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BU33DV7NUX product structure silicon monolithic integrated circuit this product is not designed prot ection against radioactive rays. . 1/24 tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 14 ? 001 www.rohm.com datashee t 1.8v to 5.5v, 300ma 1ch synchronous boost dc/dc converter BU33DV7NUX general description the BU33DV7NUX devices provide a power supply solution for products powered by either two-cell alkaline, nicd or nimh, or one-cell li-ion or li-polymer battery. output currents can go as high as 300ma while using two alkaline, and discharge it down to 1.8 v. with the mode pin, the BU33DV7NUX provides mode selection of pwm control or pfm/pwm automatic switching control. when lo ad current is large, the product switches automatically to the pwm mode so that high efficiency is achievable over a wide range of load conditions. the maximum peak current in the boost switch is typically limited to a value of 1.85a. BU33DV7NUX output voltage is fixed by an internal resistor divider. when vin voltage is higher than 3.3 v, vout is connected with vin. features ? synchronous boost dc/dc converter(pfm/pwm) 300ma @vout=3.3v, vin=1.8v ? fixed output voltage (3.3v) ? pass-through function1 (vin > vout<3.3v>) ? thermal shutdown ? vson010x3030 (small package) key specifications input voltage range: 1.8v to 5.5v output voltage range: 3.23v to 3.37v output current: 300ma (max.) switching frequency: 0.6mhz (typ.) pch fet on resistance: 160m ? (typ.) nch fet on resistance: 90m ? (typ.) standby current (mode=0v): 4.5a (max.) standby current (mode=vin): 1.5a (max.) operating temperature range: -40 to+85 available features with mode=0v ? pass-through function2 during en-off ? disconnect function during uvlo ? uvlo-detect voltage:1.8v(typ) ? uvlo-release voltage:2.0v(typ) ? pwm(switching frequency 600khz) available features with mode=vin ? disconnect function during en-off and uvlo ? uvlo-detect voltage:1.8v(typ) ? uvlo-release voltage:2.0v(typ) ? pfm/pwm(switching frequency to 600khz) applications ? two-cell alkaline, nicd or nimh or single-cell li battery-powered products ? portable audio players ? pda ? cellular phones ? personal medical products package 10-pin small ?vson010x3030? package. <3.1mm (typ.) x 3.1mm (typ.) x 0.6mm (max.)> vson010x3030 typical application circuit typical performance characteristics figure 1. application circuit figure 2. efficiency c1 en agnd comp rstbc vout vin mode rstbo sw pgnd l1 c3 out c2 r1 c4 necessary at pfm efficiency temp=25 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 0.1 1 10 100 1000 iout [ma] efficiency [%] pfm2.4v pwm2.4v pwm1.8v pfm1.8v
datasheet d a t a s h e e t . 2/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com absolute maximum ratings(ta=25 ) parameter symbol ratings unit condition maximum applied voltage vmax 7.0 v power dissipation1 pd1 464 (note1) mw 1layer(74.2x74.2mm)board (surface heat radiation copper foil 6.28mm ) power dissipation2 pd2 1440 (note2) mw 4layer(74.2x74.2mm)board (1,4layer heat radiation copper foil 6.28mm ) (2,3layer heat radiation copper foil 5500mm ) operating temperature r ange topr -40 to +85 o c storage temperature range tstr -55 to +125 o c *1 when it is used by more than ta=25 , it is reduced by 4.64mw/ . *2 when it is used by more than ta=25 , it is reduced by 14.4mw/ . operating conditions parameter symbol ratings unit condition power supply voltage range vcc 1.8 to 5.5 v vin terminal voltage electrical characteristics [bu34dv7nux] (unless otherwise specified ta=25 vin=2.4v) parameter symbol min. ty p. max. unit condition circuit current1(en=0v) icc1a - 1.6 4.5 a en=0v,mode=0v circuit current2(en=0v) icc2a - 0.3 1.5 a en=0v,mode=vin circuit current1 no switching (en=vin,vout=5v) icc1b - 140 250 a en=vin,mode=0v, vout=5.0v (not include sw) circuit current2 no switching (en=vin,vout=5v) icc2b - 25 50 a en=vin,mode=vin, vout=5.0v (not include sw) circuit current1(en=vin) icc1c - 3. 5 - ma en=vin,mode=0v, io=0ma circuit current2(en=vin) icc2c - 30 - a en=vin,mode=vin, io=0ma oscillation frequency fsw 0.5 0.6 0.7 mhz output voltage range vout 3.23 3.3 3.37 v io=1ma current limit ilim 1.4 1.85 2.2 a dc - current en input high vih_en 0.9 - - v en input low vil_en - - 0.2 v mode input high vih_mode 0.9 - - v mode input low vil_mode - - 0.2 v rstbo output low voltage vrstol - 0.1 0.2 v ioi=100ua,mode=0v rstbo output high voltage vrstoh vi n-0.2 vin-0.1 - v ioi=-100ua,mode=0v rstbc output resistance rrstbc 450 600 750 k ? swn1 switch on resistance rswn1 - 90 - m ? vout=3.3v swp1 switch on resistance rswp1 - 160 - m ? swn2 switch on resistance rswn2 - 1.0 - k ? mode=vin,en=0v swp2 switch on resistance rswp2 - 60 - ? mode=0v,en=0v uvlo release threshold vuvlor 1.9 2.0 2.1 v vin rising uvlo detect threshold vuvlod 1.75 1.8 1.85 v vin falling uvlo hysteresis vuvlohys - 0.2 - v vin thru vinthru 3.2 3.3 3.4 v vin thru hysteresis vinthruhys 20 50 80 mv 2 2 2 2
datasheet d a t a s h e e t . 3/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com block diagram figure 3. circuit block mode input pin function sw-on/off mode pin en pin uvlo uvlo release voltage dc/dc-control pwm or pfm/pwm rstbo swp2 swn2 swn3 swp1 swn1 0v 0v on 2.0v(typ) - 0v on off off off off 0v vin on 2.0v(typ) pwm while soft start : 0v after soft start : vin off off on switching switching vin 0v off - - 0v off on off off off vin vin on 2.0v(typ) pfm/pwm while soft start : 0v after soft start : vin off off on switching switching pin configuration symbol pin no. function terminal circuit vin 1 power supply input c sw 2 inductor connection terminal c comp 3 phase compensation pin a mode 4 function select pin c rstbo 5 soft start output pin while soft start : low(gnd) after soft start : high(vin) a en 6 en=vin: power-on en=gnd: power-off c rstbc 7 low battery detect delay pin a agnd 8 gnd b pgnd 9 gnd b vout 10 boost voltage output pin c don?t use en pin and mode pin at open. input-output equivalent circuit i/o equivalent circuit diagram is as follows. (unit : mm) vson010x3030 5 1 10 6 2.0 0.1 0.6max 1pin mark 0.4 0.1 0.25 +0.05 -0.04 0.5 3.0 0.1 (0.12) 0.5 3.0 0.1 -0.02 +0.03 0.02 c0.25 1.2 0.1 s s 0.08 figure 4. package vin swn2 s w soft start delay + - control logic tsd osc + - level shift driver vin mode en rstbc rstbo comp agnd pgnd sw vout vin swn3 swp2 swp1 swn1 uvlo
datasheet d a t a s h e e t . 4/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com electrical characteristic curves (reference data) ? quiescent current en=off icc pwm 0 1 2 3 4 5 6 7 8 01234567 vin [v] icc [ a] output voltage en=off pwm 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 01234567 vin [v] vout[v] figure 5. quiescent current pwm figure 6. out put voltage (en=off) pwm ta = - 4 0 ta = 2 5 ta = 8 5 ta = - 4 0 ta = 2 5 ta = 8 5
datasheet d a t a s h e e t . 5/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com electrical characteristic curves (reference data) - continued ? quiescent current - continued ? frequency output voltag e en=o ff pfm 0.00 0.05 0.10 0.15 0.20 0.25 01234567 vin [v] vout[v] en=off icc pfm 0 1 2 3 4 5 6 7 8 01234567 vin [v] icc [ a] frequency 500 550 600 650 700 750 800 1.5 2 2.5 3 3.5 vin [v] freq [khz] figure 9. frequency figure 7. quiescent current pfm figure 8. out put voltage (en=off) pfm ta = - 4 0 ta = 2 5 ta = 8 5 ta = - 4 0 ta = 2 5 ta = 8 5 ta = - 4 0 ta = 2 5 ta = 8 5
datasheet d a t a s h e e t . 6/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com electrical characteristic curves (reference data) - continued ? efficiency ef fic iency vin=2.4v 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 0.1 1 10 100 1000 iout [ma] efficiency [%] ef fic iency vin=1.8v 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 0.1 1 10 100 1000 iout [ma] efficiency [%] ef fic iency vin=3.2v 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 0.1 1 10 100 1000 iout [ma] efficiency [%] figure 10. efficiency pwm vin=1.8v figure 11. efficiency pwm vin=2.4v figure 12. efficiency pwm vin=3.2v ta = - 4 0 ta = 2 5 ta = 8 5 ta = - 4 0 ta = 2 5 ta = 8 5 ta = - 4 0 ta = 2 5 ta = 8 5
datasheet d a t a s h e e t . 7/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com electrical characteristic curves (reference data) - continued ? efficiency - continued efficiency vin=3.2v 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 0.1 1 10 100 1000 iout [ma] efficiency [%] ef fic iency vin=1.8v 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 0.1 1 10 100 1000 iout [ma] efficiency [%] figure 13. efficiency pfm vin=1.8v figure 14. efficiency pfm vin=2.4v figure 15. efficiency pfm vin=3.2v ta = - 4 0 ta = 2 5 ta = 8 5 efficiency vin=2.4v 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 0.1 1 10 100 1000 iout [ma] efficiency [%] ta = - 4 0 ta = 2 5 ta = 8 5 ta = - 4 0 ta = 2 5 ta = 8 5
datasheet d a t a s h e e t . 8/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com electrical characteristic curves (reference data) - continued ? load regulation load regulation vin=1.8v 3.20 3.25 3.30 3.35 3.40 0 50 100 150 200 250 300 iout [ma] vout [v] load regulation vin=2.4v 3.20 3.25 3.30 3.35 3.40 0 50 100 150 200 250 300 iout [ma] vout [v] load regulation vin=3.2v 3.20 3.25 3.30 3.35 3.40 0 50 100 150 200 250 300 iout [ma] vout [v] figure 16. load regulation pwm vin=1.8v figure 17. load regulation pwm vin=2.4v figure 18. load regulation pwm vin=3.2v ta = - 4 0 ta = 2 5 ta = 8 5 ta = - 4 0 ta = 2 5 ta = 8 5 ta = - 4 0 ta = 2 5 ta = 8 5
datasheet d a t a s h e e t . 9/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com electrical characteristic curves (reference data) ? continued ? load regulation - continued load regulation vin=1.8v 3.30 3.35 3.40 3.45 3.50 0 50 100 150 200 250 300 iout [ma] vout [v] figure 19. load regulation pfm vin=1.8v figure 20. load regulation pfm vin=2.4v figure 21. load regulation pfm vin=3.2v load regulation vin=2.4v 3.30 3.35 3.40 3.45 3.50 0 50 100 150 200 250 300 iout [ma] vout [v] load regulation vin=3.2v 3.30 3.35 3.40 3.45 3.50 0 50 100 150 200 250 300 iout [ma] vout [v] ta = - 4 0 ta = 2 5 ta = 8 5 ta = - 4 0 ta = 2 5 ta = 8 5 ta = - 4 0 ta = 2 5 ta = 8 5
datasheet d a t a s h e e t . 10/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com electrical characteristic curves (reference data) - continued ? rise figure 22. rise [en : off=>on] pwm vin=2.4v io=0ma ch1:vout 500mv/di v ch2:en 2.0v/di v ch3:rstbo 1.0v/di v ch4:icoi l 200ma/di v ch1:vout 500mv/di v ch2:en 2.0v/di v ch3:rstbo 1.0v/di v ch4:icoi l 200ma/di v ch1:vout 500mv/d i v ch2:en 2.0v/di v ch3:rstbo 1.0v/d i v ch4:icoi l 200ma/d i v figure 23. rise [en : off=>on] pfm vin=2.4v io=0ma figure 24. rise [en : off=>on] pwm vin=3.2v io=0ma figure 25. rise [en : off=>on] pfm vin=3.2v io=0ma ch1:vout 500mv/di v ch2:en 2.0v/di v ch3:rstbo 1.0v/di v ch4:icoi l 200ma/di v
datasheet d a t a s h e e t . 11/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com electrical characteristic curves (reference data) - continued ? rise - continued figure 26. rise [en : off=>on] pwm vin=5.5v io=0ma figure 27. rise [en : off=>on] pfm vin=5.5v io=0ma ch1:vout 1.0v/div ch2:en 2.0v/div ch3:rstbo 2.0v/div ch4:icoil 20ma/div ch1:vout 1.0v/div ch2:en 5.0v/div ch3:rstbo 2.0v/div ch4:icoil 200ma/div
datasheet d a t a s h e e t . 12/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com electrical characteristic curves (reference data) - continued ? fall ch1:vout 500mv/di v ch2:en 2.0v/di v ch3:rstbo 1.0v/di v ch4:icoi l 200ma/d i v ch1:vout 500mv/di v ch2:en 2.0v/di v ch3:rstbo 1.0v/di v ch4:icoi l 200ma/di v figure 28. fall [en : on=>off] pwm vin=2.4v io=0ma figure 29. fall [en : on=>off] pfm vin=2.4v io=0ma figure 30. fall [en : on=>off] pwm vin=3.2v io=0ma figure 31. fall [en : on=>off] pfm vin=3.2v io=0ma ch1:vout 500mv/di v ch2:en 2.0v/di v ch3:rstbo 1.0v/di v ch4:icoi l 200ma/di v ch1:vout 500mv/di v ch2:en 2.0v/d i v ch3:rstbo 1.0v/di v ch4:icoi l 200ma/d i v
datasheet d a t a s h e e t . 13/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com electrical characteristic curves (reference data) ? continued ? fall - continued figure 32. fall [en : on=>off] pwm vin=5.5v io=0ma figure 33. fall [en : on=>off] pfm vin=5.5v io=0ma ch1:vout 1.0v/d i v ch2:en 5.0v/d i v ch3:rstbo 2.0v/d i v ch4:icoi l 200ma/d i v ch1:vout 1.0v/d i v ch2:en 5.0v/di v ch3:rstbo 2.0v/di v ch4:icoi l 200ma/di v
datasheet d a t a s h e e t . 14/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com electrical characteristic curves (reference data) - continued ? io change pwm ch1:vout 100mv/di v ch4:icoi l 100mv/di v ch1:vout 100mv/di v ch4:icoi l 100mv/d i v ch1:vout 100mv/di v ch4:icoi l 100mv/di v ch1:vout 100mv/di v ch4:icoi l 100mv/di v figure 34. io change pwm 1ma=>100ma vin=1.8v figure 35. io change pwm 100ma=>1ma vin=1.8v figure 36. io change pwm 1ma=>100ma vin2.4v figure 37. io change pwm 100ma=>1ma vin=2.4v
datasheet d a t a s h e e t . 15/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com electrical characteristic curves (reference data) ? continued ? io change pwm - continued ch1:vout 100mv/di v ch4:icoi l 100mv/di v ch1:vout 100mv/di v ch4:icoi l 100mv/di v figure 38. io change pwm 1ma=>100ma vin=3.2v figure 39. io change pwm 100ma=>1ma vin=3.2v
datasheet d a t a s h e e t . 16/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com electrical characteristic curves (reference data) - continued ? io change pfm ch1:vout 100mv/di v ch4:icoi l 100mv/di v ch1:vout 100mv/d i v ch4:icoi l 100mv/d i v ch1:vout 200mv/di v ch4:icoi l 100mv/di v ch1:vout 200mv/di v ch4:icoi l 100mv/d i v figure 40. io change pfm 1ma=>100ma vin=1.8v figure 41. io change pfm 100ma=>1ma vin=1.8v figure 42. io change pfm 1ma=>100ma vin2.4v figure 43. io change pfm 100ma=>1ma vin=2.4v
datasheet d a t a s h e e t . 17/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com electrical characteristic curves (reference data) ? continued ? io change pfm - continued ch1:vout 100mv/d i v ch4:icoi l 100mv/di v ch1:vout 100mv/di v ch4:icoi l 100mv/di v figure 44. io change pfm 1ma=>100ma vin=3.2v figure 45. io change pfm 100ma=>1ma vin=3.2v
datasheet d a t a s h e e t . 18/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com notes - load current 300ma (max) timing of possible load 300ma (max) is dueling rstbo ?h?. -en: on<=>off pfm (mode=vin) vin connect to vout at rswp2 mo de=vin. please note drop of vout. ch1:vout 500mv/di v ch2:en 2.0v/di v ch3:rstbo 1.0v/di v ch4:icoi l 200ma/di v thru mode soft start vout:500mv/div en:500mv/div 300ma (max) vout drop figure 47. en : l=>h pfm io=5ma vin=3.6v figure 46. load current 300ma timing vout = vin - (iout x rswp2) t = time thru mode en vout = 3.31-exp(-t/)) dv/dt = -iout/cout vout soft start vout drop
datasheet d a t a s h e e t . 19/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com how to select parts of application ? pwm ? pfm parts no. name value style(vendor) l1 inductance 6.8h vlf504015m-6r8m(tdk), lqh44pn6r8mp0l(murata) c1 capacitor 10f x7r,x5r ceramic c2 capacitor 22f x7r,x5r ceramic c3 capacitor 470pf x7r,x5r ceramic parts no. name value style(vendor) l1 inductance 6.8uh vlf504015m-6r8m(tdk), lqh44pn6r8mp0l(murata) c1 capacitor 10f x7r,x5r ceramic c2 capacitor 22f x7r,x5r ceramic c3 capacitor 470pf x7r,x5r ceramic c4 capacitor 4.7f - r1 resister 10 ? - en agnd comp rstbc vout vin mode rstbo sw pgnd l1 c1 c3 out c2 en agnd comp rstbc vout vin mode rstbo sw pgnd l1 c1 c3 out c2 r1 c4
datasheet d a t a s h e e t . 20/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com notes of board layout BU33DV7NUX is switching dcdc converter, so characteristics of noise and etc changing by board layout. please note the following respect besides a general board layout matter when you make pcb. about heat loss in the heat design, please operate it in the following condition. (please consider the margin etc. because the fo llowing temperature is a guarantee temperature.) 1. surrounding temperature ta must be 85 or less. 2. loss of ic must be permi ssible loss pd or less. the allowable dissipation (pd) characteristics are described below. 1.4 1.6 1.8 2.0 2.1 1.2 1.0 0.8 0.4 0.2 0 0 255075100125 temparature() 1layer(74.2 74.2mm board (surface heat radiation copper foil 6.28mm 4layer(74.2 74.2mm board (1,4layer heat radiation copper foil 6.28mm (2,3layer heat radiation copper foil 5500mm ) 2 2 2
datasheet d a t a s h e e t . 21/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com caution on use 1 absolute maximum ratings an excess in the absolute maximum rating, such as supply voltage, temperature range of operating conditions, etc., can break down devices, thus making impossible to identify breaking mode such as a short circuit or an open circuit. if any special mode exceeding the absolute maximum ratings is assumed, consideration should be given to take physical safety measures including the use of fuses, etc. 2 the power supply and the gnd lines design pcb pattern to provide low impedance for the wiring between the power supply and the gnd lines. please take care about interference by common impe dance of the wiring pattern when there are two or more power supply and gnd line. for the gnd line, please note the separation of t he large current route and the small signal route including the external circuit.furthermore, for all power supply terminal s to ics; mount a capacitor between the power supply and the gnd terminal. at the same time, in order to use an electrolytic capacitor, thoroughly check to be sure the characteristics of the capacitor to be used present no problem including the o ccurrence of capacity dropout at a low temperature, thus determining the constant. 3 gnd voltage make setting of the potential of the gnd terminal so that it will be maintained at the minimum in any operating state. 4 short circuit between terminals and erroneous mounting in order to mount ics on a set pcb, pay thorough attention to the direction and offset of the ics. erroneous mounting can break down the ics. furthermore, if a short circuit occurs due to foreign matters entering between terminals or between the terminal and the power supply or the gnd terminal, the ics can break down. 5 operation in strong electromagnetic field be noted that using ics in the strong el ectromagnetic field can malfunction them. 6 input terminals in terms of the construction of ic, parasitic elements are inev itably formed in relation to potential. the operation of the par asitic element can cause interference with circuit operation, thus resulting in a malfunction and then breakdown of the input terminal . therefore, pay thorough attention not to handle the input terminals, such as to apply to the input terminals a voltage lower th an the gnd respectively, so that any parasitic element will operat e. furthermore, do not apply a voltage to the input terminals wh en no power supply voltage is applied to the ic. in addition, even if the power supply voltage is applied, apply to the input term inals a voltage lower than the power supply voltage or within the guaranteed value of elec trical characteristics. 7 external capacitor in order to use a ceramic capacitor as the external capaci tor, determine the constant wi th consideration given to a degradation in the nominal capacitance due to dc bias and c hanges in the capacitance due to temperature, etc. 8 thermal design perform thermal design in which there are adequate margins by taking into account the permissible dissipation (pd) in actual states of use. moreover, please use it within th e range where output tr doesn't exceed the rated voltage and aso.
datasheet d a t a s h e e t . 22/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com caution on use- continued 9 rush current in cmos ic, when the power supply is turned on rush current might flow momentarily in logical internal irregular state. therefore, note drawing the capacity of the power supply coupling, the power supply, and width and drawing the gnd pattern wiring, please. 10 test terminal and unused terminal processing please process a test terminal and unused terminal according to explanations of the functi on manual and the application note, etc. to be unquestionable while real used. moreover, please inquire of the person in charge of our company about the terminal without the explanation especially. (11)content of material the application notes etc. are t he design material to design the application, and no one of the content securing it. please decide the application after it examines enough and it evaluates it including external parts. status of this document the japanese version of this document is formal specificati on. a customer may use this translation version only for a reference to help reading the formal version. if there are any differences in translation version of this document formal version takes priority
datasheet d a t a s h e e t . 23/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com ordering part number b u 3 3 d v 7 n u x - e 2 wrapping forming specification e2:reelemboss taping part no. output voltage package nux: vson010x3030 lineup output voltage(typ.) package orderable part number 3.4v vson010x3030 bu34dv7nux-e2 3.3v vson010x3030 BU33DV7NUX-e2 marking diagram(s) (top view) product name part number marking bu34dv7nux u34 dv7 BU33DV7NUX u33 dv7 vson010v3030 (top view) vson010v3030 (top view) dv7 part number marking lot numbe r 1pin mark u33 ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tape quantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 4000pcs e2 () direction of feed reel 1pin (unit : mm) vson010x3030 5 1 10 6 2.0 0.1 0.6max 1pin mark 0.4 0.1 0.25 +0.05 -0.04 0.5 3.0 0.1 (0.12) 0.5 3.0 0.1 -0.02 +0.03 0.02 c0.25 1.2 0.1 s s 0.08
datasheet d a t a s h e e t . 24/24 BU33DV7NUX tsz02201-0q1q0ah00110-1-2 ? 2012 rohm co., ltd. all rights reserved. 02.aug.2012 rev.001 tsz22111 ? 15 ? 001 www.rohm.com revision history date revision changes 02.aug.2012 001 new release
datasheet d a t a s h e e t notice - rev.003 ? 2012 rohm co., ltd. all rights reserved. notice general precaution 1) before you use our products, you are requested to care fully read this document and fully understand its contents. rohm shall not be in any way responsible or liable for fa ilure, malfunction or accident arising from the use of any rohm?s products against warning, caution or note contained in this document. 2) all information contained in this document is current as of the issuing date and subjec t to change without any prior notice. before purchasing or using rohm?s products, please confirm the la test information with a rohm sales representative. precaution on using rohm products 1) our products are designed and manufactured for applicat ion in ordinary electronic equipments (such as av equipment, oa equipment, telecommunication equipment, home electroni c appliances, amusement equipment, etc.). if you intend to use our products in devices requiring extremel y high reliability (such as medical equipment, transport equipment, traffic equipment, aircraft/spacecra ft, nuclear power controllers, fuel c ontrollers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property (?specific applications?), please consult with the rohm sale s representative in advance. unless otherwise agreed in writing by rohm in advance, ro hm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any ro hm?s products for specific applications. 2) rohm designs and manufactures its products subject to strict quality control system. however, semiconductor products can fail or malfunction at a certain rate. please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe desi gn against the physical injury, damage to any property, which a failure or malfunction of our products may cause. the following are examples of safety measures: [a] installation of protection circuits or other protective devices to improve system safety [b] installation of redundant circuits to reduce the impact of single or multiple circuit failure 3) our products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditio ns, as exemplified below. accordin gly, rohm shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of an y rohm?s products under any special or extraordinary environments or conditions. if you intend to use our products under any special or extraordinary environments or conditions (as exemplified bel ow), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] use of our products in any types of liquid, incl uding water, oils, chemicals, and organic solvents [b] use of our products outdoors or in places where the products are exposed to direct sunlight or dust [c] use of our products in places where the products ar e exposed to sea wind or corrosive gases, including cl 2 , h 2 s, nh 3 , so 2 , and no 2 [d] use of our products in places where the products are exposed to static electricity or electromagnetic waves [e] use of our products in proximity to heat-producing components, plastic cords, or other flammable items [f] sealing or coating our products with resin or other coating materials [g] use of our products without cleaning residue of flux (ev en if you use no-clean type fluxes, cleaning residue of flux is recommended); or washing our products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] use of the products in places subject to dew condensation 4) the products are not subjec t to radiation-proof design. 5) please verify and confirm characteristics of the final or mounted products in using the products. 6) in particular, if a transient load (a large amount of load applied in a short per iod of time, such as pulse) is applied, confirmation of performance characteristics after on-boar d mounting is strongly recomm ended. avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading c ondition may negatively affect product performance and reliability. 7) de-rate power dissipation (pd) depending on ambient temper ature (ta). when used in seal ed area, confirm the actual ambient temperature. 8) confirm that operation temperature is within t he specified range described in the product specification. 9) rohm shall not be in any way responsible or liable for fa ilure induced under deviant condi tion from what is defined in this document.
datasheet d a t a s h e e t notice - rev.003 ? 2012 rohm co., ltd. all rights reserved. precaution for mounting / circuit board design 1) when a highly active halogenous (chlori ne, bromine, etc.) flux is used, the resi due of flux may negatively affect product performance and reliability. 2) in principle, the reflow soldering method must be used; if flow soldering method is preferred, please consult with the rohm representative in advance. for details, please refer to rohm mounting specification precautions regarding application examples and external circuits 1) if change is made to the constant of an external circuit, pl ease allow a sufficient margin c onsidering variations of the characteristics of the products and external components, including transient characteri stics, as well as static characteristics. 2) you agree that application notes, re ference designs, and associated data and in formation contained in this document are presented only as guidance for products use. theref ore, in case you use such information, you are solely responsible for it and you must exercise your own indepen dent verification and judgment in the use of such information contained in this document. rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. precaution for electrostatic this product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. please take proper caution in your manufacturing process and storage so that voltage exceeding t he products maximum rating will not be applied to products. please take special care under dry condit ion (e.g. grounding of human body / equipment / solder iron, isolation from charged objects, se tting of ionizer, friction prevention and temperature / humidity control). precaution for storage / transportation 1) product performance and soldered connections may deteriora te if the products are stor ed in the places where: [a] the products are exposed to sea winds or corros ive gases, including cl2, h2s, nh3, so2, and no2 [b] the temperature or humidity exceeds those recommended by rohm [c] the products are exposed to di rect sunshine or condensation [d] the products are exposed to high electrostatic 2) even under rohm recommended storage c ondition, solderability of products out of recommended storage time period may be degraded. it is strongly recommended to confirm sol derability before using products of which storage time is exceeding the recommended storage time period. 3) store / transport cartons in the co rrect direction, which is indicated on a carton with a symbol. otherwise bent leads may occur due to excessive stress applied when dropping of a carton. 4) use products within the specified time after opening a hum idity barrier bag. baking is required before using products of which storage time is exceeding the recommended storage time period. precaution for product label qr code printed on rohm products label is for rohm?s internal use only. precaution for disposition when disposing products please dispose them proper ly using an authorized industry waste company. precaution for foreign exchange and foreign trade act since our products might fall under cont rolled goods prescribed by the applicable foreign exchange and foreign trade act, please consult with rohm representative in case of export. precaution regarding intellectual property rights 1) all information and data including but not limited to application example contain ed in this document is for reference only. rohm does not warrant that foregoi ng information or data will not infringe any intellectual property rights or any other rights of any third party regarding such information or data. rohm shall not be in any way responsible or liable for infringement of any intellectual property rights or ot her damages arising from use of such information or data.: 2) no license, expressly or implied, is granted hereby under any intellectual property rights or other rights of rohm or any third parties with respect to the information contained in this document.
datasheet d a t a s h e e t notice - rev.003 ? 2012 rohm co., ltd. all rights reserved. other precaution 1) the information contained in this document is provi ded on an ?as is? basis and rohm does not warrant that all information contained in this document is accurate and/or error-free. rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties resulting from inaccuracy or errors of or concerning such information. 2) this document may not be reprinted or reproduced, in whol e or in part, without prior written consent of rohm. 3) the products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of rohm. 4) in no event shall you use in any way whatsoever the pr oducts and the related technical information contained in the products or this document for any military purposes, incl uding but not limited to, the development of mass-destruction weapons. 5) the proper names of companies or products described in this document are trademarks or registered trademarks of rohm, its affiliated companies or third parties.

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