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

Diodes Incorporated DMN4009LK3-13

Name: DMN4009LK3-13
Brand: Diodes Incorporated
SKU: DMN4009LK3-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DMN4009LK3-13

Manufacturer:: Diodes Incorporated

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: DMN4009LK3-13.pdf

Description:: MOSFET N-CH 40V 18A TO252-3

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Inventory:4,020

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Product details

Overview

DMN4009LK3-13 from Diodes Incorporated is a 40V N-channel enhancement-mode MOSFET in TO252-3L (DPAK) package, featuring 8.5mΩ R_DS(on) at V_GS = 10V and 27.6A continuous drain current at T_A = 25°C. It delivers low conduction loss and fast switching for high-efficiency DC-DC converters and LED backlighting circuits.

For engineers reviewing the DMN4009LK3-13 datasheet, DMN4009LK3-13 pinout, DMN4009LK3-13 application, or DMN4009LK3-13 equivalent, key selection criteria include R_DS(on) at 4.5V (14mΩ), body diode recovery (t_rr = 141ns), thermal resistance (R_θJA = 28.6°C/W on 50mm×50mm 2oz FR4), and RoHS-compliant "Green" packaging.

Technical Context

This MOSFET employs planar trench-gate technology to achieve low R_DS(on) while maintaining robust switching performance. Its gate threshold voltage (1.0–3.0V) supports 3.3V and 5V logic-level drive, and its 21nC total gate charge at V_GS = 4.5V enables efficient operation in synchronous buck topologies.

The integrated body diode exhibits 0.82V forward voltage at 14A and 141ns reverse recovery time, supporting high-frequency hard-switched and quasi-resonant power stages. Thermal design is enabled by validated R_θJL = 0.85°C/W (junction-to-lead), critical for PCB copper-area-limited applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	40V - Maximum blocking voltage for 12V/24V input DC-DC stages with 2× safety margin
R_DS(on) @ 10V	8.5mΩ - Enables ≤1.5W conduction loss at 20A in high-current POL converters
R_DS(on) @ 4.5V	14mΩ - Ensures full enhancement with standard 5V microcontroller GPIO drive
I_D (continuous)	27.6A @ T_A=25°C - Supports >25A output rails with forced-air cooling
t_rr	141ns - Limits switching loss and EMI in 500kHz–1MHz SMPS designs
Q_g @ 4.5V	21nC - Matches low-side gate drivers with <1A peak output capability
R_θJA	28.6°C/W - Requires ≥50mm×50mm 2oz copper pad for 4.36W steady-state dissipation

Pinout & Package

Package: TO252-3L (DPAK), surface-mount, molded plastic case with matte tin-plated copper leadframe; UL 94V-0 rated, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
D (Drain)	Main power path output terminal	Connected to large copper pour for heat sinking and low-inductance high-current routing
S (Source)	Reference node for gate drive and current sensing	Common return path for load current and gate driver ground; requires Kelvin connection for precision sensing
G (Gate)	Control input for channel modulation	High-impedance node requiring RC snubber or gate resistor (≈6Ω) to damp ringing and control dV/dt

Key Features

Feature	Design Value
Low R_DS(on) at 4.5V	14mΩ enables direct drive from 5V microcontrollers without level-shifting circuitry
Fast body diode recovery	141ns t_rr reduces cross-conduction loss and improves efficiency in synchronous rectification
Thermally optimized leadframe	R_θJL = 0.85°C/W allows >80% of junction heat to transfer directly to PCB copper via drain pad
RoHS-compliant "Green" construction	Halogen- and antimony-free molding compound meets EU environmental compliance requirements

Applications

LED Backlighting

DC-DC Buck Converter

Use Scenario: Driving parallel strings of white LEDs in LCD TV and monitor backlights.

IC Role / Device Role / Timing Role: High-side or low-side switch controlling constant-current LED string current.

Use Value: 8.5mΩ R_DS(on) minimizes power loss in 2–5A LED current paths, improving thermal margin and luminance stability.

Use Scenario: Synchronous rectifier in 12V-to-3.3V/5V point-of-load converters for FPGA and SoC power rails.

IC Role / Device Role / Timing Role: Low-side switch in buck topology, operating at 500kHz–1MHz with PWM control.

Use Value: 21nC Q_g and 141ns t_rr reduce gate drive loss and body diode conduction loss, enabling >94% efficiency at 20A.

Power Management IC Interface

Motor Driver Half-Bridge

Use Scenario: External power switch controlled by PMIC enable outputs in multi-rail power sequencing systems.

IC Role / Device Role / Timing Role: Standby power switch isolating downstream rails during system sleep states.

Use Value: 1.0–3.0V V_GS(th) ensures clean turn-on with 3.3V PMIC logic outputs, eliminating need for discrete level shifters.

Use Scenario: Low-side switch in 24V brushed DC motor H-bridge drivers for industrial actuators.

IC Role / Device Role / Timing Role: PWM-controlled current path for bidirectional motor control with regenerative braking.

Use Value: 96.6A pulsed drain rating and 0.82V V_SD support high peak currents and efficient freewheeling during PWM off-time.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMN4009LSD-13	Same die, SO-8 package; higher R_θJA (62°C/W), lower I_D (13.2A)	Limited to <10A loads; unsuitable for high-power thermal pads	Select when board space is constrained and power <10W; avoid for >15A applications
IRLML6344TRPBF	40V, 26mΩ @ 4.5V, 4.3A; smaller SOT-23 package, no drain pad	Only viable for <5A logic-level switching; lacks thermal mass for sustained loads	Choose only for ultra-low-power signal switching; not a functional replacement for DMN4009LK3-13

Compared with DMN4009LK3-13, DMN4009LSD-13 trades thermal performance for footprint reduction, while IRLML6344TRPBF sacrifices current capacity and thermal robustness for miniaturization-neither matches the original's 27.6A/8.5mΩ balance in DPAK form factor.

Availability

DMN4009LK3-13 is available at Aetrix Electronics and suitable for DC-DC converters, LED backlighting systems, and motor driver half-bridges requiring stable component supply and long-term industrial availability.

Supply support for DMN4009LK3-13 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 and signal integrity solutions for industrial, computing, and consumer markets.

The DMN4009LK3-13 belongs to Diodes' "Green" Power MOSFET product line, engineered specifically for high-efficiency, thermally demanding DC-DC conversion and LED driving applications where low R_DS(on) and fast switching are critical.

FAQ

Is DMN4009LK3-13 suitable for 5V logic-level gate drive?

Yes. With a gate threshold voltage range of 1.0–3.0V and R_DS(on) = 14mΩ at V_GS = 4.5V, it fully enhances using standard 5V microcontroller or PMIC outputs without external level shifting. Verified under pulsed conditions per datasheet Note 7.

What is the maximum continuous drain current at 70°C ambient?

The datasheet specifies 22.1A continuous drain current at T_A = 70°C with derating applied per Note 3. This assumes mounting on a 50mm × 50mm × 1.6mm FR4 PCB with 2oz copper, measured at t ≤ 10 seconds.

Does DMN4009LK3-13 have an integrated Schottky body diode?

No. It features a standard parasitic body diode inherent to vertical N-channel MOSFET structure. The diode has V_SD = 0.82V at 14A and t_rr = 141ns, but it is not a discrete Schottky diode; no separate cathode/anode terminals exist.

Can DMN4009LK3-13 be used in synchronous rectification?

Yes. Its low R_DS(on), fast body diode recovery (141ns), and low Q_gd/Q_gs ratio (10.7nC/7.3nC) make it suitable for synchronous rectification in buck and flyback topologies up to 1MHz, provided gate drive timing avoids shoot-through.

DMN4009LK3-13 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 40 V

Current - Continuous Drain (Id) @ 25°C:: 18A (Ta)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 8.5mOhm @ 14A, 10V

Vgs(th) (Max) @ Id:: 3V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 21 nC @ 4.5 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 2072 pF @ 20 V

FET Feature:: -

Power Dissipation (Max):: 2.19W (Ta)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252-3

DMN4009LK3-13 FAQ

1.How can I place an order for DMN4009LK3-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for DMN4009LK3-13 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 DMN4009LK3-13 reliable?

The price and inventory of DMN4009LK3-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMN4009LK3-13 is usually 5 days.

3.What payment methods are accepted for DMN4009LK3-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMN4009LK3-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DMN4009LK3-13?

DMN4009LK3-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DMN4009LK3-13 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 DMN4009LK3-13?

For technical support, including DMN4009LK3-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMN4009LK3-13 requirements.

6.How does Aetrix verify that DMN4009LK3-13 is sourced from the original manufacturer or authorized distributors?

All DMN4009LK3-13 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 DMN4009LK3-13 meets industry standards.

7.What is the process for return or replacement of DMN4009LK3-13?

All DMN4009LK3-13 units undergo pre-shipment inspection (PSI). If there is an issue with DMN4009LK3-13, 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 DMN4009LK3-13 part is unused and in its original packaging.

Return procedure for DMN4009LK3-13:

1.Submit a request within 90 days.

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

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