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1/13 www.rohm.com 2011.05 - rev. a ? 2011 rohm co., ltd. all rights reserved. power management switch ics for pc s and digital consumer products 1ch small package high side switch ics for usb devices and memory cards bd2246g, BD2247G description bd2246g and BD2247G are low on-resistance n-channel mo sfet high-side power switches, optimized for universal serial bus (usb) applications. bd2246g and BD2247G are equipp ed with the function of ove r-current detection, thermal shutdown, under-voltage lockout and soft-start. features 1) low on-resistance (typ. 110m ? ) n-channel mosfet built-in 2) reverse current protection when power switch off 3) output discharge function 4) over-current detection 5) thermal shutdown 6) open-drain fault flag output 7) under-voltage lockout 8) soft-start circuit 9) input voltage range: 2.7v ~ 5.5v 10) control input logic active-high (bd2246g), active-low (BD2247G) 11) ssop5 package absolute maximum ratings (ta=25 ) parameter symbol ratings unit vin supply voltage v in -0.3 ~ 6.0 v en(/en) input voltage v en(/en) -0.3 ~ 6.0 v /oc voltage v /oc -0.3 ~ 6.0 v /oc sink current i /oc 5 ma vout voltage v out -0.3 ~ 6.0 v storage temperature t stg -55 ~ 150 power dissipation pd 675 *1 mw *1 mounted on 70mm x 70mm x 1.6mm glass epoxy board. reduce 5.4mw per 1 above 25 * this ic is not designed to be radiation-proof. operating conditions parameter symbol ratings unit min. typ. max. vin operating voltage v in 2.7 5.0 5.5 v operating temperature t opr -40 - 85 no . 11029eat25
technical note 2/13 bd2246g, BD2247G www.rohm.com 2011.05 - rev. a ? 2011 rohm co., ltd. all rights reserved. electrical characteristics (v in = 5v, ta= 25 , unless otherwise specified.) bd2246g dc characteristics parameter symbol limits unit conditions min. typ. max. operating current i dd - 110 160 a v en = 5v, v out = open, v in = 5v - 75 110 v en = 3.3v, v out = open, v in = 3.3v standby current i stb - 0.01 5 a v en = 0v, v out = open, v in = 5v en input voltage v enh 2.0 - - v high input, v in = 3.3~5v v enl - - 0.8 v low input, v in = 5v - - 0.6 low input, v in = 3.3v en input leakage i en -1 0.01 1 a v en = 0v or 5v on-resistance r on - 110 155 m ? i out = 500ma, v in = 5v - 130 180 i out = 500ma, v in = 3.3v reverse leak current i rev - - 1 a v out = 5v, v in = 0v over-current threshold i th 630 765 900 ma v in = 5v 600 740 890 v in = 3.3v short circuit output current i sc 350 500 650 ma v out = 0v,rms, v in = 3.3~5v output discharge resistance r disc 30 60 120 ? i disc = 1ma, v in = 5v 50 100 200 i disc = 1ma, v in = 3.3v /oc output low voltage v /oc - - 0.4 v i /oc = 0.5ma, v in = 3.3~5v uvlo threshold v tuvh 2.1 2.3 2.5 v v in increasing v tuvl 2.0 2.2 2.4 v v in decreasing ac characteristics parameter symbol limits unit conditions min. typ. max. output rise time t on1 - 1 6 ms r l = 20 ? , v in = 3.3~5v output turn-on time t on2 - 1.5 10 ms r l = 20 ? , v in = 3.3~5v output fall time t off1 - 1 20 s r l = 20 ? , v in = 3.3~5v output turn-off time t off2 - 3 40 s r l = 20 ? , v in = 3.3~5v /oc delay time t /oc 10 15 20 ms v in = 5v 11 16 21 v in = 3.3v
technical note 3/13 bd2246g, BD2247G www.rohm.com 2011.05 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2247G dc characteristics parameter symbol limits unit conditions min. typ. max. operating current i dd - 110 160 a v /en = 0v, v out = open, v in = 5v - 75 110 v /en = 0v, v out = open, v in = 3.3v standby current i stb - 0.01 5 a v /en = 5v, v out = open, v in = 5v /en input voltage v /enh 2.0 - - v high input, v in = 3.3~5v v /enl - - 0.8 v low input, v in = 5v - - 0.6 low input, v in = 3.3v /en input leakage i /en -1 0.01 1 a v /en = 0v or 5v on-resistance r on - 110 155 m ? i out = 500ma, v in = 5v - 130 180 i out = 500ma, v in = 3.3v reverse leak current i rev - - 1 a v out = 5v, v in = 0v over-current threshold i th 630 765 900 ma v in = 5v 600 740 890 v in = 3.3v short circuit output current i sc 350 500 650 ma v out = 0v,rms, v in = 3.3~5v output discharge resistance r disc 30 60 120 ? i disc = 1ma, v in = 5v 50 100 200 i disc = 1ma, v in = 3.3v /oc output low voltage v /oc - - 0.4 v i /oc = 0.5ma, v in = 3.3~5v uvlo threshold v tuvh 2.1 2.3 2.5 v v in increasing v tuvl 2.0 2.2 2.4 v v in decreasing ac characteristics parameter symbol limits unit conditions min. typ. max. output rise time t on1 - 1 6 ms r l = 20 ? , v in = 3.3~5v output turn-on time t on2 - 1.5 10 ms r l = 20 ? , v in = 3.3~5v output fall time t off1 - 1 20 s r l = 20 ? , v in = 3.3~5v output turn-off time t off2 - 3 40 s r l = 20 ? , v in = 3.3~5v /oc delay time t /oc 10 15 20 ms v in = 5v 11 16 21 v in = 3.3v
technical note 4/13 bd2246g, BD2247G www.rohm.com 2011.05 - rev. a ? 2011 rohm co., ltd. all rights reserved. measurement circuit vin gnd en(/en) vout /oc v in v en(/en) a 1f vin gnd en(/en) vout /oc v in v en(/en) a 1f r l operating current en,/en input voltage, output rise/fall time vin gnd en(/en) vout /oc v in v en(/en) a 1f i out 10k ? vin gnd en(/en) vout /oc v in v en(/en) a 1f i oc on-resistance, over-current de tection /oc output low voltage fig.1 measurement circuit timing diagram fig.2 output rise/fall time (bd2246g) fig.3 output rise/fall time (BD2247G) t on1 t off1 90% 10% 10% t on2 t off2 50% 50% 90% v /en v out t on1 t off1 90% 10% 10% t on2 t off2 50% 50% 90% v en v out
technical note 5/13 bd2246g, BD2247G www.rohm.com 2011.05 - rev. a ? 2011 rohm co., ltd. all rights reserved. reference data 0.4 0.5 0.6 0.7 0.8 0.9 1.0 -5 0 0 50 1 00 amb ient temp era ture : ta [ ] overcurrent threshold : i th [a] 0.4 0.5 0.6 0.7 0.8 0.9 1.0 2 3456 supply voltage : v in [v ] overcurrent threshold : i th [a] 0 20 40 60 80 100 120 140 2 3456 supply voltage : v in [v] operating current : i dd [ a] 0 20 40 60 80 100 120 140 -50 0 50 100 ambi ent tempe rature : ta[ ] operating current : i dd [ a] 0.0 0.2 0.4 0.6 0.8 1.0 23 456 supply voltage : v in [v ] standby current : i stb [ a] fig.4 operating current en,/en enable fig.5 operating current en,/en enable fig.6 standby current en,/en disable ta =25 c v in =5.0v ta=25c 0.0 0.5 1.0 1.5 2.0 -50 0 50 100 ambient temperature : ta[ ] enable input voltage : v en [v] 0.0 0.5 1.0 1.5 2.0 23456 s upp ly vo lt age : v in [v] enable input voltage : v en [v] 0.0 0.2 0.4 0.6 0.8 1.0 -50 0 50 100 ambient temperature : ta[ ] standby current : i stb [ a] fig.7 standby current en,/en disable fig.8 en,/en input voltage fig.9 en,/en input voltage v in =5.0v ta =25 c v in =5.0v low to high high to low low to high high to low 0 20 40 60 80 10 0 -50 0 50 100 ambient temperature : ta[ ] /oc output low voltage:v /o c [mv] 0 20 40 60 80 10 0 23456 supply voltage : v in [v ] /oc output low voltage:v /o c [mv] fig.13 over-current threshold fig.14 /oc output low voltage fig.15 /oc output low voltage v in =5.0v ta =25 c v in =5.0v fig.10 on-resistance fig.11 on-resistance fig.12 over-current threshold 0 50 100 150 200 -50 0 50 100 ambi ent tempe rature : ta[ ] on resistance : r on [m ] 0 50 100 150 200 2 3456 supply voltage : v in [v ] on resistance : r on [m ] ta =25 c v in =5.0v ta =25 c
technical note 6/13 bd2246g, BD2247G www.rohm.com 2011.05 - rev. a ? 2011 rohm co., ltd. all rights reserved. 0.0 1.0 2.0 3.0 4.0 5.0 -50 0 50 100 a mbi ent t empe rature : ta[ ] turn on time : t on2 [ms] 0.0 1.0 2.0 3.0 4.0 5.0 23456 s upp ly vo lt age : v in [v] turn on time : t on2 [ms] 0.0 1.0 2.0 3.0 4.0 5.0 -50 0 50 100 a mbi ent t empe rature : ta[ ] rise time : t on1 [ms] fig.19 output rise time fig.20 output turn-on time fig.21 output turn-on time v in =5.0v ta =25 c v in =5.0v 0.0 1.0 2.0 3.0 4.0 5.0 6.0 2 3456 supply voltage : v in [v ] turn off time : t off 2 [ s] 0.0 1.0 2.0 3.0 4.0 5.0 -50 0 50 100 a mbi ent t empe rature : ta[ ] fall time : t off 1 [ s] 0.0 1.0 2.0 3.0 4.0 5.0 23456 s upp ly vo lt age : v in [v ] fall time : t off 1 [ s] fig.22 output fall time fig.23 output fall time fig.24 output turn-off time ta =25 c v in =5.0v ta =25 c 10 12 14 16 18 20 -50 0 50 100 ambient temperature : ta[ ] /oc ddlay time : t /o c [ms] 0.0 1.0 2.0 3.0 4.0 5.0 6.0 -50 0 50 100 amb ient temp era ture : ta [ ] turn off time : t off 2 [ s] 10 12 14 16 18 20 23456 supply voltage : v in [v] /oc ddlay time : t /o c [ms] fig.25 output turn-off time fig.26 /oc delay time fig.27 /oc delay time v in =5.0v ta =25 c v in =5.0v 2.0 2.1 2.2 2.3 2.4 2.5 -50 0 50 100 ambi ent tempe rature : ta[ ] uvlo threshold : v tuv h , v tuv l [v] 0.0 0.2 0.4 0.6 0.8 1.0 -50 0 50 100 a mbi ent te mpe rature : ta[ ] uvlo hysteresis voltage:v hsy [v] 0.0 1.0 2.0 3.0 4.0 5.0 23 456 s upp ly vo lt age : v in [v ] ri se time : t on1 [ms] fig.16 uvlo threshold fig.17 uvlo hysteresis voltage fig.18 output rise time v in =5.0v v in =5.0v ta=25c v tuvh v tuvl
technical note 7/13 bd2246g, BD2247G www.rohm.com 2011.05 - rev. a ? 2011 rohm co., ltd. all rights reserved. waveform data (bd2246g) v in =5v time (5ms/div.) fig.34 over-current response enable to shortcircuit time (100ms/div.) fig.35 over-current response enable to shortcircuit v in =5v v en (5v/div.) v in =5v r l =20 v /oc (5v/div.) v out (5v/div.) i out (0.5a/div.) time(1ms/div.) fig.30 output rise characteristic v en (5v/div.) v in =5v r l =20 v /oc (5v/div.) v out (5v/div.) i out (0.5a/div.) time(1us/div.) fig.31 output fall characteristic time (5ms/div.) fig.36 over-current response 1 ? load to enabled device v /oc (5v/div.) v out (5v/div.) i out (1a/div.) v in =5v time (1ms/div.) fig.32 inrush current response (5v/div.) v en i out (0.2a/div.) time (5ms/div.) fig.33 over-current response ramped load v /oc (5v/div.) v out (5v/div.) i out (0.5a/div.) c l =47uf c l =100uf c l =220uf v in =5v r l =20 v in =5v v /oc (5v/div.) time (10ms/div.) fig.37 uvlo response increasing v in v in (5v/div.) v out (5v/div.) i out (0.2a/div.) time (10ms/div.) fig.38 uvlo response decreasing v in v in (5v/div.) v out (5v/div.) i out (0.2a/div.) r l =20 r l =20 v en (5v/div.) v /oc (5v/div.) v out (5v/div.) i out (0.5a/div.) v en (5v/div.) v /oc (5v/div.) v out (5v/div.) i out (0.5a/div.) 0 50 100 150 200 -50 0 50 100 ambi ent tempe rature : ta[ ] disc on resistance : r disc [ ? ] 0 50 100 150 200 2 3456 supply voltage : v in [v] disc on resistance : r disc [ ] fig.28 discharge on resistance fig.29 discharge on resistance ta =25 c v in =5.0v
technical note 8/13 bd2246g, BD2247G www.rohm.com 2011.05 - rev. a ? 2011 rohm co., ltd. all rights reserved. block diagram vin gnd en(/en) 1 2 3 4 5 /oc vout top view fig.39 block diagram fig.40 pin configuration pin description pin no. symbol i/o function 1 vin - switch input and the supply voltage for the ic. 2 gnd - ground. 3 en, /en i enable input. en: high level input turns on the switch. (bd2246g) /en: low level input turns on the switch. (BD2247G) 4 /oc o over-current noti fication terminal. low level output during over-curr ent or over-temperature condition. open-drain fault flag output. 5 vout o switch output. i/o circuit symbol pin no. equivalent circuit en (/en) 3 en (/en) vout 5 vout /oc 4 /oc over-current protection under-voltage lockout dela y counte r charge pump thermal shutdown en(/en) vin /oc gnd vout /en reverse current protection
technical note 9/13 bd2246g, BD2247G www.rohm.com 2011.05 - rev. a ? 2011 rohm co., ltd. all rights reserved. functional description 1. switch operation vin terminal and vout terminal are connected to the drain and the source of switch mosfet respectively. and the vin terminal is used also as power source input to internal control circuit. when the switch is turned on from en,/en control inpu t, vin terminal and vout terminal are connected by a 110m ? (typ.) switch. in on status, the switch is bidirectional. therefore, when the potential of vout terminal is higher than that of vin terminal, current flow s from vout terminal to vin terminal. since a parasitic diode between the drain and t he source of switch mosfet is canceled , in the off status, it is possible to prevent current from flowing reversely from vout to vin. 2. thermal shutdown circuit (tsd) if over-current would continue, the temper ature of the ic would increase drasti cally. if the junction temperature were beyond 135 (typ.) in the condition of over-cu rrent detection, thermal shutdown ci rcuit operates and makes power switch turn off and outputs fault flag (/oc). then, when the junction temperature decreases lower than 115 (typ.), power switch is turned on and fault flag (/oc) is cancelled. unless the fact of the increasing chips temperature is removed or the output of power switch is turned off, this operation repeats. the thermal shutdown circuit operates when the switch is on (en,/en signal is active). 3. over-current detection (ocd) the over-current detection circuit limits current (i sc ) and outputs fault flag (/oc) when current flowing in each switch mosfet exceeds a specified value. there are three types of response against over-current. the over-current detection circuit works when the switch is on (en,/en signal is active). 3-1. when the switch is turned on while the output is in shortcircuit status when the switch is turned on while the out put is in shortcircuit status or so, the switch gets in current limit status soon. 3-2. when the output shortcircu its while the switch is on when the output shortcircuits or large capacity is connected while the switch is on, very large current flows until the over-current limit circuit reacts. when the current detecti on, limit circuit works, current limitation is carried out. 3-3. when the output curre nt increases gradually when the output current increases gradually, current limitat ion does not work until the output current exceeds the over-current detection value. when it exceeds the detection value, current limitation is carried out. 4. under-voltage lockout (uvlo) uvlo circuit prevents the switch from turning on until the vin exceeds 2.3v(typ .). if the vin drops below 2.2v(typ.) while the switch turns on, then uvlo shuts off the power switch. uvlo has hysteresis of a 100mv(typ). under-voltage lockout circuit works when the switch is on (en,/en signal is active). 5. fault flag (/oc) output fault flag output is n-mos open drain output. at detection of over-current, thermal shutdown, low level is output. over-current detection has delay filter. th is delay filter prevents instantaneous cu rrent detection such as inrush current at switch on, hot plug from being informed to outside.
technical note 10/13 bd2246g, BD2247G www.rohm.com 2011.05 - rev. a ? 2011 rohm co., ltd. all rights reserved. fig.41 over-current detection v en v out i out v /oc output shortcircuit thermal shutdown delay fig.42 over-current detection, thermal shutdown timing (bd2246g) v /en v out i out v /oc output shortcircuit thermal shutdown delay fig.43 over-current detection, thermal shutdown timing (BD2247G) v out i out v /oc t /oc over current detection i sc over current load removed i th
technical note 11/13 bd2246g, BD2247G www.rohm.com 2011.05 - rev. a ? 2011 rohm co., ltd. all rights reserved. typical application circuit controller 10k ? ~ 100k ? c l c in vin gnd en(/en) vou t / o c 5v (typ.) ferrite beads + - fig.44 typical application circuit application information when excessive current flows owing to output shortcircuit or so, ringing occurs by inductance of power source line to ic, and may cause bad influences upon ic actions. in order to avoid this case, connect a bypath capacitor c in by vin terminal and gnd terminal of ic. 1 f or higher is recommended. in order to decrease voltage fluctuations of power source line to ic, connect a low esr capacitor in parallel with c in. 10 f ~ 100 f or higher is effective. pull up /oc output by resistance 10k ? ~ 100k ? . set up value which satisfies the application as c l and ferrite beads. this system connection diagram doesn?t guar antee operating as the application. when using the circuit with changes to the external circuit c onstants, make sure to leave an adequate margin for external components including static and transitional char acteristics as well as dispersion of the ic. power dissipation characteristic (ssop5 package) fig.45 power dissipation curve (pd-ta curve) * 70mm x 70mm x 1.6mm glass epoxy board 0 100 200 300 400 500 600 700 0 25 50 75 100 125 150 ambient temperature : ta [ ] power dissipation : pd [mw] 85
technical note 12/13 bd2246g, BD2247G www.rohm.com 2011.05 - rev. a ? 2011 rohm co., ltd. all rights reserved. notes for use (1) absolute maximum ratings an excess in the absolute maximum ratings, such as supply vo ltage, temperature range of operating conditions, etc., can break down devices, thus making impossi ble to identify breaking mode such as a short circuit or an open circuit. if any special mode exceeding the absolute maximum ratings is assum ed, consideration should be given to take physical safety measures including the use of fuses, etc. (2) operating conditions these conditions represent a range within which characteri stics can be provided approximately as expected. the electrical characteristics are guaranteed under the conditions of each parameter. (3) reverse connection of power supply connector the reverse connection of power supply connector can br eak down ics. take protective measures against the breakdown due to the reverse connection, such as mounti ng an external diode between the power supply and the ic?s power supply terminal. (4) power supply line design pcb pattern to provide low impedance for the wiring between the power supply and t he gnd lines. in this regard, for the digital block power supply and the analog block powe r supply, even though these po wer supplies has the same level of potential, separate the power supply pattern for the di gital block from that for the analog block, thus suppressing the diffraction of digital noises to the analog block power supply resulting from impedance common to the wiring patterns. for the gnd line, give consideration to design the patterns in a similar manner. furthermore, for all power supply terminals to ics, mount a capacitor between the power supply and the gnd terminal. at the same time, in order to use an electrolytic capacitor, thorou ghly check to be sure the characteristics of the capacitor to b e used present no problem including the occurrence of capacity dropout at a low temperature, thus determining the constant. (5) gnd voltage make setting of the potential of the gnd terminal so that it will be maintained at the minimum in any operating state. furthermore, check to be sure no terminals are at a potential lower than the gnd voltage including an actual electric transient . (6) short circuit between terminals and erroneous mounting in order to mount ics on a set pcb, pay thorough attention to the direction and offset of t he ics. erroneous mounting can break down the ics. furthermore, if a short circuit occurs due to foreign matters entering between terminals or between the terminal and the power supply or t he gnd terminal, the ics can break down. (7) operation in strong electromagnetic field be noted that using ics in the strong elec tromagnetic field can malfunction them. (8) inspection with set pcb on the inspection with the set pcb, if a capacitor is connec ted to a low-impedance ic terminal, the ic can suffer stress. therefore, be sure to discharge from the set pcb by each proc ess. furthermore, in order to mount or dismount the set pcb to/from the jig for the inspection process, be sure to turn off the power supply and then mount the set pcb to the jig. after the completion of the inspection, be sure to turn off the power supply and then di smount it from the jig. in addition, for protection against static electricity, establis h a ground for the assembly process and pay thorough attention to the transportation and t he storage of the set pcb. (9) input terminals in terms of the construction of ic, para sitic elements are inevitably formed in re lation to potential. the operation of the parasitic element can cause interference with circuit operation, thus resulting in a malfunct ion and then breakdown of the input terminal. therefore, pay thorough attention not to handle the input terminals, such as to apply to the input terminals a voltage lower than the gnd respectively, so that any parasitic element will operate. furthermore, do not apply a voltage to the input terminals when no power supply voltage is applie d to the ic. in addition, even if the power supply voltage is applied, apply to the input terminals a volt age lower than the power supply voltag e or within the guaranteed value of electrical characteristics. (10) ground wiring pattern if small-signal gnd and large-current gnd are provided, it will be recommended to separate the large-current gnd pattern from the small-signal gnd pattern and establish a si ngle ground at the reference poi nt of the set pcb so that resistance to the wiring pattern and voltage fluctuations due to a large current will cause no fluc tuations in voltages of the small-signal gnd. pay attention not to cause fluctuations in the gnd wiring pattern of external parts as well. (11) external capacitor in order to use a ceramic capacitor as the external capaci tor, determine the constant wi th consideration given to a degradation in the nominal capacitance due to dc bias and c hanges in the capacitance due to temperature, etc. (12) thermal shutdown circuit (tsd) when junction temperatures become detecte d temperatures or higher, the therma l shutdown circuit operates and turns a switch off. the thermal shutdown circuit is aimed at isolati ng the lsi from thermal runaway as much as possible. do not continuously use the lsi with this circuit ope rating or use the lsi assuming its operation. (13) thermal design perform thermal design in which there are adequate margins by taking into account the power dissipation (pd) in actual states of use.
technical note 13/13 bd2246g, BD2247G www.rohm.com 2011.05 - rev. a ? 2011 rohm co., ltd. all rights reserved. ordering part number b d 2 2 4 6 g - t r part no. part no. 2246 2247 package g: ssop5 packaging and forming specification tr: embossed tape and reel direction of feed 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 upper right when you hold reel on the left hand and you pull out the tape on the right hand 3000pcs tr () 1pin (unit : mm) ssop5 2.9 0.2 0.13 4 + 6 ? 4 1.6 2.8 0.2 1.1 0.05 0.05 0.05 + 0.2 ? 0.1 + 0.05 ? 0.03 0.42 + 0.05 ? 0.04 0.95 5 4 12 3 1.25max. 0.2min. 0.1 s s
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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