Renesas ISL8225MEVAL2Z

Overview

ISL8225MEVAL2Z from Intersil is a 6-phase 90A evaluation board designed to validate the ISL8225M dual 15A/30A step-down power module in high-current, high-density POL applications. It supports parallel operation of up to six ISL8225M modules, delivers up to 100W per module, features differential remote sensing, 1.5% output voltage accuracy, and full protection (OVP/OCP/OTP). It is used for rapid prototyping of server VRs, telecom baseband power, and FPGA core supplies.

For engineers reviewing the ISL8225MEVAL2Z datasheet, ISL8225MEVAL2Z pinout, ISL8225MEVAL2Z application, or ISL8225MEVAL2Z equivalent, this board enables fast validation of multi-phase current sharing, phase interleaving, thermal performance under 90A load, and dynamic response with programmable output voltage (0.6V–7.5V) across 4.5V–20V input.

Technical Context

The ISL8225MEVAL2Z implements a complete 6-phase interleaved buck converter architecture using six ISL8225M modules, each operating at 500kHz (default) with optional synchronization via SYNC/CLKOUT pins. It supports master-slave current sharing via ISHARE bus and enables precise tracking or independent regulation through MODE, VSEN+, and EN/FF pins.

Board-level design includes Kelvin-sense routing for differential remote sensing, thermal vias under all PGND and phase pads, and layout-optimized input/output capacitor banks (including 5×100µF POSCAP + ceramic). It validates the ISL8225M's ability to sustain full 30A per module without heatsinks or forced air, leveraging its 0.9°C/W θJC and QFN thermal package.

Key Specifications

Availability

ISL8225MEVAL2Z is available at Aetrix Electronics and suitable for computing infrastructure, telecom baseband power, and industrial FPGA/ASIC power supply development requiring stable component supply, quick-turn evaluation, and multi-phase scalability.

Supply support for ISL8225MEVAL2Z 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 (now part of Renesas Electronics) is a semiconductor company specializing in high-performance analog and power management ICs for computing, communications, and industrial systems.

The ISL8225MEVAL2Z belongs to Intersil's high-density power module evaluation platform family, engineered to accelerate design-in of scalable, thermally robust, and protection-rich POL solutions for datacenter and 5G infrastructure.

FAQ

What is the primary function of the ISL8225MEVAL2Z evaluation board?

The ISL8225MEVAL2Z is a 6-phase 90A evaluation board purpose-built to demonstrate and validate the ISL8225M dual 15A/30A power module in real-world high-current POL applications. It provides complete reference circuitry-including input/output filtering, current sharing interconnects, thermal vias, and Kelvin-sense routing-to verify efficiency, transient response, thermal behavior, and protection functionality before custom PCB design. The board directly supports the ISL8225M's full feature set, including phase interleaving, remote sensing, and synchronization.

Does the ISL8225MEVAL2Z support single-module testing or only 6-module operation?

The ISL8225MEVAL2Z supports both configurations: it can operate with as few as one ISL8225M module installed (for dual 15A or single 30A validation) or scale up to six modules for full 90A interleaved operation. Jumper-selectable mode settings (MODE, SYNC, ISHARE) and individual EN/FF controls allow flexible configuration per AN1789. Each module site includes independent input capacitors, sense traces, and thermal pads-enabling isolated characterization or staged multi-phase integration.

How does the ISL8225MEVAL2Z implement current sharing among six ISL8225M modules?

The ISL8225MEVAL2Z implements automatic current sharing via the ISHARE bus, which connects all six ISL8225M modules' ISHARE pins together with recommended 470pF capacitors per node. This creates a shared analog voltage representing average channel current, enabling each module's internal current-sensing amplifier to adjust duty cycle dynamically. Per FN7822 datasheet and AN1789, this achieves ±10% current balance across all phases under steady-state and transient conditions, critical for thermal uniformity and reliability in high-power designs.

Can the ISL8225MEVAL2Z be used to evaluate dynamic load response for FPGA or ASIC core rails?

Yes-the ISL8225MEVAL2Z is explicitly validated for fast transient response required by FPGA and ASIC core supplies. With optimized 2×47µF ceramic + 1×330µF POSCAP output capacitance and interleaved 6-phase topology, it achieves ≤75mV peak deviation during 0A→7.5A load steps (2.5A/µs slew rate) at 1.5V output, as documented in Figures 8–13 of FN7822. The board's low-inductance layout and Kelvin-sense routing ensure accurate measurement of true load-point regulation, making it ideal for validating VR compliance in high-speed digital systems.

Is thermal performance data for the ISL8225MEVAL2Z publicly available?

Yes-thermal performance data for the ISL8225MEVAL2Z is published in AN1789 "ISL8225MEVAL2Z Evaluation Board User Guide" and supported by the ISL8225M 110A Thermal Performance Video referenced in the datasheet. Measured results confirm full 90A operation at 1.2V output with junction temperatures remaining below 125°C ambient (no heatsink or fan), leveraging the ISL8225M's 0.9°C/W θJC and the board's copper-filled thermal vias, exposed PGND planes, and optimized airflow path. Derating curves are provided in FN7822 Section 29.