ISL6549IAZ-T

Overview

The ISL6549IAZ-T is a dual-output power management integrated circuit manufactured by Intersil, housed in a 14-SOIC package. It combines a synchronous step-down (buck) controller with a linear low-dropout regulator (LDO). The switching section operates at a frequency range of 150kHz to 1MHz and accepts an input supply voltage between 4.75V and 5.25V. Designed for industrial applications, the device functions within an operating temperature range of 0°C to 70°C.

Feature Summary

• Integrates a synchronous buck controller and a linear LDO into a single component
• Provides two independent regulated output channels
• Supports adjustable switching frequencies from 150kHz to 1MHz

Applications

• Industrial control systems requiring mixed regulation topologies
• Embedded processor power supply architectures
• General-purpose DC-DC conversion circuits

Procurement Notes

Verify the specific suffix 'IAZ' against official manufacturer documentation to confirm the exact temperature grade and annealing specifications. Ensure that the 14-SOIC package dimensions align with the target PCB footprint. Cross-reference the lead time and availability status directly with authorized distributors, as stock levels fluctuate. Confirm that the 4.75V to 5.25V input range matches the system power rail before finalizing the procurement order.

Selection Notes

Select this component when a design requires both high-efficiency switching regulation and precise linear regulation within a compact form factor. The wide switching frequency range allows optimization for either size or noise performance. Verify that the thermal requirements of the SOIC package are sufficient for the expected load current. Consider the 0°C to 70°C industrial temperature rating to ensure reliability under standard operating conditions.

Part Context

The ISL6549 belongs to the broader family of PMIC solutions designed for complex power distribution networks. It addresses scenarios where multiple voltage rails are needed but space constraints prevent separate discrete controllers. The integration of buck and LDO technologies simplifies bill-of-materials management while maintaining distinct regulation characteristics for sensitive analog and digital loads.

Replacement Considerations

Consult official datasheets for cross-reference candidates such as the ISL6549CB-T. Verify pin compatibility and electrical parameter equivalence before substitution. Ensure that any alternative part number maintains the same 14-SOIC package outline and functional topology.