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Diodes Incorporated DMP31D7LTQ-13
- Part No.:
- DMP31D7LTQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- FETs, MOSFETs
- Package:
- SOT-523
- Datasheet:
-
DMP31D7LTQ-13.pdf
- Description:
- MOSFET BVDSS: 25V~30V SOT523 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:8,392
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Product details
Overview
DMP31D7LTQ-13 from Diodes Incorporated is a P-channel enhancement-mode MOSFET in SOT523 package, rated for -30V VDSS, 0.9Ω RDS(ON) @ VGS = -10V, and -0.5A continuous drain current at +25°C. It delivers low gate threshold voltage (-1 to -2.6V), fast switching (tD(ON) = 30ns), and AEC-Q101 qualification for automotive load-switching applications.
For engineers reviewing the DMP31D7LTQ-13 datasheet, DMP31D7LTQ-13 pinout, DMP31D7LTQ-13 application, or DMP31D7LTQ-13 equivalent, this page provides verified electrical parameters, thermal performance data, SOT523 terminal mapping, and validated automotive-grade alternatives - all confirmed against Diodes' DS45535 Rev. 2-2.
Technical Context
This MOSFET operates as a high-side load switch with gate-controlled conduction in negative-voltage rail systems. Its low RDS(ON) at -4.5V VGS (1.7Ω) enables efficient operation from 3.3V/5V logic-level control, while ESD-protected gate structure ensures robustness in automated assembly and field environments.
The device uses a planar trench process optimized for low input capacitance (Ciss = 19pF) and minimal reverse transfer capacitance (Crss = 3pF), supporting clean turn-on/turn-off transitions in space-constrained DC-DC converter feedback paths and battery-isolation circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | -30V - supports rail-to-rail operation in 24V automotive subsystems with margin against transients |
| RDS(ON) | 0.9Ω @ VGS = -10V - limits I²R loss to ≤180mW at 0.42A, enabling thermally stable operation on FR-4 |
| ID (TA = +25°C) | -0.5A - sufficient for USB-C power delivery enable paths and sensor bias switching |
| VGS(TH) | -1 to -2.6V - ensures full enhancement with standard 3.3V GPIO without level-shifting |
| Ciss | 19pF - reduces gate drive power and minimizes shoot-through risk in synchronous buck top switches |
| tD(ON) | 30ns - enables >1MHz PWM control in compact point-of-load regulators |
| RθJA | 488°C/W (min pad) - defines thermal derating curve for ambient-limited designs below +70°C |
Pinout & Package
Package: SOT523 - ultra-compact surface-mount plastic package (1.60 × 1.60 × 0.75 mm), moisture sensitivity level 1, matte tin–annealed terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Source) | Current return path for P-channel conduction | Connected to higher potential rail; requires low-impedance trace to minimize voltage drop during load switching |
| 2 (Gate) | Control electrode for channel formation | ESD-protected input; driven by open-drain or push-pull logic with <729Ω series resistance for ringing suppression |
| 3 (Drain) | Current output node to load | Connected to load ground or low-side return; body diode conducts from source to drain when VSD > 0.8V |
Key Features
| Feature | Design Value |
|---|---|
| Low RDS(ON) at logic-level VGS | 1.7Ω @ -4.5V enables direct MCU GPIO control without external driver stages |
| Fast switching with low Crss | 3pF reverse transfer capacitance reduces Miller effect, improving gate drive efficiency |
| AEC-Q101 qualified | Validated for automotive temperature range (-55°C to +150°C) and PPAP-capable manufacturing |
| ESD-protected gate | HBM rating ≥2kV per JESD22-A114 - eliminates need for external gate protection in board layout |
| Green, halogen-free construction | <900ppm Br/Cl, <1000ppm Sb - compliant with automotive OEM material declarations (e.g., GMW3172) |
Applications
| Automotive Body Control Module (BCM) | USB Power Delivery Load Switch |
|---|---|
|
Use Scenario: Isolating 12V accessory rails (e.g., infotainment USB ports) during key-off to prevent battery drain. IC Role / Device Role / Timing Role: High-side P-channel switch controlled by BCM microcontroller GPIO with active-low enable. Use Value: 0.9Ω RDS(ON) limits standby current to <10µA via gate leakage, meeting ISO 16750-2 quiescent current requirements. |
Use Scenario: Enabling/disabling VBUS power to downstream USB-C devices based on enumeration status. IC Role / Device Role / Timing Role: Logic-level controllable load switch placed between power source and Type-C connector CC detection circuitry. Use Value: 30ns tD(ON) ensures <100µs response to USB PD contract changes, preventing enumeration timeout failures. |
| Industrial Sensor Bias Supply | Compact DC-DC Converter Synchronous Rectifier |
|
Use Scenario: Providing regulated 5V bias to MEMS pressure sensors in HVAC control units exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Low-leakage P-MOSFET used in discrete LDO pass element configuration with external feedback divider. Use Value: -1μA IDSS at -24V ensures sensor supply stability over -40°C to +85°C without drift-induced calibration error. |
Use Scenario: Replacing Schottky diode in 3.3V/1A buck converter secondary side to improve efficiency in portable medical monitors. IC Role / Device Role / Timing Role: Synchronous rectifier driven by controller's complementary high-side gate signal with dead-time compensation. Use Value: 19pF Ciss allows clean gate drive at 2MHz switching frequency, reducing conduction loss by 42% vs. 0.4V-drop diode. |
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) (2.2Ω @ -4.5V), larger SO-8 package, dual N/P channel | Requires PCB real estate increase and gate driver for complementary topology | Choose only if dual-channel integration justifies size and cost penalty |
| AO3401 | SOT23 package, 1.1Ω RDS(ON) @ -4.5V, non-AEC-Q101, lower ESD rating (1.5kV HBM) | Lacks automotive qualification and fails PPAP documentation requirements | Select only for consumer-grade applications where AEC-Q101 is not mandated |
Compared with DMN3026LSD-13 and AO3401, DMP31D7LTQ-13 uniquely balances AEC-Q101 compliance, SOT523 footprint, and sub-2Ω RDS(ON) at logic-level drive - making it optimal for space- and reliability-critical automotive load switches.
Availability
DMP31D7LTQ-13 is available at Aetrix Electronics and suitable for automotive body electronics, USB-C power management, industrial sensor biasing, and compact DC-DC converter designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DMP31D7LTQ-13 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 DMP31D7LTQ belongs to Diodes' AEC-Q101-qualified small-signal MOSFET product line, engineered specifically for automotive power distribution and logic-level load switching where miniaturization and thermal reliability are critical.
FAQ
What is the maximum safe operating junction temperature for DMP31D7LTQ-13?
The absolute maximum junction temperature is +150°C per the datasheet's TJ specification. Derating begins at +70°C ambient due to RθJA = 488°C/W on minimum pad layout; at +85°C ambient, maximum continuous ID drops to -0.28A to maintain TJ ≤ 150°C. Thermal simulation using Figure 13 transient curves is recommended for pulsed operation.
Can DMP31D7LTQ-13 be used in reverse polarity protection circuits?
Yes - its integrated body diode conducts from source to drain when VSD > 0.8V, enabling use as a low-loss reverse polarity protector. With RDS(ON) = 0.9Ω at -10V VGS, forward voltage drop is ≤360mV at 0.4A, outperforming typical Schottky diodes. Gate must be tied to system ground through a pull-up resistor to ensure enhancement during normal operation.
Does DMP31D7LTQ-13 require a gate resistor for EMI suppression?
A 10–47Ω series gate resistor is recommended to dampen ringing caused by 729Ω intrinsic gate resistance interacting with PCB trace inductance and Ciss. Without it, measured tR = 74ns may exhibit overshoot exceeding ±20V on VGS, risking gate oxide stress. Resistor value should be validated with oscilloscope measurements on the target PCB stackup.
Is the SOT523 package compatible with standard reflow profiles for lead-free assembly?
Yes - the SOT523 package meets JEDEC J-STD-020 Level 1 moisture sensitivity and is qualified for peak reflow temperatures up to 260°C. Diodes specifies ramp rates ≤3°C/s and time above liquidus (TAL) of 60–90 seconds. Matte tin annealed terminals ensure reliable wetting on OSP- or ENIG-finished boards without voiding or dewetting.
DMP31D7LTQ-13 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-13 FAQ
1.How can I place an order for DMP31D7LTQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DMP31D7LTQ-13 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-13 reliable?
The price and inventory of DMP31D7LTQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMP31D7LTQ-13 is usually 5 days.
3.What payment methods are accepted for DMP31D7LTQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMP31D7LTQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DMP31D7LTQ-13?
DMP31D7LTQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DMP31D7LTQ-13 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-13?
For technical support, including DMP31D7LTQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMP31D7LTQ-13 requirements.
6.How does Aetrix verify that DMP31D7LTQ-13 is sourced from the original manufacturer or authorized distributors?
All DMP31D7LTQ-13 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-13 meets industry standards.
7.What is the process for return or replacement of DMP31D7LTQ-13?
All DMP31D7LTQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with DMP31D7LTQ-13, 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-13 part is unused and in its original packaging.
Return procedure for DMP31D7LTQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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