ISL78268ARZ

DC DC Switching Controllers Overview

The ISL78268ARZ is a Grade 1 automotive synchronous buck controller with integrated high/low-side MOSFET drivers. It supports an input voltage range of 5V to 55V, withstanding up to 60V non-switching. The device features peak current mode control with adjustable slope compensation and selectable diode emulation for light load efficiency. Integrated drivers supply 2A sourcing and 3A sinking current. Switching frequency is adjustable from 50kHz to 1.1MHz or externally synchronized. It includes average current regulation for constant current applications. Protection features include input/output OVP, cycle-by-cycle current limiting, average current OCP, and OTP.

DC DC Switching Controllers Feature Summary

• Integrated adaptive dead-time control drivers capable of supporting power stages from under 1A to over 25A
• Dedicated average output current modulation loop for constant current applications such as battery charging
• Selectable hiccup or latch-off fault response modes for robust system protection

DC DC Switching Controllers Applications

• Battery charging systems requiring constant current regulation
• Super-capacitor charging circuits
• Temperature control systems demanding precise current limits
• Automotive grade DC-DC conversion modules

DC DC Switching Controllers Procurement Notes

Verify the specific suffix ARZ-T7A if tape-and-reel packaging is required, as the base part number may indicate tube packaging. Confirm AEC-Q100 qualification status for automotive compliance. Ensure the 24-Ld 4x4 QFN package matches the PCB footprint design. Check RoHS compliance documentation for environmental regulations.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring wide input voltage ranges up to 55V and high efficiency at light loads via diode emulation. The integrated driver simplifies design by eliminating external gate drive components. Consider the adjustable frequency range for optimizing component size versus switching losses. Verify thermal performance requirements given the fully synchronous architecture.

DC DC Switching Controllers Part Context

The ISL78268 belongs to Renesas' automotive-grade synchronous buck controller family. It is designed for high-efficiency power conversion in demanding environments. The device integrates control logic and drivers into a compact QFN package. It complements other power management solutions by offering advanced current regulation features suitable for specialized loads.

DC DC Switching Controllers Replacement Considerations

Consult official substitution lists for equivalent automotive buck controllers. Verify pin compatibility and electrical specifications before replacing. Ensure the alternative device meets AEC-Q100 Grade 1 requirements. Check for any changes in driver current capabilities or protection feature sets.