LTC1143CS#TRPBF

Overview

The LTC1143CS#TRPBF is a dual step-down switching regulator controller manufactured by Analog Devices Inc. It operates within an input voltage range of 4 V to 14 V and supports buck and buck-boost topologies. The device features two independent regulator blocks, each driving external power MOSFETs at switching frequencies up to 400 kHz using a constant off-time current mode architecture. It is housed in a 16-pin SOIC package.

Feature Summary

• Dual independent regulator blocks for simultaneous multi-rail generation
• Automatic Burst Mode operation maintains high efficiency at low output currents
• Constant off-time current mode architecture for stable control

Applications

• Portable battery-powered equipment requiring multiple voltage rails
• Industrial systems with limited space constraints
• Communication infrastructure power supplies

Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm the manufacturer is Analog Devices Inc. Ensure the part number matches the exact electrical specifications required for the design. Cross-reference the datasheet for pinout compatibility before integration.

Selection Notes

Select this component for designs requiring two isolated or non-isolated DC-DC outputs from a single controller IC. It is suitable for applications needing high efficiency across varying load conditions. Consider the 400 kHz switching frequency for passive component size optimization.

Part Context

This part belongs to the LTC1143 series of dual synchronous buck controllers. It is designed to replace discrete solutions or single-channel controllers in compact power architectures. The series is known for its ability to drive external MOSFETs efficiently while maintaining regulation under dynamic loads.

Replacement Considerations

LTC1143CS#PBF is a tube-packaged equivalent. LTC1143LCS is a variant with different output current capabilities.