Infineon Technologies IRF7322D1PBF

Overview

IRF7322D1PBF from Infineon Technologies (formerly International Rectifier) is a co-packaged P-channel HEXFET® Power MOSFET and low-forward-voltage Schottky diode in a single SO-8 package. It delivers R_DS(on) = 49 mΩ @ V_GS = −4.5 V, Schottky V_F = 0.39 V @ I_F = 1.0 A, TJ = 125°C, and supports −5.3 A continuous drain current at 25°C - optimized for synchronous buck converter high-side switching and body-diode-assisted freewheeling.

For engineers reviewing the IRF7322D1PBF datasheet, IRF7322D1PBF pinout, IRF7322D1PBF application, or IRF7322D1PBF equivalent, key selection criteria include verified co-package thermal coupling between MOSFET and Schottky, SO-8 footprint compatibility with Generation 5 HEXFET layout rules, and validated dv/dt immunity of −5.0 V/ns during diode recovery.

Technical Context

This FETKY device integrates a logic-level P-channel MOSFET and a low-V_F Schottky rectifier on a thermally enhanced SO-8 leadframe. The MOSFET features gate threshold voltage V_GS(th) = −0.70 V (min), g_fs = 5.9 S, and Q_g = 19 nC (typ), enabling fast turn-on with low drive loss. The Schottky exhibits I_RM = 8 μA reverse leakage @ 20 V, 125°C, and trr = 47 ns (typ) - critical for minimizing switching node ringing in high-frequency DC/DC converters.

The co-packaged architecture eliminates PCB trace inductance between switch and freewheeling path, reducing voltage overshoot during diode recovery. Thermal resistance R_θJA = 62.5°C/W (FR-4, 10 sec) and linear derating factor of 16 mW/°C support stable operation up to T_J = 150°C in compact power stages.

Key Specifications

Pinout & Package

IRF7322D1PBF uses a modified SO-8 package with enhanced thermal performance via customized leadframe geometry. It conforms to JEDEC MS-012AA outline and supports vapor phase, infrared, and wave soldering.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar P-channel FETKY applications.

Compared with Si7842DP-T1-GE3, IRF7322D1PBF offers lower V_F and Q_g, reducing light-load losses and gate drive burden; versus DMN3020LSD-13, it trades 21 mΩ lower R_DS(on) for guaranteed co-package timing alignment and reduced EMI risk.

Availability

IRF7322D1PBF is available at Aetrix Electronics and suitable for smartphone PMICs, USB-C PD sink regulators, wireless headset charging circuits, and portable SSD power management requiring stable component supply and full lifecycle support.

Supply support for IRF7322D1PBF 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 specializing in power management, automotive, and industrial control solutions, with deep expertise in silicon-based power devices and system-level integration.

The FETKY product line was developed to replace discrete MOSFET + diode combinations in space- and efficiency-critical DC/DC converters, targeting portable electronics, wearables, and ultra-thin computing platforms.

FAQ

What is the maximum recommended gate drive voltage for IRF7322D1PBF?

The absolute maximum V_GS rating is ±12 V. For reliable long-term operation, gate drive should be limited to −4.5 V to −8 V for full enhancement while avoiding oxide stress. Driving below −2.7 V results in significant R_DS(on) increase (>82 mΩ), degrading efficiency at higher currents.

Can IRF7322D1PBF be used in synchronous rectification mode?

No - IRF7322D1PBF is a P-channel high-side switch with integrated Schottky; its body diode is not designed for synchronous rectification. The Schottky serves only as a freewheeling path during MOSFET off-time. True synchronous rectification requires an N-channel low-side switch controlled by a dedicated driver.

Is the Schottky diode electrically isolated from the MOSFET substrate?

No - the Schottky anode is internally connected to the MOSFET drain, and the cathode to the MOSFET source. This monolithic co-packaging ensures fixed voltage relationship and eliminates parasitic inductance, but prevents independent biasing of either device.

Does IRF7322D1PBF require a heatsink in typical 2 A applications?

Not typically - with R_θJA = 62.5°C/W and 120 mW conduction loss at 2.9 A, junction temperature rise is ~7.5°C above ambient on standard FR-4. Heatsinking is unnecessary unless ambient exceeds 120°C or continuous current exceeds 4 A with >50% duty cycle.