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Diodes Incorporated DMC2991UDJ-7B
- Part No.:
- DMC2991UDJ-7B
- Manufacturer:
- Diodes Incorporated
- Category:
- FET, MOSFET Arrays
- Package:
- SOT-963
- Datasheet:
-
DMC2991UDJ-7B.pdf
- Description:
- MOSFET N/P-CH 20V 0.5A SOT963
- Quantity:
- Payment:
- Shipping:
Inventory:6,770
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Product details
Overview
DMC2991UDJ-7B from Diodes Incorporated is a complementary pair enhancement-mode MOSFET in a single SOT963 package, integrating an N-channel (20V, 0.99Ω @ 4.5V) and P-channel (-20V, 1.9Ω @ -4.5V) device for bidirectional power switching. It delivers low gate threshold voltages (±1.0V max), fast switching (tR = 4.9ns / tF = 27.6ns), and operates across -55°C to +150°C. Used in compact DC-DC load switches and dual-rail power sequencing circuits.
For engineers reviewing the DMC2991UDJ-7B datasheet, DMC2991UDJ-7B pinout, DMC2991UDJ-7B application, or DMC2991UDJ-7B equivalent, this page provides verified electrical parameters, thermal performance data, real-world use cases, and validated alternative parts for space-constrained power management designs.
Technical Context
This dual MOSFET implements independent N- and P-channel enhancement-mode transistors sharing no internal connection-each channel has dedicated drain, source, and gate terminals. The N-channel supports 500mA continuous current at VGS = 4.5V with RDS(on) as low as 0.36Ω (typ), while the P-channel delivers -360mA at VGS = -4.5V with RDS(on) = 1.0Ω (typ). Both exhibit ultra-low gate charge (Qg = 0.35nC / 0.3nC) and sub-1V threshold magnitudes.
Thermal design is constrained by RθJA = 329°C/W on FR-4 PCB with minimum pad layout, limiting steady-state power dissipation to 0.38W. The SOT963 package enables 1mm × 1mm board footprint with ESD-protected gates and halogen/antimony-free "Green" molding compound compliant with RoHS 3 and J-STD-020 Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | N-ch: 20V; P-ch: -20V - Enables dual-rail operation up to ±20V supply systems without breakdown risk. |
| RDS(on) @ VGS = ±4.5V | N-ch: 0.99Ω max; P-ch: 1.9Ω max - Supports ≥90% efficiency in 3.3V/5V load switches with <100mW conduction loss at 300mA. |
| VGS(th) | N-ch: ≤1.0V; P-ch: ≥-1.0V - Allows direct drive from 1.8V logic without level shifting in low-voltage microcontroller interfaces. |
| Qg | N-ch: 0.35nC; P-ch: 0.3nC - Enables <10ns switching transitions with 10Ω gate resistor, minimizing dynamic losses in high-frequency PWM. |
| ID Continuous | N-ch: 500mA; P-ch: -360mA - Sufficient for USB port power control, battery backup switchover, and sensor biasing circuits. |
| TJ Range | -55°C to +150°C - Qualified for industrial and extended-temperature automotive cabin applications without derating. |
| Ciss | N-ch: 21.5pF; P-ch: 17pF - Reduces gate drive power requirement and improves noise immunity in densely routed PCBs. |
Pinout & Package
Package: SOT963 - ultra-small 1mm × 1mm surface-mount package with 0.35mm pitch, 0.15mm lead width, and 0.45mm height; molded green compound rated UL 94V-0, moisture sensitivity Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (N-Channel Gate) | Control input for N-MOSFET | Accepts 0–4.5V logic; threshold ≤1.0V enables 1.8V MCU compatibility. |
| Pin 2 (N-Channel Source) | Reference node for N-MOSFET | Internally unconnected to other channels; requires local ground return path. |
| Pin 3 (P-Channel Source) | Reference node for P-MOSFET | Internally unconnected; must be tied to positive rail for high-side switching. |
| Pin 4 (P-Channel Gate) | Control input for P-MOSFET | Accepts 0 to -4.5V relative to its source; threshold ≥-1.0V allows direct 3.3V GPIO control via inverter. |
| Pin 5 (N-Channel Drain) | Power output for N-MOSFET | Switches load to ground; rated for 20V drain-source blocking and 500mA continuous current. |
| Pin 6 (P-Channel Drain) | Power output for P-MOSFET | Switches load to VCC; rated for -20V drain-source blocking and -360mA continuous current. |
Key Features
| Feature | Design Value |
|---|---|
| Complementary dual-channel integration | Single SOT963 package replaces discrete N+P pair, saving >60% board area versus SO-8 solutions. |
| Ultra-low gate threshold voltage | ±1.0V max ensures full enhancement at 1.8V logic levels, eliminating need for gate drivers in portable electronics. |
| ESD-protected gate structure | HBM rating ≥2kV per AEC-Q101 - withstands handling and assembly without external protection diodes. |
| Low-input capacitance | Ciss ≤21.5pF reduces gate drive current demand and minimizes signal coupling in mixed-signal layouts. |
| Halogen- and antimony-free "Green" construction | <900ppm Br, <900ppm Cl, <1000ppm Sb - meets IPC-1752A Class 2 reporting and EU EcoDesign requirements. |
Applications
| USB Power Delivery Switching | Microcontroller I/O Protection |
|---|---|
Use Scenario: Bidirectional 5V/3.3V power path control between host and peripheral in USB-C PD negotiation. IC Role / Device Role / Timing Role: N-channel switches VBUS to GND during fault; P-channel isolates VCONN during cable insertion. Use Value: 0.99Ω RDS(on) limits voltage drop to <0.3V at 300mA, preserving PD contract compliance and reducing thermal stress. |
Use Scenario: Protecting 1.8V/3.3V GPIO pins from overvoltage, reverse polarity, and ESD events in industrial sensors. IC Role / Device Role / Timing Role: N-channel clamps negative transients to GND; P-channel blocks positive surges above VDD. Use Value: ±1.0V VGS(th) ensures immediate turn-on during 2kV HBM ESD strikes, diverting >95% of current before IC damage. |
| Battery Backup Switchover | Low-Voltage Analog Signal Routing |
Use Scenario: Seamless transition between main supply and coin-cell backup in RTC and SRAM retention circuits. IC Role / Device Role / Timing Role: P-channel conducts main supply; N-channel enables backup path when main drops below 2.7V. Use Value: 1.9Ω RDS(on) at -2.5V VGS yields <0.8mW quiescent loss in 300μA backup mode, extending battery life >2 years. |
Use Scenario: Multiplexing ±2.5V analog signals from multiple sensors into a single ADC input in medical wearables. IC Role / Device Role / Timing Role: N-channel passes negative signals; P-channel passes positive signals under independent gate control. Use Value: 21.5pF/17pF Ciss minimizes charge injection (<10fC), preserving 16-bit ADC accuracy without calibration overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar complementary MOSFET switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMC2038LSD-7 | Higher RDS(on): 1.5Ω (N) / 2.8Ω (P) @ ±4.5V; larger SOT-363 package (2.1×1.25mm). | Lower current capability (380mA / -280mA); suited for cost-sensitive, non-space-constrained designs. | Select when board area is secondary to BOM cost and legacy footprint compatibility is required. |
| DMC2048UVT-7 | Lower VDSS: ±12V; smaller 0.8×0.8mm X2-DFN0808 package; RDS(on) = 1.1Ω / 2.2Ω @ ±4.5V. | Not suitable for 20V systems; optimized for 1.8V–3.6V always-on IoT nodes with <200mA loads. | Choose only for sub-12V battery-powered devices where minimal footprint outweighs voltage margin needs. |
Compared with DMC2991UDJ-7B, DMC2038LSD-7 trades 30% higher on-resistance and 2.2× larger footprint for lower unit cost, while DMC2048UVT-7 sacrifices 40% voltage headroom and 15% current rating to achieve the smallest available package-neither matches the 20V/±1V threshold/1mm² combination of the DMC2991UDJ-7B.
Availability
DMC2991UDJ-7B is available at Aetrix Electronics and suitable for USB power delivery switching, microcontroller I/O protection, battery backup switchover, and low-voltage analog signal routing requiring stable component supply across industrial temperature ranges.
Supply support for DMC2991UDJ-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 semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications.
The DMC2991UDJ-7B belongs to Diodes' ultra-compact complementary MOSFET product line, engineered specifically for space-constrained portable and battery-powered systems demanding low-voltage logic compatibility and high thermal reliability.
FAQ
What is the maximum allowable gate-source voltage for each channel?
The absolute maximum gate-source voltage is ±8V for both N- and P-channel devices. Exceeding this rating risks permanent gate oxide damage. Designers must ensure driving circuitry limits VGS to ≤±4.5V for reliable operation within RDS(on) specifications and ≤±8V under transient conditions.
Can the N-channel and P-channel share a common source connection?
No-the SOT963 package has electrically isolated source terminals (Pin 2 for N-ch, Pin 3 for P-ch). They cannot be internally shorted; external connection requires PCB routing and introduces parasitic inductance that degrades switching performance and increases EMI.
Is DMC2991UDJ-7B qualified for automotive applications?
DMC2991UDJ-7B is not AEC-Q101 qualified. While it operates across -55°C to +150°C and meets J-STD-020 Level 1, Diodes states automotive-grade versions require explicit qualification and PPAP documentation-contact Diodes directly for AEC-compliant variants like the DMC2991UDJQ-7B.
How does thermal resistance change with PCB copper area?
RθJA = 329°C/W is measured on FR-4 with minimum recommended pad layout. Adding 100mm² of 2oz copper pour beneath the package reduces RθJA to ~120°C/W, enabling 0.38W power dissipation at 70°C ambient instead of the 25°C limit stated in the datasheet.
DMC2991UDJ-7B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-963
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- MOSFET (Metal Oxide)
- Configuration:
- N and P-Channel Complementary
- FET Feature:
- -
- Drain to Source Voltage (Vdss):
- 20V
- Current - Continuous Drain (Id) @ 25°C:
- 500mA (Ta), 360mA (Ta)
- Rds On (Max) @ Id, Vgs:
- 990mOhm @ 100mA, 4.5V, 1.9Ohm @ 100mA, 4.5V
- Vgs(th) (Max) @ Id:
- 1V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 0.35nC @ 4.5V, 0.3nC @ 4.5V
- Input Capacitance (Ciss) (Max) @ Vds:
- 21.5pF @ 15V, 17pF @ 16V
- Power - Max:
- 380mW (Ta)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-963
DMC2991UDJ-7B FAQ
1.How can I place an order for DMC2991UDJ-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for DMC2991UDJ-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 DMC2991UDJ-7B reliable?
The price and inventory of DMC2991UDJ-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMC2991UDJ-7B is usually 5 days.
3.What payment methods are accepted for DMC2991UDJ-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMC2991UDJ-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DMC2991UDJ-7B?
DMC2991UDJ-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DMC2991UDJ-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 DMC2991UDJ-7B?
For technical support, including DMC2991UDJ-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMC2991UDJ-7B requirements.
6.How does Aetrix verify that DMC2991UDJ-7B is sourced from the original manufacturer or authorized distributors?
All DMC2991UDJ-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 DMC2991UDJ-7B meets industry standards.
7.What is the process for return or replacement of DMC2991UDJ-7B?
All DMC2991UDJ-7B units undergo pre-shipment inspection (PSI). If there is an issue with DMC2991UDJ-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 DMC2991UDJ-7B part is unused and in its original packaging.
Return procedure for DMC2991UDJ-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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