Renesas ISL91302B40-EVZ

Overview

ISL91302B40-EVZ from Renesas Electronics is an evaluation board for the ISL91302B dual/single-output multiphase buck PMIC configured in 4+0 phase mode, supporting up to 5A per phase, 2.5–5.5V input, and programmable 0.3–2.0V output voltage. It integrates four power stages with R5 modulator control, enabling ultra-fast transient response (e.g., 50A/µs per phase) and high peak efficiency (94.7% at 3.8V_IN/1.8V_OUT) for mobile CPU/GPU core power applications.

For engineers reviewing the ISL91302B40-EVZ datasheet, ISL91302B40-EVZ pinout, ISL91302B40-EVZ application, or ISL91302B40-EVZ equivalent, this page provides verified configuration details, 4-phase single-output reference design guidance, thermal and telemetry interface support, and OEM supply chain readiness for portable SoC power delivery validation.

Technical Context

The ISL91302B40-EVZ implements a factory OTP-configured 4+0 phase topology-assigning all four integrated power stages (PH_A, PH_B, PH_C, PH_D) to a single synchronous buck output (VOUT1), with VOUT2 and RTN2 tied to PGND. It leverages Renesas' proprietary R5 modulator for seamless DCM/CCM transitions, no external compensation, and robust loop stability under dynamic load steps up to 50A/µs.

Configuration is managed via SPI/I²C (up to 26MHz/3.4MHz), with integrated 10-bit ADC telemetry for voltage, current, and temperature monitoring. Dynamic Voltage Scaling (DVS) supports ±3mV/µs slew rate control across 0.3–2.0V output range, and fault protection includes UV/OV/OC/OT with ±35mV OVP/UVP accuracy and 140°C thermal shutdown.

Key Specifications

Availability

ISL91302B40-EVZ is available at Aetrix Electronics and suitable for smartphone SoC validation, FPGA core power prototyping, and industrial MPU power architecture development requiring stable component supply and pre-validated 4-phase buck reference designs.

Supply support for ISL91302B40-EVZ 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 specializing in microcontrollers, analog, power management, and SoC solutions for automotive, industrial, and consumer markets.

The ISL91302B product line delivers highly configurable, high-efficiency multiphase buck PMICs targeting mobile and portable applications where compact size, fast transient response, and flexible output configurations (4+0, 3+1, 2+2) are critical for CPU/GPU/FPGA core power delivery.

FAQ

What is the primary function of the ISL91302B40-EVZ evaluation board?

The ISL91302B40-EVZ is a Renesas-provided evaluation platform specifically configured to demonstrate the ISL91302B PMIC in its 4+0 phase mode-using all four integrated power stages to deliver a single high-current output rail. It enables engineers to validate layout, thermal performance, transient response, and firmware integration for 4-phase buck applications before final PCB spin. The ISL91302B40-EVZ includes test points, jumpers, and documented schematics aligned with the ISL91302B datasheet Rev.3.01.

Does the ISL91302B40-EVZ support dual-output operation?

No-the ISL91302B40-EVZ is factory-configured and hardware-wired exclusively for 4+0 phase operation: all four power stages (PH_A–PH_D) drive VOUT1, while VOUT2 and RTN2 are connected to PGND. Dual-output (2+2 or 3+1) functionality requires either the ISL91302B22-EVZ or ISL91302B31-EVZ boards. The ISL91302B40-EVZ does not support runtime reconfiguration to dual-output modes without hardware modification.

What input voltage range and output voltage range does the ISL91302B40-EVZ support?

The ISL91302B40-EVZ supports 2.5V–5.5V input on AVIN and PVIN rails, consistent with the ISL91302B's operational limits. Its configured 4-phase output (VOUT1) is programmable from 0.3V to 2.0V in 1.2–2.0mV steps via I²C/SPI, with ±0.7% system accuracy using remote sensing. Output voltage is set by OTP and register writes-not fixed by board components-allowing full flexibility within the ISL91302B's specified range.

Can the ISL91302B40-EVZ be used to evaluate Dynamic Voltage Scaling (DVS)?

Yes-the ISL91302B40-EVZ fully supports DVS with selectable slew rates up to ±3mV/µs, as confirmed in the ISL91302B datasheet Figure 17–18. DVS is implemented via dedicated MPIO/GPIO pins (configurable per Table 2) or register-based commands over I²C/SPI. The ISL91302B40-EVZ includes accessible test points and GPIO headers to monitor and control DVS timing, making it suitable for validating voltage transition behavior in mobile SoC power sequencing.

What thermal and telemetry capabilities are accessible on the ISL91302B40-EVZ?

The ISL91302B40-EVZ exposes the ISL91302B's integrated 10-bit ADC telemetry: chip temperature sensor, auxiliary ADC inputs (ADC_IN0/ADC_IN1), and current/voltage sensing with ±75mA offset and ±10% accuracy. Thermal warning (85°C) and shutdown (140°C) thresholds are factory-programmed and readable via registers. All telemetry data is accessible through the board's I²C/SPI interface and documented in the ISL91302B datasheet Section 5.4 and Register Map.