LT1767EMS8-1.8#PBF

Overview

The LT1767EMS8-1.8#PBF is a monolithic step-down switching regulator manufactured by Analog Devices Inc., housed in an 8-pin MSOP package. It integrates a high-efficiency 1.5A power switch and current-mode control circuitry to operate at a fixed 1.25MHz switching frequency. The device provides a fixed 1.8V output from an input voltage range of 3V to 25V. Key electrical parameters include a maximum output current of 1.5A, a shutdown feature for low-power applications, and operation within a junction temperature range of -40°C to +125°C.

Feature Summary

• Integrates a high-efficiency 1.5A power switch with all necessary control circuitry for a complete switching regulator solution.
• Utilizes current-mode control architecture to deliver fast transient response and excellent loop stability.
• Supports adjustable soft-start functionality to limit inrush current during startup sequences.

Applications

• Buck converter circuits requiring fixed 1.8V regulation
• SEPIC topology designs for dual-output or non-inverting step-up/step-down conversion
• Dual source supply configurations utilizing low reverse leakage characteristics

Procurement Notes

Verify the specific suffix #PBF indicates lead-free tape-and-reel packaging compliance when sourcing. Confirm that the MSOP-8 package variant matches your PCB footprint requirements. Ensure the fixed 1.8V output version aligns with your system voltage rails, as other voltage options exist within the LT1767 family. Cross-reference the manufacturer's latest datasheet for any recent material declaration updates.

Selection Notes

Select this component when a compact, high-frequency buck regulator is needed with integrated power switching capabilities. The fixed 1.8V output eliminates external feedback resistor networks for standard logic levels. Consider the 1.25MHz frequency for smaller passive component sizes compared to lower-frequency alternatives. Evaluate the thermal performance in the MSOP package against your expected load currents and ambient conditions.

Part Context

This part belongs to the LT1767 series of monolithic DC-to-DC converters designed for space-constrained applications. The series combines a 1.5A switch with current-mode control in a small outline package. Variants are available with different fixed output voltages or adjustable settings, sharing the same core control architecture and switching frequency specifications.

Replacement Considerations

LT1767EMS8-1.8#TRPBF: Identical electrical specifications and pinout; differs only in tape-and-reel packaging format instead of tube.