EL7515IY

Overview

The EL7515IY is a monolithic synchronous step-down switching regulator manufactured by Intersil, now part of Renesas Electronics. It integrates high-side and low-side power MOSFETs to deliver up to 2A of output current from an input voltage range of 2.5V to 5.5V. The device operates at a fixed internal switching frequency of 1.6MHz, enabling the use of small external components. It features adjustable output voltages starting from 0.8V via an external resistor divider. Key protection mechanisms include cycle-by-cycle current limiting, thermal shutdown, and a power-good indicator. The component is housed in a compact 10-pin MSOP package suitable for space-constrained designs.

Feature Summary

• Integrates synchronous rectification with internal high-side and low-side MOSFETs for high efficiency
• Fixed 1.6MHz switching frequency minimizes external passive component size
• Includes comprehensive protection against over-temperature conditions and output short circuits

Applications

• Portable electronics powered by single-cell lithium-ion batteries
• Point-of-load regulation for digital signal processors and microcontrollers
• Battery-powered communication equipment requiring efficient DC-DC conversion

Procurement Notes

Verify current availability status as Intersil products are managed under Renesas Electronics. Confirm package integrity and authenticity through authorized distributors. Check for product change notifications regarding manufacturing site transfers or packaging updates. Ensure compliance with RoHS directives if required for the specific application environment.

Selection Notes

Select this component when a compact solution is needed for converting 3.3V or 5V rails to lower logic voltages. The fixed frequency operation simplifies filter design compared to variable frequency controllers. Consider the thermal performance of the MSOP package for high ambient temperatures. Verify that the required output voltage falls within the supported range of the internal reference.

Part Context

This regulator belongs to the EL75xx series of synchronous buck converters designed for portable applications. The series emphasizes high integration and small footprint. Intersil was acquired by Renesas Electronics, which continues to support these legacy analog products. The technology focuses on combining power switches with control logic to reduce board space.

Replacement Considerations

Consult Renesas official documentation for direct pin-compatible replacements or updated equivalents within the RA or ISL families. Verify electrical parameters such as switching frequency and output current capability before substitution.