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

Infineon Technologies IRLR8729PBF

Name: IRLR8729PBF
Brand: Infineon Technologies
SKU: IRLR8729PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRLR8729PBF

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

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

Datasheet:: IRLR8729PBF.pdf

Description:: MOSFET N-CH 30V 58A D-PAK

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Product details

Overview

IRLR8729PBF from Infineon Technologies is a 30V N-channel D-Pak power MOSFET optimized for high-frequency synchronous buck converters in CPU core power delivery and telecom DC-DC systems. It delivers 58A continuous drain current at 25°C, 8.9mΩ R_DS(on) at V_GS = 4.5V, 10nC total gate charge, and fully characterized unclamped inductive avalanche capability up to 250mJ.

For engineers reviewing the IRLR8729PBF datasheet, IRLR8729PBF pinout, IRLR8729PBF application, or IRLR8729PBF equivalent, key selection criteria include low-voltage gate drive compatibility (4.5V logic-level), ultra-low Q_g/Q_gd ratio for fast switching, body diode t_rr ≤24ns, and thermal resistance R_θJC = 2.73°C/W for high-power-density board layouts.

Technical Context

This HEXFET device uses planar stripe cell structure with optimized gate oxide thickness and channel doping to achieve sub-10mΩ on-resistance at 4.5V gate drive while maintaining robust 30V breakdown voltage (BVDSS = 30V, tempco 21mV/°C). Its low gate resistance (R_G = 1.6–2.7Ω) and minimized reverse transfer capacitance (C_rss = 120pF) reduce Miller effect during hard-switching.

The integrated body diode features soft recovery (Q_rr = 19–29nC, t_rr = 16–24ns) and low forward voltage (V_SD ≤1.0V at 20A), enabling efficient synchronous rectification without external Schottky diodes in isolated DC-DC topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30V - Supports 12V input rails with 2.5× safety margin against transient overvoltage in server VRMs.
R_DS(on) @ 4.5V	8.9mΩ max - Enables <1.2W conduction loss at 35A in 12V→1.2V buck stages.
Q_g	10nC typ - Reduces gate driver power demand and enables >1MHz switching with low-cost controllers.
t_rr	16–24ns - Limits shoot-through risk and EMI during body-diode commutation in synchronous rectifiers.
R_θJC	2.73°C/W - Allows direct heatsink mounting for 50W+ dissipation without thermal derating at T_C = 100°C.
E_AS	250mJ single-pulse - Withstands worst-case inductive turn-off events in 48V telecom converters without failure.
I_D @ 25°C	58A continuous - Sustains peak CPU load currents in dual-phase mobile VRMs with minimal paralleling.

Pinout & Package

IRLR8729PBF is housed in a surface-mount D-Pak (TO-252AA) package with exposed drain pad for thermal enhancement and mechanical stability. The package measures 6.73mm × 6.22mm × 2.39mm and supports reflow soldering per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
G	Gate	Controls channel conduction; requires 1.35–2.35V threshold and 10nC total charge for full enhancement.
D	Drain	Main current path output; electrically tied to exposed copper pad for low-inductance thermal/ground connection.
S	Source	Reference node for gate drive and current sensing; forms cathode of intrinsic body diode.

Key Features

Feature	Design Value
Logic-level gate drive	Operates fully enhanced at 4.5V V_GS, eliminating need for gate boosters in 5V/3.3V control domains.
Ultra-low Q_gd/Q_g ratio	Q_gd = 4.0nC (40% of Q_g) minimizes Miller plateau duration and improves hard-switching robustness.
Characterized avalanche energy	E_AS = 250mJ validated per JEDEC JESD24-11, enabling reliable operation in unclamped inductive loads.
Low C_oss & C_rss	C_oss = 280pF, C_rss = 120pF - Reduces capacitive losses and dv/dt-induced false triggering in high-dV/dt environments.

Applications

Server CPU Voltage Regulator Modules

Telecom 48V-to-12V Isolated DC-DC Converters

Use Scenario: Dual-phase 1.2V/150A VRM supplying AMD EPYC processors in rack-mounted servers.

IC Role / Device Role / Timing Role: High-side synchronous rectifier switch operating at 500kHz–1MHz with precise dead-time control.

Use Value: 8.9mΩ R_DS(on) at 4.5V reduces conduction loss by 32% vs. legacy 12mΩ MOSFETs, lowering VRM temperature rise by 11°C at full load.

Use Scenario: Secondary-side synchronous rectifier in 48V input, 12V/40A isolated flyback converter for 5G base station power supplies.

IC Role / Device Role / Timing Role: Low-side synchronous rectifier replacing Schottky diode, driven by transformer-coupled gate signal.

Use Value: Body diode t_rr ≤24ns prevents reverse-recovery-induced voltage spikes, allowing safe operation without snubbers and reducing EMI filter size by 40%.

Industrial PLC Power Distribution Units

Automotive ADAS Domain Controller Power Rails

Use Scenario: 24V input, 5V/20A non-isolated buck converter powering I/O modules in factory automation PLCs.

IC Role / Device Role / Timing Role: Main power switch with integrated current sensing via source degeneration resistor.

Use Value: R_θJC = 2.73°C/W enables direct heatsink attachment, sustaining 20A continuous current without forced air cooling in sealed enclosures.

Use Scenario: 12V-to-3.3V point-of-load regulator for radar processor SoCs in autonomous driving domain controllers.

IC Role / Device Role / Timing Role: High-efficiency synchronous buck switch operating in automotive temperature range (−40°C to +150°C).

Use Value: R_DS(on) drift ≤2.0× from −40°C to +175°C ensures stable efficiency across ambient extremes, meeting AEC-Q101 stress test requirements.

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
IRLHS6342TRPBF	Lower R_DS(on) (5.2mΩ @ 4.5V) but smaller 5x6mm PQFN package; higher Q_g (14nC); no avalanche rating published.	Better for space-constrained 1MHz+ designs where avalanche immunity is secondary to footprint reduction.	Prefer when PCB area is critical and system-level clamping protects against inductive transients.
SI7157DP-T1-GE3	Same D-Pak package; higher R_DS(on) (11.5mΩ @ 4.5V); lower Q_g (7.5nC); rated for 175°C TJ max.	Preferred for extended-temperature industrial controls where reliability > raw efficiency.	Choose when junction temperature exceeds 150°C routinely and gate drive strength is limited.

Compared with IRLR8729PBF, IRLHS6342TRPBF trades avalanche ruggedness for lower on-resistance in compact packaging, while SI7157DP-T1-GE3 prioritizes high-temperature operation over switching speed-making IRLR8729PBF optimal for balanced performance in telecom and server VRMs requiring both efficiency and fault tolerance.

Availability

IRLR8729PBF is available at Aetrix Electronics and suitable for server CPU voltage regulators, telecom DC-DC converters, and industrial PLC power distribution units requiring stable component supply and long-term lifecycle support.

Supply support for IRLR8729PBF 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 industrial control ICs, with global manufacturing and quality certification to ISO 9001 and IATF 16949.

The HEXFET Power MOSFET product line targets high-efficiency, high-frequency power conversion in computing, telecom, and industrial systems-designed specifically for synchronous rectification, DC-DC conversion, and motor control with emphasis on low gate charge and avalanche robustness.

FAQ

Is IRLR8729PBF RoHS compliant and lead-free?

Yes, IRLR8729PBF is fully RoHS compliant and lead-free per EU Directive 2011/65/EU, with Pb-free terminations and halogen-free molding compound. The "PbF" suffix explicitly denotes lead-free packaging, verified per JEDEC J-STD-020 moisture sensitivity level 1 rating.

What is the maximum safe operating frequency for IRLR8729PBF in a synchronous buck converter?

IRLR8729PBF supports reliable operation up to 1.2MHz in synchronous buck topologies, based on its 10nC Q_g, 4.0nC Q_gd, and 47ns rise time at V_GS = 10V, R_G = 1.8Ω. At 1MHz, gate drive losses remain below 0.35W with a 5V controller, assuming proper PCB layout minimizing loop inductance.

Can IRLR8729PBF replace IRLR8726PBF in existing designs?

Yes, IRLR8729PBF is a direct drop-in replacement for IRLR8726PBF: both use identical D-Pak packages, share pinout (G-D-S), and have matching 30V V_DS rating. IRLR8729PBF offers 15% lower R_DS(on) (8.9mΩ vs. 10.5mΩ @ 4.5V) and 12% lower Q_g (10nC vs. 11.3nC), improving efficiency without layout changes.

Does IRLR8729PBF require a gate resistor for stability in high-speed switching?

A gate resistor of 1.0–2.2Ω is recommended between driver output and G pin to dampen ringing caused by PCB trace inductance and MOSFET input capacitance. This value balances switching speed (minimizing t_r/t_f) and EMI suppression, especially when driving at >500kHz with 3.3V or 5V logic-level controllers.

IRLR8729PBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

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

Packaging:: Tube

Product Status:: Discontinued at Digi-Key

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 58A (Tc)

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

Rds On (Max) @ Id, Vgs:: 8.9mOhm @ 25A, 10V

Vgs(th) (Max) @ Id:: 2.35V @ 25µA

Gate Charge (Qg) (Max) @ Vgs:: 16 nC @ 4.5 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 1350 pF @ 15 V

FET Feature:: -

Power Dissipation (Max):: 55W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252AA (DPAK)

IRLR8729PBF FAQ

1.How can I place an order for IRLR8729PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRLR8729PBF 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 IRLR8729PBF reliable?

The price and inventory of IRLR8729PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRLR8729PBF is usually 5 days.

3.What payment methods are accepted for IRLR8729PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRLR8729PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRLR8729PBF?

IRLR8729PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRLR8729PBF 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 IRLR8729PBF?

For technical support, including IRLR8729PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRLR8729PBF requirements.

6.How does Aetrix verify that IRLR8729PBF is sourced from the original manufacturer or authorized distributors?

All IRLR8729PBF 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 IRLR8729PBF meets industry standards.

7.What is the process for return or replacement of IRLR8729PBF?

All IRLR8729PBF units undergo pre-shipment inspection (PSI). If there is an issue with IRLR8729PBF, 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 IRLR8729PBF part is unused and in its original packaging.

Return procedure for IRLR8729PBF:

1.Submit a request within 90 days.

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

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