LTC1148LCS#PBF

DC DC Switching Controllers Overview

The LTC1148LCS#PBF is a high-efficiency synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates with an input voltage range of 3.5V to 20V and delivers a fixed 5V output at up to 700mA. The device features automatic Burst Mode operation for enhanced light-load efficiency, reducing quiescent current to 160µA. Operating at a 250kHz switching frequency, it utilizes a 14-pin SOIC package. Key electrical parameters include a load regulation of 60mV and a shutdown feature for power management.

DC DC Switching Controllers Feature Summary

• Automatic Burst Mode operation maintains high efficiency across varying load conditions
• Synchronous rectification design minimizes power losses in the step-down conversion process
• Integrated shutdown pin enables effective power management and system sleep modes

DC DC Switching Controllers Applications

• Portable computers requiring efficient battery-powered DC-DC conversion
• Hand-held equipment needing compact power supply solutions
• Battery-operated systems prioritizing extended operational life through low quiescent current

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and tube packaging when sourcing. Confirm the LCS variant corresponds to the 5V fixed output version. Ensure compatibility with 14-pin SOIC footprints during PCB layout. Cross-reference manufacturer documentation for any recent lifecycle status changes or alternative recommendations due to potential obsolescence.

DC DC Switching Controllers Selection Notes

Select this component for applications requiring a fixed 5V output from a 3.5V to 20V input range. The 700mA output current capability suits moderate load requirements. Consider the 250kHz switching frequency for balancing component size and EMI performance. The Burst Mode feature is critical for designs where light-load efficiency significantly impacts overall system battery life.

DC DC Switching Controllers Part Context

This part belongs to the LTC1148 series of synchronous step-down switching regulator controllers. The family emphasizes high efficiency and low noise for portable electronics. The LCS designation typically denotes a specific output voltage configuration within the broader LTC1148 product line, differentiated by internal feedback resistors.

DC DC Switching Controllers Replacement Considerations

Consult official Analog Devices documentation for verified substitute part numbers. Direct replacements must match the 14-pin SOIC package, 3.5V-20V input range, and 5V/700mA output specifications. Verify functional compatibility regarding Burst Mode operation and switching frequency before integration.