LT1576CS8-5#PBF

Overview

The LT1576CS8-5#PBF is a synchronous step-down switching regulator from Analog Devices, housed in an 8-pin SOIC package. It provides a fixed positive output of 5V with a maximum output current of 1.5A. The device operates within an input voltage range of 5V to 25V and features a fixed switching frequency of 200kHz. It includes an internal 1.5A switch and supports shutdown functionality. The component is rated for operation between -40°C and +125°C, with a typical operating supply current of 1.16mA.

Feature Summary

• Integrated synchronous rectification for improved efficiency
• Fixed 200kHz switching frequency reduces external component size
• Internal 1.5A power switch eliminates need for external components
• Shutdown pin enables low-power standby modes

Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient step-down conversion
• Industrial control systems with 5V logic requirements
• Communication infrastructure power distribution

Procurement Notes

Verify the specific suffix '-5' confirms the fixed 5V output variant, as other suffixes may indicate adjustable or different voltage options. Confirm RoHS compliance status through official manufacturer documentation. Check for obsolescence notices or limited availability statuses directly from Analog Devices, as distributor listings may not reflect current factory allocation. Ensure the SOIC-8 package matches your PCB footprint requirements.

Selection Notes

Select this part when a fixed 5V output is required with up to 1.5A load capability. The synchronous design offers better efficiency than non-synchronous buck regulators at similar currents. Consider the 200kHz frequency for balancing EMI and passive component size. Verify input voltage stays within the 5V to 25V range. The wide temperature range suits industrial environments where standard commercial parts may fail.

Part Context

This component belongs to the LT1576 family of monolithic buck mode switching regulators. The series integrates high-current switches and control circuitry on a single die. Variants differ by output voltage configuration and package type. The LT1576 series is designed for applications requiring compact solutions with high efficiency and minimal external component count compared to discrete regulator designs.

Replacement Considerations

LT1576IS8-5#PBF is a verified industrial grade substitute with identical electrical specifications but extended temperature rating. LT1576CS8#PBF is a compatible alternative if the fixed 5V output requirement is met by other means or if a different voltage variant is acceptable. Cross-reference pinouts and thermal characteristics before substitution.