ISL6446AIAZ

Overview

The ISL6446AIAZ is a triple-output power management IC featuring two synchronous buck PWM controllers and one linear regulator. It operates with a supply voltage range of 4.5V to 5.5V and supports switching frequencies from 100kHz to 2.6MHz. The device utilizes synchronized 180-degree out-of-phase operation for the PWM outputs to reduce input ripple. It provides precise voltage regulation down to 0.6V with ±1.5% tolerance. The component is housed in a 24-QSOP package and functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates dual synchronous buck PWM controllers and a single linear regulator for comprehensive power management.
• Employs synchronized 180-degree out-of-phase operation to substantially reduce input voltage ripple and RMS current.
• Includes robust protection features such as adjustable overcurrent protection, latch-off mode, and thermal shutdown at +150°C.

Applications

• ATX power supplies
• DSP, ASIC, and FPGA point-of-load regulation
• Industrial and security networking applications

Procurement Notes

Verify component authenticity through authorized channels due to End-of-Life status. Confirm package integrity and moisture sensitivity level handling procedures before assembly. Cross-reference datasheet revisions to ensure compatibility with existing design specifications. Validate that the specific suffix matches the required pinout and electrical characteristics.

Selection Notes

Select this component for designs requiring integrated dual synchronous buck and linear regulation in a compact form factor. Consider the wide switching frequency range for optimizing efficiency versus size trade-offs. Ensure input voltage requirements align with the specified 4.5V to 5.5V range. Evaluate thermal performance given the high-temperature shutdown threshold and operating limits.

Part Context

The ISL6446 series is designed for broadband, DSL, and networking applications. It serves as a high-performance solution by integrating complete control, monitoring, and protection functions. The device simplifies system design by combining multiple converter types into a single monolithic package, reducing component count and board space.

Replacement Considerations

The part is officially discontinued. Verify availability of direct substitutes or alternative Renesas PMICs with similar topology and output configurations. Check for pin-to-pin compatibility if replacing in existing layouts.