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Diodes Incorporated DMP31D7LFBQ-7B
- Part No.:
- DMP31D7LFBQ-7B
- Manufacturer:
- Diodes Incorporated
- Category:
- FETs, MOSFETs
- Package:
- 3-UFDFN
- Datasheet:
-
DMP31D7LFBQ-7B.pdf
- Description:
- MOSFET BVDSS: 25V~30V X1-DFN1006
- Quantity:
- Payment:
- Shipping:
Inventory:7,175
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Product details
Overview
DMP31D7LFBQ-7B from Diodes Incorporated is a P-channel enhancement-mode MOSFET designed for low-voltage load switching in space-constrained automotive and portable electronics. It delivers RDS(ON) = 0.9 Ω @ VGS = −10 V, −30 V VDSS, −0.81 A continuous drain current at +25°C, and AEC-Q101 qualification-enabling use in infotainment power rails and USB-C port protection circuits.
For engineers reviewing the DMP31D7LFBQ-7B datasheet, DMP31D7LFBQ-7B pinout, DMP31D7LFBQ-7B application, or DMP31D7LFBQ-7B equivalent, key selection criteria include gate threshold voltage (−1 to −2.6 V), thermal resistance (141 °C/W with 25 mm² copper), ESD-protected gate, and X1-DFN1006-3 footprint compatibility with high-density PCB layouts.
Technical Context
This MOSFET operates as a single-polarity, surface-mount load switch with source-connected substrate and integrated gate ESD protection. Its low gate threshold enables direct control from 3.3 V or 5 V logic without level shifting, while its 0.6 mm² footprint supports miniaturized power domains in automotive body electronics.
The device uses a trench-gate process to achieve low RDS(ON) at low VGS (1.7 Ω @ −4.5 V), and exhibits fast switching (tD(ON) = 30 ns, tF = 31 ns) with controlled Qg = 0.36 nC-reducing dynamic losses in pulsed-load applications like LED backlight dimming and sensor biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | −30 V - Withstands reverse-biased drain-source transients up to automotive battery surge levels (ISO 7637-2 Pulse 1/2a). |
| RDS(ON) | 0.9 Ω @ VGS = −10 V - Enables ≤730 mW conduction loss at −0.81 A, suitable for 1 W-class load switching. |
| ID (continuous) | −0.81 A @ TA = +25°C - Supports typical microcontroller I/O-driven loads such as small solenoids or fan drivers. |
| Qg | 0.36 nC @ VGS = −4.5 V - Minimizes gate drive energy and allows efficient operation with low-power GPIOs. |
| RθJA | 141 °C/W - Achieved with 25 mm² copper pad; enables 0.89 W power dissipation in thermally enhanced layout. |
| VGS(TH) | −1 to −2.6 V - Ensures reliable turn-on from standard 3.3 V logic outputs without external biasing. |
| Ciss | 19 pF - Low input capacitance reduces Miller effect and improves noise immunity in high-frequency switching. |
Pinout & Package
Package: X1-DFN1006-3 (1.0 × 0.6 mm, 0.47–0.53 mm height), lead-free NiPdAu-plated terminals, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Source) | Source terminal (S) | Common reference node for gate control and load return path; internally connected to substrate. |
| Pin 2 (Drain) | Drain terminal (D) | High-side connection point for switched load; exposed pad provides thermal conduction to PCB. |
| Pin 3 (Gate) | Gate terminal (G) | Logic-level control input with ESD protection; requires no external gate resistor for ≤10 mA drive capability. |
Key Features
| Feature | Design Value |
|---|---|
| 0.6 mm² footprint | 13× smaller than SOT-23 - saves board area in multi-rail PMIC modules and compact ECUs. |
| AEC-Q101 qualified | Validated for automotive temperature range (−55°C to +150°C) and PPAP-capable manufacturing - meets Tier-1 supply chain requirements. |
| ESD-protected gate | HBM ≥2 kV - eliminates need for external gate protection diodes in handheld and dashboard-mounted systems. |
| Low VGS(TH) | −1 to −2.6 V - ensures full enhancement with 3.3 V MCU outputs, reducing BOM count and layout complexity. |
| Halogen- and antimony-free | <900 ppm Br/Cl, <1000 ppm Sb - satisfies EU ELV and OEM green material declarations for vehicle platforms. |
Applications
| Infotainment Power Rail Switching | USB-C Port Protection |
|---|---|
Use Scenario: Isolating audio codec or display driver ICs during system sleep to reduce quiescent current. IC Role / Device Role / Timing Role: High-side load switch controlling 3.3 V or 5 V rail enable timing synchronized to MCU wake-up interrupt. Use Value: Achieves <1 μA off-state leakage (IDSS) and <100 ns total switching time-meeting ISO 11898-3 standby compliance. |
Use Scenario: Preventing backfeed from USB-C VBUS into host controller when peripheral is disconnected. IC Role / Device Role / Timing Role: Reverse-current blocking element placed between VBUS and downstream DC-DC converter input. Use Value: Leverages intrinsic body diode forward voltage (VSD = −0.8 to −1.2 V) and low RDS(ON) to limit voltage drop to <900 mV at 500 mA. |
| Automotive Body Control Module (BCM) | Portable Medical Sensor Biasing |
Use Scenario: Enabling/disabling interior lighting LEDs or door lock actuators under LIN bus command. IC Role / Device Role / Timing Role: Low-side or high-side switch driven by 8-bit microcontroller GPIO with PWM dimming support. Use Value: Fast tF = 31 ns and low Qgd = 0.1 nC minimize switching transition losses during 1–10 kHz PWM cycles. |
Use Scenario: Sequencing power to analog front-end sensors (e.g., ECG electrodes) to avoid signal coupling during startup. IC Role / Device Role / Timing Role: Precision-controlled enable switch with soft-start behavior enabled via RC gate network. Use Value: Gate threshold consistency (±0.3 V over −40°C to +125°C) ensures repeatable turn-on timing across clinical operating environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar P-channel load switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMN3026LSD-13 | RDS(ON) = 1.2 Ω @ −4.5 V; larger SOT-23 package (2.9 × 1.3 mm); higher RθJA = 220 °C/W. | Less suited for ultra-dense layouts but offers higher ID = −1.2 A and wider VGS range (±25 V). | Select when higher current headroom and legacy SMT placement compatibility outweigh size constraints. |
| AO3401 | RDS(ON) = 0.085 Ω @ −4.5 V; SO-8 package; not AEC-Q101 qualified; RθJA = 110 °C/W on 1-in² copper. | Higher performance in non-automotive industrial or consumer applications where qualification is not required. | Choose for cost-sensitive, non-automotive designs needing lower conduction loss and higher thermal margin. |
Compared with DMN3026LSD-13 and AO3401, DMP31D7LFBQ-7B uniquely balances AEC-Q101 compliance, 0.6 mm² footprint, and −1 V gate threshold-making it optimal for next-generation automotive domain controllers where board space and functional safety coexist.
Availability
DMP31D7LFBQ-7B is available at Aetrix Electronics and suitable for automotive infotainment systems, USB-C power delivery subsystems, and body control modules requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for DMP31D7LFBQ-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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in IATF 16949-certified facilities.
The DMP31D7LFBQ belongs to Diodes' AEC-Q101-qualified power MOSFET product line, engineered specifically for automotive load switching, battery protection, and power management in harsh-environment electronic control units.
FAQ
Is DMP31D7LFBQ-7B suitable for high-side switching configurations?
Yes-it is optimized for high-side load switching due to its P-channel architecture and negative VGS(TH). When used with a grounded load, the source connects to the positive rail and the gate is pulled below the source voltage to turn on. Its −30 V VDSS rating supports 24 V automotive systems with transient margin.
What is the maximum allowable junction temperature during continuous operation?
The absolute maximum junction temperature is +150°C per the datasheet. Under continuous DC conditions with the recommended 25 mm² copper pad, the device reaches this limit at 0.89 W power dissipation-corresponding to approximately −0.96 A at RDS(ON) = 0.9 Ω. Derating is required above +70°C ambient.
Does the X1-DFN1006-3 package require special soldering profiles?
No special profile is needed beyond standard lead-free reflow. The package is rated for moisture sensitivity level 1 (unlimited floor life), and its NiPdAu finish ensures robust wetting with SAC305 paste. Recommended peak temperature is 260°C for ≤30 seconds, consistent with IPC-J-STD-020.
Can DMP31D7LFBQ-7B replace N-channel MOSFETs in existing designs?
No-it cannot directly replace N-channel devices due to opposite polarity and gate drive requirements. An N-channel high-side switch requires a charge pump or bootstrap circuit, whereas DMP31D7LFBQ-7B simplifies design with logic-level gate control. Replacement requires schematic and layout revision to accommodate P-channel topology and reversed current flow direction.
DMP31D7LFBQ-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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X1-DFN1006-3
DMP31D7LFBQ-7B FAQ
1.How can I place an order for DMP31D7LFBQ-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for DMP31D7LFBQ-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 DMP31D7LFBQ-7B reliable?
The price and inventory of DMP31D7LFBQ-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMP31D7LFBQ-7B is usually 5 days.
3.What payment methods are accepted for DMP31D7LFBQ-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMP31D7LFBQ-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DMP31D7LFBQ-7B?
DMP31D7LFBQ-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DMP31D7LFBQ-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 DMP31D7LFBQ-7B?
For technical support, including DMP31D7LFBQ-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMP31D7LFBQ-7B requirements.
6.How does Aetrix verify that DMP31D7LFBQ-7B is sourced from the original manufacturer or authorized distributors?
All DMP31D7LFBQ-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 DMP31D7LFBQ-7B meets industry standards.
7.What is the process for return or replacement of DMP31D7LFBQ-7B?
All DMP31D7LFBQ-7B units undergo pre-shipment inspection (PSI). If there is an issue with DMP31D7LFBQ-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 DMP31D7LFBQ-7B part is unused and in its original packaging.
Return procedure for DMP31D7LFBQ-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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