Renesas ISL62881CGPUEVAL2Z

Overview

The ISL62881CGPUEVAL2Z from Renesas Electronics is an evaluation board designed to demonstrate the performance of the ISL62881C single-phase synchronous-buck PWM GPU VCORE controller, which implements Intel IMVP-6.5 protocol and features Robust Ripple Regulator (R3™) technology. It supports input voltage range 4.5–20V, output voltage 0–1.5V, and full-load current up to 26A at 300kHz switching frequency - enabling validation of transient response, efficiency, and VID-based dynamic voltage scaling in GPU power delivery systems.

For engineers reviewing the ISL62881CGPUEVAL2Z datasheet, ISL62881CGPUEVAL2Z test setup, ISL62881CGPUEVAL2Z interface connections, or ISL62881CGPUEVAL2Z dynamic load capability, this board provides a fully assembled, documented reference platform with on-board dynamic-load generator, comprehensive test points, configurable DIP switches, and support for standard lab equipment including oscilloscopes, electronic loads, and adjustable DC supplies.

Technical Context

The ISL62881CGPUEVAL2Z implements a complete single-phase IMVP-6.5-compliant GPU core voltage regulation system centered on the ISL62881C QFN-28 controller, paired with HIP2100IBZ half-bridge driver and discrete MOSFETs (IRF7821/IRF7832). It integrates a 300µs, ~0.2Ω on-board dynamic-load emulator for transient-response characterization and supports full VID0–VID6 programming via U2 DIP switch.

Power stage design includes a 0.56µH inductor (ETQP4LR56AFC), input voltage sensing (TP31/TP32), output voltage monitoring (J10, TP14), and critical signal access (VR_ON, DPRSLPVR, PGOOD, COMP, FB, IMON) - all mapped to labeled test points and binding posts (J5/J6/J12/J14) for non-invasive measurement and control.

Key Specifications

Availability

The ISL62881CGPUEVAL2Z is available at Aetrix Electronics and suitable for GPU power design validation, IMVP-6.5 compliance verification, and transient-response benchmarking requiring stable component supply, traceable documentation, and production-representative layout.

Supply support for ISL62881CGPUEVAL2Z 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 manufacturer delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT applications.

The ISL62881C product line targets high-efficiency, high-accuracy GPU core voltage regulation in notebook and mobile computing platforms, optimized for Intel IMVP-6.5 protocol compliance, fast transient response, and thermal robustness under dynamic workloads.

FAQ

What is the primary function of the ISL62881CGPUEVAL2Z evaluation board?

The ISL62881CGPUEVAL2Z evaluation board is a fully assembled hardware platform designed to demonstrate and validate the operation of the ISL62881C GPU VCORE controller. It enables engineers to evaluate key performance metrics - including transient response, efficiency, VID-programmed voltage accuracy, and IMVP-6.5 signaling - using standard lab equipment without custom PCB development. The ISL62881CGPUEVAL2Z includes on-board dynamic loading, comprehensive signal access, and documented schematics/silkscreens per AN1553.

Does the ISL62881CGPUEVAL2Z include the ISL62881C controller IC?

Yes, the ISL62881CGPUEVAL2Z includes the ISL62881CHRTZ controller IC (QFN-28 package) mounted on the board as U6, along with supporting components including the HIP2100IBZ gate driver (U5), power MOSFETs (Q2/Q3/Q8/Q9), and passive network. All required circuitry for single-phase synchronous buck operation - including feedback, compensation, VID decoding, and protection signals - is implemented per the ISL62881C datasheet and AN1553 reference design.

What power supplies are required to operate the ISL62881CGPUEVAL2Z?

The ISL62881CGPUEVAL2Z requires three independent DC supplies: (1) Adjustable 25V/10A for VIN (J5/J6), (2) Fixed 5V/100mA for +5V bias (TP29/TP30), and (3) Fixed 12V/100mA for the on-board dynamic-load generator (TP3/TP2). These are specified in AN1553 Rev 0.00 Section "Recommended Equipment" and must be applied with correct polarity and sequencing to avoid damage to the ISL62881CGPUEVAL2Z board or its components.

How is dynamic load applied on the ISL62881CGPUEVAL2Z?

Dynamic load is applied via an integrated on-board circuit controlled by S2 toggle switch. When S2 is ON, the board generates a 300µs pulse across VO and PGND approximating a 0.2Ω resistive step load - enabling repeatable transient-response measurements without external load equipment. This feature is explicitly documented in AN1553 Section "Hardware Description" and verified in the schematic (Figure 5), where Q15 (SUD50N03-07) and associated timing components implement the pulse generator.

Can the ISL62881CGPUEVAL2Z be used to evaluate other controllers besides ISL62881C?

No - the ISL62881CGPUEVAL2Z is specifically designed and laid out for the ISL62881C controller (U6, QFN-28) and its associated IMVP-6.5 interface, gate drive, and power stage requirements. Component values, layout, feedback network, and signal routing are optimized for that device. Substituting another controller would require redesign of compensation, VID decoding, driver interface, and protection logic - making the ISL62881CGPUEVAL2Z unsuitable as a generic buck evaluation platform.