LTC1147LCS8-3.3#TRPBF

DC DC Switching Controllers Overview

The LTC1147LCS8-3.3#TRPBF is a high-efficiency step-down switching regulator controller manufactured by Analog Devices Inc. It operates with an input voltage range of 3.5 V to 16 V and provides a fixed 3.3 V output. The device supports an output current of up to 1.25 A and features a switching frequency of 400 kHz. It utilizes an SOIC-8 package for surface mount installation. Key electrical specifications include a quiescent current of 20 uA, a supply current of 1.6 mA, and a load regulation of 40 mV. The component functions within a temperature range of 0°C to +70°C.

DC DC Switching Controllers Feature Summary

• Features automatic Burst Mode operation to maintain high efficiency at low output currents
• Designed to drive an external N-channel power MOSFET for buck topology applications
• Includes shutdown capability for power management flexibility

DC DC Switching Controllers Applications

• Battery-powered portable equipment requiring extended runtime
• General-purpose DC/DC conversion in space-constrained designs
• Systems utilizing single-cell lithium-ion or nickel-cadmium/nickel-metal hydride batteries

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing. Confirm the industrial temperature grade (C) aligns with operational requirements. Ensure compatibility with external MOSFET selection for the 1.25 A output target. Cross-reference the manufacturer part number directly with official Analog Devices documentation to avoid counterfeit components.

DC DC Switching Controllers Selection Notes

Select this controller for applications prioritizing efficiency over light loads due to its Burst Mode architecture. The fixed 3.3 V output simplifies design for standard logic levels. Consider the 400 kHz switching frequency when selecting external inductors and capacitors. Verify that the external MOSFET can handle the required current and voltage stresses within the specified operating temperature range.

DC DC Switching Controllers Part Context

This component belongs to the LTC1147 series of high-efficiency step-down switching regulator controllers. The series is characterized by its ability to operate efficiently across varying load conditions. The LCS8 variant specifically denotes the commercial temperature range and SOIC-8 package configuration. The #TRPBF suffix identifies the reel packaging format and lead-free compliance.

DC DC Switching Controllers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data.