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1/14 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 regulator with built-in power mosfet BD9130NV description rohm?s high efficiency step-down swit ching regulator BD9130NV is a power supply designed to produce a low voltage including 1 volts from 5.5/3.3 volts power supply line. offers hi gh efficiency with our original pulse skip control technology and synchronous rectifier. employs a current mode control syst em 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/pch fet) and sllm tm (simple light load mode) 3) incorporates soft-start function. 4) incorporates thermal protection and ulvo functions. 5) incorporates short-current protec tion circuit with time delay function. 6) incorporates shutdown function 7) employs small surface mount package : son008v5060 use power supply for lsi including dsp, micro computer and asic line up parameter symbol limits unit v cc voltage v cc -0.3 +7 *1 v pv cc voltage pv cc -0.3 +7 *1 v en voltage v en -0.3 +7 v sw,ith voltage v sw ,v ith -0.3 +7 v power dissipation 1 pd1 900 *2 mw power dissipation 2 pd2 3900 *3 mw operating temperature range topr -25 +105 storage temperature range tstg -55 +150 maximum junction temperature tjmax +150 *1 pd should not be exceeded. *2 derating in done 7.2mw/ for temperatures above ta=25 , mounted on 70mm70mm1.6mm glass epoxy pcb. *3 derating in done 31.2mw/ for temperatures above ta=25 , mounted on jesd51-7. operating conditions (ta=25 ) parameter symbol limits unit min. typ. max. v cc voltage v cc *4 2.7 *5 3.3 5.5 v pv cc voltage p vcc *4 2.7 *5 3.3 5.5 v en voltage v en 0 - vcc v sw average output current isw *4 - - 2.0 a output voltage setting range v out 1.0 - 2.5 v *4 pd should not be exceeded. *5 in case set output voltage 1.6v or more, vccmin. = vout + 1.3v. no.09027eat36
BD9130NV technical note 2/14 www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. electrical characteristics ? ? ? ? block diagram, application circuit pin number and function table pin no. pin name pin function 1 adj output voltage detect pin 2 v cc vcc power supply input pin 3 ith gmamp output pin/connected phase compensation capacitor 4 gnd ground 5 pgnd nch fet source pin 6 sw pch/nch fet drain output pin 7 pv cc pch fet source pin 8 en enable pin(active high) adj 1 v cc 2 ith 3 gnd 4 8 en 7 pv cc 6 sw 5 pgnd fig.1 top view top view output 3.3v input pv cc pgnd sw gnd gm amp. 2.2h v cc r s q osc uvlo tsd 22f v cc v cc clk slope en current comp 10 f 8 7 2 6 5 4 soft start current sense/ protect + driver logic vref ith a dj r ith c ith 3 1 r1 r2 fig.2 block diagram scp
BD9130NV technical note 3/14 www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. 0.0 0.5 1.0 1.5 2.0 2.5 3.0 012345 output current:i out [a] output voltage:vout[v] characteristic curves (reference data) fig.3 vcc-vout fig.4 v en-vout fig.5 iout-vout fig. 6 ta-vout fig.7 efficiency fig.8 ta-fosc fig.9 ta-r onn r onp fig.10 ta-v en fig.11 ta-icc 0 30 60 90 120 150 180 210 240 270 300 -25 0 25 50 75 100 temperature:ta[
BD9130NV technical note 4/14 www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. cteristic curves (reference data) ? continued fig.12 vcc-fosc fig.13 soft start waveform fig.14 sw waveform io=10ma
BD9130NV technical note 5/14 www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. information on advantages advantage 1 ? ? ? ? ? ? ?
BD9130NV technical note 6/14 www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. operation BD9130NV is a synchronous rectifying step-down switching regulat or that achieves faster tr ansient response by employing current mode pwm control system. it utiliz es switching operation in pwm (pulse width modulation) mode for heavier load, while it utilizes sllm tm (simple light load mode) operation for lighter load to improve efficiency. ? ?
BD9130NV technical note 7/14 www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. description of operations ? ? ? ?
BD9130NV technical note 8/14 www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. switching regulator efficiency efficiency ? ? ? ? consideration on permissible dissipation and heat generation as this ic functions with high efficien cy without significant heat generation in most applications, no special consideration is needed on permissible dissipation or heat generation. in case of extreme conditions, however, including lower input voltage, higher output voltage, heavier load, and/or higher temperature, the permissible di ssipation and/or heat generation must be carefully considered. for dissipation, only conduction losses due to dc resistance of inductor and on resistance of fet are considered. because the conduction losses are considered to play the leading role among other dissipation mentioned above including gate charge/discharge dissipation and switching dissipation. if v cc =3.3v, v out =1.8v, r onp =0.2 ? ? ?
BD9130NV technical note 9/14 www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. selection of components externally connected 1. selection of inductor (l) * current exceeding the current rating of the inductor results in magnetic saturation of the inductor, which decreases efficiency. the inductor must be selected allowing sufficient margin with which the peak current may not exceed its current rating. if v cc =3.3v, v out =1.8v, f=1mhz, ??? ??? ??? ??? ???
BD9130NV technical note 10/14 www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. 4. determination of rith, cith that works as a phase compensator as the current mode control is designed to limit a inductor cu rrent, a pole (phase lag) appears in the low frequency area due to a cr filter consisting of a output capacitor and a load resist ance, while a zero (phase lead) appears in the high frequency area due to the output capacitor and its esr. so, the phases are easily compensated by adding a zero to the power amplifier output with c and r as described below to cancel a pole at the power amplifier. 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. gain [db] phase [deg] fig.30 open loop gain characteristics a 0 0 -90 a 0 0 -90 fz(amp.) fig.31 error amp phase compensation characteristics fp= 2
BD9130NV technical note 11/14 www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. 5. determination of output voltage the output voltage v out is determined by the equation (6): v out =(r2/r1+1) ??? ? ? ? cautions on pc board layout fig.35 layout diagram ?
BD9130NV technical note 12/14 www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. recommended components lists on above application symbol part value manufacturer series l coil 2.2uh tdk ltf5022-2r2n3r2 c in ceramic capacitor 22uf kyocera cm32x5r226m10a c o ceramic capacitor 22uf kyocera cm316b226m06a c ith ceramic capacitor v out =1.0v 680pf murata grm18 serise v out =1.2v 560pf murata grm18 serise v out =1.5v 470pf murata grm18 serise v out =1.8v 330pf murata grm18 serise v out =2.5v 330pf murata grm18 serise r ith resistance v out =1.0v 10k ? ? ? ? ? i/o equivalence circuit fig.36 i/o equivalence circuit en ? ? ? ?
BD9130NV technical note 13/14 www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. notes for use 1. absolute ma ximum ratings while utmost care is taken to quality control of this pr oduct, any application that may exceed some of the absolute maximum ratings including the voltage applied and the operatin g temperature range may result in breakage. if broken, short-mode or open-mode may not be identified. so if it is expected to encounter with special mode that may exceed the absolute maximum ratings, it is requested to take necessary sa fety measures physically including insertion of fuses. 2. electrical potential at gnd gnd must be designed to have the lowest elec trical potential in any operating conditions. 3. short-circuiting between terminals, and mismounting when mounting to pc board, care must be taken to avoid mistak e in its orientation and alignment. failure to do so may result in ic breakdown. short-circuiting due to foreign matters entered between output terminals, or between output and power supply or gnd may also cause breakdown. 4.operation in strong electromagnetic field be noted that using the ic in the strong electr omagnetic radiation can cause operation failures. 5. thermal shutdown protection circuit thermal shutdown protection circuit is the circuit designed to isolate the ic from thermal runaway, and not intended to protect and guarantee the ic. so, the ic the thermal shutdown protection circui t of which is once activated should not be used thereafter for any operation originally intended. 6. inspection with the ic set to a pc board if a capacitor must be connected to the pin of lower impedanc e during inspection with the ic set to a pc board, the capacitor must be discharged after each process to avoid stre ss to the ic. for electrostatic protection, provide proper grounding to assembling processes with special care taken in handling and storage. when connecting to jigs in the inspection process, be sure to turn off the power supply before it is connected and removed. 7. input to ic terminals this is a monolithic ic with p + isolation between p-substrate and each element as illustrated below. this p-layer and the n-layer of each element form a p-n junction, and various parasitic element are formed. if a resistor is joined to a transistor terminal as shown in fig 37. ? ? resistor
BD9130NV technical note 14/14 www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. (unit : mm) son008v5060 0.08 s s 765 4321 8 (0.22) c0.25 1pin mark +0.03 - 0.02 0.02 0.59 0.4 +0.05 - 0.04 5.0 0.15 6.0 0.15 4.2 0.1 3.6 0.1 0.8 0.1 1.0max 1.27 ? 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 upper left when you hold reel on the left hand and you pull out the tape on the right hand 2000pcs e2 () direction of feed reel 1pin
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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