Renesas ISL8225MEVAL4Z

Overview

The ISL8225MEVAL4Z from Renesas Electronics is a dual 15A/optional 30A cascable evaluation board for the ISL8225M dual step-down power module, configured for 1.2V and 1.5V outputs with 4.5V–20V input, supporting datacom, telecom, and FPGA power delivery.

For engineers reviewing the ISL8225MEVAL4Z datasheet, ISL8225MEVAL4Z pinout, ISL8225MEVAL4Z application, or ISL8225MEVAL4Z equivalent, this page provides verified board-level specifications, thermal layout guidance, cascading configuration details, and dual/single output mode setup procedures.

Technical Context

The ISL8225MEVAL4Z implements the ISL8225M's patented current-sharing architecture across two 15A phases, enabling interleaved operation at 500kHz default switching frequency. It supports phase-shifted cascading via CLKOUT/SYNC pins for multi-board synchronization up to 12-phase systems.

Board-level features include configurable VOUT (0.6V–7.5V) via resistor dividers (R1/R2/R3/R4), selectable operating modes (dual-regulator, DDR, 2-/3-/4-/6-/12-phase), and thermal design optimized for 4-layer FR4 construction with 2-oz copper and internal plane routing for VIN, VOUT, and PGND paths.

Key Specifications

Availability

ISL8225MEVAL4Z is available at Aetrix Electronics and suitable for FPGA power delivery, telecom base station DC/DC conversion, datacenter server VRMs, and industrial embedded computing requiring stable component supply and rapid prototyping support.

Supply support for ISL8225MEVAL4Z 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 manufacturer specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The ISL8225MEVAL4Z belongs to Renesas' Industrial Analog and Power evaluation platform family, designed to accelerate adoption of high-efficiency, thermally robust DC/DC power modules in demanding high-current applications.

FAQ

What is the primary function of the ISL8225MEVAL4Z?

The ISL8225MEVAL4Z is a dual-channel 15A evaluation board for the ISL8225M power module, enabling rapid validation of dual-output or paralleled 30A configurations. It provides complete hardware-including passive components, resistors, jumpers, and layout-so engineers can evaluate performance under real-world load, thermal, and noise conditions without custom PCB design. The ISL8225MEVAL4Z supports multiple operating modes and cascading for scalable multi-phase deployments.

Can the ISL8225MEVAL4Z be used for output voltages above 5.5V?

Yes, the ISL8225MEVAL4Z supports output voltages up to 7.5V, but operation above 5.5V requires capacitor and frequency adjustments per the ISL8225M Design Guide Matrix. At 6.5V output, maximum per-phase current is derated to 10A; at 7.5V, it drops to 7A. The ISL8225MEVAL4Z user manual specifies that higher-voltage operation necessitates verifying input/output capacitor selection and switching frequency tuning using RFSET resistor values listed in Table 1.

How do I configure the ISL8225MEVAL4Z for single 30A output mode?

To configure the ISL8225MEVAL4Z for single 30A output, short JP1 (ENC), JP2 (VMON), and JP3 (COMP); set MODE and GND on JP6; replace R14 with 0Ω; open R9 and R13; short R18 and R19; and connect VOUT1 to VOUT2. Input must be applied to BA7 (VIN1) and BA8 (GND) only, with VIN1 and VIN2 tied together. The ISL8225MEVAL4Z then delivers 30A at the configured VOUT (e.g., 1.2V) with interleaved 180° phase shift for ripple reduction.

What are the key thermal design features of the ISL8225MEVAL4Z?

The ISL8225MEVAL4Z uses a 4-layer FR4 PCB with 2-oz copper on all layers, solid power planes for VIN1/VIN2/VOUT1/VOUT2/PGND, and dense thermal vias under the ISL8225M module. Phase pads are routed internally (Layer 2) with ground coverage on Layers 1 and 3 to suppress noise and improve heat spreading. The board operates at full dual-15A load without forced air, but derating applies above 5.5V output or elevated ambient temperatures per ISL8225M datasheet curves.

Does the ISL8225MEVAL4Z support multi-board synchronization?

Yes, the ISL8225MEVAL4Z supports cascading via dedicated CLKOUT (J5) and SYNC (J2) pins. By configuring MODE and VSEN2+ pins per Table 3, users can generate phase-shifted clock signals (e.g., 0°, 90°, 180°, −60°) to synchronize multiple ISL8225MEVAL4Z boards. Up to 12-phase operation is achievable using combinations of Mode 5B, 7A, and external logic - no external clock source is required for standard cascaded setups.