ISL6440IAZ-T7

DC DC Switching Controllers Overview

The ISL6440IAZ-T7 is a dual PWM controller with an integrated linear controller, designed for synchronous buck DC-DC switching applications. It operates at a fixed switching frequency of 300 kHz and supports a maximum duty cycle of 93%. The device accepts a supply voltage range of 4.5 V to 24 V and provides two output stages with a drive current capability of 60 mA. It features soft-start functionality and is housed in a 24-QSOP surface-mount package, suitable for industrial environments operating between -40°C and +85°C.

DC DC Switching Controllers Feature Summary

• Dual PWM architecture combined with a linear controller for versatile power management
• Integrated synchronous rectification control for improved efficiency
• Built-in soft-start mechanism to limit inrush current during startup

DC DC Switching Controllers Applications

• Industrial control systems requiring multi-rail power distribution
• Telecommunications infrastructure power supplies
• Embedded computing platforms needing synchronized buck regulation

DC DC Switching Controllers Procurement Notes

This component has reached end-of-life status and is no longer manufactured by Renesas Electronics Corporation. Verification of availability should focus on authorized distributors holding remaining stock or approved replacement parts. Buyers must confirm the specific suffix variants and ensure compliance with RoHS3 standards before procurement, as original production lines are closed.

DC DC Switching Controllers Selection Notes

Engineers selecting this part should consider its fixed 300 kHz switching frequency and 24-V maximum input voltage when designing power stages. The dual PWM configuration allows for independent channel control, while the integrated linear regulator offers auxiliary low-noise power. Designers must account for the 24-QSOP thermal characteristics and ensure adequate PCB layout for high-current synchronous paths.

DC DC Switching Controllers Part Context

The ISL6440 belongs to the Intersil/Renesas portfolio of mixed-signal power management ICs. It was widely used in applications requiring compact, high-efficiency power solutions. As a legacy product, it represents earlier generations of integrated controller technology that combined switching and linear regulation capabilities in a single package.

DC DC Switching Controllers Replacement Considerations

The ISL81802FRTZ-T7 is a confirmed public substitute for this discontinued component. Engineers should verify pin compatibility and electrical specifications against the new part datasheet before implementation.

DC DC Switching Controllers FAQ

Does the ISL6440IAZ-T7 support clock synchronization?

No, the official specifications indicate that clock synchronization is not supported for this component.

What is the maximum duty cycle achievable with this controller?

The device supports a maximum duty cycle of 93% for its PWM outputs.