LT1111CS8-5#PBF

Overview

The LT1111CS8-5#PBF is a micropower DC/DC converter from Analog Devices, packaged in an 8-SOIC surface-mount format. It operates as a buck or boost regulator with a fixed 5V output and supports input voltages from 2V to 30V. The device delivers up to 800mA output current with a switching frequency of 72kHz. Quiescent current is specified at 300µA, and it functions within a temperature range of 0°C to +70°C.

Feature Summary

• Supports both step-up (boost) and step-down (buck) conversion topologies for flexible power management
• Integrated internal power switch eliminates the need for external high-current components
• Low quiescent current consumption optimizes efficiency in battery-powered systems

Applications

• Portable instrumentation requiring stable voltage regulation from varying input sources
• Battery-operated devices utilizing single-cell primary power sources
• Remote sensor nodes where low standby current is critical

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence. Confirm the SOIC-8 package dimensions match your PCB footprint requirements. Ensure the fixed 5V output variant aligns with system voltage needs, as adjustable versions exist within the same family.

Selection Notes

Select this component when a fixed 5V output is required alongside buck-boost flexibility. Compare against the LT1110 if lower input voltage operation below 2V is necessary. Consider the LT1111CS8#PBF if an adjustable output voltage provides design flexibility over the fixed version.

Part Context

This part belongs to the LT1111 series of micropower DC/DC converters. It shares the core architecture with the LT1110 but offers higher current capability and optimized performance for inputs above 3V. The series is designed for space-constrained applications using minimal external components.

Replacement Considerations

LT1111CS8#PBF serves as the adjustable output alternative within the same package.