LT1767EMS8#PBF

Overview

The LT1767EMS8#PBF is a monolithic step-down switching regulator manufactured by Analog Devices Inc. It integrates a high-efficiency 1.5A power switch and complete current-mode control circuitry within an 8-pin MSOP package with an exposed pad. The device operates at a fixed switching frequency of 1.25MHz, supporting an input voltage range from 3V to 25V. It provides a fixed output voltage of 1.8V with a maximum output current capability of 1.5A. The component supports Buck and SEPIC topologies and functions reliably across a junction temperature range of -40°C to 125°C.

Feature Summary

• Integrates a high-efficiency 1.5A power switch for compact design
• Utilizes current-mode control architecture for fast transient response
• Ensures excellent loop stability under varying load conditions
• Operates at a fixed 1.25MHz switching frequency

Applications

• Portable battery-powered equipment requiring efficient DC-DC conversion
• Industrial systems utilizing single-supply operation
• Adaptive supply voltage regulation applications
• General-purpose step-down power management circuits

Procurement Notes

Verify the specific suffix configuration when ordering, as Analog Devices utilizes alphanumeric codes to denote output voltage options and packaging variations. Confirm that the #PBF designation corresponds to lead-free RoHS compliance standards required for your assembly process. Ensure the selected variant matches the exact fixed output voltage needed for the target application circuit to avoid functional mismatches.

Selection Notes

Select this component for designs requiring a fixed 1.8V output from higher input rails up to 25V. The integrated 1.5A switch eliminates the need for external pass transistors, simplifying the bill of materials. Consider the 1.25MHz frequency for balancing component size against electromagnetic interference requirements. Verify thermal performance in the final enclosure given the 125°C maximum junction temperature rating.

Part Context

This part belongs to the LT1767 family of monolithic step-down switching regulators. The series offers various fixed output voltage options to accommodate different logic levels and system requirements. All variants share the same core architecture, including the 1.25MHz frequency and 1.5A current capability, differing primarily in internal feedback resistor networks and packaging suffixes.

Replacement Considerations

Direct substitutes include other LT1767 variants with different fixed output voltages, such as LT1767EMS8-2.5 or LT1767EMS8-3.3, provided the voltage requirement differs. Cross-family replacements require careful evaluation of pin compatibility and thermal characteristics.