LT3973EDD-5#PBF

Overview

The LT3973EDD-5#PBF is a monolithic buck switching regulator manufactured by Analog Devices Inc. It features a wide input voltage range from 4.2V to 42V and delivers an output current of 750mA. The device provides a fixed 5V output with adjustable switching frequencies up to 2.15MHz. It operates within a junction temperature range of -40°C to +125°C and consumes only 2.5µA of quiescent current. Packaged in a 10-DFN exposed pad, it includes under-voltage lockout for reliable operation.

Feature Summary

• Integrates a high-efficiency synchronous buck converter topology capable of handling wide input voltage ranges.
• Features ultra-low quiescent current consumption to maximize efficiency during light-load or standby conditions.
• Includes built-in under-voltage lockout protection to ensure stable startup and prevent malfunction during low input states.

Applications

• Automotive electronics systems requiring robust power regulation
• Industrial equipment power distribution networks
• Embedded computing platforms needing efficient step-down conversion
• Battery-powered devices requiring extended operational life

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS standards when ordering. Confirm that the DFN-10 package matches your PCB footprint requirements. Ensure the fixed 5V output aligns with your system design needs, as this variant does not support external adjustment. Check availability through authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when a fixed 5V output is required alongside a wide input voltage capability up to 42V. It is suitable for designs prioritizing low static current and compact form factors due to the small DFN package. Consider the 750mA output limit to ensure it meets the load requirements of the target application without exceeding thermal limits.

Part Context

This part belongs to the LT3973 family of adjustable frequency buck regulators. Variants such as LT3973IDD and LT3973HDD offer different output voltages or pin configurations. The LT3973EDD-5#PBF specifically provides a fixed 5V output, distinguishing it from adjustable versions. It shares core architecture with other members but differs in output specification and thermal performance characteristics.

Replacement Considerations

Direct substitutes include other LT3973 variants like LT3973EDD or LT3973HDD if output voltage flexibility is needed. Cross-reference with similar Analog Devices buck converters offering comparable input ranges and current capabilities. Verify pin compatibility and thermal dissipation requirements before swapping parts in existing designs.