Renesas ISL9440CEVAL1Z

Overview

ISL9440CEVAL1Z from Renesas Electronics is an evaluation board designed to characterize the ISL9440C quad-output controller, which integrates three synchronous buck PWM controllers (1.0V/6A, 3.3V/7A, 5.0V/5A) and one LDO controller (2.5V/1.0A), operating at 600kHz with programmable soft-start and OV/OC/OT protection.

For engineers reviewing the ISL9440CEVAL1Z datasheet, ISL9440CEVAL1Z setup, ISL9440CEVAL1Z test configuration, or ISL9440CEVAL1Z performance validation, this board enables rapid evaluation of multi-rail power sequencing, load transient response (e.g., 1.5A→4.5A step on PWM1), output ripple (≤66.5mV_P-P), and efficiency (up to 95% at 12V_IN), using standard lab equipment including 100MHz oscilloscopes and electronic loads.

Technical Context

The ISL9440CEVAL1Z implements the ISL9440C controller in a fully assembled, tested layout with discrete MOSFETs (IRF7907 for high-side/low-side on PWM1–PWM3, Si4423DY for LDO), shielded inductors (1.0µH, 1.8µH, 2.8µH), and POSCAP/MLCC output capacitors. It supports independent enable/soft-start per channel and uses current-mode control with internal compensation.

Test conditions specify 6–16V input, 1.0V/6A, 3.3V/7A, 5.0V/5A, and 2.5V/1.0A outputs, with measured peak-to-peak ripple of 19.8mV (VOUT1), 59.6mV (VOUT2), and 66.5mV (VOUT3) under full load at 12V_IN, and load transient undershoot/overshoot validated per Figures 11–13.

Key Specifications

Availability

ISL9440CEVAL1Z is available at Aetrix Electronics and suitable for multi-rail power architecture validation, buck controller reference design verification, and LDO integration testing requiring stable component supply and documented test methodology.

Supply support for ISL9440CEVAL1Z 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 enterprise applications.

The ISL9440CEVAL1Z belongs to Renesas' precision multi-output power management evaluation platform line, engineered to accelerate development of complex power systems for servers, telecom infrastructure, and high-density embedded systems.

FAQ

What is the primary function of the ISL9440CEVAL1Z?

The ISL9440CEVAL1Z is an evaluation board for the ISL9440C quad-output controller. Its primary function is to provide a ready-to-test hardware platform that implements three synchronous buck regulators and one LDO regulator, enabling engineers to validate voltage accuracy, load transient response, efficiency, and sequencing behavior of the ISL9440C in real-world conditions without custom PCB design.

Which controller IC does the ISL9440CEVAL1Z evaluate?

The ISL9440CEVAL1Z evaluates the ISL9440C - a quad-output power controller integrating three current-mode synchronous buck PWM controllers (with 600kHz switching frequency and programmable soft-start) and one LDO controller. The board populates the ISL9440C (U1) as its core IC and includes all necessary external components for full functional demonstration.

What input voltage range does the ISL9440CEVAL1Z support?

The ISL9440CEVAL1Z supports an input voltage range of 6.0V to 16V, as specified in its electrical characteristics table. This range accommodates common intermediate bus voltages used in server, networking, and industrial power systems, and is validated across all four output rails under full-load conditions.

Can the ISL9440CEVAL1Z be used to test load transient performance?

Yes, the ISL9440CEVAL1Z includes dedicated load transient test points and circuitry (e.g., optional MOSFET gates R22/R24/R26 and current-sense resistors) to inject controlled current steps. Performance curves in Figures 11–13 show measured transient response for PWM1 (1.5A→4.5A), PWM2 (1.5A→4.5A), and PWM3 (1A→3A), confirming stability and recovery behavior of the ISL9440C control loop.

What are the key output specifications validated on the ISL9440CEVAL1Z?

The ISL9440CEVAL1Z validates four regulated outputs: VOUT1 = 1.00V ±3% @ 6A, VOUT2 = 3.32V ±3% @ 7A, VOUT3 = 5.00V ±3% @ 5A, and VOUT4 (LDO) = 2.50V ±3% @ 1.0A. It also measures output ripple (e.g., 19.8mV_P-P on VOUT1), efficiency (up to 95%), and thermal performance under full load at 12V_IN.