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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Gate Drivers

Infineon Technologies IRS4427SPBF

Name: IRS4427SPBF
Brand: Infineon Technologies
SKU: IRS4427SPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRS4427SPBF

Manufacturer:: Infineon Technologies

Category:: Gate Drivers

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: IRS4427SPBF.pdf

Description:: IC GATE DRVR LOW-SIDE 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:1,320

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Product details

Overview

IRS4427SPBF from Infineon Technologies (formerly International Rectifier) is a dual low-side gate driver IC designed to drive power MOSFETs and IGBTs in high-speed switching applications. It features 6–20 V gate drive supply, 2.3 A source / 3.3 A sink peak output current, matched 50 ns propagation delay per channel, and CMOS/LSTTL-compatible Schmitt-trigger inputs. Used in synchronous buck DC-DC converters for server VRMs.

For engineers reviewing the IRS4427SPBF datasheet, IRS4427SPBF pinout, IRS4427SPBF application, or IRS4427SPBF equivalent, key selection criteria include logic-level compatibility (3.3 V/5 V), dual-channel timing matching, SOIC-8 thermal performance (R_thJA = 200 °C/W), and latch-immune CMOS process robustness under industrial temperature range (–40 °C to +125 °C).

Technical Context

The IRS4427SPBF integrates two independent, non-inverting low-side drivers with matched propagation delays (t_on/t_off = 50 ns typ.) and separate input pins (INA, INB) referenced to COM. Its proprietary latch-immune CMOS process ensures immunity to transient-induced false triggering in noisy power systems.

Each output stage delivers asymmetric peak current (2.3 A source, 3.3 A sink) into capacitive loads up to 1000 pF, with rise/fall times of 25–55 ns. The device operates with fixed V_CC bias (6–20 V), requires no external bootstrap components, and supports direct connection to microcontroller GPIOs without level-shifting.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Supply Range	6 V to 20 V - enables direct use with common intermediate bus voltages (e.g., 12 V rail in telecom PSUs)
I_O+ / I_O−	2.3 A / 3.3 A - sufficient to rapidly charge/discharge 10 nC gate charge in <100 ns for 30–60 V MOSFETs
t_on / t_off	50 ns typ. - ensures precise dead-time control in synchronous rectification with minimal shoot-through risk
Input Logic Compatibility	3.3 V and 5 V CMOS/LSTTL - eliminates need for external level translators when interfacing with FPGAs or MCU I/O
R_thJA	200 °C/W - defines maximum power dissipation (0.625 W at T_A ≤ 25 °C) for SOIC-8 board-mount thermal design
Operating Temperature	–40 °C to +125 °C - validated for industrial ambient conditions per JEDEC Industrial qualification

Pinout & Package

IRS4427SPBF is housed in an 8-pin SOIC (SOIC-8N) package with standard 1.27 mm pitch, gull-wing leads, and RoHS-compliant matte tin plating. Thermal pad is not present; power dissipation relies on PCB copper area under exposed leadframe.

Pin/Terminal	Circuit Role	Design Meaning
1 (INA)	Channel A logic input	CMOS Schmitt-triggered; accepts 0–5 V signals; drives OUTA non-inverting
2 (INB)	Channel B logic input	CMOS Schmitt-triggered; independent of INA; drives OUTB non-inverting
3 (V_CC)	Gate drive supply	Provides power to both output stages; bypass capacitor required between V_CC and COM
4 (COM)	Ground reference	Common return for inputs, outputs, and V_CC; must be low-inductance connection to power ground plane
5 (OUTA)	Channel A output	Low-side driver output; sinks up to 3.3 A, sources up to 2.3 A; connects to MOSFET gate
6 (OUTB)	Channel B output	Low-side driver output; electrically isolated from OUTA; matched timing to OUTA
7 (NC)	No connect	Internally unconnected; must remain floating or tied to COM per layout guidelines
8 (V_CC)	Gate drive supply (duplicate)	Second V_CC pin for improved supply routing; electrically identical to Pin 3

Key Features

Feature	Design Value
Latch-immune CMOS process	Prevents unintended output state changes during ESD or dV/dt transients in high-noise motor drive or SMPS environments
Matched channel propagation delay	Ensures simultaneous turn-on/turn-off of parallel low-side switches, critical for current-sharing in multiphase VRMs
Asymmetric output drive strength	Higher sink current (3.3 A) accelerates MOSFET turn-off, reducing conduction loss during hard-switching transitions
Industrial qualification (JEDEC)	Validated for continuous operation at 125 °C junction temperature with MSL2 moisture sensitivity rating

Applications

Server Voltage Regulator Modules

Industrial Motor Drives

Use Scenario: Dual-phase synchronous buck converter supplying core voltage to Xeon processors.

IC Role / Device Role / Timing Role: Low-side driver for two parallel N-channel MOSFETs per phase; provides matched timing to minimize cross-conduction losses.

Use Value: 50 ns propagation delay matching reduces dead-time uncertainty to <10 ns, improving efficiency by ~0.8% at 1 MHz switching.

Use Scenario: Three-phase inverter stage in HVAC compressor drive using discrete IGBTs.

IC Role / Device Role / Timing Role: Dual low-side gate driver controlling bottom-leg IGBTs in two phases; driven by PWM signals from MCU timer outputs.

Use Value: 3.3 A sink current ensures sub-100 ns IGBT turn-off even with 200 nC gate charge, limiting tail current loss.

Telecom DC-DC Converters

LED Driver Power Stages

Use Scenario: Isolated forward converter secondary-side synchronous rectification with dual N-MOSFETs.

IC Role / Device Role / Timing Role: Dual low-side driver enabling zero-voltage switching (ZVS) by precisely timed gate control relative to transformer reset.

Use Value: 2.3 A source current charges 15 nC MOSFET gates within 7 ns, supporting >500 kHz operation with tight duty cycle control.

Use Scenario: Constant-current LED string driver using buck topology with high-side switch and low-side current sense.

IC Role / Device Role / Timing Role: Low-side driver for PWM-controlled shunt transistor regulating LED current via fast on/off cycling.

Use Value: Schmitt-trigger inputs reject noise from adjacent high-current traces, preventing false dimming commands in automotive cabin lighting.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IR2110PbF	High- and low-side driver with bootstrap diode; 10 V–20 V V_DD; 2 A output; no Schmitt input	Requires external bootstrap capacitor; suited for half-bridge topologies, not dual low-side only	Select when driving high-side + low-side in same package; avoid for pure dual low-side due to unnecessary complexity
LM5112MYX/NOPB	Single-channel, 5 A sink/source; 3.3 V/5 V compatible; 13 ns t_pd; SOIC-8	Single output; higher speed but no channel matching; no industrial temp grade	Choose for ultra-fast single-FET control where timing matching is irrelevant; not suitable for dual-channel synchronized switching

Compared with IR2110PbF and LM5112MYX/NOPB, IRS4427SPBF uniquely delivers matched dual-channel timing, industrial temperature rating, and Schmitt-trigger noise immunity in a dedicated low-side configuration-making it optimal for multi-phase VRMs and noise-sensitive industrial converters where channel synchronization and reliability are primary constraints.

Availability

IRS4427SPBF is available at Aetrix Electronics and suitable for server VRMs, industrial motor drives, telecom DC-DC converters, and LED driver power stages requiring stable component supply across extended product lifecycles.

Supply support for IRS4427SPBF 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 for industrial, automotive, and computing markets.

The IRS4427SPBF belongs to Infineon's legacy IR high-speed gate driver family, engineered specifically for reliable, low-jitter dual-channel control in high-frequency switched-mode power supplies and motor inverters.

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 V to 20 V. Sustained operation above 20 V risks exceeding internal oxide breakdown limits and degrading long-term reliability, especially at elevated temperatures. Designers should maintain V_CC ≤ 20 V with ≥10 % margin for ripple and transients.

Can IRS4427SPBF drive GaN HEMTs effectively?

Yes, IRS4427SPBF can drive enhancement-mode GaN HEMTs with gate thresholds below 2.5 V, provided V_CC is set to ≥12 V for adequate overdrive and the gate loop inductance is minimized. Its 25 ns rise time and 3.3 A sink capability support typical GaN gate charges of 3–8 nC, though dedicated GaN drivers offer tighter timing control.

Is Pin 7 (NC) safe to tie to ground in PCB layout?

No-Pin 7 is internally unconnected and must remain electrically floating. Tying it to ground introduces parasitic capacitance and may disturb internal substrate biasing. Per IR's layout guidelines, NC pins should be left unconnected or covered with solder mask; no trace or copper pour should contact this pad.

Does IRS4427SPBF include built-in undervoltage lockout (UVLO)?

No, IRS4427SPBF does not integrate UVLO circuitry. Operation ceases below V_CC = 6 V, but no hysteresis or shutdown flag is provided. System-level UVLO must be implemented externally-e.g., using a supervisor IC monitoring V_CC-to prevent erratic output behavior during brownout conditions.

IRS4427SPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Driven Configuration:: Low-Side

Channel Type:: Independent

Number of Drivers:: 2

Gate Type:: IGBT, N-Channel MOSFET

Voltage - Supply:: 6V ~ 20V

Logic Voltage - VIL, VIH:: 0.8V, 2.5V

Current - Peak Output (Source, Sink):: 2.3A, 3.3A

Input Type:: Non-Inverting

High Side Voltage - Max (Bootstrap):: -

Rise / Fall Time (Typ):: 25ns, 25ns

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

IRS4427SPBF FAQ

1.How can I place an order for IRS4427SPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRS4427SPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for IRS4427SPBF reliable?

The price and inventory of IRS4427SPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRS4427SPBF is usually 5 days.

3.What payment methods are accepted for IRS4427SPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRS4427SPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRS4427SPBF?

IRS4427SPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRS4427SPBF order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for IRS4427SPBF?

For technical support, including IRS4427SPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRS4427SPBF requirements.

6.How does Aetrix verify that IRS4427SPBF is sourced from the original manufacturer or authorized distributors?

All IRS4427SPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that IRS4427SPBF meets industry standards.

7.What is the process for return or replacement of IRS4427SPBF?

All IRS4427SPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRS4427SPBF, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The IRS4427SPBF part is unused and in its original packaging.

Return procedure for IRS4427SPBF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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