Renesas ISLUSPLUS-UC1DEMO1Z

Overview

The ISLUSPLUS-UC1DEMO1Z from Renesas Electronics is a demonstration board designed to deliver a complete, sequenced, PMBus-enabled power supply reference solution for Xilinx Zynq UltraScale+ MPSoC devices operating in Use Case 1 (always-on, cost-optimized) configuration. It supports ZU2CG, ZU2EG(A), ZU3CG, and ZU3EG devices with ten regulated output rails - including 0.85V/7.75A (Rail 1), 1.8V/1.04A (Rail 2), and configurable outputs up to 3.3V - all derived from an 8–13.2V input.

For engineers reviewing the ISLUSPLUS-UC1DEMO1Z datasheet, ISLUSPLUS-UC1DEMO1Z pinout, ISLUSPLUS-UC1DEMO1Z application, or ISLUSPLUS-UC1DEMO1Z equivalent, this board serves as a validated hardware platform for evaluating power sequencing, PMBus-based voltage adjustment, and multi-rail consolidation in Zynq US+ MPSoC systems - particularly where rail count reduction, startup timing control, and programmable margining are critical design requirements.

Technical Context

The ISLUSPLUS-UC1DEMO1Z implements a hierarchical power architecture using discrete ICs: a ZL9010M digital power module for high-current Rail 1, ISL85003 buck regulator for Rail 2, ISL9021A LDO for low-noise Rail 3, and multiple ISL85415 buck regulators for Rails 4–10. Sequencing is managed by an ISL8702A quad sequencer that enforces precise power-up and power-down timing across all rails per Xilinx specifications.

All ten output rails are accessible via dedicated terminal blocks (J2–J12), and voltage levels for Rails 1, 4, 5, 9, and 10 are adjustable via external resistor dividers or PMBus commands. The board includes Kelvin remote sense on Rail 1 and supports full PMBus v1.2 communication via XS1 (2×10 header) for real-time telemetry, fault logging, and dynamic configuration.

Key Specifications

Availability

ISLUSPLUS-UC1DEMO1Z is available at Aetrix Electronics and suitable for Zynq UltraScale+ MPSoC evaluation, power architecture prototyping, and production-ready power subsystem validation requiring stable component supply, traceable sourcing, and long-term lifecycle support.

Supply support for ISLUSPLUS-UC1DEMO1Z 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 infrastructure applications.

The ISLUSPLUS-UC1DEMO1Z belongs to Renesas' Industrial Analog and Power reference design portfolio, developed specifically to accelerate adoption of Xilinx Zynq UltraScale+ MPSoCs by providing fully characterized, application-validated power delivery hardware.

FAQ

What is the primary purpose of the ISLUSPLUS-UC1DEMO1Z?

The ISLUSPLUS-UC1DEMO1Z is a demonstration board that provides a complete, pre-validated power supply reference design for Xilinx Zynq UltraScale+ MPSoC devices configured in Use Case 1 (always-on, cost-optimized). It delivers ten precisely sequenced, PMBus-controllable output rails from an 8–13.2V input, enabling rapid evaluation and integration of the full power architecture required by ZU2CG, ZU2EG(A), ZU3CG, and ZU3EG devices. The ISLUSPLUS-UC1DEMO1Z eliminates the need for custom power design during early development phases.

Which Zynq UltraScale+ MPSoC devices does the ISLUSPLUS-UC1DEMO1Z support?

The ISLUSPLUS-UC1DEMO1Z is explicitly validated for the Xilinx Zynq UltraScale+ ZU2CG, ZU2EG(A), ZU3CG, and ZU3EG devices in Use Case 1 configuration. Its rail definitions - including VCCINT, VCCAUX, VMGTAVTT, VCCO_PSIO, and others - match the power domain mapping and current requirements specified in Xilinx documentation for these devices. The ISLUSPLUS-UC1DEMO1Z does not support Use Case 2 or 3 configurations.

How is power sequencing implemented on the ISLUSPLUS-UC1DEMO1Z?

Power sequencing on the ISLUSPLUS-UC1DEMO1Z is handled by the ISL8702A quad sequencer (U11), which monitors enable signals and controls the turn-on/turn-off timing of all ten output rails per Xilinx Zynq UltraScale+ MPSoC requirements. The sequence is fixed in hardware and verified in Figures 37–40 of the user's manual. The ISLUSPLUS-UC1DEMO1Z does not rely on FPGA-controlled GPIO or software-based sequencing - ensuring deterministic, repeatable behavior across power cycles.

Can output voltages on the ISLUSPLUS-UC1DEMO1Z be adjusted, and if so, how?

Yes - output voltages for Rails 1, 4, 5, 9, and 10 are adjustable. Rail 1 can be set to 0.9V by replacing R5 with 17.8kΩ or via PMBus command; Rails 4, 5, 9, and 10 use resistor dividers (R26, R37, R67, R68) with equations provided in the manual. All adjustments retain full PMBus monitoring capability. The ISLUSPLUS-UC1DEMO1Z does not support voltage adjustment on Rails 2, 3, 6, 7, or the fixed 1.2V/1.8V rails without hardware modification.

Does the ISLUSPLUS-UC1DEMO1Z include remote sensing, and on which rail?

Yes - the ISLUSPLUS-UC1DEMO1Z implements Kelvin remote sensing exclusively on Rail 1 (0.85V/7.75A), connected directly to the ZL9010M power module (U1). This compensates for PCB trace resistance and ensures accurate regulation at the MPSoC ball, critical for high-current core rails. Remote sense connections are routed separately from power paths and labeled "VSENSE+" and "VSENSE−" on the schematic. No other rails on the ISLUSPLUS-UC1DEMO1Z feature remote sensing.