1/9 www.rohm.com 2011.03 - rev.b ? 2011 rohm co., ltd. all rights reserved. automotive body power management lsi voltage tracker BD3925FP-C,bd3925hfp-c description BD3925FP-C and bd3925hfp-c are voltage trackers for automot ive use which feature high withstand-voltage to 50v. they offer the output current loading to 500ma while limiting the quiescent current to 45a (typ.), so that they suit to apply for systems which are permanently connected to the car battery and requiring low-current-consumption. the offset is 15mv (for 5v output. 6v < vcc < 36v, 5ma < lo < 200ma). th ey integrate folded?type of over-current protection to minimize heat dissipation while accidentally shorted, th us lead to most robust power-supply design under the harsh automotive environment. ? features 1) ultra-low quiescent current: 45a (typ.) 2) low-saturation voltage type p-channel dmos output transistors 3) low offset voltage: ? 15mv(for 5v output, 6v< vcc <36v, 5maBD3925FP-C to252-5 bd3925hfp-c hrp5 ? absolute maximum ratings (ta=25c) parameter symbol limit unit supply voltage vcc 50 1 v switch supply voltage v sw 50 v vadj terminal supply voltage v adj 28 v vo terminal voltage vout 28 v output current io 500 ma power dissipation pd 1.3 (to252-5) 2 w 1.6 (hrp5) 3 operating temperature range topr -40 ~ +125 storage temperature range tstg -55 ~ +150 maximum junction temperature tjmax 150 1 not to exceed pd and aso. 2 to252-5: reduced by 10.4 mw/c over 25 c, when mount on a glass epoxy board : 70 mm ? 70 mm ? 1.6 mm. 3 hrp5: reduced by 12.8 mw/c over 25 c, when mount on a glass epoxy board : 70 mm ? 70 mm ? 1.6 mm). note: this product is not designed for protection against radioactive rays. no.11039ebt06
technical note 2/9 BD3925FP-C,bd3925hfp-c www.rohm.com 2011.03 - rev.b ? 2011 rohm co., ltd. all rights reserved. ? ?
technical note 3/9 BD3925FP-C,bd3925hfp-c www.rohm.com 2011.03 - rev.b ? 2011 rohm co., ltd. all rights reserved. ? ] [ ]
technical note 4/9 BD3925FP-C,bd3925hfp-c www.rohm.com 2011.03 - rev.b ? 2011 rohm co., ltd. all rights reserved. ? ? (unit : mm) to252-5 1 2 3 5 4 0.8 0.5 1.27 1.5 2.5 fin 6.50.2 2.30.2 0.50.1 1.00.2 9.50.5 0.50.1 5.5 0.2 1.50.2 c0.5 5.1 +0.2 - 0.1 fig.14 (hfp) start up ocp tsd fin vcc sw gnd adj vo start up ocp tsd fin vcc sw n.c. adj vo sw 210k (unit : mm) hrp5 s 0.08 s (max 9.745 include burr) 5432 1 1.9050.1 0.8 350.2 1.5230.15 10.540.13 ?0.05 +0.1 0.27 4.5 (6.5) 8.82 0.1 9.3950.125 0.730.1 1.72 0.080.05 (7.49) 8.00.13 1.0170.2 1.2575 ?4.5 +5.5
technical note 5/9 BD3925FP-C,bd3925hfp-c www.rohm.com 2011.03 - rev.b ? 2011 rohm co., ltd. all rights reserved. R R ? ? Q ? ? Q Q L L L L L L L L L L L L L L L L L L L L
technical note 6/9 BD3925FP-C,bd3925hfp-c www.rohm.com 2011.03 - rev.b ? 2011 rohm co., ltd. all rights reserved. 0.01 0.1 1 10 100 0 100 200 300 400 500 load current (ma) effective series resistance ()
technical note 7/9 BD3925FP-C,bd3925hfp-c www.rohm.com 2011.03 - rev.b ? 2011 rohm co., ltd. all rights reserved.
technical note 8/9 BD3925FP-C,bd3925hfp-c www.rohm.com 2011.03 - rev.b ? 2011 rohm co., ltd. all rights reserved. 12. about positive surge voltage to protect against a surge voltage that exceeds 50v between vcc and gnd please insert a power zener diode between vcc terminal and gnd. 13. about negative surge voltage to protect against a negative surge voltage, please insert a schottky diode between the vcc terminal and gnd. 14. for an infinitesimal fluctuations of output voltage at the use of the application that infinitesimal fluctuations of output voltage caused by some factors (e.g. disturbance noise, input voltage fluctuations, load fluctuations, etc.), pl ease take enough measures to avoid some influence (e.g. insert the filter, etc.). 15. we recommend using diode for protection purpose when the temperature so output voltage is off. this is to prevent against large loads of impedance or re verse current during initial stages or output off stage 16. this monolithic ic contains p+ isolat ion and p substrate layers between adjacent el ements in order to keep them isolated. p/n junctions are formed at the intersection of these p layers with the n layers of other elements to create a variety of parasitic elements. for example, when the resistors and transis tors are connected to the pins as shown in the following figure,
technical note 9/9 BD3925FP-C,bd3925hfp-c www.rohm.com 2011.03 - rev.b ? 2011 rohm co., ltd. all rights reserved. part number selection b d 3 9 2 5 h f p - c t r part no. part no. package hfp :hrp5 fp :to252-5 packaging and forming specification tr: embossed tape and reel (hrp5) e2: embossed tape and reel (to252-5) direction of feed 1pin reel ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tape quantity direction of feed 2000pcs tr ( ) 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 (unit : mm) hrp5 s 0.08 s (max 9.745 include burr) 5432 1 1.9050.1 0.8 350.2 1.5230.15 10.540.13 ?0.05 +0.1 0.27 4.5 (6.5) 8.82 0.1 9.3950.125 0.730.1 1.72 0.080.05 (7.49) 8.00.13 1.0170.2 1.2575 ?4.5 +5.5 (unit : mm) to252-5 1 2 3 5 4 0.8 0.5 1.27 1.5 2.5 fin 6.50.2 2.30.2 0.50.1 1.00.2 9.50.5 0.50.1 5.5 0.2 1.50.2 c0.5 5.1 +0.2 - 0.1 direction of feed 1pin reel ? 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 lower left when you hold reel on the left hand and you pull out the tape on the right hand 2000pcs e2 ( )
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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