Renesas ISL89411IBZ

Overview

ISL89411IBZ from Intersil is a high-speed dual-channel inverting MOSFET driver IC delivering 2.0A peak source/sink current per channel, operating from 4.5V to 18V supply, with matched 18–25ns turn-on/turn-off delays and <20ns rise/fall times into 1000pF loads. It drives power MOSFETs in Class D amplifiers and switch-mode power supplies where timing integrity and low clock skew are critical.

For engineers reviewing the ISL89411IBZ datasheet, ISL89411IBZ pinout, ISL89411IBZ application, or ISL89411IBZ equivalent, this page delivers verified specifications, SOIC-8 package details, inverting output behavior, Turbo-Driver architecture benefits, and real-world selection guidance for high-frequency gate drive circuits.

Technical Context

The ISL89411IBZ implements a proprietary "Turbo-Driver" input stage that taps output voltage swing to accelerate input response, enabling sub-25ns propagation delays while maintaining CMOS-level supply current (1–2.5mA). Its internal architecture includes hysteresis-enabled input buffers, dual-stage inverting logic paths, and non-overlapped drive control to prevent shoot-through.

Each channel features matched rise/fall delay times (tD1/tD2 ≤ 25ns) and tightly controlled output impedance (ROH = 3–6Ω, ROL = 4–6Ω), preserving pulse-width fidelity across temperature and supply voltage (4.5–18V). The device operates over –40°C to +85°C ambient with 125°C junction limit and supports Pb-free reflow per J-STD-020.

Key Specifications

Pinout & Package

ISL89411IBZ is housed in an 8-lead narrow-body SOIC package (M8.15E), RoHS-compliant, with 1.27mm lead pitch and JEDEC MS-012 footprint compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM5112MMX/NOPB and TC4427ACOA, the ISL89411IBZ uniquely delivers inverting outputs with matched sub-25ns delays and ultra-low 1–2.5mA supply current - making it optimal for high-frequency, low-skew, low-power dual-gate drive where integrated inversion and timing fidelity are mandatory.

Availability

ISL89411IBZ is available at Aetrix Electronics and suitable for Class D audio amplifiers, switch-mode power supplies, ultrasonic transducer drivers, and pulsed RF generators requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ISL89411IBZ 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

Intersil Corporation is a precision analog and power management semiconductor company, now part of Renesas Electronics, specializing in high-performance drivers, regulators, and interface ICs for industrial, computing, and consumer systems.

The ISL89411IBZ belongs to Intersil's high-speed MOSFET driver product line, engineered specifically for timing-critical gate drive applications demanding low skew, high peak current, and robust noise immunity in compact SOIC packages.

FAQ

What is the output configuration of the ISL89411IBZ?

The ISL89411IBZ provides dual inverting outputs: OUTA is the inverted version of INA, and OUTB is the inverted version of INB. This eliminates the need for external inverters in half-bridge or complementary-switching configurations. Unlike the ISL89410 (non-inverting) or ISL89412 (complementary), the ISL89411IBZ is specifically designed for inverting-only dual-channel drive, confirmed in the Pin Descriptions section of FN6798 Rev 2.00.

Does the ISL89411IBZ support 3.3V logic inputs?

Yes, the ISL89411IBZ accepts 0V to V+ logic inputs, with VIH = 2.4V minimum and VIL = 0.8V maximum at 25°C. At 3.3V logic levels, it meets all input threshold requirements and exhibits 0.3V hysteresis for noise rejection. The datasheet explicitly recommends ≥3.3V input drive for reliable operation at 15–18V V+, confirming full compatibility with standard 3.3V microcontrollers and PWM controllers.

What is the maximum capacitive load the ISL89411IBZ can drive reliably?

The ISL89411IBZ is characterized up to 1000pF load with specified rise/fall times (10–20ns) and propagation delays (18–25ns). While it can drive larger loads, performance degrades: tR/tF increase linearly with CL, and excessive capacitance (>2nF) at high frequency may cause thermal overload due to gate charge power loss (P = Qc × Vgs × fSW). For >1nF loads, external gate resistors or reduced switching frequency are recommended per Application Guidelines on page 8 of FN6798.

Is the ISL89411IBZ pin-compatible with other devices in the ISL8941x family?

No - although ISL89411IBZ shares the same SOIC-8 (M8.15E) package and pinout with ISL89410IBZ and ISL89412IBZ, its functional behavior differs: ISL89411IBZ has inverting outputs on both channels, whereas ISL89410IBZ is non-inverting and ISL89412IBZ provides complementary (one inverting, one non-inverting) outputs. Swapping them without circuit redesign will invert signal polarity and disrupt timing, so they are not functionally interchangeable despite identical pinouts.

What thermal derating applies to the ISL89411IBZ in SOIC-8 package?

In the 8-lead SOIC package (M8.15E), the ISL89411IBZ has a maximum power dissipation of 570mW at +25°C ambient. Derating is linear at 5.7mW/°C above +25°C, reaching 0mW at +125°C case temperature. This corresponds to a θJA of ~175°C/W. To sustain full 2A peak output at high duty cycles or elevated ambient, PCB copper area, thermal vias under the exposed pad (if present), and airflow must be optimized per Figure 1 (Max Power/Derating Curves) in FN6798.