Renesas ISL8225MEVAL3Z

Overview

ISL8225MEVAL3Z from Renesas Electronics is a 30A single-output evaluation board for the ISL8225M dual-phase DC/DC power module, configured with default 1.2V output, 4.5–20V input range, and 500kHz switching frequency. It enables rapid validation of high-current power delivery in FPGA, telecom, and datacom systems using paralleled-phase architecture.

For engineers reviewing the ISL8225MEVAL3Z datasheet, ISL8225MEVAL3Z pinout, ISL8225MEVAL3Z application, or ISL8225MEVAL3Z equivalent, this board provides verified thermal layout, efficiency curves at multiple VIN/VOUT points, and resistor-based VOUT adjustment guidance - critical for high-density power system prototyping and production readiness assessment.

Technical Context

The ISL8225MEVAL3Z implements the ISL8225M module in parallel-phase configuration to deliver 30A at 1.2V from 4.5–20V input, leveraging 180° phase shift to reduce input/output ripple and improve current sharing. Its 4-layer FR4 PCB features 2-ounce copper on outer layers and supports full-load operation at room temperature without forced airflow.

Board-level design includes dedicated test points (TP1–TP10), banana jack connectors (J1–J4), and configurable feedback resistors (R3/RVSET = 1kΩ default) for VOUT tuning between 0.6V and 7.5V. Thermal vias under the ISL8225MIRZ QFN26 package and solid power planes on Layers 1 and 4 ensure stable 30A conduction and efficient heat dissipation.

Key Specifications

Availability

ISL8225MEVAL3Z is available at Aetrix Electronics and suitable for FPGA power validation, telecom board bring-up, and high-current DC/DC reference design requiring stable component supply and documented thermal performance.

Supply support for ISL8225MEVAL3Z 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

Renesas Electronics Corporation is a global semiconductor leader delivering analog, power, and embedded processing solutions for industrial, automotive, and infrastructure applications.

The ISL8225MEVAL3Z belongs to Renesas' Industrial Analog and Power evaluation platform family, designed specifically to accelerate adoption of high-efficiency, high-current DC/DC modules in space-constrained, thermally demanding systems.

FAQ

What is the default output voltage of the ISL8225MEVAL3Z?

The ISL8225MEVAL3Z is manufactured with a default VOUT value of 1.2V, achieved using 1kΩ resistors (R3 and RVSET) in the feedback divider network. This setting is verified during functional testing and matches the board's labeled configuration on the silkscreen and User's Manual Table 1.

Can the ISL8225MEVAL3Z be used for output voltages above 5.5V?

Yes, but with derating and component changes: for VOUT > 6V, capacitors C10–C14 must be upgraded to 10V-rated parts, and maximum load current drops to 20A at 6.5V and 14A at 7.5V. The ISL8225MEVAL3Z User's Manual explicitly defines these limits in Section 1.2.

Does the ISL8225MEVAL3Z include the ISL8225M power module?

Yes, the ISL8225MEVAL3Z integrates one ISL8225MIRZ dual-phase 15A DC/DC power module in QFN26 package (6.7mm × 6.7mm). This module is the core active component enabling the board's 30A single-output capability through internal phase paralleling.

What are the key thermal design features of the ISL8225MEVAL3Z?

The ISL8225MEVAL3Z uses 2-ounce copper on top/bottom layers, extensive thermal vias under the ISL8225MIRZ module, and solid power planes on Layers 1 and 4 to sustain 30A at 1.2V without cooling. Layout guidelines in AN1790 Rev.2.00 specify phase pad placement on inner layers to minimize noise and maximize thermal transfer.

How is output voltage adjusted on the ISL8225MEVAL3Z?

VOUT is adjusted by replacing RVSET (R3) with a precision resistor per Table 1 in the ISL8225MEVAL3Z User's Manual - e.g., 665Ω for 1.5V, 221Ω for 3.3V. Resistor accuracy directly impacts output regulation; 0.1–0.5% tolerance is recommended to maintain ±1.5% total accuracy for the ISL8225MEVAL3Z.