ISL6446IAZ-T7

Overview

The ISL6446IAZ-T7 is a triple-output power management controller manufactured by Renesas Electronics Corporation, housed in a 24-QSOP surface-mount package. It integrates two synchronous buck PWM controllers and one linear regulator (LDO) controller to provide a compact power solution for broadband, DSL, and networking applications. The device operates with a supply voltage range of 4.5V to 5.5V and features synchronized 180-degree out-of-phase operation for the two PWM channels to reduce input ripple. The switching frequency is programmable from 100kHz up to 2.5MHz, allowing optimization for cost or size. The linear output provides low-current regulation, while the PWM outputs support precise voltage regulation down to 0.6V with ±1.5% tolerance.

Feature Summary

• Integrates dual synchronous buck PWM controllers and a single linear regulator controller within one IC
• Features synchronized 180-degree out-of-phase operation to minimize input voltage ripple and RMS current
• Includes robust protection mechanisms such as adjustable overcurrent protection with 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 distributors or direct manufacturer channels due to potential counterfeit risks. Confirm RoHS compliance status and moisture sensitivity level (MSL 3) requirements prior to assembly. Ensure proper handling procedures are followed to prevent electrostatic discharge damage during storage and installation processes.

Selection Notes

Select this controller when designing systems requiring simultaneous high-current DC/DC conversion and low-noise LDO regulation from a single 5V rail. The integrated phase-skewing feature simplifies input filter design compared to asynchronous alternatives. Consider the programmable frequency range to balance efficiency against passive component size constraints for specific form factors.

Part Context

This component belongs to the ISL6446 series of power management ICs designed for multi-rail power architectures. It serves as a central control unit for generating multiple voltage levels required by complex digital logic families. The QSOP-24 package offers a compact footprint suitable for dense PCB layouts common in modern communication equipment and computing hardware.

Replacement Considerations

Public confirmed substitute part numbers include ISL6442IAZ and ISL6446AIAZ.