. 92 start up time(stby=vin) iout = 200ma ? technical note 16/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux fig. 95 output voltage fig. 96 line regulation fig. 104 vout vs. temp reference data vo=1.5v (ta=25oc unless otherwise specified.) fig. 97 circuit current ignd fig. 98 circuit current ignd fig. 99 stby input current fig. 100 iout - ignd fig. 106 ignd vs. temp (stby) fig. 105 ignd vs. temp fig. 101 load regulation fig. 103 stby threshold fig. 102 ocp threshold 0.0 0.3 0.6 0.9 1.2 1.5 1.8 00.511.522.533.544.555.5 vin voltage (v) output voltage (v) io=0ua io=100ua io=50ma io=200ma temp=25c vin = stby 1.45 1.46 1.47 1.48 1.49 1.50 1.51 1.52 1.53 1.54 1.55 1.25 1.35 1.45 1.55 1.65 1.75 1.85 1.95 2.05 2.15 2.25 vin voltage (v) output voltage (v) io=0ua io= 100ua io=50ma io=200ma temp= 25c vin = stby 0 20 40 60 80 100 00.511.522.533.544.555.5 vin voltage (v) gnd current (ua) temp=-40c temp=25c temp=85c io=0ua vin = stby 0 20 40 60 80 100 120 140 00.511.522.533.544.555.5 vin voltage (v) gnd current (ua) io=200ma vin = stby temp=-40c temp=25c temp=85c 0 2 4 6 8 10 00.51 1.522.533.54 4.555.5 stby voltage (v) stby current (ua) vin = stby temp=85c temp=25c temp=- 40c 40 50 60 70 80 90 100 110 120 0 0.05 0.1 0.15 0.2 output current (a) gnd current (ua) vin = 3.5v stby = 1.5v temp=85c temp=25c temp=-40c 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 00.5 11.5 stby voltage (v) output voltage (v) temp=85c temp=25c temp=-40c 1.45 1.46 1.47 1.48 1.49 1.50 1.51 1.52 1.53 1.54 1.55 -40 -15 10 35 60 85 temp (c) output voltage (v) vin= 3.5v stby=1.5v io=0.1ma 0.00 10.00 20.00 30.00 40.00 50.00 -40 -15 10 35 60 85 temp ( c) input current (ua) vin=3.5v stby=1.5v io=0ma -0.100 0.000 0.100 0.200 0.300 0.400 0.500 0.600 0.700 0.800 0.900 1.000 -40 -15 10 35 60 85 temp ( c) gnd current (ua) vin=3.5v stby=0v 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 0 0.1 0.2 0.3 0.4 0.5 0.6 output current (a) output voltage (v) vin=5.5v vin=2.0v vin=3.5v temp=25 stby=1.5v technical note 17/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux fig. 109 output noise spectral density vs. freq. fig. 108 ripple rejection vs. vin (iout=10 ma) fig. 107 ripple rejection vs. freq. fig. 114 load response current pulse=10 khz fig. 115 load response current pulse=10 khz fig. 110 load response fig. 111 load response fig. 112 load response fig. 113 load response 0 10 20 30 40 50 60 70 80 0.1 1 10 100 1000 frequency (khz) ripple rejection (db) vin= 3.5v io=10ma ta = 25 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.1 1 10 100 frequency f [khz] output noise density [ v/ hz] co=1.0f cin=1.0f iout=10ma temp=25 0 10 20 30 40 50 60 70 80 2.5 3.5 4.5 5.5 input voltage vin[v] ripple rejection [db] co=1.0f cin=none iout=10ma temp=25 f=100khz f=10khz f=1khz f =0.1khz technical note 18/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux fig. 119 start-up time iout = 200 ma fig. 120 start-up time (stby=vin) iout = 0 ma fig. 118 start-up time iout = 0 ma fig. 122 discharge time iout = 0 ma fig. 123 vin response iout = 10 ma fig. 121 startup time (stby=vin) iout = 200ma fig. 116 load response current pulse=100 khz fig. 117 load response current pulse=100 khz technical note 19/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux about power dissipation (pd) as for power dissipation, an approximate es timate of the heat reduction characteri stics and internal power consumption of ic are shown, so please use these for reference. since power dissipation changes substantially depending on the implementation conditions (board size, board thickness, metal wiring rate, number of layers and through holes, etc.), it is recommended to measure pd on a set board. exceeding the power dissipation of ic may lead to deterioration of the original ic performance, such as causing operation of the thermal shutdown circuit or reducti on in current capability. therefore, be sure to prepare sufficient margin within power dissipation for usage. calculation of the maximum inter nal power consumption of ic (p max ) p max =(v in -v out1 ) i out1 (max.) (v in -v out2 ) i out2 (max.) (v in -v out3 ) i out3 (max.) (v in : input voltage v out1,2,3 : output voltage i out (max) : maximum output current) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0 25 50 75 100 125 ta [ ] pd [w] 0.66w 85 * please design the margin so that p max becomes is than pd (p max ? pd) within the usage temperature range. - standard rohm board - size: 70 mm ? 70 mm ? 1.6 mm material : glass epoxy board fig.124 vson008x2030 power dissipation heat reduction characteristics (reference) technical note 20/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux other notes - about absolute maximum rating breakage may occur when absolute maximum ratings such as applied voltage and operating temperature range are exceeded. short mode or open mode cannot be specified at o ccurrence of a break, so please prepare physical safety measures (e.g., fuse) if such special mode in which the absolute maximum rating is exceeded can be assumed. - about gnd potential please be sure that the potential of the gnd terminal is the lowest in any operating condition. - about thermal design please provide thermal design with sufficient margin, taking power dissipation (pd) in actual usage conditions into consideration. - about short between pins and miss-attachment please be careful regarding the ic direction and misalignment at attachment onto a printed circuit board. miss-attachment may cause a break of ic. short caused by foreign matter between outputs, output and power supply, or gnd may also lead to a break. - about operation in a str ong electromagnetic field please note that usage in a strong electr omagnetic field may cause malfunction. - about common impedance please give due consideration to wiring of the power sour ce and gnd by reducing common-mode ripple or making ripple as small as possible (e.g., making the wiring as thick and short as possible, or reducing ripple by l ? c), etc. - about stby terminal voltage set stby terminal voltage to 0.3 v or less to put each channel into a standby state and to 1.5 v or more to put each channel into an operating state. do not fix stby terminal voltage to 0.3 v or more and 1.5 v or less or do not lengthen the transition time. this may cause malfunction or failure. when shorting the vin terminal and stby termi nal for usage, the status will be ?stby=vin low? at turning the power off, and discharge of the vout term inal cannot operate, which means voltage may remain for a certain time in the vout terminal. since turning the power on again in this state may cause overshoot, turn the power on for use after the vout terminal is completely discharged. - about over current protection circuit output has a built-in over current protection circuit, which prevents ic break at load short. note that this protection circuit is effective for prevention of breaks due to unexpected accidents. please avoid us age by which the protection circuit operates continuously. - about thermal shutdown output is off when the thermal circuit operates since a tem perature protection circuit is built in to prevent thermal breakdown. however, it recovers when the temperature returns to a certain temperature. t he thermal circuit operates at emergency such as overheating of ic. sinc e it is prepared to prevent ic breakdown, please do not use it in a state in which protection works. - about reverse current for applications on which reverse current is assumed to flow into ic, it is recommended to prepare a path to let the current out by putting a bypass diode between the v in -v out terminals. - about testing on a set board when connecting a capacitor to a terminal with low impedance for testing on a set board, please be sure to discharge for each process since ic may be stressed. as a countermeasure against static el ectricity, prepare grounding in the assembly process and take sufficient care in transportation and storage. in addition, when connecting a capacitor to a jig in a testing process, please do so after turning the power off and remove it after turning the power off. fig.125 example of bypass diode connection reverse current vin gnd stby out technical note 21/21 www.rohm.com 2011.03 - rev.e ? 2011 rohm co., ltd. all rights reserved. BU6650NUX,bu6651nux,bu6652nux,bu6653nux,bu6654nux,bu6655nux ordering part number b u 6 5 5 0 n u x - t r part no. part no. 6650 6651 6652 6653 6654 6655 package nux: vson008x2030 packaging and forming specification tr: embossed tape and reel (unit : mm) vson008x2030 5 1 8 4 1.4 0.1 0.25 1.5 0.1 0.5 0.3 0.1 0.25 +0.05 ?0.04 c0.25 1.0max (0.22) 0.02 +0.03 ?0.02 3.0 0.1 2.0 0.1 1pin mark 0.08 s s ? order quantity needs to be multiple of the minimum quantity. r1120 a www.rohm.com ? 2011 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes no copying or reproduction of this document, in part or in whole, is permitted without the consent of rohm co.,ltd. the content specied herein is subject to change for improvement without notice. the content specied herein is for the purpose of introducing rohm's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specications, which can be obtained from rohm upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specied in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, rohm shall bear no responsibility for such damage. the technical information specied herein is intended only to show the typical functions of and examples of application circuits for the produc ts. rohm does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by rohm and other parties. rohm shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specied in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, ofce-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specied in this document are not designed to be radiation tolerant. while rohm always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, re or any other damage caused in the event of the failure of any product, such as derating, redundancy, re control and fail-safe designs. rohm shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel- controller or other safety device). rohm shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specied herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law. |
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