Renesas ISL6261AEVAL1Z

Overview

ISL6261AEVAL1Z from Intersil is an evaluation board for the ISL6261A single-phase IMVP-6® core voltage regulator IC, designed to validate power delivery to Intel mobile CPUs up to 25A. It implements R3™ modulator technology, supports DCR/resistive current sensing, provides 0.5% system voltage accuracy over temperature, and enables CCM/DEM/EDEM operation modes via DPRSLPVR, DPRSTP#, and FDE control signals.

For engineers reviewing the ISL6261AEVAL1Z datasheet, ISL6261AEVAL1Z pinout, ISL6261AEVAL1Z application, or ISL6261AEVAL1Z equivalent, this board delivers verified IMVP-6® compliance, real-time CPU power monitoring via PMON, differential remote voltage sensing at the die, and configurable soft-start slew rates for active/deeper-sleep transitions.

Technical Context

The ISL6261AEVAL1Z implements a complete reference design for the ISL6261A controller, including gate driver circuitry, bootstrap diode network, VID decoding logic, thermal monitoring with NTC interface, and dual-current-sensing support (inductor DCR or precision resistor). It routes all 40 pins of the ISL6261A QFN package to test points and connectors.

It validates critical IMVP-6® timing sequences-including VR_ON enable, CLK_EN# assertion after 13 clock cycles, PGOOD delay (~7ms), and DPRSTP#/DPRSLPVR-driven mode transitions-while supporting user-adjustable switching frequency (200–500 kHz) via VW-COMP resistor and programmable droop compensation via OCSET.

Key Specifications

Availability

ISL6261AEVAL1Z is available at Aetrix Electronics and suitable for Intel mobile CPU power validation, IMVP-6® compliance testing, and laptop/desktop motherboard reference design verification requiring stable component supply and full-feature evaluation capability.

Supply support for ISL6261AEVAL1Z 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 power management ICs for computing, industrial, and communications applications.

The ISL6261A product line was engineered specifically for Intel IMVP-6® mobile CPU core regulation, delivering fast transient response via R3™ modulator architecture, multi-mode efficiency optimization, and integrated gate drivers to reduce system cost and PCB area.

FAQ

What is the primary function of the ISL6261AEVAL1Z evaluation board?

The ISL6261AEVAL1Z evaluation board is a fully assembled and tested platform for validating the ISL6261A single-phase IMVP-6® core voltage regulator IC. It enables engineers to verify dynamic voltage scaling, load-line accuracy, mode transitions (CCM/DEM/EDEM), power monitor functionality (PMON), and thermal protection behavior under real Intel CPU interface conditions before integrating into final designs.

Does the ISL6261AEVAL1Z support both DCR and resistive current sensing methods?

Yes, the ISL6261AEVAL1Z supports both lossless inductor DCR current sensing-with provision for NTC thermistor network connection to compensate copper winding resistance drift-and precision resistive current sensing using an external sense resistor. The board includes dedicated routing and component footprints for either method per Figures 2 and 3 of the ISL6261A datasheet (FN6354).

How does the ISL6261AEVAL1Z implement IMVP-6® mode transitions like deeper sleep entry and exit?

The ISL6261AEVAL1Z implements IMVP-6® mode transitions by directly interfacing DPRSTP#, DPRSLPVR, and FDE signals to the ISL6261A IC as specified in Table 2 of FN6354. It validates correct timing for DEM/EDEM activation (e.g., three consecutive PWM pulses with PHASE > 0 V), soft-start slew rate modulation (±2 mV/µs vs. ±10 mV/µs), and CLK_EN# assertion 13 cycles after VO reaches within 20 mV of boot voltage.

Can the ISL6261AEVAL1Z be used to measure real-time CPU power consumption?

Yes, the ISL6261AEVAL1Z provides direct access to the PMON pin of the ISL6261A, which outputs a high-bandwidth analog voltage (VPMON) representing instantaneous CPU power: VPMON = 35 × (VSEN − RTN) × (DROOP − VO). This signal is buffered and routed to a test point, enabling oscilloscope or ADC-based power profiling without additional signal conditioning.

What is the recommended replacement for the ISL6261A IC used on the ISL6261AEVAL1Z board?

The ISL6261AEVAL1Z board is designed for the ISL6261A IC, which Intersil explicitly marks as "NOT RECOMMENDED FOR NEW DESIGNS" with ISL62884C listed as the recommended replacement part. While the ISL6261AEVAL1Z itself remains valid for legacy validation, new designs should use evaluation platforms compatible with the ISL62884C or its successors to ensure long-term supply and feature alignment with current IMVP specifications.