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Diodes Incorporated DMP31D7LFB-7B
- Part No.:
- DMP31D7LFB-7B
- Manufacturer:
- Diodes Incorporated
- Category:
- FETs, MOSFETs
- Package:
- 3-UFDFN
- Datasheet:
-
DMP31D7LFB-7B.pdf
- Description:
- MOSFET BVDSS: 25V~30V X1-DFN1006
- Quantity:
- Payment:
- Shipping:
Inventory:4,461
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Product details
Overview
DMP31D7LFB-7B from Diodes Incorporated is a P-channel enhancement-mode MOSFET designed for low-voltage load switching in space-constrained applications. It features -30V VDSS, 0.9Ω RDS(ON) @ VGS = -10V, -0.81A continuous drain current at +25°C, and a compact X1-DFN1006-3 (1.0 × 0.6 mm) package - enabling high-density power routing in portable battery management and USB-C port protection circuits.
For engineers reviewing the DMP31D7LFB-7B datasheet, DMP31D7LFB-7B pinout, DMP31D7LFB-7B application, or DMP31D7LFB-7B equivalent, key selection criteria include gate threshold voltage (-1 to -2.6V), thermal resistance (141°C/W with 25mm² copper), ESD-protected gate, fast switching (tF = 31ns), and compliance with AEC-Q101 automotive qualification requirements.
Technical Context
This MOSFET operates as a single-polarity, surface-mount load switch with logic-level gate drive compatibility down to -4.5V. Its low RDS(ON) (1.7Ω @ VGS = -4.5V) enables efficient power path control in 3.3V/5V systems while maintaining robust safe operating area (SOA) up to 150°C junction temperature.
The device integrates an intrinsic body diode with VSD = -0.8 to -1.2V at -0.23A, supporting reverse-current blocking and bidirectional transient protection. Its 19pF Ciss, 3pF Crss, and 0.36nC total gate charge ensure minimal drive power and rapid turn-on/turn-off transitions in high-frequency switching topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | -30V - Maximum drain-source blocking voltage before avalanche conduction |
| RDS(ON) | 0.9Ω @ VGS = -10V - Enables <100mW conduction loss at 330mA load current |
| ID (continuous) | -0.81A @ TA = +25°C - Supports typical USB port or sensor rail switching loads |
| VGS(TH) | -1 to -2.6V - Ensures reliable turn-on with standard 3.3V GPIO or I²C-level drivers |
| Qg | 0.36nC - Reduces gate drive energy and minimizes switching transition time |
| RθJA | 141°C/W - Achievable with 25mm² copper pour; critical for thermal margin in sealed enclosures |
| Ciss | 19pF - Limits capacitive loading on driving signal lines in high-speed control paths |
Pinout & Package
Package: X1-DFN1006-3 - ultra-compact 1.0 mm × 0.6 mm, 0.47–0.53 mm height, 3-terminal leadless plastic package with NiPdAu-plated terminals and UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Drain (D) | Main current-carrying terminal (connected to source of upstream PMOS or supply rail) | Exposed pad on bottom serves as primary thermal path; requires soldered thermal pad for rated power dissipation |
| Source (S) | Reference node for gate drive and current return path | Internally tied to package substrate; must be connected to system ground or common return for stable VGS biasing |
| Gate (G) | Control input for channel modulation | ESD-protected (±10μA leakage); sensitive to overvoltage - must not exceed ±20V per absolute maximum rating |
Key Features
| Feature | Design Value |
|---|---|
| 0.6 mm² footprint | 13× smaller than SOT-23 - enables placement in tight spaces such as USB-C connector modules and wearable PCBs |
| Low VGS(TH) | -1 to -2.6V range ensures full enhancement with 3.3V microcontroller outputs without level-shifting circuitry |
| Fast switching | tF = 31ns and tR = 74ns - reduces transition losses in PWM-controlled power rails and improves efficiency above 100kHz |
| ESD-protected gate | HBM rating ≥2kV - eliminates need for external gate protection diodes in consumer-grade assembly environments |
| AEC-Q101 qualified | Validated for automotive load-switch applications including infotainment USB ports and ADAS camera power sequencing |
Applications
| USB-C Port Power Switching | Smartphone Battery Protection |
|---|---|
Use Scenario: Controlling VBUS power delivery to downstream peripherals in dual-role USB-C ports. IC Role / Device Role / Timing Role: P-channel load switch managing hot-swap insertion and overcurrent isolation. Use Value: Low RDS(ON) limits voltage drop across switch during 5V/3A operation, preserving bus regulation within ±5% tolerance. | Use Scenario: Isolating main Li-ion battery from system during deep sleep or fault conditions. IC Role / Device Role / Timing Role: High-side disconnect switch activated by PMIC or baseband processor GPIO. Use Value: Gate threshold compatible with 1.8V/3.3V logic enables direct MCU control without external level shifters. |
| Automotive Infotainment USB Hub | IoT Sensor Node Power Gating |
Use Scenario: Enabling/disabling USB data/power to rear-seat entertainment modules in vehicles. IC Role / Device Role / Timing Role: AEC-Q101-compliant load switch integrated into power distribution IC (PDC) subsystem. Use Value: 150°C max junction temperature supports under-dash mounting without active cooling. | Use Scenario: Shutting down environmental sensors (e.g., humidity, CO₂) between measurement cycles to extend battery life. IC Role / Device Role / Timing Role: Ultra-low-quiescent-power load switch controlled by microcontroller wake-up timer. Use Value: 1μA max IDSS at -24V ensures <10nW standby leakage - critical for 10-year coin-cell operation. |
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 |
|---|---|---|---|
| DMN3026LSD-13 | Higher RDS(ON) (1.4Ω @ -4.5V), larger SOT-23 package, no AEC-Q101 qualification | Limited to commercial-grade portable electronics; unsuitable for automotive environments | Select when cost sensitivity outweighs size and qualification requirements |
| Si2301DDS-T1-BE3 | Lower VDSS (-20V), higher Qg (1.4nC), same DFN1006 package but non-AEC-Q101 | Not rated for automotive temperature cycling; lower breakdown margin in 24V systems | Choose only for 3.3V-only applications where gate charge is less critical than cost |
Compared with DMN3026LSD-13 and Si2301DDS-T1-BE3, DMP31D7LFB-7B delivers superior thermal performance (141°C/W vs. >200°C/W), tighter VGS(TH) distribution, and automotive qualification - making it the preferred choice for space-constrained, thermally demanding, or safety-critical load switching.
Availability
DMP31D7LFB-7B is available at Aetrix Electronics and suitable for USB-C power delivery, smartphone battery protection, and automotive infotainment USB hub applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for DMP31D7LFB-7B 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, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, automotive, and consumer markets.
The DMP31D7LFB-7B belongs to Diodes' logic-level P-channel MOSFET product line, engineered specifically for compact, low-voltage load switching in battery-powered and automotive electronics where thermal efficiency and qualification compliance are mandatory.
FAQ
What is the maximum allowable gate-source voltage for DMP31D7LFB-7B?
The absolute maximum VGS is ±20V. Exceeding this rating risks permanent gate oxide damage. In practice, gate drive should be limited to -10V for full enhancement and -4.5V for logic-level compatibility. The device's ESD-protected gate withstands ±2kV HBM, but sustained overvoltage remains destructive.
Can DMP31D7LFB-7B be used in automotive applications?
Yes - DMP31D7LFB-7B is AEC-Q101 qualified and manufactured in IATF 16949 certified facilities. It supports operating temperatures from -55°C to +150°C and meets automotive PPAP requirements. Diodes provides change control documentation for automotive customers upon request.
How does the X1-DFN1006-3 package affect thermal performance?
The X1-DFN1006-3 package achieves RθJA = 141°C/W only when mounted on a 25mm² copper pour (2 oz). With minimal pad layout (FR-4, 2 oz), RθJA degrades to 236°C/W. The exposed drain pad must be fully soldered to maximize heat transfer; incomplete thermal pad connection causes >30% thermal resistance increase.
Is there a recommended gate resistor value for switching applications?
A 10Ω series gate resistor is validated in the datasheet for 4.5V drive (tF = 31ns, tR = 74ns). Lower values (<5Ω) risk ringing due to 729Ω gate resistance and 19pF Ciss; higher values (>47Ω) increase switching losses. For PWM frequencies >500kHz, add a 100pF capacitor from gate to source to dampen oscillation.
DMP31D7LFB-7B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-UFDFN
- 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:
- 810mA (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 @ 4.5 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 19 pF @ 15 V
- FET Feature:
- -
- Power Dissipation (Max):
- 530mW (Ta)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X1-DFN1006-3
DMP31D7LFB-7B FAQ
1.How can I place an order for DMP31D7LFB-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for DMP31D7LFB-7B 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 DMP31D7LFB-7B reliable?
The price and inventory of DMP31D7LFB-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMP31D7LFB-7B is usually 5 days.
3.What payment methods are accepted for DMP31D7LFB-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMP31D7LFB-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DMP31D7LFB-7B?
DMP31D7LFB-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DMP31D7LFB-7B 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 DMP31D7LFB-7B?
For technical support, including DMP31D7LFB-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMP31D7LFB-7B requirements.
6.How does Aetrix verify that DMP31D7LFB-7B is sourced from the original manufacturer or authorized distributors?
All DMP31D7LFB-7B 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 DMP31D7LFB-7B meets industry standards.
7.What is the process for return or replacement of DMP31D7LFB-7B?
All DMP31D7LFB-7B units undergo pre-shipment inspection (PSI). If there is an issue with DMP31D7LFB-7B, 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 DMP31D7LFB-7B part is unused and in its original packaging.
Return procedure for DMP31D7LFB-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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