LT1765EFE-3.3#PBF

Overview

The LT1765EFE-3.3#PBF is a monolithic buck switching regulator manufactured by Analog Devices Inc., housed in a 16-TSSOP package with an exposed thermal pad. It provides a fixed 3.3V output capable of delivering up to 3A of current. The device operates within an input voltage range of 3V to 25V and utilizes a fixed 1.25MHz switching frequency to minimize external component size. It features a low quiescent current of 15µA and supports operation temperatures from 0°C to 125°C junction temperature.

Feature Summary

• Integrates a high-efficiency 3A internal power switch for robust load handling
• Utilizes a fixed 1.25MHz switching frequency to reduce passive component footprint
• Features ultra-low 15µA quiescent current for enhanced battery efficiency
• Includes shutdown capability to minimize standby power consumption

Applications

• Negative DC/DC converters utilizing the positive buck topology
• Space-constrained embedded systems requiring compact power solutions
• General-purpose 12V to 3.3V step-down conversion circuits

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence before procurement. Confirm the 16-TSSOP-EP package availability matches your PCB footprint requirements. Ensure the fixed 3.3V output variant aligns with system voltage needs, as other voltage options exist within the LT1765 family. Cross-reference the manufacturer's latest datasheet for any recent material declaration updates or pinout revisions.

Selection Notes

Select this component when a fixed 3.3V output is required alongside high current capacity in a small form factor. The 1.25MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Consider the exposed pad requirement for thermal management during selection. Verify that the 3V minimum input voltage suits the lowest expected supply rail conditions.

Part Context

This part belongs to the LT1765 series of monolithic buck converters designed for high-performance applications. It shares the core architecture with variants offering different fixed output voltages, such as the LT1765EFE-5#PBF. The series is characterized by its ability to operate efficiently across a wide input voltage range while maintaining stability under varying load conditions.

Replacement Considerations

LT1765EFE-5#PBF offers identical electrical characteristics except for a fixed 5V output instead of 3.3V.