LTC1149CN-5#PBF

DC DC Switching Controllers Overview

The LTC1149CN-5#PBF is a synchronous buck switching regulator controller manufactured by Analog Devices Inc. It utilizes a 16-pin PDIP package and operates with an input voltage range up to 48V. The device features a switching frequency of up to 250kHz and supports a maximum duty cycle of 100%. Designed for high efficiency, it incorporates automatic Burst Mode operation to maintain performance at low output currents. The component includes shutdown functionality and is rated for commercial temperature ranges.

DC DC Switching Controllers Feature Summary

• Synchronous buck topology with integrated control logic
• Automatic Burst Mode operation for enhanced light-load efficiency
• Supports 100% duty cycle for minimal dropout voltage
• Integrated shutdown pin for power management

DC DC Switching Controllers Applications

• Battery-powered portable equipment requiring extended runtime
• Point-of-load regulation in industrial systems
• General-purpose step-down DC-DC converter designs

DC DC Switching Controllers Procurement Notes

Verify the specific suffix and package type against the official Analog Devices datasheet to ensure compatibility with the intended PCB footprint and thermal requirements. Confirm that the 16-pin PDIP configuration meets the assembly constraints of the target manufacturing process. Cross-reference the part number with authorized distributors to validate current availability and authenticity before finalizing procurement plans.

DC DC Switching Controllers Selection Notes

Select this component when a synchronous buck solution with high efficiency at light loads is required. The 100% duty cycle capability makes it suitable for applications where the input voltage may closely approach the desired output voltage. Ensure external MOSFETs are selected to handle the required current levels, as the IC functions primarily as a controller rather than a complete power stage.

DC DC Switching Controllers Part Context

This part belongs to the LTC1149 family of high-efficiency synchronous buck switching regulators. The series is characterized by its ability to drive external complementary N-channel MOSFETs efficiently. The CN-5#PBF designation indicates a specific fixed-output variant within this controller family, distinguished by its through-hole packaging and commercial operating temperature range.

DC DC Switching Controllers Replacement Considerations

Direct replacements within the same family include other LTC1149 variants such as LTC1149CS-5#PBF or LTC1149CS-3.3#PBF, though these utilize surface-mount SO packages. Verify pinout compatibility and thermal dissipation requirements when substituting between package types.