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Diodes Incorporated DMP31D7LWQ-7
- Part No.:
- DMP31D7LWQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- FETs, MOSFETs
- Package:
- SC-70, SOT-323
- Datasheet:
-
DMP31D7LWQ-7.pdf
- Description:
- MOSFET BVDSS: 25V~30V SOT323 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:5,692
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Product details
Overview
DMP31D7LWQ-7 from Diodes Incorporated is a P-channel enhancement-mode MOSFET qualified to AEC-Q101 for automotive use, with -30V VDSS, 0.9Ω RDS(ON) @ VGS = -10V, -0.52A ID (TA = +25°C), and SOT323 package - deployed in DC-DC converters and load switches requiring low-threshold switching and PPAP support.
For engineers reviewing the DMP31D7LWQ-7 datasheet, DMP31D7LWQ-7 pinout, DMP31D7LWQ-7 application, or DMP31D7LWQ-7 equivalent, key selection criteria include gate threshold voltage (-2.0V typ), junction-to-ambient thermal resistance (334°C/W at recommended layout), body diode forward voltage (-0.8V typ), and AEC-Q101 qualification status for automotive power management.
Technical Context
This MOSFET operates as a low-side switch in automotive power rails, leveraging its -2.0V typical gate threshold to enable robust turn-on from 3.3V or 5V logic-level controllers. Its low input capacitance (19pF Ciss) and fast switching (tR = 74ns) reduce drive losses in high-frequency DC-DC stages.
The device integrates ESD protection on the gate and exhibits low leakage (<±10μA IGSS, <-1μA IDSS), supporting stable operation across -55°C to +150°C ambient. Its RDS(ON) remains stable over temperature - 0.9Ω at 25°C and <1.8Ω at 150°C under VGS = -10V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | -30V - supports 24V automotive systems with 20% derating margin against transients |
| RDS(ON) | 0.9Ω @ VGS = -10V - enables <180mW conduction loss at 0.42A continuous drain current |
| ID (max) | -0.52A @ TA = +25°C - rated for compact space-constrained load switch applications |
| VGS(TH) | -2.0V (typ) - ensures reliable turn-on with standard 3.3V microcontroller GPIOs |
| Ciss | 19pF - minimizes gate drive energy and propagation delay in 500kHz–1MHz switching |
| PD | 0.37W (FR-4, 2oz Cu, 1″² pad) - defines maximum steady-state power handling without heatsink |
| TJ range | -55°C to +150°C - meets extended temperature requirements for engine bay and ADAS modules |
Pinout & Package
Package: SOT323 - surface-mount plastic package with matte tin annealed terminals, moisture sensitivity level 1, UL 94V-0 rated molding compound, 0.006g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Source) | Current return path for P-channel channel | Connected to higher potential rail; serves as reference for gate control and body diode cathode |
| 2 (Gate) | Control electrode for channel conduction | ESD-protected input requiring <0.36nC total charge for full turn-on at -4.5V |
| 3 (Drain) | Main current-carrying terminal | Connected to load; body diode anode - conducts reverse current during inductive flyback |
Key Features
| Feature | Design Value |
|---|---|
| Low gate threshold voltage | VGS(TH) = -2.0V (typ) - enables direct drive from 3.3V/5V logic without level-shifting circuitry |
| Low input capacitance | Ciss = 19pF - reduces gate driver power consumption and improves switching efficiency above 500kHz |
| Fast switching speed | tR = 74ns, tF = 31ns - limits overlap conduction loss in synchronous buck topologies |
| ESD-protected gate | HBM >2kV - eliminates need for external gate protection in production automotive PCBs |
| AEC-Q101 qualification | PPAP-capable, IATF16949-manufactured - satisfies OEM requirements for change control and traceability |
Applications
| Automotive DC-DC Converters | Engine Control Unit Power Switching |
|---|---|
|
Use Scenario: Step-down conversion from 12V battery to 3.3V/5V for MCU and sensor rails in ADAS domain controllers. IC Role / Device Role / Timing Role: Low-side synchronous rectifier in buck converter output stage, operating at 1–2MHz switching frequency. Use Value: 0.9Ω RDS(ON) limits conduction loss to <200mW at 0.42A, enabling thermally constrained layouts without forced air cooling. |
Use Scenario: Controlled power gating of fuel injector drivers and camshaft position sensors in ICE powertrain modules. IC Role / Device Role / Timing Role: High-reliability load switch activated by 3.3V CAN microcontroller GPIO with <100ms response time. Use Value: -2.0V VGS(TH) ensures full enhancement at 3.3V logic, eliminating risk of partial turn-on and thermal runaway during cold cranking. |
| Infotainment System Load Management | Body Control Module Power Distribution |
|
Use Scenario: Sequenced power-up of display backlight, audio amplifier, and USB-C PD controller in head unit subsystems. IC Role / Device Role / Timing Role: Soft-start enabled load switch with controlled slew rate via gate resistor, preventing inrush current spikes. Use Value: Low Ciss (19pF) and fast tR/tF allow precise timing control of power sequencing within ±50ns tolerance. |
Use Scenario: Distributed 12V power routing to door lock actuators, mirror heaters, and interior lighting in BCM subassemblies. IC Role / Device Role / Timing Role: Fault-tolerant high-side switch replacement using P-channel configuration with integrated body diode. Use Value: -0.8V VSD body diode forward voltage enables bidirectional current handling during load dump events without external freewheeling diode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar P-channel automotive MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMG3415L-7 | RDS(ON) = 0.55Ω @ -4.5V, higher ID = -4A, larger SOT23 package | Better suited for higher-current loads (>1A); requires larger PCB footprint and thermal relief | Select when system current exceeds 0.5A and board space allows SOT23 |
| AO3415 | VGS(TH) = -1.5V (min), RDS(ON) = 0.55Ω @ -4.5V, non-AEC-Q101 qualified | Lacks PPAP documentation and automotive reliability validation; limited to non-safety-critical consumer-grade designs | Choose only for cost-sensitive non-automotive prototypes where AEC compliance is not required |
Compared with DMG3415L-7 and AO3415, DMP31D7LWQ-7 trades higher RDS(ON) for smaller SOT323 footprint and guaranteed AEC-Q101 qualification - making it optimal for space-constrained, production-ready automotive modules requiring full traceability.
Availability
DMP31D7LWQ-7 is available at Aetrix Electronics and suitable for automotive DC-DC converters, engine control unit power switching, and body control module power distribution requiring stable component supply, full PPAP documentation, and AEC-Q101-compliant sourcing.
Supply support for DMP31D7LWQ-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions, with design and manufacturing facilities certified to IATF16949 for automotive-grade components.
DMP31D7LWQ-7 belongs to Diodes' AEC-Q101-qualified power MOSFET product line, engineered specifically for automotive power management functions including load switching, DC-DC conversion, and ECU power gating.
FAQ
What is the maximum continuous drain current for DMP31D7LWQ-7 at 70°C ambient?
The maximum continuous drain current is -0.3A at TA = +70°C, as specified in the Absolute Maximum Ratings table. This derating reflects thermal limitations of the SOT323 package on standard FR-4 PCB with 2oz copper and minimum pad layout, ensuring safe operation below junction temperature limits.
Does DMP31D7LWQ-7 require a gate resistor for stability in switching applications?
A gate resistor is recommended to dampen ringing caused by gate-drain capacitance and PCB trace inductance. The datasheet specifies Rg = 10Ω in dynamic test conditions; typical values range from 10Ω to 47Ω depending on switching frequency and drive strength, balancing speed versus EMI and overshoot.
Can DMP31D7LWQ-7 be used in high-side switch configurations?
No - DMP31D7LWQ-7 is optimized as a low-side switch due to its P-channel topology and source-terminal connection to the higher-potential rail. For high-side switching, a dedicated high-side driver IC or N-channel MOSFET with bootstrap circuitry is required; this part's pinout and thermal design assume source-grounded or source-rail-referenced layout.
Is the body diode in DMP31D7LWQ-7 suitable for freewheeling in inductive loads?
Yes - the intrinsic body diode has VSD = -0.8V (typ) at -0.23A and supports reverse recovery times compatible with 1–2MHz DC-DC operation. It is rated for continuous body diode forward current of -0.42A, making it suitable for flyback paths in automotive solenoid and relay drivers without external diode addition.
DMP31D7LWQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- FET Type:
- P-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 30 V
- Current - Continuous Drain (Id) @ 25°C:
- 380mA (Ta)
- Drive Voltage (Max Rds On, Min Rds On):
- 4.5V, 10V
- Rds On (Max) @ Id, Vgs:
- 900mOhm @ 420mA, 10V
- Vgs(th) (Max) @ Id:
- 2.6V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 0.36 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 19 pF @ 15 V
- FET Feature:
- -
- Power Dissipation (Max):
- 290mW
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
DMP31D7LWQ-7 FAQ
1.How can I place an order for DMP31D7LWQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DMP31D7LWQ-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DMP31D7LWQ-7 reliable?
The price and inventory of DMP31D7LWQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMP31D7LWQ-7 is usually 5 days.
3.What payment methods are accepted for DMP31D7LWQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMP31D7LWQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DMP31D7LWQ-7?
DMP31D7LWQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DMP31D7LWQ-7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DMP31D7LWQ-7?
For technical support, including DMP31D7LWQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMP31D7LWQ-7 requirements.
6.How does Aetrix verify that DMP31D7LWQ-7 is sourced from the original manufacturer or authorized distributors?
All DMP31D7LWQ-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DMP31D7LWQ-7 meets industry standards.
7.What is the process for return or replacement of DMP31D7LWQ-7?
All DMP31D7LWQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DMP31D7LWQ-7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DMP31D7LWQ-7 part is unused and in its original packaging.
Return procedure for DMP31D7LWQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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