Infineon Technologies IRF7317PBF

Overview

IRF7317PBF from Infineon Technologies is a dual-channel logic-level MOSFET pair featuring an N-channel and P-channel device in a single SO-8 package, with R_DS(on) of 0.032 Ω (N-ch @ V_GS = 4.5 V) and 0.052 Ω (P-ch @ V_GS = –4.5 V), rated for ±20 V gate drive and 30 V drain-source voltage, commonly used in half-bridge motor control and synchronous buck converter high-side/low-side switching.

For engineers reviewing the IRF7317PBF datasheet, IRF7317PBF pinout, IRF7317PBF application, or IRF7317PBF equivalent, key selection criteria include verified dual-channel complementary conduction, SO-8 thermal performance (R_θJA = 50 °C/W), avalanche energy rating (E_AS = 30 mJ N-ch / 25 mJ P-ch), and gate charge values (Q_G = 12 nC N-ch / 10 nC P-ch) critical for PWM efficiency and thermal margin validation.

Technical Context

This dual MOSFET integrates independently controllable N-channel and P-channel silicon devices on one die, enabling complementary switching without external timing coordination. Its logic-level gate threshold (V_GS(th) = 1.0–2.0 V N-ch / –0.7 to –1.3 V P-ch) supports direct microcontroller drive at 3.3 V or 5 V.

The SO-8 package provides shared thermal path and low-inductance layout for high-frequency switching; each channel maintains separate source terminals (S1, S2) and dedicated gate pins (G1, G2), supporting independent gate drive and current sensing in bridge configurations.

Key Specifications

Pinout & Package

IRF7317PBF uses a standard SO-8 surface-mount package with exposed drain pad for enhanced thermal dissipation. Pin numbering follows JEDEC MS-012AC outline; top-view labeling confirms dual-channel isolation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel complementary MOSFET applications.

Compared with Si7852DP-T1-GE3 and DMC2038LSD-13, IRF7317PBF offers balanced conduction/switching trade-offs and superior avalanche ruggedness-making it optimal for industrial motor control where reliability under transient overload is mandatory.

Availability

IRF7317PBF is available at Aetrix Electronics and suitable for motor control half-bridges, synchronous buck converters, and USB-C power delivery systems requiring stable component supply across extended production lifecycles.

Supply support for IRF7317PBF 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 ICs, and industrial MOSFETs, with global manufacturing and quality certification to ISO/TS 16949 and AEC-Q101.

The OptiMOS™ family-including IRF7317PBF-is engineered for high-efficiency power conversion in space-constrained applications, emphasizing low R_DS(on), fast switching, and robust avalanche performance.

FAQ

What is the maximum continuous drain current for each channel at 100 °C case temperature?

At T_C = 100 °C, the N-channel supports 4.1 A and the P-channel supports –2.9 A, based on SO-8 package thermal limits and R_DS(on) temperature coefficient. Derating curves confirm these values maintain junction temperature below 150 °C with 1 W power dissipation per channel.

Can IRF7317PBF be used in a common-source configuration with shared gate drive?

No-IRF7317PBF requires independent gate control due to opposite polarity thresholds (N-ch: +1.0–2.0 V; P-ch: –0.7 to –1.3 V). Shared gate drive would forward-bias one channel while cutting off the other, causing shoot-through or latch-up. Separate gate signals referenced to respective sources are mandatory.

Does the SO-8 package include an exposed thermal pad, and is it electrically connected?

Yes-the SO-8 package features an exposed drain pad (pins 3 and 4 internally shorted) that is electrically connected to both drains. It must be soldered to a thermal land on the PCB for effective heat transfer; no internal isolation exists between D1 and D2 pads.

What is the recommended gate resistor value for 200 kHz PWM operation with 3.3 V MCU drive?

A 10 Ω series gate resistor is recommended to limit peak current (≤330 mA) and damp ringing, while maintaining <100 ns turn-on delay. This value balances switching speed against EMI and gate driver stress when driving Q_G = 10–12 nC from a 3.3 V GPIO with ≤20 mA sink/source capability.