LT1956EFE-5#PBF

Overview

The LT1956EFE-5#PBF is a monolithic buck switching regulator from Analog Devices, designed for high-voltage applications with an input range of 5.5V to 60V. It integrates a high-efficiency 1.5A power switch and operates at a fixed 500kHz switching frequency. The device delivers a regulated 5V output with a maximum current capability of 3A in automotive configurations. Utilizing current-mode architecture, it ensures fast transient response and loop stability. Key electrical parameters include a quiescent current of 25µA and an operating temperature range from -40°C to +125°C.

Feature Summary

• Integrates a high-efficiency 1.5A internal power switch within a single monolithic die.
• Employs current-mode control architecture to provide rapid transient response and stable loop performance.
• Supports wide input voltage ranges up to 60V, suitable for industrial and automotive bus systems.

Applications

• Automotive electronics requiring robust high-voltage step-down conversion
• Industrial power management systems utilizing 12V to 60V input rails
• Point-of-load regulation for downstream digital logic circuits

Procurement Notes

Verify the specific suffix and package type against the target design requirements. Confirm that the 3A rating aligns with thermal constraints if used in automotive variants. Ensure compatibility with the required operating temperature range. Cross-reference the datasheet revision to confirm pinout consistency. Validate RoHS compliance status for the specific manufacturing batch.

Selection Notes

Select this component when a fixed 5V output is required from a high-voltage source. The 500kHz frequency allows for smaller external passive components compared to lower-frequency alternatives. Consider the thermal dissipation capabilities of the TSSOP-EP package for high-current loads. Evaluate the need for shutdown functionality if system power management requires low standby currents.

Part Context

This part belongs to the LT1956 family of high-voltage buck regulators. It shares architectural similarities with the LT1766 but offers higher switching frequencies. The EFE-5 designation indicates a specific output voltage configuration and package style. It serves as a solution for compact power designs where board space and efficiency are critical constraints.

Replacement Considerations

LT1956IGN-5#PBF is a documented alternative within the same product family, offering similar electrical characteristics in a different package format.