ISL95870IRUZ-T

Special Purpose Regulators Overview

The ISL95870IRUZ-T is a single-phase synchronous buck PWM DC/DC controller designed for portable GPU core voltage regulation. It features Intersil’s proprietary R4 modulator technology, offering fast transient response and high light-load efficiency. The device operates with an input voltage range of 3.3V to 25V and provides an output voltage range of 500mV to 5V. It supports selectable switching frequencies of 300kHz, 500kHz, 600kHz, or 1MHz in continuous conduction mode. The controller includes integrated MOSFET drivers and a Schottky bootstrap diode, requiring few external components. It offers ±0.5% system accuracy over the operating temperature range of -10°C to +100°C.

Special Purpose Regulators Feature Summary

• Intersil's proprietary R4 Modulator Technology ensures equivalent light-load efficiency and faster transient performance compared to previous generations.
• Integrated MOSFET drivers and Schottky bootstrap diode allow for a highly compact regulator design with minimal external component count.
• Supports differential remote sensing for precise output voltage regulation and selectable switching frequencies for optimized efficiency.

Special Purpose Regulators Applications

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

Special Purpose Regulators Procurement Notes

Verify the specific suffix 'IRUZ' against the manufacturer datasheet to confirm package type and tape/reel specifications. Check current lifecycle status as this series may be subject to obsolescence notices. Ensure compatibility with required VID logic inputs if dynamic setpoint selection is needed for the target application design.

Special Purpose Regulators Selection Notes

Select this component when a single-phase solution is sufficient for low-power GPU or notebook applications. Consider the R4 modulator benefits for designs prioritizing transient response and light-load efficiency. Evaluate the need for 2-bit VID inputs versus simple resistor programming based on system complexity and cost constraints.

Special Purpose Regulators Part Context

The ISL95870 belongs to the Intersil (now Renesas) portfolio of PWM controllers specifically tailored for portable computing graphics processing units. It represents a transition from older R3 modulator technologies, offering improved internal compensation and driver integration. This family focuses on reducing board space while maintaining high precision for sensitive digital loads.

Special Purpose Regulators Replacement Considerations

Direct replacements include the ISL95870A and ISL95870B variants, which offer similar functionality but may differ in VID configuration options. Verify pinout and feature parity before substitution. Cross-reference with newer Renesas PMIC families if available, though direct functional equivalents may require circuit redesign.