ISL6439IB

DC DC Switching Controllers Overview

The ISL6439IB is a synchronous buck DC-DC switching controller manufactured by Renesas Electronics Corporation. It operates with a fixed switching frequency of 600 kHz and supports a maximum duty cycle of 100%. The device provides a single positive output configured for step-down voltage regulation. It requires a supply voltage (Vcc/Vdd) ranging from 2.97 V to 3.63 V. The component is housed in a 16-VQFN package with a bare pad, measuring 5x5 mm, designed for surface mount installation. It functions within an ambient operating temperature range of -40°C to +85°C.

DC DC Switching Controllers Feature Summary

• Integrated synchronous rectification for improved efficiency
• Fixed 600 kHz switching frequency operation
• Supports 100% maximum duty cycle capability
• Includes enable and phase control features

DC DC Switching Controllers Applications

• Point-of-load voltage regulation
• General purpose DC-DC conversion systems
• Embedded power management circuits

DC DC Switching Controllers Procurement Notes

Verify the specific suffix configuration against official datasheets, as variations exist between QFN and SOIC packages within the ISL6439 family. Confirm current availability status, as certain variants may be discontinued or subject to last-time buy notices. Ensure compatibility with required thermal dissipation standards for the selected package type during integration planning.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring a compact synchronous buck solution with a fixed high-frequency operation. The 16-QFN package suits space-constrained designs. Verify that the input voltage source can support the required 2.97 V to 3.63 V supply range for the IC core. Consider thermal performance requirements given the small footprint and power handling capabilities inherent to this topology.

DC DC Switching Controllers Part Context

The ISL6439 series belongs to Renesas' portfolio of power management integrated circuits, specifically targeting efficient voltage regulation. This part represents the Intersil heritage acquired by Renesas, maintaining established specifications for industrial and commercial electronics. It serves as a fundamental building block for converting higher bus voltages to lower logic levels in modern electronic systems.

DC DC Switching Controllers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official cross-reference guides or contact manufacturer support for validated alternatives.