Renesas ISL28023FR60Z

Overview

ISL28023FR60Z from Renesas Electronics is a precision bidirectional digital power monitor IC for high-side and low-side current/voltage sensing with PMBus/I²C interface. It delivers 0.05% voltage and current gain accuracy, supports 0V–60V bus voltage range, integrates an 8-bit margining DAC, and operates across –40°C to +125°C for telecom and industrial DC/DC converter monitoring.

For engineers reviewing the ISL28023FR60Z datasheet, ISL28023FR60Z pinout, ISL28023FR60Z application, or ISL28023FR60Z equivalent, key selection criteria include its 60V common-mode input capability, dual-channel (primary + auxiliary) 16-bit ΔΣ ADC architecture, fast 500ns fault detection, internal 3.3V regulator, and space-constrained 24-lead QFN package.

Technical Context

The ISL28023FR60Z implements a 16-bit delta-sigma ADC with programmable averaging (up to 128 samples), enabling precise measurement of shunt voltage (±81.91mV full-scale) and bus voltage (0–60V) with 2.5µV and 1mV LSB steps respectively. Its dual-path analog front-end supports simultaneous primary and auxiliary channel operation.

It features integrated threshold detectors for overvoltage, undervoltage, and overcurrent faults with 500ns response time, plus an 8-bit DAC (0.055V–2×V_MS) for DC/DC output voltage margining. The device uses a PMBus-compatible I²C/SMBus interface operating down to 1.2V I2CVCC supply and includes internal temperature sensing with ±1.0°C accuracy at +25°C.

Key Specifications

Pinout & Package

ISL28023FR60Z is housed in a RoHS-compliant 24-lead QFN package (4mm × 4mm) with exposed thermal pad. The package supports reflow per JEDEC J-STD-020 and has θ_JA = 38°C/W and θ_JC = 2.5°C/W for efficient heat dissipation in high-density power modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital power monitor applications.

Compared with ISL28023FR12Z and INA226AIDGST, the ISL28023FR60Z uniquely combines 60V bus monitoring, integrated 8-bit margining DAC, and internal 3.3V regulator in a single 24-pin QFN-reducing component count and layout complexity for high-voltage industrial and telecom power systems.

Availability

ISL28023FR60Z is available at Aetrix Electronics and suitable for data center server power, telecom 48V distribution, and industrial DC/DC converter applications requiring stable component supply and long-term lifecycle support.

Supply support for ISL28023FR60Z 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 devices, and embedded solutions for automotive, industrial, and infrastructure markets.

The ISL28023 belongs to Renesas' Digital Power Monitor (DPM) portfolio, designed specifically for high-accuracy, multi-rail power telemetry and closed-loop voltage margining in mission-critical power systems.

FAQ

What is the maximum common-mode voltage supported by the ISL28023FR60Z?

The ISL28023FR60Z supports a maximum common-mode input voltage of 60V on the VBUS pin and up to 63V absolute maximum rating. This is explicitly specified for the FR60Z variant in the Ordering Information table and Absolute Maximum Ratings section of the FN8389 datasheet. The device achieves this using a dedicated high-voltage input stage that maintains 0.05% gain accuracy across the full 0–60V range, making it suitable for telecom and industrial 48V systems without external attenuation.

Does the ISL28023FR60Z require an external voltage regulator?

No, the ISL28023FR60Z does not require an external voltage regulator because it integrates an internal 3.3V regulator. The VREG_IN pin accepts 4.5–60V input, and VREG_OUT delivers a regulated 3.3V ±3.5% output capable of sourcing up to 6mA. This eliminates the need for an external LDO when powering the ISL28023FR60Z from a high-voltage rail, simplifying power design and reducing bill-of-materials cost in applications like 48V telecom power distribution.

How does the ISL28023FR60Z handle overcurrent fault detection?

The ISL28023FR60Z implements hardware-accelerated overcurrent detection with a 500ns response time. It compares the primary shunt voltage (VINP–VINM) against programmable thresholds stored in internal DAC registers. When exceeded, it asserts SMBALERT1 and/or SMBALERT2 within 500ns-bypassing the ADC conversion pipeline and firmware polling. This deterministic, cycle-accurate response enables immediate system shutdown before MOSFET or inductor damage occurs in high-power DC/DC converters.

Can the ISL28023FR60Z monitor two independent power rails simultaneously?

Yes, the ISL28023FR60Z can monitor two independent power rails simultaneously using its primary and auxiliary channels. The primary channel measures high-side current and bus voltage (0–60V), while the auxiliary channel supports either differential shunt sensing (AUXP/AUXM) or single-ended voltage sensing (AUXV) up to VCC. Both channels operate concurrently with independent averaging, gain, and offset calibration registers, enabling coordinated monitoring of main and auxiliary rails in multi-output power supplies.

What is the function of the DAC_OUT pin on the ISL28023FR60Z?

The DAC_OUT pin on the ISL28023FR60Z is an 8-bit voltage output DAC used for DC/DC converter output voltage margining. It generates a precision voltage (0.055V to 2×V_MS, where V_MS is selectable from 0.4V to 1.2V) that injects into the feedback network of a DC/DC controller to raise or lower the output voltage by ±5%. This enables production testing, field calibration, and adaptive regulation without modifying hardware, and is fully controllable via PMBus WRITE_VOUT_MARGIN_HIGH/LOW commands.