Infineon Technologies IRS4426STRPBF

Overview

IRS4426STRPBF from Infineon Technologies (formerly International Rectifier) is a dual low-side gate driver IC designed to drive N-channel MOSFETs and IGBTs in high-speed switching applications. It features matched 50 ns propagation delays per channel, ±2.3 A/±3.3 A peak output current capability, 6–20 V gate drive supply range, and CMOS/LSTTL-compatible Schmitt-trigger inputs. It is used in synchronous rectification stages of DC-DC converters.

For engineers reviewing the IRS4426STRPBF datasheet, IRS4426STRPBF pinout, IRS4426STRPBF application, or IRS4426STRPBF equivalent, key selection criteria include dual-channel timing matching, logic-level compatibility with 3.3 V/5 V controllers, SOIC-8 thermal performance (R_thJA = 200 °C/W), and industrial-grade latch-up immunity (JESD78 Class I).

Technical Context

The IRS4426STRPBF integrates two independent, non-inverting low-side drivers with proprietary latch-immune CMOS process technology. Each channel delivers 2.3 A source and 3.3 A sink peak current into capacitive loads up to 1000 pF, with identical turn-on/turn-off propagation delays (50 ns typ.) and rise/fall times (25–55 ns).

It operates from a single 6–20 V V_CC rail referenced to COM, accepts logic inputs across full V_CC range, and maintains output in-phase with input. Input hysteresis ensures noise immunity; output stage minimizes cross-conduction during switching transitions.

Key Specifications

Pinout & Package

IRS4426STRPBF is housed in an SOIC-8 narrow-body package (SOIC8N), surface-mount, RoHS-compliant, with standard 1.27 mm pitch and exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual low-side gate driver applications.

Compared with IRS2004PBF and LM5112MYX/NOPB, IRS4426STRPBF uniquely balances matched dual-channel timing, industrial latch-up immunity, and robust 3.3 A sink capability in a cost-optimized SOIC-8 footprint-making it optimal for mid-frequency DC-DC and motor control where timing precision and reliability are co-prioritized.

Availability

IRS4426STRPBF is available at Aetrix Electronics and suitable for DC-DC converters, motor control inverters, and telecom power modules requiring stable component supply, JEDEC-qualified reliability, and RoHS-compliant manufacturing.

Supply support for IRS4426STRPBF 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 acquired International Rectifier in 2015 and continues its legacy of high-performance power semiconductors and driver ICs.

The IRS44xx family was developed specifically for industrial and computing power conversion, emphasizing timing accuracy, latch-up resilience, and ease of integration in space-constrained, high-reliability designs.

FAQ

What is the maximum allowable V_CC voltage for continuous operation?

The absolute maximum V_CC rating is 25 V, but the recommended operating range is 6–20 V. Sustained operation above 20 V risks exceeding safe junction temperature under load due to increased quiescent current and reduced thermal headroom in SOIC-8 packaging.

Can IRS4426STRPBF drive both N-channel and P-channel MOSFETs?

IRS4426STRPBF is optimized for N-channel MOSFETs configured as low-side switches. It cannot directly drive P-channel high-side devices because its outputs are referenced to COM and lack high-side floating supply capability or level-shifting circuitry.

Is there internal dead-time control between the two output channels?

No. IRS4426STRPBF provides independent, in-phase outputs with no internal dead-time insertion. Dead-time must be implemented externally via controller logic or RC networks to prevent shoot-through in half-bridge configurations.

Does the NC pin (Pin 7) require any PCB layout consideration?

Pin 7 is internally unconnected and must remain electrically floating. It may be left un-routed or tied to COM only if required for mechanical stability-never connected to V_CC or signal nets, as this could induce parasitic coupling or violate SOIC-8 thermal design rules.