Renesas ISL62383HIEVAL1Z

Overview

ISL62383HIEVAL1Z from Renesas Electronics (formerly Intersil) is an evaluation board for the ISL62383 quad-output system power supply controller, designed to generate 3.3V/5V main rails and support LDO5 switchover in notebook computers. It implements two independent R3-controlled PWM regulators (0.6V–5.5V), fixed 5V LDO5, and operates from 5.5V–25V input across -10°C to +100°C.

For engineers reviewing the ISL62383HIEVAL1Z datasheet, ISL62383HIEVAL1Z pinout, ISL62383HIEVAL1Z application, or ISL62383HIEVAL1Z equivalent, this page delivers verified functional context, confirmed test circuit topology, supported input/output configurations, thermal performance data, and direct design integration guidance for battery-powered mobile platforms.

Technical Context

The ISL62383HIEVAL1Z implements the ISL62383 controller in a 28-lead 4×4 TQFN package with dual synchronous buck channels, integrated MOSFET drivers, bootstrap diodes, and programmable frequency via FSET1/FSET2 resistors. It supports R3 modulation with ±1% output voltage accuracy over temperature and features ultrasonic DCM mode (≥28kHz) to suppress audio-band noise.

Power-up sequencing is managed by digital soft-start, PGOOD1/PGOOD2 open-drain status outputs, and automatic SMPS2-to-LDO5 switchover at 4.8V threshold. Protection includes OVP/UVP/OCP/OTP with fault identification via PGOOD pull-down resistance and internal soft-stop output discharge.

Key Specifications

Availability

ISL62383HIEVAL1Z is available at Aetrix Electronics and suitable for notebook reference designs, battery-powered embedded systems, and portable computing platform validation requiring stable component supply, full documentation access, and pre-validated thermal and transient performance.

Supply support for ISL62383HIEVAL1Z 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 Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and computing applications.

The ISL62383HIEVAL1Z belongs to Renesas' notebook power management portfolio, engineered specifically to simplify high-efficiency, multi-rail power architecture development for mobile computing devices with stringent thermal and sequencing requirements.

FAQ

What is the primary function of the ISL62383HIEVAL1Z evaluation board?

The ISL62383HIEVAL1Z evaluation board demonstrates the ISL62383 controller's capability to generate dual synchronized buck outputs (e.g., 3.3V/5V) and manage automatic switchover between SMPS2 and the fixed 5V LDO5 rail. It provides validated schematics, layout, BOM, and test points for rapid integration into notebook and sub-notebook power designs. The board directly implements the ISL62383's R3 control scheme, soft-start sequencing, and protection logic as specified in FN6665 Rev 6.00.

Does the ISL62383HIEVAL1Z support LDO3 linear regulator functionality?

No, the ISL62383HIEVAL1Z does not support LDO3 functionality because it is based on the ISL62383 controller, which explicitly omits the LDO3 linear regulator present in ISL62381/ISL62382 variants. As confirmed in FN6665 Rev 6.00, the ISL62383 uses only two PWM channels and the fixed 5V LDO5, with SMPS2 automatically assuming the LDO5 load when programmed to 5V output - eliminating the need for LDO3.

What input voltage range and thermal specifications apply to the ISL62383HIEVAL1Z?

The ISL62383HIEVAL1Z supports an input voltage range of 5.5V to 25V, matching the ISL62383 controller's VIN specification and enabling operation from 3-cell or 4-cell Li+ batteries and AC adapters. Its thermal performance is defined by θJA = 37°C/W (28-lead 4×4 TQFN), with guaranteed operation across -10°C to +100°C ambient - validated per FN6665 Rev 6.00 Absolute Maximum and Recommended Operating Conditions tables.

How does the ISL62383HIEVAL1Z implement power-good signaling and fault detection?

The ISL62383HIEVAL1Z uses open-drain PGOOD1 and PGOOD2 outputs that go high-impedance when respective SMPS outputs are within regulation (±1%) and no faults are detected. Faults - including OVP, UVP, OCP, or OTP - pull PGOOD low with nominal impedance of 63Ω (OVP), 95Ω (UVP), or 32Ω (OCP/soft-start), enabling system-level fault identification without external logic. This behavior is fully implemented per FN6665 Rev 6.00 Electrical Specifications and Pin Descriptions.

Can the ISL62383HIEVAL1Z be used to evaluate ultrasonic discontinuous conduction mode (DCM)?

Yes, the ISL62383HIEVAL1Z supports ultrasonic DCM operation by floating the FCCM pin (Pin 3), which configures the ISL62383 controller to limit minimum switching frequency to approximately 28kHz - eliminating audible noise in sensitive audio-frequency applications. This mode is explicitly documented in FN6665 Rev 6.00 Features and Electrical Specifications, and the evaluation board provides direct access to FCCM for configuration.