LT3581HDE#PBF

Overview

The LT3581HDE#PBF is a monolithic step-down switching regulator manufactured by Analog Devices Inc. It integrates a high-voltage N-channel power switch and operates from input voltages up to 60V. The device delivers output currents up to 2A with an adjustable output voltage range of 1.225V to 40V. Key electrical parameters include a quiescent current of 1.5mA, a switching frequency selectable at 500kHz or 1MHz, and a shutdown supply current of less than 1µA. It features thermal foldback protection and is housed in a thermally enhanced 16-lead DFN package.

Feature Summary

• Integrates a high-voltage N-channel power switch for simplified design
• Supports selectable switching frequencies of 500kHz or 1MHz
• Includes thermal foldback protection to limit junction temperature
• Enables low-power shutdown mode with minimal supply current

Applications

• Industrial point-of-load regulation
• Automotive systems operating within wide input voltage ranges
• Distributed power architectures requiring high efficiency
• Battery-powered equipment needing extended runtime

Procurement Notes

Verify the specific suffix against the manufacturer's official datasheet to confirm pinout compatibility and environmental ratings. Ensure the ordering part number matches the exact package variant required for your PCB footprint. Cross-reference the manufacturer's latest documentation to validate any recent product change notifications or lifecycle status updates before finalizing procurement.

Selection Notes

Select this component when designing systems that require a robust solution for high-input voltage applications without external discrete switches. Consider the thermal performance requirements based on the expected load current and ambient temperature conditions. Evaluate the need for the specific switching frequency option to optimize inductor size versus electromagnetic interference constraints in the target application environment.

Part Context

This component belongs to the LT3581 family of high-voltage step-down regulators designed by Linear Technology, now part of Analog Devices. The series is engineered for applications demanding high efficiency and compact board space. The HDE#PBF designation indicates a specific lead-free, RoHS-compliant package variant suitable for surface-mount assembly processes.

Replacement Considerations

LT3581IDE#PBF