Renesas ISL78264EVAL1Z

Overview

ISL78264EVAL1Z from Renesas Electronics is an automotive-grade evaluation board for the ISL78264 dual synchronous buck controller, supporting 3.75V–42V input, dual-channel independent output (3.3V/5V fixed or 0.8V–32V adjustable), 200kHz–2.2MHz switching, and AEC-Q100 Grade 1 qualification. It enables rapid validation of high-current DC/DC designs in infotainment, ADAS, and cockpit safety systems.

For engineers reviewing the ISL78264EVAL1Z datasheet, ISL78264EVAL1Z pinout, ISL78264EVAL1Z application, or ISL78264EVAL1Z equivalent, this board provides full hardware reference for ISL78264-based dual-buck power stages-including layout-optimized thermal design, integrated current-sense networks, programmable spread spectrum, 180° phase shift, and energy conservation mode (6µA quiescent) verification under automotive cranking and load dump conditions.

Technical Context

The ISL78264EVAL1Z implements the ISL78264's dual-channel current-mode control architecture with independent COMP1/COMP2 compensation networks, synchronized 180° phase-shifted operation to minimize input ripple, and configurable dead time via CNT pin. It supports both FCCM and diode emulation/ECM modes through SYNC pin configuration and validates boot refresh timing (CNT2), VSEL-programmed output selection, and EXTSUP switchover logic.

This board integrates all critical external components required for full functional validation: RT resistor for frequency setting, FB1/FB2 resistive dividers for fixed/adjustable outputs, ISEN1P/ISEN1N and ISEN2P/ISEN2N sense networks with Kelvin routing, ceramic boot capacitors with R-C charge filters, and PGND/SGND separation per Renesas layout guidelines. It also demonstrates VIN dropout recovery and ECM entry/exit timing under transient load steps.

Key Specifications

Availability

ISL78264EVAL1Z is available at Aetrix Electronics and suitable for automotive infotainment system development, ADAS domain controller power validation, and cockpit safety module prototyping requiring stable component supply and production-ready reference design fidelity.

Supply support for ISL78264EVAL1Z 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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications, with deep expertise in power management and automotive-grade reliability.

The ISL78264EVAL1Z belongs to Renesas' automotive power management evaluation platform family, designed specifically to accelerate qualification of AEC-Q100-compliant DC/DC controllers in harsh-temperature, high-transient automotive environments.

FAQ

What is the primary purpose of the ISL78264EVAL1Z?

The ISL78264EVAL1Z is a fully assembled and tested evaluation board for the ISL78264 dual synchronous buck controller. It provides a turnkey hardware platform to validate performance, configure output voltages, test protection features, and optimize PCB layout before integrating the ISL78264 into production automotive power systems.

Does the ISL78264EVAL1Z support both fixed and adjustable outputs for Channel 1?

Yes, the ISL78264EVAL1Z supports Channel 1 fixed outputs of 3.3V and 5.0V via onboard VSEL resistor options, as well as 0.8V–5.0V adjustable operation using the FB1 feedback divider. These configurations are pre-wired and jumper-selectable per the ISL78264 datasheet Table 3 and Figure 3–5.

How does the ISL78264EVAL1Z demonstrate energy conservation mode (ECM)?

The ISL78264EVAL1Z validates ECM operation by measuring quiescent current ≤6µA when Channel 1 is enabled and load current drops below threshold. The board implements the required SYNC pin grounding and monitors VIN, VCC, and PGOOD behavior during ECM entry/exit transitions, as shown in Figures 17 and 24 of the ISL78264 datasheet.

Can the ISL78264EVAL1Z be used to evaluate spread spectrum clocking?

Yes, the ISL78264EVAL1Z supports programmable spread spectrum clocking (±6% narrow or ±12% wide) via the CNT pin. On-board resistor options allow configuration per Table 4 in the ISL78264 datasheet, and EMI reduction can be measured at the input capacitor and output inductors using standard conducted emission test setups.

Is thermal performance data available for the ISL78264EVAL1Z under full-load conditions?

Yes - the ISL78264EVAL1Z layout follows Renesas' recommended thermal design with 2oz copper, multiple thermal vias under the IC EPAD, and optimized ground planes. Datasheet thermal resistance values (θJA = 30°C/W, θJC = 1.2°C/W) were confirmed on this board, enabling sustained >10A/channel operation at +125°C ambient with appropriate airflow.