Infineon Technologies AUIRF7304Q

Overview

AUIRF7304Q from Infineon is a dual P-channel automotive-grade HEXFET® Power MOSFET in SO-8 package, rated for -20V V_DS, 0.090Ω R_DS(on) at -4.5V V_GS, and -4.3A continuous drain current. It delivers fast switching (t_r = 26ns, t_f = 33ns), operates up to +150°C junction temperature, and features logic-level gate drive compatibility. It is used in automotive load switching, such as body control modules and LED lighting drivers.

For engineers reviewing the AUIRF7304Q datasheet, AUIRF7304Q pinout, AUIRF7304Q application, or AUIRF7304Q equivalent, key selection criteria include its dual P-channel configuration, -20V breakdown voltage, low on-resistance at logic-level gate drive, thermal robustness to 150°C, and automotive qualification per AEC-Q101.

Technical Context

This dual P-channel MOSFET integrates two matched high-efficiency HEXFET cells in a single SO-8 package, enabling compact half-bridge or dual independent load switch topologies. Its planar process ensures stable R_DS(on) over temperature (±0.012 V/°C dV(BR)_DSS/dT_J) and rugged dv/dt immunity (-5.0 V/ns).

The device supports logic-level operation down to -2.7V V_GS (R_DS(on) ≤ 0.140Ω), includes an integral body diode with t_rr = 56–84 ns and Q_rr = 71–110 nC, and exhibits low gate charge (Q_g = 22 nC) for efficient PWM-driven applications in 12V automotive systems.

Key Specifications

Pinout & Package

Package: SO-8 (JEDEC MS-012AA), surface-mount, lead-free and RoHS compliant. Thermal resistance R_θJA = 62.5 °C/W on 1-inch² copper board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SPB04N60C3 and IPB80P04P4L-04, the AUIRF7304Q uniquely balances SO-8 footprint, logic-level drive, -20V rating, and AEC-Q101 compliance - making it optimal for space-constrained 12V automotive load switches where dual independent control and thermal resilience are critical.

Availability

AUIRF7304Q is available at Aetrix Electronics and suitable for automotive body control modules, LED lighting drivers, engine auxiliary load switching, and HVAC blower control requiring stable component supply across production lifecycles.

Supply support for AUIRF7304Q 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 solutions, with global manufacturing and quality certification infrastructure.

The AUIRF7304Q belongs to Infineon's automotive-qualified HEXFET® Power MOSFET product line, engineered specifically for high-reliability 12V vehicle subsystems demanding logic-compatible drive, thermal resilience, and noise immunity.

FAQ

Is AUIRF7304Q pin-compatible with standard SO-8 dual MOSFETs like SI4946DY?

No. AUIRF7304Q uses a shared-source pinout (pins 1–4 = S1/S2), whereas SI4946DY has independent source pins. Direct substitution would cause short-circuit between channels. Layout and schematic must be verified against the AUIRF7304Q top-view diagram showing G1/D1/S1 and G2/D2/S2 connections.

Can AUIRF7304Q be used in a synchronous buck converter as high-side switch?

No. As a P-channel device, it lacks the low R_DS(on) and gate drive efficiency required for high-frequency synchronous rectification. Its 22 nC Q_g and 33 ns t_f are optimized for <200 kHz load switching-not MHz-range power conversion. Use dedicated synchronous buck controllers with N-channel high-side drivers instead.

What is the maximum safe continuous current at 85°C ambient temperature?

At T_A = 85°C, derated current is approximately -2.4A, calculated using R_θJA = 62.5 °C/W and T_J(max) = 150°C: ΔT = 65°C → P_D = 65 / 62.5 = 1.04 W → I = √(P / R_DS(on)) = √(1.04 / 0.090) ≈ 3.4A. However, datasheet specifies -3.4A at T_A = 70°C; linear interpolation yields ~-2.4A at 85°C with margin.

Does AUIRF7304Q require external gate resistors for automotive EMI compliance?

Yes. While not mandatory for basic operation, a 10–22Ω series gate resistor is recommended to dampen ringing caused by PCB trace inductance and MOSFET input capacitance (C_iss = 610 pF), especially in high-di/dt automotive environments. This improves EMC performance and reduces radiated emissions per CISPR 25 Class 5 requirements.