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product structure silicon monolithic integrated circuit this product is not designed for pr otection against radioactive rays . 1/14 tsz02201-0q1q0ah00220-1-2 ? 2013 rohm co., ltd. all rights reserved. 14.feb.2013 rev.001 tsz22111 ? 14 ? 001 www.rohm.com datashee t 1.75v to 4.5v, 10ma 1ch synchronous boost dc/dc converter BU33DV5G general description the BU33DV5G 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 10ma while using two alkaline, and discharge it down to 1.8 v. the boost converter is based on a fixed frequency, pulse-width-modulation (pwm) controller using a synchronous rectifier to obtain maximum efficiency. the maximum peak current in the boost switch is typically limited to a value of 10 ma. BU33DV5G output voltage is fixed by an internal resistor divider. the device is packaged in a 5-pin small ssop5 package. features ? synchronous boost dc/dc converter(pwm) 10ma @vout=3.3v, vin=1.8v ? uvlo-detect voltage:1.65v(typ.) ? uvlo-release voltage:1.75v(typ.) ? thermal shutdown applications ? two-cell alkaline, nicd or nimh or single-cellli battery-powered products ? portable audio players ? pda ? cellular phones ? personal medical products typical application circuit(s) key specifications ? input voltage range: 1.75v to 4.5v ? output voltage range: 3.23v to 3.37v ? average output current: 10ma(max.) ? switching frequency: 100khz(typ.) ? standby current: 250a (typ.) ? power-off circuit current 1.0a (max) ? operating temperature range: -25 to +85 package(s) w(typ.) x d(typ.) x h(max.) ssop5 2.90mm x 2.80mm x 1.25mm typical performance characteristics 0 ? 10 ? 20 ? 30 ? 40 ? 50 ? 60 ? 70 ? 80 ? 90 ? 100 ? efficiency ? [%] io ? [ma] efficiency[ta=25 ] 1.8v 2.8v 2.4v 3.0v 2.0v figure 1. application circuit ssop5 figure 2. efficiency downloaded from: http:///
datasheet datasheet 2/14 tsz02201-0q1q0ah00220-1-2 ? 2013 rohm co., ltd. all rights reserved. 14.feb.2013 rev.001 www.rohm.com tsz22111 ? 15 ? 001 BU33DV5G block diagram a a r figure 3. circuit block pin configuration symbol pin no. function terminal circuit en 1 en=vin: power-on en=gnd: power-off b gnd 2 gnd a vin 3 power supply input b sw 4 inductor connection terminal - vout 5 boost voltage output b dont use en pin at open. input-output equivalent circuit i/o equivalent circuit diagram is as follows. figure 4. package (unit : mm) ssop5 2.9 0.2 0.13 4 + 6 4 1.6 2.8 0.2 1.1 0.05 0.05 0.05 + 0.2 0.1 + 0.05 0.03 0.42 + 0.05 0.04 0.95 5 4 12 3 1.25max. 0.2min. 0.1 s s downloaded from: http:///
datasheet datasheet 3/14 tsz02201-0q1q0ah00220-1-2 ? 2013 rohm co., ltd. all rights reserved. 14.feb.2013 rev.001 www.rohm.com tsz22111 ? 15 ? 001 BU33DV5G absolute maximum ratings(ta=25 ) parameter symbol ratings unit condition maximum applied voltage vmax 6.0 v power dissipation pd 674.9 (note1) mw 1 layer board (70mm x 70mm x 1.6mm) 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 6.749mw/ . operating conditions parameter symbol ratings unit condition power supply voltage range vcc 1.75 to 4.5 v vin terminal voltage electrical characteristics (unless otherwise specified ta=25 , vin=2.8v) parameter symbol min. ty p. max. unit condition circuit current1 icc1 - 0.01 1.0 a en=0v circuit current2 icc2 - 250 350 a en=vin, io=0ma oscillation frequency fsw 80 100 120 khz output voltage range vout 3.23 3.3 3.37 v io=1ma current limit ilim - 240 - ma en input high vih 1.6 - - v en input low vil - - 0.35 v uvlo release threshold vuvlor 1.7 1.75 1.8 v vin rising uvlo detect threshold vuvlod - 1.65 - v vin falling uvlo hysteresis vuvlohys 0.05 0.1 0.15 v note1: load disconnect during shutdown. downloaded from: http:///
datasheet datasheet 4/14 tsz02201-0q1q0ah00220-1-2 ? 2013 rohm co., ltd. all rights reserved. 14.feb.2013 rev.001 www.rohm.com tsz22111 ? 15 ? 001 BU33DV5G typical performance curve(s) 80 85 90 95 10 0 10 5 11 0 11 5 12 0 1.8 2.0 2.2 2.4 2.6 2.8 3.0 vin[v] frequency[khz] figure 5. quiescent current figure 6. core current (this is only vin current. not include sw current) figure 7. frequency 0.0 0.2 0.4 0.6 0.8 1.0 0246 vin[v] core_icc[ a] 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0 246 vin[v] icc_core[ma] 105 -60 25 105 25 -60 -60 105 25 downloaded from: http:///
datasheet datasheet 5/14 tsz02201-0q1q0ah00220-1-2 ? 2013 rohm co., ltd. all rights reserved. 14.feb.2013 rev.001 www.rohm.com tsz22111 ? 15 ? 001 BU33DV5G electrical characteristic curves (reference data) C continued 0 20 40 60 80 10 0 0246 8101214161820 io[ma] efficiency[%] figure 8. efficiency[ta=-30 ] figure 9. efficiency[ta=25 ] figure 10. efficiency[ta=-85 ] 0 20 40 60 80 10 0 0246 8101214161820 io[ma] efficiency[%] 0 20 40 60 80 10 0 0246 8101214161820 io[ma] efficiency[%] 3.0v 2.8v 2.4v2.0v 1.8v 3.0v 2.8v 2.0v 1.8v 2.4v 3.0v 2.8v 2.0v 1.8v 2.4v downloaded from: http:///
datasheet datasheet 6/14 tsz02201-0q1q0ah00220-1-2 ? 2013 rohm co., ltd. all rights reserved. 14.feb.2013 rev.001 www.rohm.com tsz22111 ? 15 ? 001 BU33DV5G electrical characteristic curves (reference data) C continued 3.3 00 3.3 05 3.3 10 3.3 15 3.3 20 3.3 25 3.3 30 3.3 35 3.3 40 0 5 10 15 20 io[ m a] output voltage[v] figure 11. load-regulation[ta=-30 ] figure 12. load-regulation [ta=25 ] figure 13. load-regulation[ta=-85 ] 3.2 60 3.2 65 3.2 70 3.2 75 3.2 80 3.2 85 3.2 90 3.2 95 3.3 00 0 5 10 15 20 io[ m a] output voltage [v] 3.2 80 3.2 85 3.2 90 3.2 95 3.3 00 3.3 05 3.3 10 3.3 15 3.3 20 0 5 10 15 20 io[ m a] output voltage[v] 3.0v 2.8v2.0v 1.8v 2.4v 3.0v 2.8v 2.0v 1.8v 2.4v 3.0v 2.8v 2.0v 1.8v 2.4v downloaded from: http:///
datasheet datasheet 7/14 tsz02201-0q1q0ah00220-1-2 ? 2013 rohm co., ltd. all rights reserved. 14.feb.2013 rev.001 www.rohm.com tsz22111 ? 15 ? 001 BU33DV5G electrical characteristic curves (reference data) C continued 3.3 00 3.3 05 3.3 10 3.3 15 3.3 20 3.3 25 3.3 30 3.3 35 3.3 40 1. 82.02. 22.42.62. 83.0 vin[v] output voltage[v] figure 14. line-regulation[ta=-30 ] figure 15. line-regulation [ta=25 ] figure 16. line-regulation[ta=-85 ] 3.2 60 3.2 65 3.2 70 3.2 75 3.2 80 3.2 85 3.2 90 3.2 95 3.3 00 1. 82.02. 22.42.62. 83.0 vin[v] output voltage [v] 3.2 80 3.2 85 3.2 90 3.2 95 3.3 00 3.3 05 3.3 10 3.3 15 3.3 20 1. 82.02. 22.42.62. 83.0 vin[v] output voltage[v] 20ma 10ma 2ma 0ma 20ma 10ma 2ma 0ma 20ma 10ma 2ma 0ma downloaded from: http:///
datasheet datasheet 8/14 tsz02201-0q1q0ah00220-1-2 ? 2013 rohm co., ltd. all rights reserved. 14.feb.2013 rev.001 www.rohm.com tsz22111 ? 15 ? 001 BU33DV5G electrical characteristic curves (reference data) C continued figure 17. measure circuit figure 18. rise vin=2.8v[cr2032],io=0ma figure 19. rise vin=2.8v[cr2032], ro=1.65k figure 20. vin=2.8v[cr2032],io=0ma figure 21. vin=2.8v[cr2032], ro=1.65k downloaded from: http:///
datasheet datasheet 9/14 tsz02201-0q1q0ah00220-1-2 ? 2013 rohm co., ltd. all rights reserved. 14.feb.2013 rev.001 www.rohm.com tsz22111 ? 15 ? 001 BU33DV5G electrical characteristic curves (reference data) C continued figure 22. io change 1ma=>5ma,vin=2.8v[cr2032] figure 23. io change 5ma=>1ma,vin=2.8v[cr2032] figure 24. io change 1ma=>10ma,vin=2. 8v[cr2032] figure 25. io change 10ma=>1ma,vin=2.8v[cr2032] downloaded from: http:///
datasheet datasheet 10/14 tsz02201-0q1q0ah00220-1-2 ? 2013 rohm co., ltd. all rights reserved. 14.feb.2013 rev.001 www.rohm.com tsz22111 ? 15 ? 001 BU33DV5G functional descriptions 1) under voltage lockout (uvlo) dcdc converter stops the boost action when po wer-supply voltage drops to detect voltage. uvlo release automatically when power-supply voltage rises, release voltage is 1.75v (typ.). detect voltage is 1.65v (typ.) 2) over current protection 1 over current protection circuit work when over current run to pownmos. 240ma(typ.) 3) over current protection 2 over current protection circuit work when over current run to powpmos. 30ma(typ.) this protection work at soft start. how to select parts of application parts no. name value style(vendor) l1 inductance 22 h vlf3010st-220mr34 (tdk) c1 capacitor 47 f x7r, x5r ceramic c2 capacitor 4.7 f x7r, x5r ceramic downloaded from: http:///
datasheet datasheet 11/14 tsz02201-0q1q0ah00220-1-2 ? 2013 rohm co., ltd. all rights reserved. 14.feb.2013 rev.001 www.rohm.com tsz22111 ? 15 ? 001 BU33DV5G notes of board layout BU33DV5G is switching dcdc converter, so characteristic s 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. 70m 70mm 1.6mm (rohm standard 1 layer board mounting) downloaded from: http:///
datasheet datasheet 12/14 tsz02201-0q1q0ah00220-1-2 ? 2013 rohm co., ltd. all rights reserved. 14.feb.2013 rev.001 www.rohm.com tsz22111 ? 15 ? 001 BU33DV5G operational notes 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 electrical 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. 9 rush c urrent 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 the 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. downloaded from: http:///
datasheet datasheet 13/14 tsz02201-0q1q0ah00220-1-2 ? 2013 rohm co., ltd. all rights reserved. 14.feb.2013 rev.001 www.rohm.com tsz22111 ? 15 ? 001 BU33DV5G ordering information b u 3 3 d v 5 g t r part number package g: ssop5 packaging and forming specification tr: embossed tape and reel physical dimension tape and reel information marking diagram(s) direction of feed reel ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tapequantity direction of feed the direction is the 1pin of product is at the upper right when you hold reel on the left hand and you pull out the tape on the right hand 3000pcs tr () 1pin (unit : mm) ssop5 2.9 0.2 0.13 4 + 6 4 1.6 2.8 0.2 1.1 0.05 0.05 0.05 + 0.2 0.1 + 0.05 0.03 0.42 + 0.05 0.04 0.95 5 4 12 3 1.25max. 0.2min. 0.1 s s part number marking ssop5(top view) lot numbe r j 4 downloaded from: http:///
datasheet datasheet 14/14 tsz02201-0q1q0ah00220-1-2 ? 2013 rohm co., ltd. all rights reserved. 14.feb.2013 rev.001 www.rohm.com tsz22111 ? 15 ? 001 BU33DV5G revision history date revision changes 14.feb.2013 001 new release downloaded from: http:///
datasheet d a t a s h e e t notice - ge rev.002 ? 2014 rohm co., ltd. all rights reserved. notice precaution on using rohm products 1. our products are designed and manufac tured for application in ordinary elec tronic 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 ex tremely high reliability (such as medical equipment (note 1) , 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, 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 any ro hms products for specific applications. (note1) medical equipment classification of the specific applications japan usa eu china class class class b class class class 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 rohms 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 below), 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 temperat ure is within the 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. 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 met hod is preferred, please consult with the rohm representative in advance. for details, please refer to rohm mounting specification downloaded from: http:///
datasheet d a t a s h e e t notice - ge rev.002 ? 2014 rohm co., ltd. all rights reserved. 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 considering 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 independent 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 humidity 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 rohms 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 contained 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. other precaution 1. this document may not be reprinted or reproduced, in whol e or in part, without prior written consent of rohm. 2. the products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of rohm. 3. in no event shall you use in any wa y whatsoever the products 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. 4. the proper names of companies or products described in this document are trademarks or registered trademarks of rohm, its affiliated companies or third parties. downloaded from: http:///
datasheet datasheet notice C we rev.001 ? 2014 rohm co., ltd. all rights reserved. general precaution 1. before you use our pro ducts, you are requested to care fully read this document and fully understand its contents. rohm shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny rohms products against warning, caution or note contained in this document. 2. all information contained in this docume nt is current as of the issuing date and subj ec t to change without any prior notice. before purchasing or using rohms products, please confirm the la test information with a rohm sale s representative. 3. the information contained in this doc ument is provi ded on an as is basis and rohm does not warrant that all information contained in this document is accurate an d/or error-free. rohm shall not be in an y way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or concerning such information. downloaded from: http:///

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