Renesas ISL6263AEVAL1Z

Overview

ISL6263AEVAL1Z from Intersil is a single-phase synchronous-buck voltage regulator evaluation board designed for IMVP-6+ GPU core power delivery, featuring Robust Ripple Regulator (R3) Technology™, 5-bit VID input (0.412V–1.2875V), real-time power monitor output, and integrated MOSFET drivers. It supports up to 25A load current with programmable PWM frequency (200–500kHz) and differential Kelvin sensing for precision GPU die voltage regulation.

For engineers reviewing the ISL6263AEVAL1Z datasheet, ISL6263AEVAL1Z pinout, ISL6263AEVAL1Z application, or ISL6263AEVAL1Z equivalent, this evaluation platform enables rapid validation of GPU render-core VRM designs compliant with Intel IMVP-6+, including dynamic VID slew-rate control, diode-emulation mode configuration, and DCR/resistive current-sensing implementation.

Technical Context

The ISL6263AEVAL1Z implements Intersil's R3 Technology™-a hybrid modulation combining fixed-frequency PWM stability with hysteretic transient response-enabling variable switching frequency during load transients while maintaining ±0.5% system accuracy over 0°C to +100°C. It integrates a droop amplifier, unity-gain differential VSEN/RTN amplifier, and configurable audio-filter PWM mode for audible-noise suppression.

This board evaluates the ISL6263A IC in its native 32-lead 5×5 QFN package, supporting both lossless DCR current sensing (with NTC compensation) and precision resistive shunt sensing. Protection features include 120µs OCP latching, 2µs short-circuit response, ±300mV UVP/OVP thresholds referenced to VSOFT, and PGOOD fault signaling.

Key Specifications

Availability

ISL6263AEVAL1Z is available at Aetrix Electronics and suitable for GPU power delivery validation, IMVP-6+ compliance testing, and high-efficiency mobile graphics VRM development requiring stable component supply and full reference design traceability.

Supply support for ISL6263AEVAL1Z 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

Intersil (now part of Renesas Electronics) is a semiconductor company specializing in high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.

The ISL6263A product line was engineered specifically for Intel IMVP-6+ GPU core voltage regulation, delivering tight static/dynamic accuracy, robust transient response, and integrated power monitoring for notebook and mobile graphics platforms.

FAQ

What is the primary function of the ISL6263AEVAL1Z evaluation board?

The ISL6263AEVAL1Z evaluation board is a fully assembled and tested platform for validating the ISL6263A single-phase synchronous-buck voltage regulator in IMVP-6+ GPU core power applications. It demonstrates real-time power monitoring, dynamic VID programming, differential Kelvin sensing, and configurable diode-emulation mode-enabling engineers to verify performance before integrating the ISL6263A into final GPU VRM designs.

Does the ISL6263AEVAL1Z support both DCR and resistive current sensing?

Yes, the ISL6263AEVAL1Z supports both current sensing methods. It includes layout provisions and component footprints for lossless inductor DCR sensing (with NTC thermistor compensation) and precision resistive shunt sensing, as shown in Figures 2 and 3 of the ISL6263A datasheet. The board allows direct comparison of accuracy, efficiency, and thermal behavior between the two schemes when evaluating the ISL6263A.

How does the ISL6263AEVAL1Z implement IMVP-6+ load-line compliance?

The ISL6263AEVAL1Z implements IMVP-6+ load-line compliance using the ISL6263A's integrated droop amplifier and differential-summing architecture. The DROOP and VO pins measure voltage drop across the current-sense element (DCR or shunt), generating a signal proportional to load current. This is summed differentially with the set-point voltage at VSUM to produce the required voltage droop-ensuring output voltage scales linearly with load per IMVP-6+ specifications.

Can the ISL6263AEVAL1Z be used to evaluate audio noise reduction features?

Yes, the ISL6263AEVAL1Z enables evaluation of the ISL6263A's configurable audio-frequency PWM filter. By setting the AF_EN and FDE pins per Table 1 in the datasheet, users can enable/disable the 28kHz audible-frequency filter during diode-emulation mode-allowing measurement of switching noise spectra, efficiency trade-offs, and audible buzz suppression under light-load conditions typical in GPU idle states.

What protection features are validated on the ISL6263AEVAL1Z board?

The ISL6263AEVAL1Z validates all ISL6263A protection functions: overcurrent protection (OCP) with dual-speed response (120µs for moderate overloads, 2µs for hard shorts), overvoltage/undervoltage protection (OVP/UVP) referenced to VSOFT (±300mV thresholds), and PGOOD fault signaling. These are implemented via dedicated OCSET, SOFT, and PGOOD circuitry on the board, allowing direct oscilloscope observation of fault timing and recovery behavior for the ISL6263A.