ISL95808BW

Gate Driver Overview

The ISL95808BW is a high-frequency, low-power dual-channel half-bridge MOSFET gate driver manufactured by Renesas Electronics Corporation. Designed specifically for synchronous rectification in buck converters, it features non-inverting inputs and supports N-channel MOSFETs with a maximum high-side bootstrap voltage of 36 V. The device operates within a supply voltage range of 4.5 V to 5.5 V and delivers peak output currents of 2 A for both sourcing and sinking. It exhibits typical rise and fall times of 8 ns, enabling switching frequencies up to 2 MHz. The component is available in an 8-DFN package.

Gate Driver Feature Summary

• Integrates adaptive shoot-through protection to prevent simultaneous conduction of high-side and low-side switches, thereby reducing cross-conduction losses.
• Features diode emulation functionality that enters discontinuous conduction mode during light loads to enhance efficiency and supports monotonic startup under pre-biased output conditions.
• Includes internal bootstrap Schottky diodes to simplify external circuit design and reduce overall system cost.
• Supports three-state PWM input operation to prevent negative voltage outputs during CPU shutdown periods when used with multi-phase PWM controllers.

Gate Driver Applications

• Core voltage power supplies for Intel and AMD mobile processors
• High-frequency DC-DC converters
• Large current, low voltage regulation solutions

Gate Driver Procurement Notes

Verify the specific suffix and revision level against official Renesas documentation to ensure compatibility with target designs. Confirm end-of-life status and availability through authorized channels, as distribution data indicates potential discontinuation. Cross-reference pinout and thermal characteristics with the latest datasheet before finalizing procurement decisions.

Gate Driver Selection Notes

Select this component for applications requiring precise control of synchronous rectifier MOSFETs in compact form factors. Ensure the controller interface matches the non-inverting input requirement. Verify that the 36 V high-side voltage rating aligns with the power stage specifications. Consider the 8-DFN package constraints for thermal management and PCB layout requirements.

Gate Driver Part Context

The ISL95808 series belongs to Renesas' portfolio of specialized power management integrated circuits designed for mobile computing platforms. It complements other VRM components by providing efficient gate driving capabilities tailored for high-density power delivery systems. The device addresses the need for improved efficiency and reduced component count in modern processor power architectures.

Gate Driver Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult official Renesas resources or authorized distributors for qualified alternatives if this component is discontinued.