LTC1147LIS8#TRPBF

Overview

The LTC1147LIS8#TRPBF is a high-efficiency step-down DC-DC controller IC manufactured by Analog Devices Inc. It operates with an input voltage range of 3.5 V to 16 V and delivers a fixed positive output of 3.3 V at up to 700 mA. The device features a switching frequency of 400 kHz, low quiescent current of 20 µA, and operates within a temperature range of -40°C to +85°C. Packaged in an 8-pin SOIC for surface mount applications, it includes shutdown functionality and current limit protection.

Feature Summary

• High efficiency buck switching regulator controller
• Fixed 3.3 V output capability
• Low static current consumption
• Integrated current limit protection

Applications

• Battery-powered portable equipment
• Industrial control systems
• Communication infrastructure power supplies

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing. Confirm the manufacturer is Analog Devices Inc. Ensure the component matches the exact part number to avoid compatibility issues with existing designs. Check RoHS compliance status as required by project specifications.

Selection Notes

Select this component for designs requiring a fixed 3.3 V output from higher input voltages. Consider the 400 kHz switching frequency for balancing size and efficiency. Evaluate the 700 mA output current against load requirements. Verify the SOIC-8 package fits the PCB layout constraints.

Part Context

This part belongs to the LTC1147 series of high-efficiency buck regulators. It is designed for applications needing reliable step-down conversion with minimal standby power. The series supports various output voltages and packages, including industrial temperature grades.

Replacement Considerations

Check for direct pin-compatible alternatives within the Analog Devices portfolio. Verify that any substitute maintains the 3.3 V output and 700 mA current rating. Ensure thermal performance and switching frequency are compatible with the existing circuit design.