Renesas ISL9440AEVAL1Z

Overview

ISL9440AEVAL1Z from Renesas Electronics is an evaluation board designed to characterize the ISL9440A quad-output controller, which integrates three synchronous buck PWM controllers (1.0V/3.3V/5.0V outputs) and one 2.5V LDO controller. It supports 6–16V input, delivers up to 7A per PWM channel, and features current-mode control with internal compensation, 600kHz switching frequency, and comprehensive protection (UV/OV/OC/OT).

For engineers reviewing the ISL9440AEVAL1Z datasheet, ISL9440AEVAL1Z setup, ISL9440AEVAL1Z test configuration, or ISL9440AEVAL1Z performance validation, this board enables rapid evaluation of multi-rail power sequencing, load transient response, efficiency mapping, and ripple/noise behavior under real-world conditions with minimal external components.

Technical Context

The ISL9440AEVAL1Z implements the ISL9440A controller in a fully assembled, tested layout with optimized power delivery paths, thermal management, and probing points. It uses shielded inductors (1.0µH, 1.8µH, 2.8µH), POSCAP and ceramic output capacitors, and dual-N/P-MOSFETs (IRF7907, Si4423DY) to support stable operation across all four regulated outputs.

Test-ready features include jumper-enabled enable controls (J3/J4/J5), dedicated test points (TP1–TP21), and documented load transient circuitry using SOIC8 N-MOSFETs and precision current-sense resistors - enabling accurate measurement of regulation accuracy (±3%), peak-to-peak ripple (19.4–36.6 mV_P-P), and dynamic response under step loads.

Key Specifications

Availability

ISL9440AEVAL1Z is available at Aetrix Electronics and suitable for multi-rail power architecture validation, DC-DC controller qualification, and embedded system bring-up requiring stable component supply and documented reference performance.

Supply support for ISL9440AEVAL1Z 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 with emphasis on reliability and system-level integration.

The ISL9440AEVAL1Z belongs to Renesas' power management evaluation platform family, engineered specifically to accelerate development of high-efficiency, multi-output DC-DC systems for FPGA, ASIC, and processor-based designs.

FAQ

What is the primary function of the ISL9440AEVAL1Z?

The ISL9440AEVAL1Z is an evaluation board that implements the ISL9440A quad-output controller. It provides a ready-to-test platform for validating the performance of three synchronous buck regulators (1.0V, 3.3V, 5.0V) and one LDO (2.5V) under real operating conditions including load transients, efficiency mapping, and ripple analysis. The ISL9440AEVAL1Z includes all necessary passive components, MOSFETs, and test points per the AN1551 user manual.

Does the ISL9440AEVAL1Z support independent enable control for each output?

Yes, the ISL9440AEVAL1Z supports independent enable control via jumpers J3 (EN1), J4 (EN2), and J5 (EN3), allowing individual activation or disabling of the three PWM outputs while retaining LDO functionality. This enables staged power sequencing validation and isolation of specific rail behavior during testing - a capability directly enabled by the ISL9440A's integrated enable logic and implemented in the ISL9440AEVAL1Z hardware layout.

What input voltage range and load capability does the ISL9440AEVAL1Z support?

The ISL9440AEVAL1Z operates over a 6.0–16V input range and supports up to 7A on PWM1 and PWM2 outputs, 5A on PWM3, and 1.0A on the LDO output. These ratings are verified per the "Electrical Specifications" table in AN1551 Rev 0.00 and reflect thermal limits under no forced airflow at +25°C ambient - confirming the ISL9440AEVAL1Z's suitability for evaluating high-current, multi-rail power delivery in space-constrained applications.

Can the ISL9440AEVAL1Z be used to measure load transient response?

Yes, the ISL9440AEVAL1Z includes documented load transient circuitry (Figure 4, AN1551) using optional MOSFETs (M6/M7/M8) and precision sense resistors (R23/R24/R26). It enables controlled current-step testing (e.g., 1.5A→4.5A on PWM1) with oscilloscope monitoring of overshoot/undershoot - validated by Figures 15–17 showing <100mV excursions. This capability is integral to the ISL9440AEVAL1Z's design for characterizing dynamic regulation performance.

What documentation and supporting materials ship with the ISL9440AEVAL1Z?

The ISL9440AEVAL1Z ships with the physical evaluation board, the ISL9440/ISL9440A/ISL9441 datasheet (FN6383), and the dedicated user manual AN1551 Rev 0.00. AN1551 provides complete setup instructions, electrical specifications, schematic (page 7), bill of materials (pages 8–9), PCB layer drawings (pages 10–11), and performance curves - ensuring users can immediately configure, test, and interpret results without external reference sources.