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Diodes Incorporated DMP31D1UW-7
- Part No.:
- DMP31D1UW-7
- Manufacturer:
- Diodes Incorporated
- Category:
- FETs, MOSFETs
- Package:
- SC-70, SOT-323
- Datasheet:
-
DMP31D1UW-7.pdf
- Description:
- MOSFET BVDSS: 8V~24V SOT323 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:6,941
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Product details
Overview
DMP31D1UW-7 from Diodes Incorporated is a P-channel enhancement-mode MOSFET in SOT323 package, rated for -30V VDSS, 1Ω RDS(ON) @ VGS = -4.5V, and -0.6A continuous drain current at +25°C. It serves as a low-power load switch or DC-DC converter synchronous rectifier in space-constrained portable electronics.
For engineers reviewing the DMP31D1UW-7 datasheet, DMP31D1UW-7 pinout, DMP31D1UW-7 application, or DMP31D1UW-7 equivalent, key selection criteria include gate threshold voltage (-0.5 to -1.1V), low input capacitance (54pF Ciss), fast switching (3.8ns tD(ON)), thermal resistance (220°C/W with copper pad), and RoHS-compliant green packaging.
Technical Context
This MOSFET employs planar trench-gate technology optimized for low RDS(ON) while maintaining sub-1V gate threshold and minimal gate charge (1.0nC @ VGS = -4.5V). Its body diode exhibits -0.8V forward voltage at -300mA, enabling efficient reverse-current conduction in buck converters.
The device operates across -55°C to +150°C junction temperature range and supports pulsed drain currents up to -1.9A. Thermal performance is validated on FR-4 PCB with 1-inch² copper plate (RθJA = 220°C/W) and features ESD-protected gate (HBM > 2kV).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | -30V - maximum blocking voltage for low-voltage power rails |
| RDS(ON) | 1Ω @ VGS = -4.5V - enables <100mW conduction loss at 0.4A load |
| VGS(TH) | -0.5 to -1.1V - ensures turn-on with standard 3.3V/5V logic-level drive |
| Ciss | 54pF - reduces gate drive power and speeds switching transitions |
| tD(ON) | 3.8ns - supports high-frequency operation (>1MHz) in compact DC-DC designs |
| PD | 0.57W - delivers usable power handling with minimal heatsinking on standard PCB |
| TJ Range | -55°C to +150°C - qualified for industrial and extended-temperature embedded systems |
Pinout & Package
Package: SOT323 - ultra-small surface-mount plastic package (2.15mm × 2.10mm × 0.95mm), lead-free, halogen-free, and RoHS-compliant with matte tin finish on Alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G (Gate) | Control terminal | Accepts negative VGS to modulate channel; threshold centered at -0.8V |
| D (Drain) | Current sink node | Connected to higher-potential rail; handles -30V blocking and -1.9A pulsed current |
| S (Source) | Reference/return node | Biased at system ground or positive rail; forms body diode anode for reverse conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low gate threshold voltage | Enables full enhancement with 3.3V microcontroller GPIO without level-shifting circuitry |
| Low input capacitance (Ciss) | Reduces gate drive energy consumption and improves efficiency in battery-powered devices |
| Fast switching speed | Minimizes transition losses in high-frequency DC-DC converters operating above 500kHz |
| ESD-protected gate | Withstands >2kV HBM, reducing risk of assembly-line damage during SMT reflow and handling |
| Green molding compound | UL 94V-0 rated, halogen-free (<900ppm Br+Cl), and antimony-free for eco-conscious compliance |
Applications
| USB Power Delivery Switch | Portable Medical Sensor Node |
|---|---|
|
Use Scenario: Enables/disables 5V VBUS path in USB-C accessories with strict size constraints. IC Role / Device Role: Low-side load switch controlling power delivery to downstream peripherals. Use Value: 1Ω RDS(ON) limits voltage drop to <0.4V at 400mA, preserving bus regulation margin. |
Use Scenario: Powers intermittent BLE transceiver and analog front-end in wearable health monitors. IC Role / Device Role: High-efficiency power gating element in ultra-low-quiescent current sleep/wake sequencing. Use Value: Sub-1μA IDSS leakage preserves battery life over multi-week standby periods. |
| Industrial IoT Edge Controller | Automotive Cabin Lighting Module |
|
Use Scenario: Isolates auxiliary 3.3V rail in DIN-rail mounted PLC modules exposed to wide ambient temperatures. IC Role / Device Role: Protected power switch managing sensor interface supply under transient conditions. Use Value: -55°C to +150°C rating ensures reliable operation without derating in unventilated enclosures. |
Use Scenario: Controls LED backlight dimming in automotive infotainment displays using PWM-driven source-follower configuration. IC Role / Device Role: Low-noise, low-RDS(ON) source switch minimizing thermal drift in brightness control. Use Value: 0.8V gate threshold allows direct drive from 3.3V MCU PWM outputs without external biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar P-channel load switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMG3415L-7 | RDS(ON) = 0.55Ω @ VGS = -4.5V; SOT-23 package; higher IDMAX = -4A | Higher current capacity suits larger loads but requires larger board area and higher gate charge (2.5nC) | Select when >0.6A continuous current or lower conduction loss is required; verify layout compatibility with SOT-23 footprint |
| AO3415 | RDS(ON) = 0.055Ω @ VGS = -4.5V; SO-8 package; VDSS = -20V | Lower voltage rating restricts use to ≤20V systems; significantly lower RDS(ON) demands stronger gate drive | Prefer for 12V automotive subsystems where ultra-low loss dominates over footprint; avoid in 24V or 30V rails |
Compared with DMG3415L-7 and AO3415, DMP31D1UW-7 offers optimal balance of ultra-compact SOT323 size, moderate RDS(ON), and robust -30V rating-making it ideal for space-limited, 3.3V/5V logic-driven load switching where thermal headroom is constrained.
Availability
DMP31D1UW-7 is available at Aetrix Electronics and suitable for USB power delivery switches, portable medical sensor nodes, and industrial IoT edge controllers requiring stable component supply and long-term lifecycle support.
Supply support for DMP31D1UW-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 manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
DMP31D1UW-7 belongs to Diodes' high-efficiency power MOSFET product line, engineered specifically for low-voltage, low-power load switching and DC-DC converter applications in portable and space-constrained electronics.
FAQ
What is the maximum safe operating voltage for DMP31D1UW-7?
The absolute maximum drain-source voltage (VDSS) is -30V. Operation beyond this rating risks irreversible avalanche breakdown. For reliable long-term use, design margins should limit steady-state VDS to ≤24V, especially under transient conditions or elevated temperature.
Can DMP31D1UW-7 be driven directly by a 3.3V microcontroller GPIO?
Yes. With a gate threshold voltage range of -0.5V to -1.1V, the device fully enhances at VGS = -3.3V, delivering RDS(ON) ≈ 1.3Ω. This yields <0.5V drop at 400mA, making it suitable for direct logic-level drive without external level shifters.
Is DMP31D1UW-7 suitable for automotive applications?
While not AEC-Q101 qualified, its -55°C to +150°C operating range, ESD-protected gate, and green RoHS-compliant construction support non-safety-critical automotive cabin applications (e.g., lighting, infotainment peripherals). For qualified parts, contact Diodes' automotive team for PPAP-capable alternatives.
How does thermal performance change with PCB layout?
Thermal resistance drops from 287°C/W (standard FR-4, minimum pad) to 220°C/W with a 1-inch² copper pour. To maintain TJ < 125°C at 0.5A, use ≥100mm² copper area per side under the SOT323 pad and minimize trace length to reduce parasitic inductance.
DMP31D1UW-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:
- 600mA (Ta)
- Drive Voltage (Max Rds On, Min Rds On):
- 1.8V, 4.5V
- Rds On (Max) @ Id, Vgs:
- 1Ohm @ 400mA, 4.5V
- Vgs(th) (Max) @ Id:
- 1.1V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 1.6 nC @ 8 V
- Vgs (Max):
- ±8V
- Input Capacitance (Ciss) (Max) @ Vds:
- 54 pF @ 15 V
- FET Feature:
- -
- Power Dissipation (Max):
- 440mW
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
DMP31D1UW-7 FAQ
1.How can I place an order for DMP31D1UW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DMP31D1UW-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 DMP31D1UW-7 reliable?
The price and inventory of DMP31D1UW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMP31D1UW-7 is usually 5 days.
3.What payment methods are accepted for DMP31D1UW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMP31D1UW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DMP31D1UW-7?
DMP31D1UW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DMP31D1UW-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 DMP31D1UW-7?
For technical support, including DMP31D1UW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMP31D1UW-7 requirements.
6.How does Aetrix verify that DMP31D1UW-7 is sourced from the original manufacturer or authorized distributors?
All DMP31D1UW-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 DMP31D1UW-7 meets industry standards.
7.What is the process for return or replacement of DMP31D1UW-7?
All DMP31D1UW-7 units undergo pre-shipment inspection (PSI). If there is an issue with DMP31D1UW-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 DMP31D1UW-7 part is unused and in its original packaging.
Return procedure for DMP31D1UW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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