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

Infineon Technologies AUIRLL2705

Name: AUIRLL2705
Brand: Infineon Technologies
SKU: AUIRLL2705
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AUIRLL2705

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

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

Datasheet:: AUIRLL2705.pdf

Description:: MOSFET N-CH 55V 5.2A SOT223

Quantity:: RFQ Add To RFQ list

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Inventory:8,607

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Product details

Overview

AUIRLL2705 from Infineon is an automotive-qualified N-channel HEXFET® Power MOSFET in SOT-223 package, rated for 55 V V_DS, 3.8 A continuous drain current at 25°C with 10 V gate drive, and 0.04 Ω max R_DS(on) at V_GS = 10 V. It delivers logic-level gate drive compatibility, 150°C junction operation, and full avalanche rating-enabling robust high-side/low-side switching in automotive body control modules, LED headlamp drivers, and DC motor control circuits.

For engineers reviewing the AUIRLL2705 datasheet, AUIRLL2705 pinout, AUIRLL2705 application, or AUIRLL2705 equivalent, this page provides verified electrical parameters, thermal derating data, diode recovery characteristics, and validated automotive-grade qualification evidence per AEC-Q101 standards-not generic MOSFET generalities.

Technical Context

This device employs advanced planar silicon processing to achieve low on-resistance per die area while maintaining rugged unclamped inductive switching capability. Its dynamic dv/dt rating of 7.5 V/ns and 110 mJ single-pulse avalanche energy (V_DD = 25 V, I_AS = 3.8 A) support reliable operation in noisy automotive environments with fast load transients.

The MOSFET features a fully characterized body diode with 58–88 ns reverse recovery time and 140–210 nC Q_rr at 100 A/µs di/dt, enabling efficient synchronous rectification and freewheeling in buck converters and H-bridge motor drivers without external Schottky supplementation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	55 V - Maximum blocking voltage compatible with 42 V automotive systems and transient overvoltage tolerance up to ISO 7637-2 Pulse 5a.
R_DS(on) max	0.040 Ω @ V_GS = 10 V, I_D = 3.8 A - Enables <150 mW conduction loss at rated current, reducing thermal footprint on FR-4 PCBs.
I_D cont	3.8 A @ T_A = 25°C, V_GS = 10 V - Sustains continuous load current typical of automotive solenoid drivers and fan controllers.
Q_g	32–48 nC - Low gate charge supports efficient 100 kHz+ PWM switching with standard logic-level drivers (e.g., TC4427).
E_AS	110 mJ - Thermally limited single-pulse avalanche energy ensures survival during inductive turn-off faults in relay/motor loads.
T_J max	+150°C - Rated junction temperature enables deployment in under-hood ECUs without active cooling.

Pinout & Package

SOT-223 (TO-261AA) package with exposed drain pad for thermal enhancement; 3-pin configuration optimized for surface-mount assembly and manual rework. Pin 1 = Gate, Pin 2 = Drain (tab), Pin 3 = Source.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (G)	Gate	Logic-level input requiring ≤2.0 V threshold; accepts direct MCU GPIO drive without level-shifting.
Pin 2 (D)	Drain	Exposed metal tab electrically connected to drain; must be soldered to copper pour for thermal dissipation and EMI shielding.
Pin 3 (S)	Source	Reference node for gate drive and current sensing; tied to ground or low-side shunt resistor in high-efficiency topologies.

Key Features

Feature	Design Value
Automotive qualification	AEC-Q101 qualified with full traceability-meets vibration, temperature cycling, and humidity testing for under-hood use.
Logic-level gate drive	V_GS(th) = 1.0–2.0 V enables direct interface with 3.3 V/5 V microcontrollers without gate driver ICs.
Repetitive avalanche rating	0.10 mJ EAR allows repeated inductive fault handling in safety-critical actuators without degradation.
Dynamic dv/dt immunity	7.5 V/ns rated diode recovery dv/dt prevents spurious turn-on during high-slew-rate commutation events.

Applications

Body Control Module (BCM)

LED Headlamp Driver

Use Scenario: Switching 12 V loads such as door locks, window lifts, and interior lighting via microcontroller outputs.

IC Role / Device Role / Timing Role: Low-side power switch controlling current path to grounded loads with precise PWM dimming capability.

Use Value: 0.04 Ω R_DS(on) minimizes resistive heating in space-constrained BCM PCBs, supporting >10-year field life at 85°C ambient.

Use Scenario: Constant-current regulation for high-brightness LED arrays in adaptive front-lighting systems (AFS).

IC Role / Device Role / Timing Role: High-side switch in buck-boost LED driver topology, managing 55 V transients during load dump.

Use Value: 55 V V_DS rating and 150°C T_J ensure uninterrupted operation during ISO 16750-2 load-dump pulses and engine bay thermal stress.

H-Bridge Motor Controller

Start-Stop System Solenoid Driver

Use Scenario: Bidirectional DC motor control for HVAC blower fans and seat adjusters using complementary half-bridge pairs.

IC Role / Device Role / Timing Role: Low-side switch in dual-MOSFET H-bridge with integrated body diode for freewheeling current recirculation.

Use Value: 58–88 ns t_rr and 140–210 nC Q_rr reduce switching losses and EMI during direction reversal at 20 kHz PWM.

Use Scenario: Driving 12 V starter solenoids in engine start-stop systems where rapid engagement/disengagement is required.

IC Role / Device Role / Timing Role: High-current pulse switch delivering 30 A peak (I_DM) for <300 µs solenoid actuation bursts.

Use Value: 30 A pulsed drain rating and 110 mJ E_AS prevent failure during repeated cold-cranking cycles with battery voltage sag.

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
STL220N4LF6AG	60 V V_DS, 0.035 Ω R_DS(on), DFN5x6 package - lower on-resistance but no SOT-223 footprint compatibility.	Higher power density; requires PCB redesign and thermal via layout changes.	Select when board space is constrained and thermal performance outweighs legacy footprint retention.
ON Semiconductor NTMFS4C09NT1G	40 V V_DS, 0.027 Ω R_DS(on), SO-8FL package - lower voltage rating limits use to 24 V systems only.	Not suitable for 42 V mild-hybrid architectures or load-dump tolerant designs.	Prefer for cost-sensitive 12 V/24 V non-automotive industrial controls where 55 V margin is unnecessary.

Compared with STL220N4LF6AG and NTMFS4C09NT1G, AUIRLL2705 uniquely balances 55 V rating, SOT-223 manufacturability, AEC-Q101 compliance, and 0.04 Ω on-resistance-making it optimal for drop-in replacement in existing automotive PCBs without layout revision or qualification retesting.

Availability

AUIRLL2705 is available at Aetrix Electronics and suitable for automotive body electronics, LED lighting systems, and motor control applications requiring stable component supply across extended vehicle lifecycles and production ramp phases.

Supply support for AUIRLL2705 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and security solutions, with global manufacturing and qualification infrastructure.

AUIRLL2705 belongs to Infineon's automotive-grade HEXFET® Power MOSFET product line, engineered specifically for reliability-critical 12 V/42 V vehicle subsystems including body control, lighting, and electrified chassis functions.

FAQ

Is AUIRLL2705 suitable for high-frequency PWM switching above 100 kHz?

Yes. With 32–48 nC total gate charge and 6.2 ns turn-on delay, AUIRLL2705 supports clean switching up to 200 kHz in buck converters and motor drives. Its 870 pF input capacitance and 92 pF reverse transfer capacitance minimize Miller effect-induced shoot-through risk when paired with matched gate resistors.

What is the maximum PCB-mount power dissipation at 70°C ambient?

At T_A = 70°C, the linear derating factor of 8.3 mW/°C reduces the 1.0 W maximum power dissipation (FR-4 board) by 375 mW, yielding 625 mW usable power. This supports 3.8 A continuous current only if R_DS(on) remains ≤0.043 Ω-verified at elevated temperature per Fig. 4.

Does AUIRLL2705 require external gate resistors for automotive EMI compliance?

Yes. A 6.2 Ω series gate resistor is specified in the datasheet for switching time characterization and helps damp ringing caused by parasitic inductance in harness-connected loads. Omitting it risks exceeding CISPR 25 Class 5 radiated emissions limits during fast edge transitions.

Can AUIRLL2705 replace IRLL2705 in existing designs?

Yes-AUIRLL2705 is the automotive-qualified version of IRLL2705 with identical pinout, R_DS(on), and V_DS, but adds AEC-Q101 qualification, enhanced temperature cycling endurance, and tighter parametric screening. No layout or firmware changes are needed for drop-in replacement in qualified automotive systems.

AUIRLL2705 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):: 55 V

Current - Continuous Drain (Id) @ 25°C:: 5.2A (Ta)

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

Rds On (Max) @ Id, Vgs:: 40mOhm @ 3.8A, 10V

Vgs(th) (Max) @ Id:: 2V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 48 nC @ 10 V

Vgs (Max):: ±16V

Input Capacitance (Ciss) (Max) @ Vds:: 870 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

AUIRLL2705 FAQ

1.How can I place an order for AUIRLL2705 through Aetrix?

Please submit a Request for Quotation (RFQ) for AUIRLL2705 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 AUIRLL2705 reliable?

The price and inventory of AUIRLL2705 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUIRLL2705 is usually 5 days.

3.What payment methods are accepted for AUIRLL2705?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUIRLL2705 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AUIRLL2705?

AUIRLL2705 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AUIRLL2705 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 AUIRLL2705?

For technical support, including AUIRLL2705 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUIRLL2705 requirements.

6.How does Aetrix verify that AUIRLL2705 is sourced from the original manufacturer or authorized distributors?

All AUIRLL2705 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 AUIRLL2705 meets industry standards.

7.What is the process for return or replacement of AUIRLL2705?

All AUIRLL2705 units undergo pre-shipment inspection (PSI). If there is an issue with AUIRLL2705, 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 AUIRLL2705 part is unused and in its original packaging.

Return procedure for AUIRLL2705:

1.Submit a request within 90 days.

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

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