LT3579EFE

Overview

The LT3579EFE is a monolithic switching regulator designed for boost, inverting, and SEPIC DC/DC converter applications. It integrates a high-voltage NPN power transistor capable of handling up to 6A switch current with a 42V breakdown voltage. The device features an adjustable switching frequency ranging from 200kHz to 2.5MHz, allowing optimization for efficiency or component size. It includes programmable soft-start, cycle-by-cycle current limiting, and thermal shutdown protection. The output voltage is adjustable via external resistors, supporting positive or negative regulation configurations.

Feature Summary

• Integrates a high-voltage NPN power transistor for robust boost and inverting topologies
• Supports flexible switching frequency adjustment to balance efficiency and passive component size
• Includes comprehensive protection mechanisms such as cycle-by-cycle current limiting and thermal shutdown

Applications

• Industrial control systems requiring isolated or non-isolated power conversion
• Automotive electronics utilizing wide input voltage ranges
• Telecommunications infrastructure needing reliable DC/DC step-up or inversion

Procurement Notes

Verify the specific suffix (EFE) against the manufacturer's official datasheet to confirm package type and temperature range. Ensure compatibility with required operating conditions before integration. Cross-reference ordering information directly with Analog Devices documentation to avoid discrepancies in part identification.

Selection Notes

Select this component when designing boost or inverting converters requiring integrated high-current switching capability. Consider the adjustable frequency range for optimizing magnetic component size. Evaluate thermal performance requirements based on the intended load current and ambient operating conditions.

Part Context

This device belongs to the LT3579 family of monolithic switching regulators. It is distinct from synchronous buck converters and linear regulators. The part is specifically engineered for applications demanding high input voltages and significant output currents in compact form factors.

Replacement Considerations

Consult official substitution guides for equivalent parts within the same product family. Verify pinout compatibility and electrical specifications before replacing existing designs.