Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Infineon Technologies IRLL2703

Name: IRLL2703
Brand: Infineon Technologies
SKU: IRLL2703
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: IRLL2703

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

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

Datasheet:: IRLL2703.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,257

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

IRLL2703 from International Rectifier is a 30V N-channel enhancement-mode Power MOSFET in SOT-223 package, rated for 3.9A continuous drain current at 25°C, with 0.045Ω R_DS(on) at V_GS = 10V and fully avalanche-rated for robust switching in DC-DC converters and motor control stages.

For engineers reviewing the IRLL2703 datasheet, IRLL2703 pinout, IRLL2703 application, or IRLL2703 equivalent, key selection criteria include its low on-resistance at 4.0V gate drive, fast 24ns rise time, 1.0W PCB-mount power dissipation, and thermal resistance of 90°C/W (J-A) on FR-4 - critical for compact high-efficiency power stage design.

Technical Context

This HEXFET® device uses fifth-generation silicon processing to minimize conduction loss while maintaining rugged unclamped inductive switching capability (E_AS = 180mJ). Its body diode exhibits 42ns reverse recovery time and 62nC Q_rr, supporting synchronous rectification in buck topologies.

The SOT-223 package integrates an enlarged copper tab for enhanced heatsinking, enabling 2.1W power dissipation on 1-inch² copper board. Gate charge parameters (Q_g = 9.3nC typ., Q_gd = 5.1nC) support efficient 1MHz-class switching with low driver loss.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	30V - Maximum blocking voltage in off-state; sets upper limit for input rail in 24V systems.
R_DS(on)	0.045Ω @ V_GS = 10V - Enables <175mW conduction loss at 3.9A, reducing thermal load in space-constrained layouts.
I_D (continuous)	3.9A @ T_A = 25°C - Sustains full-load current without forced airflow on standard FR-4 PCBs.
Q_g	9.3nC typ. - Low gate charge allows fast turn-on with minimal driver IC power consumption.
t_r/t_f	24ns / 14ns - Supports high-frequency PWM operation up to ~1MHz with controlled EMI.
E_AS	180mJ - Withstands single-pulse inductive energy without failure, critical for relay/motor snubbing.
R_θJA	90°C/W (FR-4) - Predictable junction temperature rise enables accurate thermal margining without heatsinks.

Pinout & Package

SOT-223 package with exposed drain tab for thermal conduction; surface-mount compatible with vapor-phase, infrared, or wave soldering. Tab is electrically connected to Drain (Pin 2).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Source)	Source terminal of N-channel MOSFET	Reference node for gate drive; connects to low-side return path in buck/half-bridge configurations.
Pin 2 (Drain)	Drain terminal + thermal pad	Main current-carrying and heat-dissipating node; must be routed to large copper pour for thermal performance.
Pin 3 (Gate)	Control electrode	High-impedance input requiring <10V threshold; sensitive to ESD; needs local 100nF bypass near driver.
Pin 4 (Source)	Second source connection	Redundant source bond wire; electrically tied to Pin 1 internally - improves current sharing and reduces package inductance.

Key Features

Feature	Design Value
Fully avalanche-rated	180mJ single-pulse energy rating ensures reliable operation under inductive load switching stress.
Ultra-low R_DS(on)	0.045Ω at 10V gate drive enables >95% efficiency in 3.3–5V logic-level driven 24V-input converters.
Fast switching	7.4ns turn-on delay + 24ns rise time supports high-frequency (>500kHz) SMPS designs with low switching loss.
Lead-free SOT-223	RoHS-compliant package with thermally enhanced tab; compatible with automated pick-and-place and reflow profiles.
Body diode optimized	42ns t_rr and low Q_rr (62nC) reduce reverse recovery loss in synchronous rectifier applications.

Applications

DC-DC Buck Converter

Low-Voltage Motor Driver

Use Scenario: Step-down regulation from 24V to 5V/3.3V in industrial PLC I/O modules.

IC Role / Device Role / Timing Role: Low-side synchronous rectifier switch operating at 500kHz PWM frequency.

Use Value: 0.045Ω R_DS(on) limits conduction loss to <175mW at 3.9A, eliminating need for external heatsink on 2-layer PCB.

Use Scenario: H-bridge half-bridge leg driving 12V brushed DC motors in portable medical pumps.

IC Role / Device Role / Timing Role: High-speed, logic-level-compatible N-channel switch controlled directly by MCU GPIO.

Use Value: 1.0V gate threshold and 2.4V max V_GS(th) ensure full enhancement with 3.3V microcontroller outputs.

LED Constant-Current Driver

Load Switch for USB-C PD Sink

Use Scenario: Precision current sink for high-brightness LED strings in automotive interior lighting.

IC Role / Device Role / Timing Role: Analog-controlled current regulator using source degeneration feedback.

Use Value: Tight R_DS(on) tolerance (±20%) and low tempco (0.06V/°C) enable stable current over -40°C to +125°C ambient.

Use Scenario: Inrush-limited 5–20V power path switch for USB-C Power Delivery receivers.

IC Role / Device Role / Timing Role: Hot-swap MOSFET with integrated gate resistor network for controlled dV/dt.

Use Value: 5.0V/ns dv/dt rating prevents false triggering during hot-plug transients; 3.9A pulsed rating handles 3A PD3.0 loads.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMN3025LSD-13	R_DS(on) = 0.028Ω @ 4.5V (lower), but SOT-23-3 package limits power handling to 1.4W.	Not suitable for >2A continuous loads due to higher thermal resistance (170°C/W).	Select when gate drive is limited to 4.5V and current ≤2A; avoid for motor or converter output stages.
SI2303DS-T1-E3	R_DS(on) = 0.095Ω @ 4.5V (higher), SOT-23 package, lower Q_g (4.5nC).	Better for ultra-low-power always-on switches; insufficient for 3.9A loads without derating.	Prefer for battery-powered sensor nodes where leakage and gate drive strength are prioritized over conduction loss.

Compared with DMN3025LSD-13 and SI2303DS-T1-E3, IRLL2703 uniquely balances 3.9A current capacity, 0.045Ω on-resistance at 10V, and SOT-223 thermal performance - making it optimal for mid-power industrial DC-DC and motor control where both efficiency and reliability are required.

Availability

IRLL2703 is available at Aetrix Electronics and suitable for DC-DC buck converters, low-voltage motor drivers, LED constant-current sinks, and USB-C PD load switches requiring stable component supply across production lifecycles.

Supply support for IRLL2703 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 semiconductor innovation, specializing in high-efficiency MOSFETs, IGBTs, and driver ICs for industrial, automotive, and computing applications.

The HEXFET® product line was engineered for high-current, high-reliability power switching - emphasizing low R_DS(on), fast switching, and rugged avalanche capability in compact surface-mount packages.

FAQ

Is IRLL2703 suitable for 3.3V logic-level gate drive?

No - IRLL2703 has a gate threshold voltage range of 1.0–2.4V, but its R_DS(on) is specified at 0.060Ω only at V_GS = 5.0V and 0.070Ω at V_GS = 4.0V. For full enhancement and low conduction loss, ≥4.5V gate drive is recommended; 3.3V may result in excessive heating above 1A.

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

Per datasheet, IRLL2703 supports 3.1A continuous drain current at T_A = 70°C with V_GS = 10V. This assumes minimum recommended SOT-223 footprint on FR-4; exceeding this requires thermal derating per the 8.3mW/°C linear factor or improved copper area.

Does IRLL2703 have integrated ESD protection?

No - IRLL2703 lacks on-chip ESD protection diodes. Gate oxide is susceptible to damage from static discharge; proper handling (grounded wrist strap, conductive foam) and layout practices (series gate resistor, local TVS) are mandatory during assembly and operation.

Can IRLL2703 replace IRFL014 in existing designs?

Yes - IRLL2703 and IRFL014 share identical SOT-223 pinout, 30V V_DSS, and comparable R_DS(on) (0.045Ω vs. 0.050Ω). IRLL2703 offers slightly better thermal resistance and is lead-free; no layout changes are needed, but verify gate drive strength and transient stress margins.

IRLL2703 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

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

Packaging:: Tube

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

IRLL2703 FAQ

1.How can I place an order for IRLL2703 through Aetrix?

Please submit a Request for Quotation (RFQ) for IRLL2703 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 IRLL2703 reliable?

The price and inventory of IRLL2703 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRLL2703 is usually 5 days.

3.What payment methods are accepted for IRLL2703?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRLL2703 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRLL2703?

IRLL2703 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRLL2703 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 IRLL2703?

For technical support, including IRLL2703 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRLL2703 requirements.

6.How does Aetrix verify that IRLL2703 is sourced from the original manufacturer or authorized distributors?

All IRLL2703 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 IRLL2703 meets industry standards.

7.What is the process for return or replacement of IRLL2703?

All IRLL2703 units undergo pre-shipment inspection (PSI). If there is an issue with IRLL2703, 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 IRLL2703 part is unused and in its original packaging.

Return procedure for IRLL2703:

1.Submit a request within 90 days.

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

Tech Hub

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…

2026-07-17 Raspberry Pi Alternatives: Chip-Level Comparison, Compatibility and Replacement Guide

Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…

2026-07-13 How to Test Dynamic Load Response in Low-Voltage High-Current Buck Converters

Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…

2026-07-08 Output Capacitor Selection for High-Current ASIC Vcore Rails

Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…

2026-07-07 High-Current ASIC Core Power Supply Design: 12-Phase Buck, PMBus and Dynamic Load Response

Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …

2026-07-06 Voltage Regulator: Types, Circuits, Testing and Selection Guide

Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.

2026-06-30 Amplifiers Explained: Types, Circuits, Gain, Classes and Applications

Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…