LT1766IGN-5#PBF

Overview

The LT1766IGN-5#PBF is a monolithic buck switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 5.5 V to 60 V and provides a fixed 5 V output. The device delivers up to 1.2 A of output current at a fixed switching frequency of 200 kHz. It features a low quiescent current of 25 uA and supports operation temperatures from 0°C to +125°C. Packaged in a 16-lead SSOP, it includes shutdown functionality for power management.

Feature Summary

• Integrates a high-voltage NPN switch capable of handling input voltages up to 60 V
• Provides fixed 5 V output regulation with integrated soft-start capability
• Features low standby current consumption for battery-powered applications
• Includes thermal shutdown protection to safeguard against overheating

Applications

• Industrial control systems requiring isolated or non-isolated DC-DC conversion
• Battery-powered equipment needing efficient step-down regulation
• Distributed power architectures in telecommunications infrastructure
• Automotive electronics operating within specified temperature ranges

Procurement Notes

Verify the specific suffix #PBF indicates lead-free RoHS compliance before ordering. Confirm the SSOP-16 package availability matches your PCB footprint requirements. Check for recent Product Change Notifications (PCN) regarding manufacturing site transfers or material updates. Ensure the fixed 5 V output variant aligns with your system design needs, as other voltage options exist in the LT1766 family.

Selection Notes

Select this component when a wide input voltage range up to 60 V is required without external high-voltage transistors. The fixed 200 kHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the SSOP-16 package constraints for thermal performance if high ambient temperatures are expected. Verify that the 1.2 A continuous current rating meets the peak load demands of the target application circuit.

Part Context

This part belongs to the LT1766 series of high-voltage buck regulators designed for efficiency and simplicity. It replaces older discrete solutions by integrating the switch, controller, and protection circuits into a single IC. The series is known for robust performance in noisy industrial environments and offers a cost-effective alternative to synchronous rectifiers where efficiency peaks are less critical than component count.

Replacement Considerations

LT1766EFE-5#PBF: Same electrical specifications but housed in a TSSOP-16 package instead of SSOP-16. LT1766EGN-5#PBF: Identical electrical performance but packaged in a narrower SSOP-16 variant. Verify pin-to-pin compatibility and thermal dissipation characteristics when substituting between these package types.