LT1376CS8-5#PBF

Overview

The LT1376CS8-5#PBF is a monolithic buck mode switching regulator manufactured by Analog Devices Inc. It integrates a 1.5A power switch, oscillator, and control logic within an 8-pin SOIC package. The device operates at a fixed 500kHz switching frequency to minimize external component size. It provides a fixed 5V output from an input voltage range of 6V to 25V. The part supports continuous output currents up to 1.5A and includes thermal shutdown protection for reliable operation in compact power supply designs.

Feature Summary

• Integrates a high-current 1.5A internal power switch with complete control circuitry
• Utilizes a fixed 500kHz switching frequency to reduce passive component footprint
• Provides a fixed 5V regulated output suitable for standard digital logic loads

Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient step-down conversion
• General-purpose DC/DC conversion in industrial instrumentation

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence before procurement. Confirm the SOIC-8 package dimensions match your PCB layout requirements. Ensure the fixed 5V output variant aligns with system voltage needs, as other voltage options exist within the LT1376 family. Cross-reference the manufacturer datasheet for absolute maximum ratings to prevent operational damage.

Selection Notes

Select this component when a fixed 5V output is required without external feedback resistors. The 500kHz frequency offers a balance between efficiency and component size compared to lower-frequency alternatives. Consider the 1.5A current limit for load requirements; higher current demands may require parallel configurations or different topology ICs. Verify that the input voltage range of 6V to 25V covers the source supply variations.

Part Context

This part belongs to the LT1376 series of high-efficiency buck regulators. It shares architectural similarities with the LT1375 but differs in switching frequency and current capabilities. The CS8 designation identifies the commercial temperature range and surface-mount SOIC-8 packaging. It serves as a direct replacement for older linear regulators in 5V distribution networks where heat dissipation is a constraint.

Replacement Considerations

Direct substitutes include the LT1376CN8-5#PBF for through-hole DIP applications. For pin-compatible surface-mount alternatives, verify equivalent current and frequency specifications. Ensure any replacement maintains the 500kHz switching frequency to preserve existing filter component values.