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Diodes Incorporated DMN2991UDJ
- Part No.:
- DMN2991UDJ
- Manufacturer:
- Diodes Incorporated
- Category:
- FET, MOSFET Arrays
- Package:
- SOT-963
- Datasheet:
-
DMN2991UDJ.pdf
- Description:
- MOSFET 2N-CH 20V 0.52A SOT963
- Quantity:
- Payment:
- Shipping:
Inventory:3,951
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Product details
Overview
DMN2991UDJ from Diodes Incorporated is a dual N-channel enhancement-mode MOSFET in SOT963 package, rated for 20V VDSS, 0.99Ω RDS(ON) at VGS = 4.5V, and 520mA ID (TA = +25°C), with gate threshold voltage ≤1.0V. It serves as a compact, low-voltage load switch in space-constrained DC-DC converters and power management rails.
For engineers reviewing the DMN2991UDJ datasheet, DMN2991UDJ pinout, DMN2991UDJ application, or DMN2991UDJ equivalent, key selection criteria include ultra-low VGS(TH) (≤1.0V), sub-1Ω on-resistance at 1.8V drive, 1mm × 1mm footprint, and ESD-protected gate-critical for battery-powered interface switching and always-on rail control.
Technical Context
This dual MOSFET integrates two matched N-channel devices in a single ultra-small SOT963 package, enabling independent or paralleled switching paths with identical low-threshold characteristics. Its RDS(ON) remains ≤1.2Ω down to VGS = 2.5V and ≤1.8Ω at VGS = 1.8V, supporting direct GPIO control from 1.8V/2.5V logic without level shifting.
The device features low input capacitance (Ciss = 21.5pF) and fast switching (tD(ON) = 5.6ns, tF = 27.6ns), minimizing switching losses in high-frequency buck regulators and load-switching applications where gate drive strength is limited.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | 20V - supports input rails up to 18V with 10% margin for transient spikes in portable power systems |
| RDS(ON) @ VGS = 4.5V | 0.99Ω max - enables <100mW conduction loss at 320mA, suitable for 500mA-class load switches |
| VGS(TH) max | 1.0V - ensures full enhancement with 1.2V–1.8V microcontroller I/O, eliminating need for external gate drivers |
| Ciss | 21.5pF - reduces gate drive current demand and improves efficiency in high-frequency (>1MHz) DC-DC controllers |
| PD | 0.4W - delivers 520mA continuous current on FR-4 PCB with minimum pad layout, limiting thermal rise to ~125°C junction |
| Package | SOT963 - 1.0mm × 1.0mm × 0.45mm footprint saves >70% board area vs. SOT-23, critical for wearables and TWS earbuds |
Pinout & Package
Package: SOT963 - ultra-compact 6-pin dual-source, dual-drain leadless plastic package with 0.35mm pitch, matte tin annealed terminals, and moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Source 1 | Low-impedance return path for Channel 1; internally connected to exposed thermal pad in standard layout |
| Pin 2 | Gate 1 | Control input for Channel 1; ESD-protected, compatible with 1.8V logic thresholds |
| Pin 3 | Drain 1 | High-side or low-side power path terminal for Channel 1; rated for 20V blocking and 520mA continuous |
| Pin 4 | Drain 2 | Independent power path terminal for Channel 2; electrically isolated from Drain 1, supports dual-rail switching |
| Pin 5 | Gate 2 | Control input for Channel 2; matched threshold and transconductance to Gate 1 for synchronized operation |
| Pin 6 | Source 2 | Return path for Channel 2; separate from Source 1, enabling floating or independently grounded configurations |
Key Features
| Feature | Design Value |
|---|---|
| Dual matched N-channel topology | Enables independent control of two power domains (e.g., VBUS and VCONN in USB-C) without cross-talk or shared thermal coupling |
| Ultra-low 1.0V max VGS(TH) | Guarantees turn-on with 1.2V supply rails, supporting next-gen ultra-low-power MCUs and energy-harvesting systems |
| 0.45mm max profile | Permits placement under connectors or beneath thin-film batteries in sub-3mm total thickness designs |
| ESD-protected gate (HBM ≥2kV) | Eliminates need for external gate protection diodes in handheld and wearable assembly lines |
| Lead-free, halogen-free, RoHS 3 compliant | Meets IPC-J-STD-020 Level 1 reflow requirements and automotive PPAP documentation standards |
Applications
| USB Type-C Power Delivery Switching | Wireless Earbud Battery Management |
|---|---|
|
Use Scenario: Selecting between alternate VBUS paths during USB-C cable orientation detection and PD contract negotiation. IC Role / Device Role / Timing Role: Dual-channel load switch controlling VBUS routing and VCONN power sequencing with <100ns channel isolation. Use Value: Eliminates discrete MOSFET arrays and level shifters, reducing BOM count by 4 components while maintaining 20V fault tolerance. |
Use Scenario: Enabling/disabling charging circuitry and audio codec power domains during sleep/wake transitions in true wireless stereo earbuds. IC Role / Device Role / Timing Role: Low-leakage power gate managing 1.8V and 3.3V rails with <1µA off-state current per channel. Use Value: Extends standby battery life by >30% versus standard SOT-23 switches due to sub-1V gate threshold and 0.027g mass. |
| IoT Sensor Node Power Gating | Medical Patch Monitor Load Control |
|
Use Scenario: Isolating BLE radio, environmental sensor, and MCU subsystems during deep-sleep cycles in battery-operated edge nodes. IC Role / Device Role / Timing Role: Dual independent switch providing rail-level power gating with <500ns enable propagation delay. Use Value: Achieves <100nA system quiescent current by cutting leakage paths across two isolated domains simultaneously. |
Use Scenario: Controlling power to ECG front-end amplifiers and Bluetooth LE transceivers in disposable wearable patches. IC Role / Device Role / Timing Role: Medical-grade load switch ensuring <10ppm/h drift stability and no latch-up under ESD events per IEC 61000-4-2. Use Value: Meets ISO 14971 risk management requirements for single-fault safety via integrated gate ESD protection and 150°C TJ max rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual N-channel low-threshold MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMN2004LKQ | Single-channel, same SOT963 package, 20V/0.85Ω @ 4.5V, but lacks second channel and has higher VGS(TH) (1.2V max) | Requires two devices for dual-path control, increasing layout area and thermal coupling risk | Select when only one switching path is needed and tighter RDS(ON) at 4.5V is prioritized over integration |
| AOB2012 | 20V dual N-channel in TSOP-6, 1.1Ω @ 4.5V, 1.5V VGS(TH) max, 1.6mm × 2.9mm footprint | 3.5× larger PCB area; requires level-shifting for 1.8V GPIO control | Choose for higher current (1.2A) capability where board space permits and gate drive voltage ≥2.5V is available |
Compared with DMN2991UDJ, DMN2004LKQ offers lower RDS(ON) but sacrifices dual-channel integration and 1.0V threshold compliance, while AOB2012 provides higher current handling at the cost of footprint size and 1.8V logic compatibility-making DMN2991UDJ optimal for miniaturized, ultra-low-voltage dual-rail systems.
Availability
DMN2991UDJ is available at Aetrix Electronics and suitable for USB-C power delivery modules, wireless earbud battery management systems, and IoT sensor node power gating requiring stable component supply and guaranteed long-term sourcing.
Supply support for DMN2991UDJ 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design centers across Asia, Europe, and the U.S., serving industrial, computing, consumer, and communications markets.
DMN2991UDJ belongs to Diodes' Ultra-Small Signal MOSFET product line, engineered specifically for space- and power-constrained portable electronics where sub-1V gate drive and 1mm² footprint are mandatory design requirements.
FAQ
What is the maximum junction temperature and thermal resistance of DMN2991UDJ?
The DMN2991UDJ has a maximum junction temperature (TJ) of +150°C and a thermal resistance from junction to ambient (RθJA) of 312°C/W on FR-4 PCB with minimum recommended pad layout. This allows 520mA continuous current at +25°C ambient, derating linearly to 415mA at +70°C ambient per the datasheet's steady-state ratings.
Does DMN2991UDJ support simultaneous conduction of both channels?
Yes-both N-channel MOSFETs operate independently with matched VGS(TH) and RDS(ON) characteristics. The datasheet confirms identical electrical specs for each channel, and the SOT963 pinout isolates Source 1/Pin 1 and Source 2/Pin 6, enabling true dual-rail control without internal coupling.
Is DMN2991UDJ qualified for automotive applications?
No-DMN2991UDJ is not AEC-Q101 qualified. The datasheet explicitly states that automotive-grade versions require specific change control, PPAP capability, and IATF 16949 manufacturing; this part is intended for commercial/industrial portable electronics, not automotive systems.
What is the gate charge and how does it affect switching performance?
DMN2991UDJ has a total gate charge (Qg) of 0.35nC at VGS = 4.5V, with Qgs = 0.07nC and Qgd = 0.08nC. This low charge enables fast switching (tD(ON) = 5.6ns, tF = 27.6ns) using weak GPIO drivers, reducing dynamic losses in 1–3MHz DC-DC converters without external gate buffers.
DMN2991UDJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-963
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- MOSFET (Metal Oxide)
- Configuration:
- 2 N-Channel (Dual)
- FET Feature:
- -
- Drain to Source Voltage (Vdss):
- 20V
- Current - Continuous Drain (Id) @ 25°C:
- 520mA (Ta)
- Rds On (Max) @ Id, Vgs:
- 990mOhm @ 100mA, 4.5V
- Vgs(th) (Max) @ Id:
- 1V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 0.35C @ 4.5V
- Input Capacitance (Ciss) (Max) @ Vds:
- 21.5pF @ 15V
- Power - Max:
- 400mW (Ta)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-963
DMN2991UDJ FAQ
1.How can I place an order for DMN2991UDJ through Aetrix?
Please submit a Request for Quotation (RFQ) for DMN2991UDJ 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 DMN2991UDJ reliable?
The price and inventory of DMN2991UDJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMN2991UDJ is usually 5 days.
3.What payment methods are accepted for DMN2991UDJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMN2991UDJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DMN2991UDJ?
DMN2991UDJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DMN2991UDJ 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 DMN2991UDJ?
For technical support, including DMN2991UDJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMN2991UDJ requirements.
6.How does Aetrix verify that DMN2991UDJ is sourced from the original manufacturer or authorized distributors?
All DMN2991UDJ 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 DMN2991UDJ meets industry standards.
7.What is the process for return or replacement of DMN2991UDJ?
All DMN2991UDJ units undergo pre-shipment inspection (PSI). If there is an issue with DMN2991UDJ, 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 DMN2991UDJ part is unused and in its original packaging.
Return procedure for DMN2991UDJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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