EL7563CMZ

Overview

The EL7563CMZ is a monolithic 4 Amp DC/DC step-down regulator manufactured by Elantec. It features integrated synchronous MOSFETs and a current mode controller, delivering up to 95% efficiency. The device operates with an input voltage range of 3V to 3.6V and provides an adjustable output voltage from 1.0V to 2.5V. It utilizes patented on-chip resistorless current sensing for cycle-by-cycle current limiting and over-current protection. The component supports external synchronization up to 1MHz switching frequency and includes internal soft-start, over-voltage protection, and under-voltage lockout.

Feature Summary

• Integrated synchronous MOSFETs and current mode controller
• Patented on-chip resistorless current sensing
• Power tracking for multiple supply start-up sequencing
• Junction temperature indicator for thermal monitoring

Applications

• Desktop power supplies
• Portable electronic applications
• Multiple converter systems requiring start-up sequencing

Procurement Notes

Verify the manufacturer designation carefully, as Intersil Corporation is the primary source for the EL7563 datasheet documentation. Confirm that the CMZ suffix corresponds to the 20-pin SO package variant. Ensure compliance requirements match the specific revision, noting that Pb-Free versions are RoHS compliant. Cross-reference the part number with official distributor catalogs to confirm availability and authenticity before procurement.

Selection Notes

Select this component for designs requiring high efficiency and compact solutions due to minimal external components. The adjustable output voltage range suits low-voltage digital loads. Consider the 3V to 3.6V input constraint when designing power stages. The integration of synchronous rectification reduces heat generation compared to non-synchronous alternatives, making it suitable for space-constrained portable applications.

Part Context

The EL7563 series belongs to the family of monolithic synchronous step-down regulators designed for high-performance power management. These devices combine power and control functions into a single IC to simplify design and reduce board space. The EL7563 specifically targets applications needing reliable 4A output with precise regulation and advanced protection features like thermal monitoring and power tracking.

Replacement Considerations

Check for direct substitutes within the Intersil/Renesas portfolio or compatible pin-to-pin replacements from other manufacturers offering similar 4A synchronous buck specifications. Verify that alternative parts support the same 3V-3.6V input range and 1.0V-2.5V output adjustment capabilities.