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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Diodes Incorporated DMP31D7LTQ-7

Name: DMP31D7LTQ-7
Brand: Diodes Incorporated
SKU: DMP31D7LTQ-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DMP31D7LTQ-7

Manufacturer:: Diodes Incorporated

Category:: FETs, MOSFETs

Package:: SOT-523

Datasheet:: DMP31D7LTQ-7.pdf

Description:: MOSFET BVDSS: 25V~30V SOT523 T&R

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Product details

Overview

DMP31D7LTQ-7 from Diodes Incorporated is a P-channel enhancement-mode MOSFET in SOT523 package, rated for -30V V_DSS, 0.9Ω R_DS(ON) @ V_GS = -10V, and -0.5A continuous drain current at +25°C. It delivers low gate threshold (-1 to -2.6V), fast switching (t_D(ON) = 30ns), and AEC-Q101 qualification for automotive load-switching applications.

For engineers reviewing the DMP31D7LTQ-7 datasheet, DMP31D7LTQ-7 pinout, DMP31D7LTQ-7 application, or DMP31D7LTQ-7 equivalent, this page provides verified electrical parameters, thermal performance data, SOT523 terminal mapping, and validated automotive-grade alternatives - all grounded in Diodes' DS45535 Rev. 2-2 specification.

Technical Context

This MOSFET operates as a high-side load switch with gate-controlled conduction in P-channel topology. Its -1.0V typical V_GS(TH) enables direct interface with 3.3V logic, while low C_iss (19pF) and Q_g (0.36nC) support efficient 1MHz-class switching in DC-DC converters.

Thermal design is constrained by R_θJA = 488°C/W on FR-4 (2oz Cu, minimal pad) and 377°C/W with 1-inch² copper pour. The device sustains operation from -55°C to +150°C junction temperature, with normalized R_DS(ON) variation ≤1.8× across that range at V_GS = -4.5V.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	-30V - Maximum blocking voltage before avalanche conduction; sets upper limit for input rail in 24V automotive systems.
R_DS(ON)	0.9Ω @ V_GS = -10V - Power loss of 360mW at -0.6A; enables <100mW dissipation in 3.3V logic-driven load switches.
I_D (T_A = +25°C)	-0.5A - Continuous current rating under standard board conditions; derates to -0.28A at +70°C ambient.
Q_g	0.36nC - Total gate charge required for full turn-on; determines drive strength needed from microcontroller GPIO.
C_iss	19pF - Input capacitance at V_DS = -15V; impacts switching speed and EMI when driven by low-impedance sources.
V_GS(TH)	-1.0 to -2.6V - Gate threshold range enabling reliable turn-on with 3.3V logic; avoids partial-conduction losses in battery-powered systems.
P_D (min pad)	0.26W - Max steady-state power on FR-4 with minimum recommended copper; defines thermal headroom without heatsinking.

Pinout & Package

Package: SOT523 - ultra-small surface-mount plastic package (1.60 × 1.60 × 0.75 mm), RoHS-compliant, halogen-free, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
1 (Source)	Current return path for P-channel conduction	Connected to higher potential rail (e.g., battery+); must be routed with low-inductance trace in high-dI/dt load switching.
2 (Gate)	Control electrode for channel formation	Requires <1µA leakage drive; sensitive to ESD (integrated protection); referenced to source, not ground.
3 (Drain)	Current output terminal	Connected to load; reverse-biased body diode conducts during inductive flyback unless clamped externally.

Key Features

Feature	Design Value
Low R_DS(ON) at low V_GS	1.7Ω @ V_GS = -4.5V - Enables use with 5V or 3.3V microcontrollers without level-shifting circuitry.
ESD-protected gate	HBM >2kV - Eliminates need for external gate protection in assembly and field handling.
AEC-Q101 qualified	Automotive-grade reliability - Validated for temperature cycling, HTRB, and UHAST per AEC stress test plan.
Fast switching	t_F = 31ns - Reduces transition losses in PWM-controlled power rails operating above 100kHz.
Green packaging	Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb) - Meets EU ELV and China RoHS requirements.

Applications

Automotive Body Control Module

USB-C Port Power Switch

Use Scenario: Controlling 12V accessory loads (e.g., interior lighting, mirror heaters) via MCU GPIO in BCMs.

IC Role / Device Role / Timing Role: High-side load switch managing power delivery with controlled inrush and fault isolation.

Use Value: -0.36A rating at V_GS = -4.5V ensures compatibility with 3.3V automotive MCUs; AEC-Q101 qualification guarantees 15-year field life.

Use Scenario: Enabling/disabling VBUS power to USB-C receptacles in portable docking stations.

IC Role / Device Role / Timing Role: Bidirectional load switch with integrated body diode for reverse-current blocking during hot-plug events.

Use Value: Low 0.9Ω R_DS(ON) limits voltage drop to <500mV at 500mA; fast t_D(OFF) = 28ns prevents bus glitches during dynamic reconfiguration.

Industrial Sensor Node Power Gating

Medical Wearable Battery Management

Use Scenario: Power-gating analog front-end circuits (e.g., ADC bias, op-amp rails) between measurement cycles in battery-operated sensors.

IC Role / Device Role / Timing Role: Ultra-low-leakage (I_DSS ≤ -1µA) P-channel switch minimizing standby current.

Use Value: -1µA I_DSS at -24V extends 10-year battery life in LoRaWAN nodes; SOT523 footprint saves PCB area in compact sensor modules.

Use Scenario: Isolating rechargeable Li-ion battery from patient-monitoring subsystems during sleep mode.

IC Role / Device Role / Timing Role: Low-threshold (-1V typ) switch activated directly by ARM Cortex-M0+ GPIO without auxiliary drivers.

Use Value: V_GS(TH) ≤ -2.6V ensures guaranteed turn-on margin over full battery voltage range (4.2V → 2.8V); RoHS/Green compliance meets IEC 60601-1 safety standards.

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	N-channel, 30V, 0.045Ω @ V_GS = 10V, SO-8 package	Requires high-side driver or bootstrap circuit; unsuitable for direct GPIO control	Select only if system already uses N-channel gate drivers and needs lower R_DS(ON).
AO3401	P-channel, 30V, 0.085Ω @ V_GS = -10V, SOT23 package, non-AEC-Q101	Larger footprint (SOT23 vs SOT523); lacks automotive qualification and tighter V_GS(TH) distribution	Acceptable for cost-sensitive industrial designs where AEC-Q101 is not mandated.

Compared with DMN3026LSD-13 and AO3401, DMP31D7LTQ-7 uniquely combines AEC-Q101 qualification, SOT523 miniaturization, and -1V typical V_GS(TH) - making it the only option for space-constrained, 3.3V-driven automotive load switching without external level shifters.

Availability

DMP31D7LTQ-7 is available at Aetrix Electronics and suitable for automotive body control modules, USB-C power delivery systems, industrial sensor nodes, and medical wearable battery management requiring stable component supply and long-term lifecycle assurance.

Supply support for DMP31D7LTQ-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 centers across Asia and manufacturing in IATF 16949-certified facilities.

This device belongs to Diodes' Automotive-Grade Power MOSFET product line, engineered specifically for reliable high-side switching in 12V/24V vehicle subsystems under extended temperature and vibration stress.

FAQ

What is the maximum safe operating voltage for DMP31D7LTQ-7?

The absolute maximum drain-source voltage (V_DSS) is -30V. Operation beyond this rating risks avalanche breakdown and irreversible damage. In practice, design margins require limiting V_DS to ≤ -24V for sustained reliability, especially in automotive transients per ISO 7637-2 Pulse 5a.

Can DMP31D7LTQ-7 be driven directly by a 3.3V microcontroller GPIO?

Yes - its V_GS(TH) range of -1.0V to -2.6V ensures full enhancement at V_GS = -3.3V. With R_DS(ON) = 1.7Ω @ V_GS = -4.5V and 0.9Ω @ -10V, it delivers usable conduction even with 3.3V logic, though R_DS(ON) increases ~90% versus -10V drive.

Does DMP31D7LTQ-7 include integrated ESD protection?

Yes - the datasheet explicitly states "ESD Protected Gate" and specifies ±2kV HBM rating. This eliminates the need for external TVS diodes on the gate line in most board-level ESD environments (IEC 61000-4-2 Level 3).

What is the thermal resistance when mounted on a 1-inch² copper pour?

When mounted on an FR-4 board with a 1-inch² copper plate (2oz Cu), R_θJA is 377°C/W. This allows 0.33W steady-state power dissipation before reaching the 150°C max junction temperature at +25°C ambient - critical for thermally constrained automotive modules.

DMP31D7LTQ-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SOT-523

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:: 360mA (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):: 260mW (Ta)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-523

DMP31D7LTQ-7 FAQ

1.How can I place an order for DMP31D7LTQ-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for DMP31D7LTQ-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 DMP31D7LTQ-7 reliable?

The price and inventory of DMP31D7LTQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMP31D7LTQ-7 is usually 5 days.

3.What payment methods are accepted for DMP31D7LTQ-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMP31D7LTQ-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DMP31D7LTQ-7?

DMP31D7LTQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DMP31D7LTQ-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 DMP31D7LTQ-7?

For technical support, including DMP31D7LTQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMP31D7LTQ-7 requirements.

6.How does Aetrix verify that DMP31D7LTQ-7 is sourced from the original manufacturer or authorized distributors?

All DMP31D7LTQ-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 DMP31D7LTQ-7 meets industry standards.

7.What is the process for return or replacement of DMP31D7LTQ-7?

All DMP31D7LTQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DMP31D7LTQ-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 DMP31D7LTQ-7 part is unused and in its original packaging.

Return procedure for DMP31D7LTQ-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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