ISL9440CIRZ-T

Overview

The ISL9440CIRZ-T is a quad-output power management integrated circuit manufactured by Renesas Electronics Corporation. It integrates three synchronous buck controllers and one low-dropout linear regulator (LDO). The device operates within a supply voltage range of 4.5V to 24V and features a switching frequency of 600kHz. It is housed in a 32-QFN package with dimensions of 5x5 mm, designed for surface mount installation. The component supports an operating temperature range from -40°C to 85°C.

Feature Summary

• Integrates three PWM synchronous buck controllers and one LDO in a single package
• Supports wide input voltage operation up to 24V
• Utilizes a compact 32-pin QFN footprint for space-constrained designs

Applications

• Industrial control systems
• Automotive electronics
• General-purpose embedded power distribution

Procurement Notes

Verify the specific suffix 'C' against the official datasheet to confirm electrical characteristics and pinout compatibility. Confirm current availability status as previous variants may be discontinued. Ensure the ordering part number matches the required tape-and-reel packaging format. Cross-reference the manufacturer's latest product change notices for any recent design or labeling updates.

Selection Notes

Select this component when a combined solution for multiple step-down conversions and a linear regulation path is required. The integration reduces external component count compared to discrete solutions. Evaluate thermal performance requirements given the high density of regulators in the 32-QFN package. Verify that the 600kHz switching frequency aligns with electromagnetic interference constraints of the target application.

Part Context

This part belongs to the ISL9440 family of quad-output PMICs. Variants such as ISL9440AIRZ-T and ISL9440B differ in specific electrical parameters or qualification levels. The 'C' suffix typically denotes a specific revision or grade within the Renesas portfolio. These devices are commonly used in applications requiring efficient multi-rail power generation from a single intermediate bus voltage.

Replacement Considerations

Direct substitutes include other ISL9440 family members like ISL9440BIRZ-T or ISL9441 series parts, provided pinouts and electrical specs match. Verify functional equivalence before replacing discontinued stock.