Infineon Technologies IRF6706S2TR1PBF

Overview

IRF6706S2TR1PBF from Infineon Technologies (formerly International Rectifier) is a 25 V, 17 A N-channel Power MOSFET in DirectFET® S2 package, optimized as a control FET in 12 V input synchronous buck converters for CPU core power delivery. It delivers 3.0 mΩ R_DS(on) @ 10 V, 5.2 mΩ @ 4.5 V, 13 nC total gate charge, and ultra-low package inductance for high-frequency DC-DC switching up to 1 MHz.

For engineers reviewing the IRF6706S2TR1PBF datasheet, IRF6706S2TR1PBF pinout, IRF6706S2TR1PBF application, or IRF6706S2TR1PBF equivalent, key selection criteria include low R_DS(on) at 4.5 V gate drive, dual-sided cooling capability, <0.7 mm profile, and validated avalanche energy rating of 130 mJ at I_AS = 13 A.

Technical Context

This MOSFET employs HEXFET® silicon with trench-gate process and is packaged in the DirectFET® S2 outline - a top-side-drain, bottom-side-source copper clip design enabling dual-sided thermal interface. Its gate threshold voltage (1.35–2.35 V) and low Q_gd/Q_g ratio (4.4/13 nC) support fast, low-loss hard-switching in synchronous rectification topologies.

The device is characterized for operation up to T_J = 175 °C, with R_θJC = 5.7 °C/W and R_θJA = 12.5 °C/W on a 1-in² Cu board using dual-sided cooling. Its body diode exhibits t_rr = 17–26 ns and Q_rr = 21–32 nC under 250 A/µs di/dt, supporting efficient reverse recovery in high-dV/dt environments.

Key Specifications

Pinout & Package

IRF6706S2TR1PBF uses the DirectFET® S2 package: top-side drain (D), bottom-side source (S), and side-mounted gate (G). The package has no traditional leads; terminals are exposed copper pads compatible with standard SMT reflow. Height is <0.7 mm, footprint matches MICRO-8 layout.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar control-FET applications in high-frequency synchronous buck converters.

Compared with IRF6706S2TR1PBF, IRF6642TRPbF offers identical mechanical compatibility but sacrifices ~15% conduction efficiency at 4.5 V drive, while SiR626DP-T1-GE3 provides higher voltage headroom at the expense of thermal resistance and board area - making IRF6706S2TR1PBF optimal for space- and thermally constrained 12 V CPU VRMs.

Availability

IRF6706S2TR1PBF is available at Aetrix Electronics and suitable for server CPU core VRMs, laptop voltage regulator modules, and GPU power delivery systems requiring stable component supply, long-term lifecycle support, and traceable sourcing for high-reliability deployments.

Supply support for IRF6706S2TR1PBF 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 global semiconductor leader headquartered in Munich, Germany, specializing in power management, sensor solutions, and automotive microcontrollers with over 40 years of MOSFET innovation.

This part belongs to Infineon's DirectFET® product line - engineered specifically for high-efficiency, high-frequency DC-DC conversion in computing and communications infrastructure where thermal density and switching loss dominate system-level performance.

FAQ

Is IRF6706S2TR1PBF pin-compatible with other DirectFET® S2 MOSFETs?

Yes - all DirectFET® S2 devices share identical mechanical outline, terminal positions, and solder pad layout per AN-1035. The top drain, bottom source, and left-side gate terminals are standardized across the S2 family, enabling drop-in replacement within voltage and current rating limits.

What is the maximum recommended gate drive voltage for reliable operation?

The absolute maximum V_GS is ±20 V, but the device is fully characterized and qualified for continuous operation at 10 V. Driving above 12 V yields diminishing R_DS(on) returns and increases risk of gate oxide stress during voltage transients; 10 V is the design optimum for reliability and efficiency balance.

Can IRF6706S2TR1PBF be used in parallel configurations?

Yes - its positive R_DS(on) temperature coefficient (dR_DS(on)/dT ≈ +0.4 mΩ/°C) ensures inherent current sharing. Parallel operation requires matched gate drive impedance, symmetrical PCB layout, and thermal coupling; typical derating is 15% per additional device beyond two units.

Does this MOSFET require special PCB layout considerations for thermal performance?

Yes - to achieve rated R_θJC = 5.7 °C/W, the top drain pad must contact a heatsink or thermal plane with ≥10 mm² copper area and ≥2 thermal vias (0.3 mm diameter, filled) beneath the bottom source pad. AN-1035 specifies minimum solder mask opening and stencil thickness for optimal copper fill.