Renesas ISL81802EVAL3Z

Overview

ISL81802EVAL3Z from Renesas Electronics is an evaluation board designed specifically for the ISL81802 dual synchronous buck controller in 38-lead HTSSOP package. It supports dual-output (e.g., 12V/10A + 5V/10A) or single-output interleaved two-phase operation, features full protection (OVP/UVP/OTP/OCP), and enables validation of peak current mode control, phase interleaving, external clock sync, and programmable soft-start across 4.5V–80V input range.

For engineers reviewing the ISL81802EVAL3Z datasheet, ISL81802EVAL3Z pinout, ISL81802EVAL3Z application, or ISL81802EVAL3Z equivalent, this board provides verified reference schematics, thermal layout guidance, component selection guidelines, and functional test points for rapid power supply design validation in telecom, data center, and industrial systems.

Technical Context

The ISL81802EVAL3Z implements the full feature set of the ISL81802 controller-including dual independent voltage/current regulation loops, PLL-based 100kHz–1MHz frequency control with programmable phase shift, adaptive shoot-through protection, and selectable PWM/DE/Burst light-load modes-using the 38-lead HTSSOP variant with EPAD thermal pad.

It validates critical system-level behaviors: startup into pre-biased rails, accurate EN/UVLO thresholds (±2%), PGOOD sequencing, current sharing via cascade phase interleaving, and robust OCP response (pulse-by-pulse + hiccup/constant-current modes) under real-world load transients and thermal conditions.

Key Specifications

Availability

ISL81802EVAL3Z is available at Aetrix Electronics and suitable for telecom power systems, server VRMs, and industrial DC-DC converter development requiring stable component supply, repeatable test environments, and production-ready layout validation.

Supply support for ISL81802EVAL3Z 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 is a global semiconductor manufacturer specializing in microcontrollers, analog, power management, and timing solutions for industrial, automotive, and infrastructure markets.

The ISL81802EVAL3Z belongs to Renesas' high-voltage DC-DC controller evaluation platform family, engineered to accelerate time-to-market for robust, high-efficiency, multi-rail power supplies in demanding 48V/54V/80V systems.

FAQ

What is the primary function of the ISL81802EVAL3Z?

The ISL81802EVAL3Z is a dedicated evaluation board for the ISL81802 dual synchronous buck controller in HTSSOP package. It provides a fully assembled, tested platform to validate dual-output or interleaved two-phase buck converter designs-including voltage/current regulation, phase interleaving, protection behavior, and thermal performance-across 4.5V–80V input range. The ISL81802EVAL3Z enables rapid prototyping without custom PCB development.

Which ISL81802 package does the ISL81802EVAL3Z support?

The ISL81802EVAL3Z is specifically designed for the ISL81802 in the 38-lead HTSSOP package (part number ISL81802FVEZ-T). It matches the pinout, thermal pad (EPAD) connection, and layout requirements defined in the ISL81802 datasheet for the FVEZ variant-not the 32-lead TQFN version. All test points, component footprints, and routing reflect the HTSSOP mechanical and electrical interface.

Does the ISL81802EVAL3Z support external clock synchronization?

Yes, the ISL81802EVAL3Z supports external clock synchronization via the RT/SYNC pin of the mounted ISL81802. The board includes a dedicated SMA connector and routing path to inject an external clock signal, enabling precise frequency alignment and phase interleaving across multiple ISL81802 controllers in parallel or cascaded configurations. This functionality is verified per Section 4.10 of the ISL81802 datasheet.

Can the ISL81802EVAL3Z be used for pre-biased power-up testing?

Yes, the ISL81802EVAL3Z supports startup into pre-biased output rails-a key feature of the ISL81802 controller. The board's configuration preserves the internal circuitry required for controlled soft-start under pre-bias conditions, including proper biasing of COMP1/COMP2, FB1/FB2, and SS/TRK pins. This capability is confirmed in Section 4.7 of the ISL81802 datasheet and validated on the ISL81802EVAL3Z hardware.

What protection features are demonstrated on the ISL81802EVAL3Z?

The ISL81802EVAL3Z demonstrates all core protections of the ISL81802: overvoltage (OVP), undervoltage (UVP), overtemperature (OTP), and comprehensive overcurrent protection-including pulse-by-pulse peak limiting, average current regulation, and selectable hiccup or constant-current OCP modes. These are implemented using the controller's internal comparators and fault logic, with status indicators and shutdown behavior verified per Sections 4.13 and 5 of the ISL81802 datasheet.