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| 1/15 www.rohm.com 2013.07 - rev.b c 2009 rohm co., ltd. all rights reserved. large current external fet controller type switching regulators step-up/down, high-efficiency switching regulators (controller type) bd8303muv general description rohm?s highly-efficient step-up/down switching regulator bd8303muv generates step-up/down output including 3.3 v / 5 v from 1 cell of lithium battery, 4 batteries, or 2 cells of li batteries with just one inductor. this ic adopts an original step-up/down drive system and creates a higher efficient power supply than conventional sepic-system or h-bridge system switching regulators. features 1)highly-efficient step-up/down dc/dc converter to be constructed just with one inductor. 2) supports a wide range of power supply voltage range (input voltage: 2.7 v - 14.0 v) 3) supports high-current application with external nch fet. 4) incorporates soft-start function. 5) incorporates timer latch system short protecting function. 6) high heat radiation surface mounted package qfn16 pin, 3 mm 3 mm application general portable equipment like dvc, single-lens reflex cameras, portable dvds, or mobile pcs absolute ma ximum ratings when installed on a 70.0 mm 70.0 mm 1.6 mm glass epoxy board. the rating is reduced by 4.96 mw/c at ta = 25c or mor e. operating conditions (ta = 25c) parameter symbol standard value unit min typ max power supply voltage vcc 2.7 14 v output voltage vout 1.8 12 v oscillation frequency fosc 0.2 0.6 1.0 mhz * these specifications are subject to change wit hout advance notice for modifications and other reasons. parameter symbol rating unit maximum applied power voltage vcc 15 v vreg 7 v between boot 1, 2 and sw 1, 2 7 v between boot 1, 2 and gnd 20 v sw1, 2 15 v power dissipation pd 620 mw operating temperat ure range topr 25 to +85 c storage temperature range tstg 55 to +150 c junction temperature tjmax +150 c no.13028ebt02
technical note 2/15 bd8303muv www.rohm.com 2013.07 - rev.b ? ? ? ? ? ? ? technical note 3/15 bd8303muv www.rohm.com 2013.07 - rev.b technical note 4/15 bd8303muv www.rohm.com 2013.07 - rev.b ?? technical note 5/15 bd8303muv www.rohm.com 2013.07 - rev.b uvlo vreg vref pre driver pre driver pre driver pre driver on/off logic timming control vreg pwm control timming control + - - osc soft start scp error amp osc x 2400 count vref 1.0v osc x 8200 count fb=h vreg stb boot2 hg2 sw2 lg2 pgnd lg1 sw1 hg1 boot1 vreg vcc rt inv fb gnd on/off vout vbat technical note 6/15 bd8303muv www.rohm.com 2013.07 - rev.b ? ? ? ? technical note 7/15 bd8303muv www.rohm.com 2013.07 - rev.b technical note 8/15 bd8303muv www.rohm.com 2013.07 - rev.b technical note 9/15 bd8303muv www.rohm.com 2013.07 - rev.b ? ? ? ? S S S i l S S ??? technical note 10/15 bd8303muv www.rohm.com 2013.07 - rev.b ? ? ? technical note 11/15 bd8303muv www.rohm.com 2013.07 - rev.b ? -180 0 -90 (a) phase margin gain [db] phase [degree] -20db/decade a 0 error amp is a low-pass filter because phase compensation such as (1) and (2) is performed. for dc /dc converter application, r is a parallel feedback resistance. fig.31 frequency property of integrator fig.30 general integrator fb r c point (a) (b) point (b) technical note 12/15 bd8303muv www.rohm.com 2013.07 - rev.b technical note 13/15 bd8303muv www.rohm.com 2013.07 - rev.b vreg vreg gnd inv vreg vreg gnd fb vcc vcc gnd stb boot1,2 sw1,2 hg1,2 pgnd vreg pgnd lg1,2 vcc gnd vreg vreg vreg rt gnd technical note 14/15 bd8303muv www.rohm.com 2013.07 - rev.b () technical note 15/15 bd8303muv www.rohm.com 2013.07 - rev.b ? ordering part number b d 8 3 0 3 m u v - e 2 part no. part no. package muv: vqfn016v3030 packaging and forming specification e2: embossed tape and reel (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) direction of feed vqfn016v3030 ( unit:mm ) datasheet datasheet notice - rev.004 ? 2013 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, 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 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 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 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 datasheet notice - rev.004 ? 2013 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 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 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 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 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 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. datasheet datasheet notice - rev.004 ? 2013 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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