DIO-70040 DIOO | Alldatasheet
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Version1.3,Aug2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.JiangsuI 5.5VLowLossPowerDistributionSwitch Features Inputvoltage:2.7Vto5.5V Typical57mΩon-resistance Fivedifferentcurrentlimitversions Undervoltagelockout Overcurrent protection, short circuit protection andovertemperatureprotection Faulttime8ms(typ) withblanking Reverseblocking(nobodydiode) No reverse current when power ON or power OFF Enablepolarity: activehighor activelow Quickoutputdischarge − DIO70040H:available,ENhigh − DIO70040NH:notavailable,ENhigh − DIO70040L:available,ENlow − DIO70040NL:notavailable,ENlow Applications USBports/hubs DigitalTV Set-topboxes VOIPphones PackageInformation Part Number Package BodySize DIO70040 SOT23-5 2.93mm×1.63mm SOIC-8 4.90mm×3.90mm EP-MSOP8 3.00mm×3.00mm MSOP-8 3.00mm×3.00mm Description The DIO70040 power distribution switch is intended for applications where precision current limiting is requiredor heavy capacitiveloads andshort circuits areencountered.Thepowerswitchrisingandfalling times are controlled to minimize current surges duringturningon/off. The DIO70040 provides separately 500 mA/1 A/1.5 A/2A/2.5Afivecurrentlevels. TheDIO70040devicelimitstheoutputcurrentunder a safe level by using a constant current mode when theoutputloadexceeds thecurrentlimitthreshold. TheDIO70040is available in the SOT23-5,SOIC-8, EP-MSOP8 and MSOP-8 packages. It is rated over the-40°Cto85°Ctemperaturerange. SimplifiedSchematic
Version1.3,Aug2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.JiangsuII OrderingInformation OrderingPartNo. TopMarking MSL RoHS TA Package DIO70040HXST5 4VHXW 3 Green -40to85°C SOT23-5 Tape&Reel,3000 DIO70040NHXST5 4NHXW 3 Green -40to85°C SOT23-5 Tape&Reel,3000 DIO70040LXST5 4VLXW 3 Green -40to85°C SOT23-5 Tape&Reel,3000 DIO70040NLXST5 4NLXW 3 Green -40to85°C SOT23-5 Tape&Reel,3000 DIO70040HXSO8 D740HX 3 Green -40to85°C SOIC-8 Tape&Reel,2500 DIO70040NHXSO8 D74NHX 3 Green -40to85°C SOIC-8 Tape&Reel,2500 DIO70040LXSO8 D740LX 3 Green -40to85°C SOIC-8 Tape&Reel,2500 DIO70040NLXSO8 D74NLX 3 Green -40to85°C SOIC-8 Tape&Reel,2500 DIO70040HXXM8 D740HX 3 Green -40to85°C EP-MSOP8 Tape&Reel,3000 DIO70040NHXXM8 D74NHX 3 Green -40to85°C EP-MSOP8 Tape&Reel,3000 DIO70040LXXM8 D740LX 3 Green -40to85°C EP-MSOP8 Tape&Reel,3000 DIO70040NLXXM8 D74NLX 3 Green -40to85°C EP-MSOP8 Tape&Reel,3000 DIO70040HXMP8 D740HX 3 Green -40to85°C MSOP-8 Tape&Reel,3000 DIO70040NHXMP8 D74NHX 3 Green -40to85°C MSOP-8 Tape&Reel,3000 DIO70040LXMP8 D740LX 3 Green -40to85°C MSOP-8 Tape&Reel,3000 DIO70040NLXMP8 D74NLX 3 Green -40to85°C MSOP-8 Tape&Reel,3000
Version1.3,Aug2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.JiangsuIII OrderingInformationComplementaryNote OrderingNumber=PartNo.+H/L：Enable ActiveVersion +X：CurrentLimitVersion +PackageCode DIO70040:quickoutputdischargeavailable ST5:standsforSOT23-5 DIO70040N:quickoutputdischargenotavailable SO8:standsforSOIC-8 XM8:standsforEP-MSOP8 H:Enableactivehigh MP8:standsforMSOP-8 L:Enableactivelow A:500mAcurrentlimitversion(typ) B:1Acurrentlimitversion(typ) C:1.5Acurrentlimitversion(typ) D:2Acurrentlimitversion(typ) E:2.5Acurrentlimitversion(typ) If you encounter any issue in the process of using the device, please contact our customer service at marketing@dioo.com or phone us at (+86)-21-62116882. If you have any improvement suggestions regarding the datasheet, we encourage you to contact our technical writing team at docs@dioo.com. Your feedback is invaluable for us to provide a better user experience.
Version1.3,Aug2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu IV TableofContents ListofFigures
Version1.3,Aug2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu2 2. AbsoluteMaximumRatings ExceedingthemaximumratingslistedunderAbsoluteMaximumRatingswhendesigningislikelytodamagethe devicepermanently. Donotdesigntothemaximumlimitsbecauselong-timeexposuretothemmightimpactthe device’s reliability. The ratings are obtained over an operating free-air temperature range unless otherwise specified. Symbol Parameter Rating Unit VIN Inputvoltage -0.3to6.0 VVEN Operationvoltage(EN activehigh) -0.3toVIN + 0.3 Operationvoltage(Allotherpins) -0.3to6.0 TJ Maximumjunctiontemperature 150 °C TSTG Storagetemperature -65to150 °C TL Maximumleadtemperature(Soldering,10sec) 260 °C 3. RecommendedOperatingConditions Recommendedoperatingconditionsarespecifiedtoensureoptimalperformancetothedatasheetspecifications. Theratingsareobtainedover anoperatingfree-airtemperaturerange unlessotherwisespecified. Symbol Parameter Rating Unit VIN Inputvoltage 2.7to5.5 V Terminalvoltageatallotherpins 0to5.5 V TJ Junctiontemperaturerange -40to125 °C TA Ambienttemperaturerange -40to85 °C 4. ESDRatings Whenastatically-chargedperson or objecttouches anelectrostatic discharge sensitive device,the electrostatic charge might be drained through sensitive circuitry in the device. If the electrostatic discharge possesses sufficientenergy,damagemightoccurtothedeviceduetolocalizedoverheating. Model Condition Value Unit Human-bodymodel ANSI/ESDA/JEDEC JS-001 ±2 kV Charged-devicemodel ANSI/ESDA/JEDEC JS-002 ±2 kV
Version1.3,Aug2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu3 5. ThermalConsiderations The thermal resistance determines the heat insulation property of a material. The higher the thermal resistance is, the lower the heat loss. Accumulation of heat energy degrades the performance of semiconductor components. Symbol Metric Value Unit RθJA Junction-to-ambient thermalresistance SOT23-5 250 °C/W SOIC-8 130 EP-MSOP8 100 MSOP-8 166
Version1.3,Aug2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu4 6. ElectricalCharacteristics TA =25°C,VIN =5V,unlessotherwisespecified. Symbol Parameter Conditions Min Typ Max Unit VIN Inputvoltagerange 2.7 5.5 V ISHDN Shutdowninputcurrent Openload,ICdisabled 0.2 1 µA IQ Quiescentsupplycurrent Openload,ICenabled 36 60 µA RDS(ON) FETRON IOUT =100mA,TA =25°C 57 70 mΩ IOUT =100mA,TA =-40~85°C 57 80(1) VEN(H) ENrisingthreshold VIN =2.7Vto5.5V 0.85 V VEN(L) ENfallingthreshold VIN =2.7Vto5.5V 0.4 V IEN ENleakagecurrent VEN =5.0V 1 µA VIN_UVLO INUVLO threshold 2.5 V VIN_HYS(1) INUVLO hysteresis 150 400 mV ILIM Currentlimit DIO70040-A 0.46 0.5 0.54 A DIO70040-B 0.95 1 1.05 DIO70040-C 1.38 1.5 1.62 DIO70040-D 1.88 2 2.12 DIO70040-E 2.35 2.5 2.65 Outputreversevoltagefault deglitchtime 2.5 4 7 ms ISHORT(1) Short-circuitcurrentlimit Enabled,output shorttoground 10% ILIM tON ENturn-ontime RL =10Ω,COUT = 1μF 400 µs tOFF ENturn-offtime RL =10Ω,COUT = 1μF 7 µs tR Outputturn-onrisetime RL =100Ω,90%settling 0.6 ms tF Outputturn-offtime RL =100Ω,10%settling 0.3 ms TSD Thermalshutdowntemperature 140 °C Thermalshutdownhysteresis 20 °C RDIS Dischargeresistance 500 Ω Vreverse Reversevoltagecomparatortrip point 175 mV Note: (1) Guaranteedbydesign. (2) Specificationssubjecttochangewithoutnotice.
Version1.3,Aug2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu7 8. BlockDiagram
Version1.3,Aug2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu8 9. ApplicationInformation Important notice: Validation and testing are the most reliable ways to confirm system functionality. The applicationinformation isnotpartofthespecificationandis forreferencepurposesonly. 9.1. Powersupplyconsiderations A 10 μF ceramic capacitor from VIN to GND to prevent the input voltage from dropping during the hot-plug condition is strongly recommended. However higher capacitance could help reduce the voltage drop. Further more, bypassing the output with a 10 μF ceramic capacitor improves the immunity of the device to short-circuit transients, because an output short will cause ringing on the input without the input capacitor. It could destroy the internal circuitry when the input transient voltage exceeds the absolute maximum supply voltage even for a shortduration. 9.2. Undervoltagelockout The undervoltage lockout (UVLO) circuit disables the power switch until the input voltage reaches the UVLO turn-on threshold. Built-in hysteresis prevents unwanted on / off cycling due to input voltage drop from large currentsurges. 9.3. Enable Thelogic enable controls thepower switch,driver,and other circuitry toreduce thesupply current.The EN/EN control pin must be driven to a logic high or logic low for a clearly defined signal input. Floating these control linesmaycauseunpredictableoperation. 9.4. Overcurrentprotection The DIO70040 responds to over current conditions by limiting output current to the ILIM levels. When an over current condition is detected, the device maintains a constant output current and reduces the output voltage accordingly.Completeshutdownoccursonlyifthefaultis presentlongenough toactivate thermallimit. Three possible overload conditions can occur.In the firstcondition, the output has been shorted to GND before the device is enabled or before VIN has been applied. The DIO70040 senses the short circuit and immediately clampsoutputcurrenttoacertain safelevel. Inthesecondcondition,anexcessiveloadoccurswhilethedeviceisenabled.Whentheexcessiveloadoccurs, veryhighcurrentsmayflowforashorttimebeforethe currentlimitcircuitcanreact.Afterthecurrentlimitcircuit has tripped (reached the overcurrent trip threshold) the device switches into constant current mode to limit the currentclosetoILIM. Inthethirdconditiontheloadisgraduallyincreasingbeyondtherecommendedoperatingcurrent.Thecurrentis permitted to rise until the current limit threshold (ILIM) is reached or until the thermal limit of the device is exceeded.TheDIO70040iscapableofdeliveringcurrentuptothecurrentlimitthreshold(ILIM)withoutdamaging thedevice.Oncethethresholdhas beenreached,thedeviceswitchesintoits constantcurrentmode.
Version1.3,Aug2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu9 9.5. Thermalprotection Thermal protection prevents damage to the IC when heavy overload or short circuit conditions are present for extendedperiodsoftime.TheconditionsforcetheDIO70040intoconstantcurrentmode,andundershortcircuit conditions, the voltage across the switch is equal to the input voltage. The increased dissipation causes the junction temperature to rise to high levels. The protection circuit senses the junction temperature of the switch and shuts it off. Hysteresis is built into the thermal sense circuit, and after the device has cooled approximately 20degrees,theswitchturns backon.Theswitchcontinuestocycleinthisway untiltheoverloador inputpower isremoved. 9.6. Reverse-voltageprotection The reverse-voltage protection feature turns off the P-channel MOSFET whenever the output voltage exceeds theinputvoltageby175mV(typ).Areversecurrentof(VOUT -VIN)/RDS(ON) willbepresentwhenthisoccurs.This preventsdamagetodevicesontheinputsideoftheDIO70040bypreventingsignificantcurrentfromsinkinginto the input capacitance. The DIO70040 devices allow the P-channel MOSFET to turn on once the output voltage goesbellowtheinputvoltage. 9.7. FLG output Error flag is an open-drain output of a N-channel MOSFET. If current limiting or short circuit occurs, FLG is pulled low after a delay of 8 ms (typ), and if no current limiting or short circuit occurs, FLG is pulled high after a delay of 8 ms (typ). If reverse-voltage protection occurs, FLG is pulled low after a delay of 4 ms (typ), and if no reverse-voltage protection occurs, FLG is pulled high after a delay of 4 ms (typ). If overtemperature protection occurs, FLG is pulled low immediately, and if no overtemperature protection occurs, FLG ispulled high afteradelay of8ms(typ).
Version1.3,Aug2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu10 10.PhysicalDimension 10.1. SOT23-5 Common Dimensions (Unitsofmeasure=Millimeter) Symbol Min Nom Max A - - 1.25 A1 0 - 0.15 A2 1.00 1.10 1.20 A3 0.60 0.65 0.70 b 0.36 - 0.45 b1 0.35 0.38 0.41 c 0.14 - 0.20 c1 0.14 0.15 0.16 D 2.826 2.926 3.026 E 2.60 2.80 3.00 E1 1.526 1.626 1.726 e 0.90 0.95 1.00 e1 1.80 1.90 2.00 K 0 - 0.25 L 0.30 0.40 0.60 L1 0.59REF L2 0.25BSC M 0.10 0.15 0.25 R 0.05 - 0.20 R1 0.05 - 0.20 θ 0° - 8° θ1 8° 10° 12° θ2 10° 12° 14°
Version1.3,Aug2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu11 10.2. SOIC-8 Common Dimensions (Unitsofmeasure= Millimeter) Symbol Min Nom Max A 1.35 1.55 1.75 A1 0.10 - 0.25 A2 1.30 1.40 1.50 A3 0.50 0.60 0.70 b 0.38 - 0.47 b1 0.37 0.40 0.43 c 0.17 - 0.25 c1 0.17 0.20 0.23 D 4.80 4.90 5.00 E 5.80 6.00 6.20 E1 3.80 3.90 4.00 e 1.17 1.27 1.37 L 0.45 0.60 0.80 L1 1.04REF L2 0.25BSC R 0.07 - - R1 0.07 - - h 0.30 0.40 0.50 θ 0° - 8° θ1 15° 17° 19° θ2 11° 13° 15°
Version1.3,Aug2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu12 10.3. MSOP-8 CommonDimensions (Unitsofmeasure=Millimeter) Symbol Min Nom Max A - - 1.10 A1 0.05 0.10 0.15 A2 0.75 0.85 0.95 A3 0.30 0.35 0.40 b 0.25 - 0.38 b1 0.24 0.30 0.33 c 0.15 - 0.20 c1 0.14 0.15 0.16 D 2.90 3.00 3.10 E 4.75 4.90 5.05 E1 2.90 3.00 3.10 e 0.55 0.65 0.75 L 0.40 0.55 0.70 L1 0.95REF L2 0.25BSC R 0.07 - - R1 0.07 - - θ 0° - 8° θ1 9° 12° 15°
Version1.3,Aug2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu13 10.4. EP-MSOP8 CommonDimensions (Unitsofmeasure=Millimeter) Symbol Min Nom Max A - - 1.10 A1 0.05 0.10 0.15 A2 0.75 0.85 0.95 A3 0.30 0.35 0.40 b 0.25 - 0.38 b1 0.24 0.30 0.33 c 0.13 - 0.20 c1 0.13 0.15 0.16 D 2.90 3.00 3.10 D1 1.92 2.07 2.22 E 4.75 4.90 5.05 E1 2.90 3.00 3.10 E2 1.45 1.60 1.75 e 0.55 0.65 0.75 L 0.40 0.55 0.70 L1 0.95REF L2 0.25BSC R 0.07 - - R1 0.07 - - θ 0° - 8° θ1 9° 12° 15°
Version1.3,Aug2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu14 Disclaimer This specification and information contained herein are provided on an “AS IS” basis and WITHALLFAULTS.Allproductspecifications,statements,information,anddata(collectively, the “Information”) in this datasheet or made available on the website of www.dioo.com are subject to change without notice. The customer is responsible for checking and verifying the extenttowhichtheInformationcontainedinthispublicationisapplicabletohis/herapplication. AllInformationgivenhereinisbelievedtobeaccurateandreliable,butitispresentedwithout guarantee,warranty,orresponsibilityofanykind,expressorimplied.