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1/16 www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. single-chip type with built-in fet switching regulator series output 2a or more high-efficiency step-down switching regulators with built-in power mosfet bd9139muv description rohm?s high efficiency step-down switchin g regulator bd9139muv is a power supply designed to produce a low voltage including 0.8 volts from 5.5/3.3 volts power supply line. of fers high efficiency with our original pulse skip control technology and synchronous rectifier. employs a current m ode control system to provide faster transient response to sudden change in load. features 1) offers fast transient response with current mode pwm control system. 2) offers highly efficiency for all load range with synchronous rectifier (nch/nch fet) and sllm (simple light load mode) 3) incorporates soft-start function. 4) incorporates thermal prot ection and ulvo functions. 5) incorporates short-current protecti on circuit with time delay function. 6) incorporates shutdown function icc=0 a(typ.) 7) employs small surface mount package : vqfn016v3030 applications power supply for lsi including dsp, micro computer and asic absolute maximu m rating (ta=25 ) parameter symbol limits unit bd9139muv v cc voltage v cc -0.3 +7 * 1 v pv cc voltage pv cc -0.3 +7 * 1 v bst voltage v bst -0.3 +13 v bst_sw voltage v bst - sw -0.3 +7 v en voltage ven -0.3 +7 v sw,ith voltage vsw, vith -0.3 +7 v power dissipation 1 pd1 0.27 * 2 w power dissipation 2 pd2 0.62 * 3 w power dissipation 3 pd3 1.77 * 4 w power dissipation 4 pd4 2.66 * 5 w operating temperature range topr -40 +105 storage temperature range ts t g -55 +150 maximum junction temperature tj +150 1 pd should not be exceeded. 2 ic only 3 1-layer. mounted on a 74.2mm 74.2mm 1.6mm glass-epoxy board, occupied area by copper foil : 6.28mm 2 4 4-layer. mounted on a 74.2mm 74.2mm 1.6mm glass-epoxy board, occupied area by copper foil : 6.28mm 2 , in each layers 5 4-layer. mounted on a 74.2mm 74.2mm 1.6mm glass-epoxy board, occupied area by copper foil : 5505mm 2 , in each layers operating conditions (ta=-40 +105 ) parameter symbol bd9139muv unit min. typ. max. power supply voltage v cc 2.7 3.3 5.5 v pv cc 2.7 3.3 5.5 v en voltage ven 0 - 5.5 v output voltage setting range v out 0.8 - 3.3* 6 v sw average output current i sw - - 3.0* 7 a 6 in case set output voltage 1.6v or more, vccmin = vout+1.3v. 7 pd should not be exceeded. no.09027eat19
technical note 2/16 bd9139muv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. 3.0 0.1 1pin mark 3.0 0.1 14 5 8 9 13 16 12 0.5 1.4 0.1 1.4 0.1 0.25 ? 0.04 + 0.05 0.4 0.1 c0.2 0.75 s 0.02 + 0.03 ? 0.02 (0.22) 0.08 1.0max s d 9 1 3 9
technical note 3/16 bd9139muv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. electrical characteristic curves
technical note 4/16 bd9139muv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. electrical characteristic curves ? continued sw v out fig.15 sw waveform io=3a vcc=5v ta = 2 5
technical note 5/16 bd9139muv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. ? ? ? ? ? ?
technical note 6/16 bd9139muv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. ? ?
technical note 7/16 bd9139muv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. ? ? ?
technical note 8/16 bd9139muv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. ? ?
technical note 9/16 bd9139muv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved.
technical note 10/16 bd9139muv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. ??? ??? ??? ???
technical note 11/16 bd9139muv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. 3. selection of input capacitor (cin) a low esr 22 ???
technical note 12/16 bd9139muv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. stable feedback loop may be achieved by canceling the pole fp (min.) produced by the output capacitor and the load resistance with cr zero correction by the error amplifier. 5. determination of output voltage the output voltage v out is determined by the equation (6): v out =(r2/r1+1) ??? ? ? ?
technical note 13/16 bd9139muv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved.
technical note 14/16 bd9139muv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. ? ? ? ? ?
technical note 15/16 bd9139muv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved.
technical note 16/16 bd9139muv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. b d 9 1 3 9 v D e 2 rohm part number type package specification package 39 : ad j ustable ( 0.8 e2 : embossed taping (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) tape quantity direction of feed embossed carrier tape 3000pcs e2 v qfn016v3030 u m 3.0 0.1 1pin mark 3.0 0.1 14 5 8 9 13 16 12 0.5 1.4 0.1 1.4 0.1 0.25 ? 0.04 + 0.05 0.4 0.1 c0.2 0.75 s 0.02 + 0.03 ? 0.02 (0.22) 0.08 1.0max s
r0039 a www.rohm.com ? 2009 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, 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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