Renesas ISL80031ADEMO1Z

Overview

ISL80031ADEMO1Z from Renesas Electronics (formerly Intersil) is a 3A, PFM-mode, 2MHz synchronous step-down DC/DC converter demonstration board designed to evaluate the ISL80031A buck regulator in point-of-load applications with 2.7V–5.5V input and fixed 1.8V output. It features negative current protection, internal soft-start/soft-stop, overcurrent, short-circuit, and thermal protection.

For engineers reviewing the ISL80031ADEMO1Z datasheet, ISL80031ADEMO1Z pinout, ISL80031ADEMO1Z application, or ISL80031ADEMO1Z equivalent, this board enables rapid validation of efficiency (up to 95%), transient response, layout best practices, and protection behavior under real 3A load conditions at 2MHz switching frequency.

Technical Context

The ISL80031ADEMO1Z implements peak current mode control architecture using the ISL80031A IC, enabling stable operation at low duty cycles and fast transient response. It supports PFM mode for high light-load efficiency and integrates all power-stage components-including 1.0µH shielded inductor, 22µF X5R output capacitors, and precision feedback resistors-on a compact 2-layer PCB.

Designed for evaluation of monolithic 8-pin DFN (2mm × 2mm, 1mm height) regulators, the board routes critical high-di/dt paths (PHASE–PGND–VIN–L–COUT) with short, wide traces and uses an EPAD-connected ground plane with ≥4 thermal vias to ensure thermal integrity and EMI performance during 3A continuous operation.

Key Specifications

Availability

ISL80031ADEMO1Z is available at Aetrix Electronics and suitable for point-of-load power design, DC/DC converter evaluation, and embedded system prototyping requiring stable component supply and validated reference layouts.

Supply support for ISL80031ADEMO1Z 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 Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT applications.

The ISL80031ADEMO1Z belongs to Renesas' high-efficiency, low-quiescent-current DC/DC evaluation platform family, engineered to accelerate adoption of compact, thermally robust, and protection-rich buck converters in space-constrained power designs.

FAQ

What is the primary function of the ISL80031ADEMO1Z?

The ISL80031ADEMO1Z is a fully assembled demonstration board that evaluates the ISL80031A 3A, 2MHz PFM synchronous buck converter. It provides immediate access to key performance metrics-including efficiency, startup/shutdown behavior, and protection responses-without requiring custom PCB design or component selection. The ISL80031ADEMO1Z includes all necessary passives, test points, and thermal design features to replicate real-world deployment conditions.

Does the ISL80031ADEMO1Z support adjustable output voltage?

No, the ISL80031ADEMO1Z is configured for a fixed 1.8V output using factory-set feedback resistors (R1 = 200kΩ, R2 = 100kΩ). It is not user-adjustable; output voltage change requires resistor replacement and revalidation. The ISL80031ADEMO1Z is intended for rapid evaluation of the ISL80031A's performance at its default 1.8V setting, commonly used for low-power logic and memory interfaces.

What input voltage range is supported by the ISL80031ADEMO1Z?

The ISL80031ADEMO1Z supports an input voltage range of 2.7V to 5.5V, matching the operating range of the underlying ISL80031A IC. This allows direct connection to common sources such as single-cell Li-ion batteries (3.0–4.2V), USB 5V ports, or regulated 3.3V/5V system rails. Input voltage must remain within this window to ensure proper regulation and protection functionality on the ISL80031ADEMO1Z.

How is thermal performance managed on the ISL80031ADEMO1Z?

Thermal performance on the ISL80031ADEMO1Z is managed through the ISL80031A's exposed thermal pad (EPAD), which connects directly to an internal ground plane with at least four dedicated vias. The board layout minimizes thermal resistance by maximizing copper area under the IC and ensuring low-impedance ground return paths. This design sustains 3A continuous output at ambient +25°C without forced airflow, as verified in the UG047 test data for the ISL80031ADEMO1Z.

Can the ISL80031ADEMO1Z be used to evaluate both PWM and PFM modes?

No-the ISL80031ADEMO1Z is specifically configured for PFM mode operation at 2MHz, matching the ISL80031A's native control scheme. It does not support PWM mode evaluation; for PWM testing, users should select the ISL80030ADEMO1Z board. The ISL80031ADEMO1Z's firmware-independent PFM operation delivers high light-load efficiency and is optimized for applications where dynamic load changes and standby power matter most.