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1/12 www.rohm.com 2010.11 - rev. a ? 2010 rohm co., ltd. all rights reserved. standard ldo regulators standard fixed output ldo regulators BD80C0AFPS,bd90c0afps description the BD80C0AFPS, bd90c0afps is low-saturation regulator. this ic has a built-in over-current protection circuit that prevents the destruction of the ic due to output short circuits and a thermal shutdown ci rcuit that protects the ic from therma l damage due to overloading. features 1) output current: 1a 2) output voltage: 8.0v / 9.0v 3) high output voltage precision: 1% 4) low saturation with pdmos output 5) built-in over-current protection circuit that prevents the destruction of the ic due to output short circuits 6) built-in thermal shutdown circuit for protec ting the ic from thermal damage due to overloading 7) low esr capacitor 8) to252s-3 packaging applications audiovisual equipments, fpds, televisions, per sonal computers or any other consumer device absolute maximum ratings (ta=25 ) parameter symbol ratings unit supply voltage *1 v cc -0.3 ~ +35.0 v power dissipation *2 pd 1.2 w operating temperature ra nge topr -40 ~ +105 storage temperature range tstg -55 ~ +150 maximum junction temperature tjmax +150 *1 not to exceed pd. *2 to252s-3:reduced by 9.6mw / c over ta = 25c, when mounted on glass epoxy board: 70mm 70mm 1.6mm. note: this product is not designed for protection against radioactive rays. operating conditions (ta=25 ) BD80C0AFPS parameter symbol min. max. unit supply voltage v cc 9.0 25.0 v output current io 0 1.0 a bd90c0afps parameter symbol min. max. unit supply voltage vcc 10.0 25.0 v output current io 0 1.0 a no.10021eat02
technical note 2/12 www.rohm.com 2010.11 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD80C0AFPS,bd90c0afps
technical note 3/12 www.rohm.com 2010.11 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD80C0AFPS,bd90c0afps fig.5 dropout voltage (vcc=vo []
technical note 4/12 www.rohm.com 2010.11 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD80C0AFPS,bd90c0afps fig.14 dropout voltage (vcc=vo output current : io[ma] ambient temperature: ta[] output voltage : vo [v]
technical note 5/12 www.rohm.com 2010.11 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD80C0AFPS,bd90c0afps and and and and and and and and
technical note 6/12 www.rohm.com 2010.11 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD80C0AFPS,bd90c0afps
technical note 7/12 www.rohm.com 2010.11 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD80C0AFPS,bd90c0afps R Q () Q Q () mm mm mm mm m mm
technical note 8/12 www.rohm.com 2010.11 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD80C0AFPS,bd90c0afps R R
technical note 9/12 www.rohm.com 2010.11 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD80C0AFPS,bd90c0afps cout_esr vs io(reference data) cin vs cout(reference data) vcc=9v 1 10 100 1 10 100 coutf cinf 0.001 0.01 0.1 1 10 100 0 200 400 600 800 1000 io(ma) cout_esr(? ( 1 ? ?
technical note 10/12 www.rohm.com 2010.11 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD80C0AFPS,bd90c0afps vcc gnd 15. applications or inspection processes where the potential of the vcc pin or other pins may be reversed from their normal state may cause damage to the ic's internal circuitry or elements. use an output pin capacitance of 1000f or lower in case vcc is shorted with the gnd pin while the external capacitor is charged. insert a diode in series with vcc to prevent reverse current flow, or insert bypass diodes between vcc and each pin. 16. positive voltage surges on v cc pin a power zener diode should be inserted between v cc and gnd for protection against voltage surges of more than 35v on the v cc pin. 17. negative voltage surges on v cc pin a schottky barrier diode should be inserted between v cc and gnd for protection against voltages lower than gnd on the v cc pin. 18. output protection diode loads with large inductance components may cause reverse current flow during startup or shutdown. in such cases, a protection diode should be inserted on the output to protect the ic. vcc gnd
technical note 11/12 www.rohm.com 2010.11 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD80C0AFPS,bd90c0afps 19. regarding input pins of the ic this monolithic ic contains p+ isolation a nd p substrate layers between adjacent elements in order to keep them isolated. pn junctions are formed at the intersection of these p layers wi th the n layers of other elements, creating parasitic diodes and/or transistors. for example (refer to the figure below):
technical note 12/12 www.rohm.com 2010.11 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD80C0AFPS,bd90c0afps
r1010 a www.rohm.com ? 2010 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 products. 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, redunda ncy, 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, aerospac e 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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