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

Infineon Technologies IRLL2703TR

Name: IRLL2703TR
Brand: Infineon Technologies
SKU: IRLL2703TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRLL2703TR

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-261-4, TO-261AA

Datasheet:: IRLL2703TR.pdf

Description:: MOSFET N-CH 30V 3.9A SOT223

Quantity:: RFQ Add To RFQ list

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Inventory:3,457

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Product details

Overview

IRLL2703TR from International Rectifier is a 30V, 3.9A N-channel enhancement-mode power MOSFET in SOT-223 package, optimized for low-voltage DC-DC conversion and load switching. It delivers R_DS(on) = 0.045Ω @ V_GS = 10V, 3.9A; features fully avalanche-rated ruggedness (E_AS = 180 mJ); and supports fast switching (t_r = 24 ns, t_f = 14 ns) in compact surface-mount designs.

For engineers reviewing the IRLL2703TR datasheet, IRLL2703TR pinout, IRLL2703TR application, or IRLL2703TR equivalent, key selection criteria include its 30V V_DSS, 0.045Ω on-resistance at 10V gate drive, SOT-223 thermal performance (R_θJA = 90°C/W on FR-4), body diode recovery (t_rr = 42 ns), and ±16V gate voltage rating.

Technical Context

This HEXFET® device uses fifth-generation silicon processing to minimize conduction loss per unit area while maintaining robust SOA and unclamped inductive switching capability. Its gate charge profile (Q_g = 9.3 nC typ.) and low C_iss (530 pF) enable efficient operation in high-frequency PWM circuits up to several hundred kHz.

The integrated body diode exhibits V_SD = 1.0 V @ I_S = 2.3A and t_rr = 42 ns, supporting synchronous rectification and flyback recovery in non-isolated converters. Thermal design leverages the SOT-223's exposed drain tab for direct PCB copper heatsinking.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	30 V - Maximum blocking voltage before avalanche; suitable for 24V rail systems with margin.
R_DS(on)	0.045 Ω @ V_GS = 10V, I_D = 3.9A - Enables <175 mW conduction loss at full rated current.
I_D (continuous)	3.9 A @ T_A = 25°C - Validated continuous current under standard PCB mount conditions.
Q_g	9.3 nC typ. - Determines gate driver strength requirement for <100 ns switching transitions.
t_r/t_f	24 ns / 14 ns - Supports >500 kHz switching in buck regulators without excessive switching loss.
E_AS	180 mJ - Withstands single-pulse inductive energy events without failure in motor or solenoid drive.
R_θJA	90 °C/W - Junction-to-ambient thermal resistance on FR-4 board; defines max. power dissipation at ambient temperature.

Pinout & Package

The IRLL2703TR is housed in a surface-mount SOT-223 package with an exposed drain tab for thermal conduction to PCB copper. The package footprint conforms to EIA-481 standards and supports vapor-phase, infrared, and wave soldering.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Source)	Source terminal of N-channel MOSFET	Reference node for gate drive; connects to ground or low-side return path.
Pin 2 (Gate)	Control electrode	Receives 0–10 V logic-level signal; requires ≤9.3 nC charge for full turn-on.
Pin 3 (Drain)	Power output terminal	Exposed metal tab; electrically and thermally connected to drain; must be routed to high-current trace or thermal pad.
Pin 4 (Source)	Secondary source connection	Redundant source bond; improves current sharing and reduces source inductance in high-di/dt applications.

Key Features

Feature	Design Value
Ultra-low R_DS(on)	0.045 Ω enables <200 mW conduction loss at 3.9A, reducing thermal stress in space-constrained layouts.
Fully avalanche-rated	180 mJ single-pulse energy rating allows reliable operation in inductive load switching without external snubbers.
Fast switching	24 ns rise / 14 ns fall time minimizes transition losses in high-frequency DC-DC converters (>300 kHz).
SOT-223 thermal design	Exposed drain tab provides direct thermal path to PCB copper, achieving 50°C/W R_θJA on 1-in² copper.
Logic-level gate drive	V_GS(th) = 1.0–2.4 V ensures full enhancement with standard 3.3V or 5V microcontroller outputs.

Applications

Motor Control

DC-DC Conversion

Use Scenario: Driving small brushed DC motors (e.g., fans, pumps) in battery-powered industrial tools.

IC Role / Device Role / Timing Role: Low-side switch controlling motor current path; handles repetitive 3.9A pulses with fast turn-off to prevent shoot-through.

Use Value: 0.045Ω R_DS(on) limits I²R heating during continuous 3A operation, extending battery runtime and enabling fanless enclosure design.

Use Scenario: Synchronous rectifier in 12V-to-3.3V buck converter for FPGA I/O supply.

IC Role / Device Role / Timing Role: High-efficiency low-side switch replacing Schottky diode; commutated at 500 kHz with precise gate timing.

Use Value: 24 ns rise time and 9.3 nC Q_g allow clean zero-voltage switching, reducing total power loss by >35% vs. diode solution.

Load Switching

LED Driver

Use Scenario: Hot-swap power management for peripheral modules in telecom line cards.

IC Role / Device Role / Timing Role: Inrush-limited main power switch; controlled via microcontroller GPIO with soft-start sequencing.

Use Value: Fully rated 30V V_DSS and 180 mJ E_AS tolerate transient overvoltage during hot-plug insertion without clamping components.

Use Scenario: Constant-current dimming switch for high-brightness LED strings in automotive interior lighting.

IC Role / Device Role / Timing Role: PWM-controlled current sink; switched at 1–5 kHz to avoid audible noise.

Use Value: 1.0 V body diode forward drop and 42 ns reverse recovery minimize conduction loss and ringing during PWM off-cycle.

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
DMN3025LSD-13	R_DS(on) = 0.025Ω @ 4.5V, but V_DSS = 30V same; Q_g = 11.5 nC higher; SOT-23-3 package.	Higher current density but lower thermal mass; unsuitable for >2A continuous without derating.	Prefer for ultra-compact 2A loads where gate drive is ≥4.5V; avoid for >2.5A or high-temperature environments.
SI2303DS-T1-GE3	R_DS(on) = 0.095Ω @ 4.5V; V_DSS = 30V; SOT-23 package; lower cost but higher conduction loss.	Lower thermal performance (R_θJA ≈ 200°C/W); limited to intermittent 1.5A operation.	Select only for cost-sensitive, low-duty-cycle applications below 1A; not recommended for continuous 3A use.

Compared with DMN3025LSD-13 and SI2303DS-T1-GE3, IRLL2703TR offers balanced trade-offs: superior thermal capability via SOT-223, verified 3.9A continuous rating, and rugged 180 mJ avalanche tolerance-making it optimal for industrial-grade 3A switching where reliability and thermal headroom are critical.

Availability

IRLL2703TR is available at Aetrix Electronics and suitable for motor control, DC-DC conversion, and load switching applications requiring stable component supply and long-term industrial availability.

Supply support for IRLL2703TR 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

International Rectifier (now part of Infineon Technologies) was a pioneer in power MOSFET design, known for HEXFET® technology and high-reliability discrete semiconductors.

The IRLL2703TR belongs to the fifth-generation HEXFET® family, engineered specifically for high-efficiency, surface-mount power switching in space-constrained industrial and consumer power supplies.

FAQ

Is IRLL2703TR suitable for 3.3V microcontroller gate drive?

Yes. With V_GS(th) ranging from 1.0 V to 2.4 V and full enhancement achievable at V_GS = 4.5 V, the IRLL2703TR operates reliably with 3.3V logic outputs. At 3.3V, R_DS(on) rises to ~0.070Ω (per datasheet), supporting up to ~2.0A continuous current with acceptable loss in most applications.

What is the maximum PCB copper area needed to achieve 2.1W power dissipation?

To reach the 2.1W rating (PD @ T_A = 25°C on 1-inch square copper board), the device requires a minimum 25.4 mm × 25.4 mm (1 in²) copper pour connected directly to the exposed drain tab. Thermal vias under the tab and inner-layer copper planes further improve heat spreading and reduce effective R_θJA to 50°C/W.

Does IRLL2703TR have built-in ESD protection?

No. The IRLL2703TR does not integrate on-chip ESD protection diodes. Per datasheet handling guidelines, it is classified as Class 1B per JEDEC JS-001 (≤250V HBM). System-level ESD protection (e.g., TVS on gate line) is recommended when exposed to user-accessible interfaces or automated handling.

Can IRLL2703TR replace IRFL014 in existing designs?

Yes, with verification. Both share identical SOT-223 package, pinout, and 30V/3.9A ratings, but IRLL2703TR has lower R_DS(on) (0.045Ω vs. 0.055Ω) and improved Q_g (9.3 nC vs. 12 nC). Layout compatibility is confirmed; thermal and switching performance will improve, though gate drive timing may require minor adjustment due to reduced capacitance.

IRLL2703TR Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-261-4, TO-261AA

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 3.9A (Ta)

Drive Voltage (Max Rds On, Min Rds On):: 4V, 10V

Rds On (Max) @ Id, Vgs:: 45mOhm @ 3.9A, 10V

Vgs(th) (Max) @ Id:: 2.4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 14 nC @ 5 V

Vgs (Max):: ±16V

Input Capacitance (Ciss) (Max) @ Vds:: 530 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 1W (Ta)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-223

IRLL2703TR FAQ

1.How can I place an order for IRLL2703TR through Aetrix?

Please submit a Request for Quotation (RFQ) for IRLL2703TR 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 IRLL2703TR reliable?

The price and inventory of IRLL2703TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRLL2703TR is usually 5 days.

3.What payment methods are accepted for IRLL2703TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRLL2703TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRLL2703TR?

IRLL2703TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRLL2703TR 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 IRLL2703TR?

For technical support, including IRLL2703TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRLL2703TR requirements.

6.How does Aetrix verify that IRLL2703TR is sourced from the original manufacturer or authorized distributors?

All IRLL2703TR 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 IRLL2703TR meets industry standards.

7.What is the process for return or replacement of IRLL2703TR?

All IRLL2703TR units undergo pre-shipment inspection (PSI). If there is an issue with IRLL2703TR, 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 IRLL2703TR part is unused and in its original packaging.

Return procedure for IRLL2703TR:

1.Submit a request within 90 days.

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

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