Renesas ISL78263EVAL1Z

Overview

ISL78263EVAL1Z from Renesas Electronics is an automotive-grade evaluation board for the ISL78263 dual synchronous controller IC, enabling rapid validation of 42V boost + low-I_Q buck regulation in cold-crank and always-on systems. It supports pre-boost buck operation down to 2.1V input, delivers 2A/3A MOSFET drive capability, and implements programmable spread spectrum clocking across 200kHz–2.2MHz switching frequencies.

For engineers reviewing the ISL78263EVAL1Z datasheet, ISL78263EVAL1Z pinout, ISL78263EVAL1Z application, or ISL78263EVAL1Z equivalent, this board provides full access to all ISL78263 control pins (EN1/EN2, SYNC, CNT, CNT2, VSEL), configurable feedback networks, boot capacitor interfaces, and isolated current-sense inputs - essential for validating cold-crank transient response, ECM mode entry/exit timing, and dual-channel phase-shifted operation under AEC-Q100 Grade 1 conditions.

Technical Context

The ISL78263EVAL1Z implements the complete functional interface of the ISL78263 controller, including independent enable paths for buck (EN1) and boost (EN2) channels, synchronized 180° phase-shifted PWM outputs (HS1/LS1, HS2/LS2), and dedicated current-sense terminals (ISEN1P/N, ISEN2P/N) with ±40mV zero-cross detection thresholds. It routes all 32 pins of the 5mm×5mm WFQFN package to test points or headers, preserving signal integrity for high-side gate drive (BOOT1/BOOT2), feedback (FB1/FB2), and compensation (COMP1/COMP2).

Board-level design incorporates critical support circuitry: 10µF VCC decoupling, external diode-based boot capacitor charging paths, RT resistor selection for frequency programming, and TERM pin termination for buck feedback divider grounding. It enables direct measurement of PGOOD1/PGOOD2 timing (10–20µs filter delay), VIN undervoltage lockout (5.455–5.845V), and ECM entry threshold (5.6–5.85V) under real load and transient conditions.

Key Specifications

Availability

ISL78263EVAL1Z is available at Aetrix Electronics and suitable for automotive ADAS development, in-cabin infotainment qualification, and start-stop system validation requiring stable component supply and full AEC-Q100-compliant reference hardware.

Supply support for ISL78263EVAL1Z 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 leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and IoT applications.

The ISL78263EVAL1Z belongs to Renesas' automotive power management evaluation platform family, designed specifically to accelerate development of robust front-end regulators for cold-crank resilient systems in ADAS, digital clusters, and e-mirror applications.

FAQ

What is the primary function of the ISL78263EVAL1Z evaluation board?

The ISL78263EVAL1Z evaluation board is a fully assembled and tested platform for the ISL78263 dual synchronous controller IC. It enables engineers to validate the device's pre-boost buck operation, cold-crank transient response down to 2.1V input, low-quiescent-current (6µA) ECM mode, and dual-channel phase-shifted switching - all under AEC-Q100 Grade 1 conditions. The board provides direct access to every ISL78263 pin and key performance metrics without requiring custom PCB design.

Does the ISL78263EVAL1Z support both fixed and adjustable output configurations for the ISL78263?

Yes, the ISL78263EVAL1Z supports all ISL78263 output configurations: buck channel fixed 3.3V/5.0V outputs (via VSEL resistor selection), buck adjustable 0.8V–5.0V, and boost adjustable 5.0V–40V. It includes populated resistive dividers for FB1 and FB2, jumpers for VSEL/CNT/CNT2 level programming, and test points for COMP1/COMP2 loop compensation network tuning - enabling immediate validation of any ISL78263 output mode.

How does the ISL78263EVAL1Z facilitate EMI reduction testing for the ISL78263?

The ISL78263EVAL1Z implements full spread spectrum clocking (SSC) functionality as specified for the ISL78263. It provides accessible CNT pin test points and onboard resistor options to configure SSC narrow mode (±6%) or wide mode (±12%), and supports external SYNC input (200kHz–2.4MHz) for synchronized multi-board EMI suppression. This allows direct measurement of conducted/emission improvements using standard LISN and spectrum analyzers.

Can the ISL78263EVAL1Z be used to verify thermal shutdown behavior of the ISL78263?

Yes, the ISL78263EVAL1Z exposes the ISL78263's thermal shutdown circuitry with direct access to the die temperature sensing path. Engineers can apply controlled thermal stress and monitor PGOOD deassertion, oscillator stall, and channel disable timing while verifying the specified 151–175°C trip point (rising) and 145°C reset (falling) with 15°C hysteresis - confirming compliance with AEC-Q100 Grade 1 thermal requirements.

Is the ISL78263EVAL1Z compatible with standard lab equipment for transient testing?

Yes, the ISL78263EVAL1Z features SMA connectors for VIN and VOUT monitoring, 0.1" pitch headers for all digital control signals (EN1, EN2, SYNC), and Kelvin-sense test points for current-sense resistors (ISEN1P/N, ISEN2P/N). Its layout maintains signal integrity for high-speed oscilloscope measurements of 15ns minimum on-times, 25ns dead times, and PGOOD timing (10–20µs), making it fully compatible with standard automotive transient test setups including battery simulators and load step generators.