DIA7976APAACD6 | DigiCamel IC Datasheet

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Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.JiangsuI 500mA,High-AccuracyLDOwith Power-GoodforAutomotiveApplication  Features  AEC-Q100qualified: − Deviceambienttemperature: -40°C≤TA ≤125°C − Devicejunction temperature: -40°C≤TJ ≤150°C  Operatinginputvoltagerange:1.7Vto6.0V  Operatingoutputvoltagerange: − Fixedoptions:0.65Vto5.0V − Adjustableoption:0.55 Vto5.5V  HighPSRR:64dBat1kHz  Power-goodoutputoptions: − Open-drain:DIA7976AO andDIA7976BO − Push-pull:DIA7976APand DIA7976BP  Outputaccuracy: − ±1% atTA =25°C − ±1.5% at-40°C≤TA ≤85°C − ±2% at-40°C≤TA≤125°C  Ultra-lowdropout: − 150mVat500mA,VOUT =3.3V  Lowquiescentcurrent： − 27µAtypicalatnoload − 100nAshutdownmodetypicalcurrent  Activeoutputdischarge:DIA7976A  Non-activeoutputdischarge:DIA7976B  Stablewitha1µF orlargercapacitor  Applications  Automotiveheadunits  Frontand rearcameras  Automotiveclusterdisplays  Telematicscontrolunits  Medium,shortrangeradar  PackageInformation PartNumber Package BodySize DIA7976 DFN6 2mm×2mm DFN8 3mm×3mm SOT23-5 2.9mm×1.6mm  Description The DIA7976 is a 500 mAultra-low-dropout regulator with power-good function. The DIA7976 is designed for applications requiring low quiescent current and provides fast line and load transient performance. Additionally, DIA7976 features high Power Supply RippleRejection(PSRR)atupto500mA. The DIA7976 operates with an input voltage range from 1.7 V to 6.0 V and the output voltage is adjustablefrom0.55Vto5.5V. The DIA7976 is stable with small ceramic output capacitors, allowing for a small overall solution size. An error amplifier and precision band-gap provide an accuracy of ±2% over temperature. The DIA7976 helps reduce the thermal dissipation during short-circuit events with internal short-current limit. The device also contains integrated thermal shutdown, current limit, and undervoltage lockout (UVLO) features.  SimplifiedSchematic

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu II  OrderingInformation OrderingPartNo. Top Marking MSL Description RoHS TA Package DIA7976AOaaCD6 YWXZ GF5XO Active Discharge Green -40to125°C DFN2*2-6 Tape&Reel,3000 DIA7976APaaCD6 YWXZ GF5XP

1 Green -40to125°C DFN2*2-6 Tape&Reel,3000

1 Green -40to125°C DFN3*3-8 Tape&Reel,3000

DIA7976AaaST5 A5XYW 1 Green -40to125°C SOT23-5 Tape&Reel,3000 DIA7976AOADJCD6 YWXZ GF5XO DIA7976AADJST5 A5XYW 1 Green -40to125°C SOT23-5 Tape&Reel,3000 DIA7976BOaaCD6 YWXZ GF7XO Non-Active Discharge Green -40to125°C DFN2*2-6 Tape&Reel,3000 DIA7976BPaaCD6 YWXZ GF7XP DIA7976BaaST5 A7XYW 1 Green -40to125°C SOT23-5 Tape&Reel,3000 DIA7976BOADJCD6 YWXZ GF7XO DIA7976BADJST5 A7XYW 1 Green -40to125°C SOT23-5 Tape&Reel,3000

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu III OutputVoltageOptions OptionCode “aa” 08 10 11 12 15 18 25 28 30 33 36 50 Marking Definition:GF5XO/GF5XP/A5XYW/GF7XO/GF7XP/A7XYW YWXZ YWXZ:Yearcode;Weekcode;Factorycode;Internalcode GF5XO GF:Productcode;5:Productcode;X:Voltagecode;O:Open-drainversion. GF5XP GF:Productcode;5:Productcode;X:Voltagecode;P:Push-pullversion. A5XYW A:Productcode; 5:Productcode;X:Voltagecode;Y:Yearcode;W:Weekcode. GF7XO GF:Productcode;7:Productcode;X:Voltagecode;O:Open-drainversion. GF7XP GF:Productcode;7:Productcode;X:Voltagecode;P:Push-pullversion. A7XYW A:Productcode; 7:Productcode;X:Voltagecode;Y:Yearcode;W:Weekcode. VoltageCode OptionCode“X” C D E F G H J K L M N P Q 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.

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu PinName Description EN Enable pin. Drive EN greater than VEN(HI) to turn on the regulator. Drive EN less than VEN(LO) to put the low-dropoutregulator(LDO)intoshutdownmode. FB This pin is used as an input to the control loop error amplifier and is used to set the output voltage of the LDO. GND Groundpin. IN Input pin. For best transient response and to minimize input impedance, use the recommended value or larger ceramic capacitor from IN to ground as listed in the Recommended Operating Conditions table. Placetheinputcapacitorasclosetotheoutputofthedeviceaspossible. NC Nointernal connection.Groundthispinforbetterthermalperformance. OUT Regulated output voltage pin. A capacitor is required from OUT to ground for stability. For best transient response,usethenominalrecommendedvalueorlargerceramiccapacitorfromOUTtoground;Placethe outputcapacitorasclosetotheoutputofthedeviceaspossible. PG Power-goodoutput.Availableinopen-drainandpush-pulltopologies.Apull-upresistorisonlyrequiredfor the open-drain type. For the open-drain version (DIA7976AO and DIA7976BO), if the power-good functionalityisnotbeingused,groundthispinorleavefloating.Forthepush-pullversion(DIA7976APand DIA7976BP),ifthepower-goodfunctionalityisnotbeingused,leavethispinfloating. ThermalPad Thethermalpadisleftfloating.ConnecttotheGNDplaneforimprovedthermalperformance.

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu 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 Supplyvoltage -0.3to6.6 V VEN Enablevoltage -0.3to6.6 VFB Feedbackvoltage -0.3to2 VPG Power-goodvoltage -0.3to6.6 VOUT Outputvoltage -0.3toVIN +0.3(1) IOUT Outputcurrent Internallylimited IPG Power-goodcurrent -10to10 mA TJ Operatingjunctiontemperature -40to150 TSTG Storagetemperature -65to150 Note: (1) TheabsolutemaximumratingisVIN +0.3Vor6.0V,whicheverissmaller. 3. RecommendedOperatingConditions Recommendedoperatingconditionsarespecifiedtoensureoptimalperformancetothedatasheetspecifications. Theratingsareobtainedover anoperatingfree-airtemperaturerange unlessotherwisespecified. Symbol Parameter Rating Unit VIN Inputvoltage 1.7to6.0 V VOUT Outputvoltage Adjustableonly 0.55to5.5 V Fixedonly 0.65to5.0 V IOUT Outputcurrent 0to500 mA CIN Inputcapacitor ≥1 μF COUT Outputcapacitor(1) 1to22 μF CFF Feed-forwardcapacitor 10 nF VEN Enablevoltage 0to6 V VPG PGvoltage 0to6 V TJ Junctionoperatingtemperature -40to150 °C Note: (1) Minimumderatedcapacitanceof0.47µFisrequiredforstability.

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu 4. ESDRatings When astatically-charged personor objecttouches an electrostatic discharge sensitive device, the electrostatic charge might be drained through sensitive circuitry in the device. If the electrostatic discharge possesses sufficientenergy,damagemightoccurtothedeviceduetolocalizedoverheating. Symbol Condition Value Unit HBM JEDECJS-001 ±4000 V CDM JEDECJS-002 ±2000 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 ThermalMetric DFN6 DFN8 SOT23-5 Unit RθJA Junction-to-ambientthermalresistance 96.6 82.43 150 °C/W RθJC(top) Junction-to-case(top)thermalresistance 36.03 32.11 93.1 °C/W

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu 6. ElectricalCharacteristics Atoperatingtemperaturerange (TA = -40°Cto125°C),VIN=VOUT(NOM) + VDO or1.7V(whichever is greater),IOUT =1mA,VEN =VIN,andCIN =COUT =1μF,unless otherwisenoted;all typicalvaluesareatTA =25°C. Symbol Parameter TestConditions Min Typ Max Unit VFB Feedbackvoltage Adjustableonly 0.539 0.55 0.561 V VOUT Outputaccuracy(1) TA =25°C -1 1 % LineReg Lineregulation VOUT(NOM) +VDO ≤VIN(2) ≤6.0V 0.1 0.3 %/V LoadReg Loadregulation 0.1mA≤IOUT≤500mA,VIN ≥2.0V 0.04 V/A IQ Quiescentcurrent IOUT =0mA TA =25°C 27 45 µA -40°C≤TA ≤125°C 27 50 ISHDN Shutdowncurrent VEN ≤0.3V,1.7V≤VIN ≤6.0V, -40°C≤TA≤125°C 0.1 1 µA IFB Feedbackpincurrent Adjustableonly 0.01 0.1 µA ICL Outputcurrentlimit VOUT(NOM) <1.0V, VOUT =VOUT(NOM) -0.2V,VIN =2.0V 515 720 1000 mA VOUT(NOM) ≥1.0V,VOUT =VOUT(NOM) × 0.85, VIN =VOUT(NOM) +1.0V ISC Short-circuitcurrent limit VOUT =0V VOUT(NOM) < 1.0V, VIN =2.0V 200 300 400 mA VOUT(NOM) ≥1.0V, VIN =VOUT(NOM) +1.0V VDO Dropoutvoltage IOUT =500mA, VOUT =0.95× VOUT(NOM) VOUT =1V 830 mV VOUT =1.2V 650 VOUT =1.5V 400 VOUT =1.8V 270 VOUT =2.5V 185 VOUT =3.3V 150 200 VOUT =3.6V 118 VOUT =5.5V 115 PSRR Power-supply rejectionratio VOUT =0.55V, VIN =2.0V, IOUT =10mA, COUT =2.2µF f=1kHz 64 dBf=100kHz 50 f=1MHz 75

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu VN Outputnoisevoltage BW=10Hzto100kHz, VOUT =0.55V,VIN =2.0V 40 µVRMS VUVLO Undervoltagelockout VIN falling 1.17 1.27 1.48 V VIN rising 1.21 1.32 1.55 VUVLO, HYST Undervoltagelockout hysteresis VIN hysteresis 50 mV tSTR Startuptime FromENlow-to-hightransitionto VOUT =VOUT(NOM) ×0.95 200 450 800 µs VEN(HI) ENpinhighvoltage enabled 1 V VEN(LO) ENpinlowvoltage disabled 0.3 V IEN Enablepincurrent VIN =VEN =6.0V 10 nA RPULLDOWN Pulldownresistance (onlyforDIA7976A) VIN =6.0V 100 Ω PGHTH PGhighthreshold VOUT increasing 89 92 96 %VOUT PGLTH PGlowthreshold VOUT decreasing 86 90 93 %VOUT PGHYST PGhysteresis 2 %VOUT VOL(PG) PGpinlow-level outputvoltage VIN ≥1.7V,ISINK = 1.0mA 400 mV VIN ≥2.75V,ISINK =2.0mA VOH(PG) PGpinhigh-level outputvoltage(3) VOUT ≥1.0V,ISOURCE = 0.04mA 0.8x VOUT V VOUT ≥1.4V,ISOURCE = 0.2mA VOUT ≥2.5V,ISOURCE = 0.5mA VOUT ≥4.5V,ISOURCE = 1.0mA lkg(PG) PGpinleakage current(4) VOUT >PGHTH,VPG =6.0V 7 50 nA TSD Thermalshutdown Shutdown,temperatureincreasing 165 Reset,temperaturedecreasing 150 tPGDH PGdelaytimerising timefrom92% VOUT to20%ofPG(5) 165 µs tPGDL PGdelaytimefalling timefrom90% VOUT to80%ofPG(5) 12 Note: (1) WhenthedeviceisconnectedtoexternalfeedbackresistorsattheFB pin,externalresistortolerancesarenot included. (2) VIN = 1.7VforVOUT(NOM) +VDO <1.7V. (3) Push-pullversiononly.Thepush-pull optionissupportedonlyforVOUT ≥1.0V. (4) Open-drainversiononly. (5) Outputoverdrive=10%. (6) Specificationssubjecttochangewithoutnotice.

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu 7. TypicalCharacteristics Figure1.Dropoutvoltagevs.IOUTatVOUT = 3.3V Figure2.Dropoutvoltagevs.IOUT atVOUT = 5.5V VOUT =0.55V,IOUT =0mA Figure3.IGND vs.VIN VIN =2V,VOUT =0.55V,COUT =2.2µF Figure4.PSRRvs.Frequencyand IOUT VOUT =0.55V,IOUT =1mA Figure5.Outputvoltagevs.Temperature VOUT = 5.5V,IOUT =1mA Figure6.Outputvoltagevs.Temperature

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu VIN =6V Figure7.Outputvoltagevs.Outputcurrent VIN =3.8V Figure8.Outputvoltagevs.Outputcurrent IOUT = 500mA Figure9.Dropoutvoltagevs.Outputvoltage VEN =0V Figure10. Shutdowncurrentvs.Inputvoltage Figure11.Groundpincurrentvs.Outputcurrent VOUT =0.55V,IOUT =1mA Figure12.Outputvoltagevs.Inputvoltage

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu VOUT = 0.55V,VIN =2V<->6Vat1V/µs, IOUT =1mA Figure13.Linetransient VIN =6V,VOUT = 5.5V,1mA<->500mAat1µs Figure14.Load transient VIN =6V,VOUT =5.5V,IOUT = 500mA Figure15. StartupwithEN VIN =6V,VOUT = 5.5V,IOUT =500mA Figure16.PowerupwithVIN

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu 9. FunctionDescription 9.1.Overview The DIA7976 is a low-dropout regulator (LDO) that consumes a low quiescent current and delivers an excellent line and load transient performance. These characteristics, combined with low noise and high PSRRwith lowdropoutvoltage, makethisdeviceideal forautomotiveapplications. This regulator offers short-current limit, shutdown, and thermal protection. The operating junction temperature forthisdeviceis-40°Cto150°C. 9.2.Undervoltagelockout(UVLO) TheDIA7976containsanundervoltagelockout(UVLO)circuitthatensuresthatthedeviceisfunctionalwhenthe supply voltage is lower than the operational range of the internal circuitry, which disables the output until the input voltage is greater than the rising UVLO voltage (VUVLO). When VIN is less than VUVLO, the output is connected to the ground with a pulldown resistor (RPULLDOWN). When the device enters UVLO, the PG output is pulledlow. 9.3.Shutdown Theenablepin (EN)isactivehigh.ForcingtheENpin toexceedVEN(HI) willenable thedeviceforcingtheENpin todropbelowVEN(LO)willturnoffthedevice.ConnectENtoINwhenshutdowncapabilityisnotrequired.ThePG output pin is pulled low when the device is disabled. The DIA7976 has an internal pulldown MOSFET that connects an RPULLDOWN resistor to the ground when the device is disabled. Output capacitance (COUT) and the load resistance (RL) in parallel with the pulldown resistor (RPULLDOWN ) decide the discharge time after disabling. Theequation belowcalculates thetimeconstant: T=(RPULLDOWN ×RL)/(RPULLDOWN +RL)×COUT (1) 9.4.Currentlimit The device is protected during transient high-load current faults or shorting events by an internal current limit circuit.Thecurrentlimitisahybridschemethattransitionsfromacurrent-limitschemetoashort-limitschemeat the voltage about 0.3 V.When the output is shorted, the device supplies a typical current called the short-circuit current limit (ISC). In a high-load current fault with the output voltage above 0.3 V,the current-limit scheme limits theoutput currenttoICL.Whenthe voltage drops below0.3V,ashort-currentlimitactivates thatscales backthe currentastheoutputvoltageapproaches GND. When the device is within the current limit, the output voltage is not regulated. The device begins to heat up whenacurrentlimiteventoccurs,andifathermalshutdownistriggered,thedeviceturnsoff.Whenthedeviceis in current-limit, the pass transistor dissipates power [(VIN - VOUT) × ICL]. When the device output is shorted and theoutputisbelow 0.3V,the passtransistor dissipates power [(VIN -VOUT) ×ISC].Theinternalthermalshutdown circuit turns the device back on after the device cools down. The device cycles between the current limit and thermalshutdownifthe outputcurrentfaultconditioncontinues.

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu Figure21.Currentlimit 9.5.Power-goodfunction(PG) To indicate the status of the output voltage, the power-good circuit monitors the voltage at the FB pin. If the output voltage is below PGLTH (PG low threshold), the PG pin open-drain output activates and pulls the PG pin close to GND. If the output voltage is higher than PGHTH (PG high threshold), then the PG pin will be high impedance. A pull-up resistor is needed for the open-drain output. Any downstream device can receive power-good as a logic signal for sequencing through attaching a pull-up resistor to an external supply. Furthermore, the open-drain output may be linked to other open-drain outputs to implement AND logic. Check to see if the externalpull-upsupplyvoltageproducesavalidlogicsignalforthereceivingdevice.Itisadvisedtouseapull-up resistor ranging from 10 kΩ to 100 kΩ. While for push-pull PG option, the pull-up resistor is not needed. The push-pull PG option has a high logic signal correlating with the output voltage. Thepush-pull option is only valid forVOUT ≥1Vandpleasedonotlinkthepush-pull outputtootherlogic outputs. If CFF (feed-forward capacitor) is used, the time constant for the LDO start-up is increased while the time constant for PG output remains unchanged, which may leading to an invalid PG output. To avoid the situation, DIOOrecommendtoensurethe timeconstantof bothLDO start-upand PG outputmatchby addingacapacitor inparallelwiththepower-goodpull-up resistor. To makethe PG valid, the device should operate above the minimum VIN and PG is asserted, regardless of the output voltage state when VIN is below VUVLO minus VUVLO, HYST. When VIN falls below about 0.8 V, power-good device turns on and the power-good output pulls high because of no enough gate drive voltage to keep the open-drain.Thiseffectcanbeminimized byconnectingthePG pull-upresistortotheoutputvoltage. 9.6.Thermalshutdown TheDIA7976 has athermal shutdown protection featurethat disables thedevice when thejunction temperature risestoapproximately165°C.Thisfeaturehelpstoreducethepowerdissipatedbythedevice,allowingittocool down. When the temperature falls to approximately 150°C, the output circuitry is re-enabled. However, depending on various factors like power dissipation, thermal resistance, and ambient temperature, the thermal

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu protection circuit may turn on and off repeatedly.This cycling helps to limit regulator dissipation and protect the regulator from overheating damage. Activating the thermal shutdown feature usually indicates excessive power dissipation as a result of the product of the (VIN - VOUT) voltage and the load current. For reliable operation, limit junction temperature to 150°C maximum. To estimate the margin of safety in a complete design, increase the ambienttemperatureuntilthethermalprotectionistriggered,useworst-caseloads andsignal conditions. The DIA7976 has a built-in protection circuit that guards against overload conditions. However,it's not meant to be triggered during regular operation. Running the device continuously into thermal shutdown can harm the device'sreliability. 9.7.Devicefunctionalmodes TheDevicefunctionalmodestableshows theconditionsthatleadtothedifferentmodes ofoperation. Table1.Devicefunctionalmodes Operating Mode VIN VEN IOUT TJ Normaloperation VIN > VOUT(nom) +VDO andVIN >VIN(min) VEN >VEN(HI) IOUT <IOUT(max) TJ <TSD(shutdown) Dropoutoperation VIN(min) <VIN <VOUT(nom) +VDO VEN >VEN(HI) IOUT <IOUT(max) TJ <TSD(shutdown) Disabled(anytruecondition disablesthedevice) VIN <VUVLO VEN <VEN(LOW) Notapplicable TJ >TSD(shutdown) Note: (1)SeetheElectricalCharacteristicstableforparametervalues. 9.8.Dropoutoperation If all conditions are met for normal operation but the input voltage is lower than the nominal output voltage plus the specified dropout voltage, the device operates in dropout mode. During dropout mode, the output voltage trackstheinputvoltageandthetransientperformanceofthedevicebecomessignificantlydegradedandactsas aswitchLineorloadtransients indropoutcanresultinlarge output-voltagedeviations. When the device is in dropout, VIN < VOUT(NOM) + VDO, directly after being in a normal regulation state, but not during startup, the pass transistor is driven into the ohmicor triode region.The outputvoltage can overshoot for ashortperiodwhilethedevicepullsthepasstransistorbackintothelinearregionwhentheinputvoltagereturns toavaluegreater thanorequaltothenominaloutputvoltage plusthe dropoutvoltage(VOUT(NOM) +VDO). 9.9.Disabled Shuttingdowntheoutputofthedevicewillrequireforcingthevoltageoftheenablepintolessthanthemaximum EN pin low-level input voltage. The pass transistor is turned off internal circuits are shutdown, and the output voltage is actively discharged to the ground by an internal discharge circuit from the output to the ground, when thedeviceisdisabled.

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu 10.ApplicationInformation Important notice: Validation and testing are the most reliable ways to confirm system functionality. The applicationinformation isnotpartofthespecificationandis forreferencepurposesonly. 10.1.Applicationexamples Figure22.Typicalapplication:adjustablevoltage Figure23.Typicalapplication:fixedvoltage 10.2.Adjustabledevicefeedbackresistors Figure22shows thattheoutputvoltageoftheDIA7976canbeadjusted from0.55Vto5.5Vbyusingaresistor dividernetwork. The adjustable version DIA7976 requires external feedback divider resistors to set the output voltage. The feedbackdivider resistors,R1 andR2 settheVOUT,according tothe followingequation: VOUT =VFB ×(1+R1/R2) (2) Setting the feedback divider current to 100x the FB pin current listed in the Electrical Characteristics table can ignore the FB pin current error term in the VOUT equation, which provides the maximum feedback divider series resistance,asshowninthefollowingequation: R1 +R2 ≤VOUT /(IFB ×100) (3)

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu Table2.RecommendedresistorsforDIA7976(Adjustableversion) VOUT (V) R1 (kΩ) R2 (kΩ) 0.55 0 Float 1 8.2 10 1.2 18.2 15.4 1.5 21 12.1 1.8 27.4 12 2.5 39 11 3.3 49.9 10 5.5 18 2 10.3. Dropoutvoltage A PMOS pass transistor is used to achieve low dropout. The PMOS pass device is in the linear region of operation and the input-to-output resistance is the RDS(ON) of the PMOS pass element when (VIN - VOUT) is less than the dropout voltage (VDO).The PMOS device behaves like a resistor in dropout mode therefore VDO scales approximatelywiththeoutputcurrent.PSRRandtransientresponsedegradeas(VIN -VOUT)approachesdropout operationwith anylinearregulator. 10.4.Exitingdropout Aramping input supply causes an LDO to overshoot on start-up, as shown in Figure 24 when the slew rate and voltagelevelsareinthecorrectrange.Useanenablesignaltoavoidthiscondition. Figure24.Start-upintodropout Overshooting on the output of the regulator can be caused by the error amplifier having to drive the gate capacitance of the pass element and bring the gate back to the correct voltage for proper regulation. The gate voltage (VGS) is pulled all the way down to the ground to give the pass device the lowest on-resistance possible when the LDO is placed in dropout. However, the output will overshoot until the loop responds and the output currentpullstheoutputvoltagebackdownintoregulationifalinetransientoccurswhenthedeviceisindropout. Continue to add input capacitance in the system until the transient is slow enough to reduce the overshoot if thesetransientsarenotacceptable.

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu 11.PhysicalDimensions 11.1.DFN2*2-6 CommonDimensions (Unitsofmeasure=Millimeter) Symbol Min Nom Max A 0.70 0.75 0.80 A1 0.00 0.02 0.05 A3 0.203REF A3s 0.10 - - b 0.25 0.30 0.35 D 1.90 2.00 2.10 E 1.90 2.00 2.10 D2 0.80 0.90 1.00 E2 1.50 1.60 1.70 e 0.55 0.65 0.75 L 0.25 0.30 0.35 Ls 0.05REF M 0.20REF

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu 11.2.DFN3*3-8 CommonDimensions (Unitsofmeasure= Millimeter) Symbol Min Nom Max A 0.80 0.85 0.90 A1 0.00 0.02 0.05 A3 0.203REF b 0.25 0.30 0.35 D 2.90 3.00 3.10 E 2.90 3.00 3.10 D2 1.50 1.60 1.70 E2 2.30 2.40 2.50 e 0.55 0.65 0.75 H 0.30REF K 0.20 0.30 0.40 L 0.30 0.40 0.50 R 0.15REF

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu 11.3.SOT23-5 CommonDimensions (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°

Version1.9,Apr2025 www.dioo.com ©2025DiooMicrocircuitsCo.,Ltd.Jiangsu Disclaimer This specification and information contained herein are provided on an “AS IS” basis and WITHALLFAULTS.Allproduct specifications,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,butit ispresentedwithout guarantee,warranty,orresponsibilityofanykind,expressorimplied.

Product Information

DIA7976APAACD6 specifications and overview.

Summary

500 mA, High-Accuracy LDO with Power-Good for Automotive Application Apr 2025

Description

500 mA, High-Accuracy LDO with Power-Good for Automotive Application Apr 2025

Source title DIA7976APAACD6 Datasheet(PDF) - DIOO MICROCIRCUITS CO., LTD

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