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

Diodes Incorporated DMN2991UT-13

Name: DMN2991UT-13
Brand: Diodes Incorporated
SKU: DMN2991UT-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DMN2991UT-13

Manufacturer:: Diodes Incorporated

Category:: FETs, MOSFETs

Package:: SOT-523

Datasheet:: DMN2991UT-13.pdf

Description:: MOSFET BVDSS: 8V~24V SOT523 T&R

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Product details

Overview

DMN2991UT-13 from Diodes Incorporated is an N-channel enhancement-mode MOSFET in SOT523 package, rated for 20V V_DSS, 0.3A continuous drain current at T_A = +25°C, with R_DS(ON) = 3Ω @ V_GS = 4.5V and ultra-low gate threshold voltage (V_GS(TH) ≤ 1.0V). It serves as a compact, low-voltage load switch in space-constrained power management circuits.

For engineers reviewing the DMN2991UT datasheet, DMN2991UT pinout, DMN2991UT application, or DMN2991UT equivalent, key selection criteria include its 1.0V max V_GS(TH), 0.28W power dissipation on FR-4, SOT523 footprint compatibility, and suitability for battery-powered DC-DC converter enable paths requiring fast switching and minimal gate drive.

Technical Context

This MOSFET employs planar silicon technology optimized for low-voltage logic-level operation, enabling direct interface with 1.8V/2.5V GPIOs without level-shifting. Its R_DS(ON) remains stable across –55°C to +150°C junction temperature, supported by normalized on-resistance curves showing <15% drift at 150°C vs. 25°C under V_GS = 4.5V.

The device integrates ESD protection on gate terminals (HBM > 2kV), features C_iss = 21.5pF and Q_g = 0.35nC for rapid turn-on (t_r = 4.9ns), and maintains low leakage (I_DSS ≤ 1μA at V_DS = 16V) critical for always-on subsystems.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	20V - Maximum drain-source blocking voltage for 3.3V/5V rail switching
R_DS(ON)	3Ω @ V_GS = 4.5V - Enables ≤300mW conduction loss at 0.3A in compact layouts
V_GS(TH)	≤1.0V - Ensures full enhancement with 1.8V I/O controllers; no external bias required
Q_g	0.35nC - Supports >1MHz switching in load-switch applications with minimal gate drive energy
P_D	0.28W (FR-4, min pad) - Limits thermal rise to ~125°C at 0.3A ambient; requires no heatsink
C_iss	21.5pF - Reduces capacitive loading on driving GPIOs; improves noise immunity in dense PCBs

Pinout & Package

SOT523 is a 3-pin ultra-small surface-mount package (1.60 × 1.60 × 0.75 mm) with gull-wing leads, moisture sensitivity level 1, and matte tin annealed terminations solderable per MIL-STD-202.

Pin/Terminal	Circuit Role	Design Meaning
G	Gate	Logic-level control input; ESD-protected; drives with ≤0.35nC charge for fast edge rates
S	Source	Reference node for gate drive; tied to system ground or low-side return path
D	Drain	Switched high-side or low-side output; handles up to 0.3A continuous with 20V max swing

Key Features

Feature	Design Value
Ultra-low gate threshold	V_GS(TH) ≤ 1.0V enables direct drive from 1.8V microcontrollers without level shifters
Low R_DS(ON) at low V_GS	6Ω @ V_GS = 1.8V supports efficient operation in 2.5V/3.3V power domains
ESD-protected gate	HBM > 2kV rating reduces risk of field failure during board assembly and handling
Green, lead-free construction	Halogen- and antimony-free molding compound meets IEC 61249-2-21 and RoHS 3 compliance

Applications

Battery-Powered Load Switching

USB Port Power Control

Use Scenario: Enabling/disabling power to peripheral modules (e.g., BLE radio, sensor hub) in wearables to extend battery life.

IC Role / Device Role / Timing Role: Low-side load switch controlled by MCU GPIO; operates in on/off mode with <100ns transition times.

Use Value: 1.0V V_GS(TH) ensures reliable turn-on with 1.8V I/O; 0.21A capability at 1.8V V_GS matches typical sensor module peak loads.

Use Scenario: Controlling VBUS power delivery to downstream USB devices in portable hubs or docking stations.

IC Role / Device Role / Timing Role: High-side switch isolating USB 5V rail; driven by USB controller's over-current fault signal.

Use Value: 20V V_DSS margin accommodates 5.5V USB transient spikes; low C_iss prevents signal integrity degradation on adjacent data lines.

DC-DC Converter Enable Path

Always-On System Supervisor

Use Scenario: Gate-driving the EN pin of buck converters (e.g., AP6320x) in multi-rail PMICs where enable sequencing must tolerate 1.8V logic.

IC Role / Device Role / Timing Role: Logic-level translator between low-voltage supervisor IC and higher-voltage converter enable input.

Use Value: 0.35nC Q_g allows clean, jitter-free enable pulses; 1μA I_DSS prevents false triggering in sleep states.

Use Scenario: Monitoring backup battery voltage in real-time clocks (e.g., RV-3028-C7) and asserting reset when main supply fails.

IC Role / Device Role / Timing Role: Low-leakage switch isolating RTC V_BAT from system ground during main power loss.

Use Value: 1μA max I_DSS preserves coin-cell lifetime beyond 10 years; -55°C to +150°C rating supports industrial storage environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel logic-level MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMN2004LK3-7	R_DS(ON) = 2.2Ω @ V_GS = 4.5V; SOT-723 package (smaller footprint, 1.2 × 1.2 mm)	Higher current density but lower thermal mass; unsuitable for >0.25A continuous without derating	Select for tighter board area constraints where 0.25A max load suffices and thermal margin is verified
AO3400	R_DS(ON) = 28mΩ @ V_GS = 10V; SOT-23 package; V_GS(TH) = 0.7–1.4V (wider distribution)	Lower R_DS(ON) but requires ≥2.5V gate drive for consistent turn-on; larger 2.9 × 1.3 mm footprint	Select only if gate drive ≥2.5V is guaranteed and board space permits SOT-23; avoid for 1.8V-only systems

Compared with DMN2991UT-13, DMN2004LK3-7 offers smaller size but reduced thermal headroom, while AO3400 delivers lower on-resistance only with higher gate voltage-making DMN2991UT uniquely suited for 1.8V–2.5V logic-driven, space-limited load switching.

Availability

DMN2991UT-13 is available at Aetrix Electronics and suitable for battery-powered load switching, USB port power control, and DC-DC converter enable paths requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for DMN2991UT-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, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

DMN2991UT belongs to Diodes' logic-level MOSFET product line, engineered specifically for ultra-low-voltage switching in portable and energy-sensitive applications where gate drive voltage is constrained to 1.8V–2.5V.

FAQ

What is the maximum continuous drain current for DMN2991UT-13 at 75°C ambient?

The datasheet specifies 0.24A continuous drain current at T_A = +75°C with V_GS = 4.5V, based on thermal derating from the 0.3A rating at 25°C. This reflects the device's R_θJA = 439°C/W on standard FR-4 and must be validated against actual PCB copper area and airflow conditions.

Can DMN2991UT-13 be used in high-side switching configurations?

Yes-it supports high-side switching when the source is tied to the positive rail and gate is driven above that rail. However, due to its 20V V_DSS rating and lack of integrated charge pump, it requires a gate driver capable of generating V_GS ≥ 4.5V relative to the source node, limiting use to low-voltage rails (≤5V).

Is the SOT523 package compatible with standard reflow profiles for lead-free soldering?

Yes-the SOT523 package uses matte tin annealed terminations qualified per J-STD-020 Level 1 moisture sensitivity and is compatible with IPC/JEDEC J-STD-020D reflow profiles, including peak temperatures up to 260°C for ≤10 seconds, provided board layout follows Diodes' recommended pad dimensions.

Does DMN2991UT-13 have avalanche rating or SOA curve validation?

No-datasheet Figure 12 shows Safe Operating Area (SOA) only for single-pulse conditions (100µs to 10s) under DC and pulsed loads, with no rated repetitive avalanche energy. Designers must implement external clamping or current limiting for inductive load switching to prevent unclamped inductive switching (UIS) failure.

DMN2991UT-13 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SOT-523

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 20 V

Current - Continuous Drain (Id) @ 25°C:: 300mA (Ta)

Drive Voltage (Max Rds On, Min Rds On):: 1.5V, 4.5V

Rds On (Max) @ Id, Vgs:: 3Ohm @ 100mA, 4.5V

Vgs(th) (Max) @ Id:: 1V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 0.35 nC @ 4.5 V

Vgs (Max):: ±10V

Input Capacitance (Ciss) (Max) @ Vds:: 21.5 pF @ 15 V

FET Feature:: -

Power Dissipation (Max):: 280mW (Ta)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-523

DMN2991UT-13 FAQ

1.How can I place an order for DMN2991UT-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for DMN2991UT-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 DMN2991UT-13 reliable?

The price and inventory of DMN2991UT-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMN2991UT-13 is usually 5 days.

3.What payment methods are accepted for DMN2991UT-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMN2991UT-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DMN2991UT-13?

DMN2991UT-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DMN2991UT-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 DMN2991UT-13?

For technical support, including DMN2991UT-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMN2991UT-13 requirements.

6.How does Aetrix verify that DMN2991UT-13 is sourced from the original manufacturer or authorized distributors?

All DMN2991UT-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 DMN2991UT-13 meets industry standards.

7.What is the process for return or replacement of DMN2991UT-13?

All DMN2991UT-13 units undergo pre-shipment inspection (PSI). If there is an issue with DMN2991UT-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 DMN2991UT-13 part is unused and in its original packaging.

Return procedure for DMN2991UT-13:

1.Submit a request within 90 days.

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

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