ISL95870BHRZ-TR5673

Special Purpose Regulators Overview

The ISL95870BHRZ-TR5673 is a single-phase synchronous-buck PWM regulator from the Robust Ripple Regulator (R3) series, designed for GPU core voltage regulation. It operates with an input voltage range of 3.3V to 25V and provides a programmable output voltage between 0.5V and 5V. The device supports a switching frequency selection of 300 kHz, 500 kHz, 600 kHz, or 1 MHz in continuous conduction mode. It features 2-bit VID inputs allowing four independent setpoint voltages and includes automatic diode emulation for high efficiency. The component is housed in a 20-VFQFN package with exposed pad and functions within a temperature range of -10°C to +100°C.

Special Purpose Regulators Feature Summary

• Integrates Intersil's proprietary R4 modulator technology for optimized transient response and accurate frequency control.
• Features differential remote sensing to ensure precise output voltage regulation at the load point.
• Includes integrated MOSFET drivers and Schottky bootstrap diode to minimize external component count.
• Provides power-good monitoring for soft-start sequencing and fault detection capabilities.

Special Purpose Regulators Applications

• GPU core voltage regulators
• Portable computing systems
• Battery-powered AC-adapter powered systems

Special Purpose Regulators Procurement Notes

Verify the specific suffix TR5673 against official Renesas documentation to confirm tape-and-reel specifications and packaging details. Ensure compatibility with existing PCB footprints for the 20-QFN(3x4) package. Confirm that the 2-bit VID configuration matches the target system requirements. Check for any recent product change notifications regarding manufacturing origin or material composition updates.

Special Purpose Regulators Selection Notes

Select this controller when a single-phase solution with flexible VID programming is required for portable GPU applications. The wide input voltage range accommodates various battery and adapter configurations. Consider the selectable switching frequencies to balance efficiency and component size. Verify that the thermal performance of the 20-VFQFN package meets the system's heat dissipation needs under maximum load conditions.

Special Purpose Regulators Part Context

The ISL95870 series belongs to Renesas' portfolio of power management ICs derived from Intersil technology. It is part of the broader family of synchronous buck controllers designed for high-performance computing. The device leverages advanced modulation techniques to improve light-load efficiency while maintaining fast transient response times compared to previous generations.

Special Purpose Regulators Replacement Considerations

Check for direct cross-reference part numbers such as ISL95870HRUZ-T or ISL95870BHRZ-T in distributor databases. Verify pinout compatibility and electrical parameter equivalence before substitution. Note that older variants may have different packaging or lead-free status requirements.