LTC1149CN-3.3#PBF

DC DC Switching Controllers Overview

The LTC1149CN-3.3#PBF is a high-efficiency synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates in a positive output configuration with a fixed 3.3V nominal voltage. The device utilizes a 16-pin PDIP package and supports a wide input voltage range, typically up to 10V or higher depending on specific conditions, while delivering regulated power. As a synchronous controller, it integrates high-side and low-side drivers for external MOSFETs to maximize efficiency. The component is designed for applications requiring compact solutions with minimal external component count.

DC DC Switching Controllers Feature Summary

• Synchronous step-down topology for enhanced conversion efficiency
• Integrated driver circuitry for external N-channel MOSFETs
• Fixed 3.3V output voltage option within the series
• Compact 16-pin PDIP packaging for through-hole implementation

DC DC Switching Controllers Applications

• Portable battery-powered equipment requiring efficient voltage regulation
• Industrial control systems utilizing 5V or 12V bus architectures
• Communication infrastructure power distribution networks
• Embedded systems needing stable 3.3V logic supply rails

DC DC Switching Controllers Procurement Notes

Verify the specific suffix and package type against the original design specifications before procurement. Confirm that the 16-pin PDIP form factor aligns with the target PCB footprint. Ensure compatibility with the required input voltage range and thermal management strategy for the intended operating environment. Cross-reference the manufacturer's latest datasheet for any pinout revisions or updated electrical characteristics.

DC DC Switching Controllers Selection Notes

Select this component when a synchronous buck solution is preferred over asynchronous designs for improved efficiency at moderate loads. The fixed 3.3V output eliminates the need for external feedback resistors, simplifying the bill of materials. Consider the PDIP package constraints regarding thermal dissipation and board space compared to surface-mount alternatives. Validate that the external MOSFET selection meets the current and switching speed requirements of the application.

DC DC Switching Controllers Part Context

This part belongs to the LTC1149 family of high-efficiency synchronous step-down switching regulators from Analog Devices. The family includes variants with different output voltages and packages, such as the CS (SOIC) and IS (MSOP) options. The CN designation specifically indicates the ceramic DIP package variant. These regulators are designed to replace linear regulators in applications where power dissipation and efficiency are critical concerns.

DC DC Switching Controllers Replacement Considerations

Direct replacements include other members of the LTC1149 family, such as the LTC1149CS-3.3#PBF for surface-mount applications. Verify that substitute components maintain the same synchronous architecture and output voltage specification. Ensure that the replacement package fits the existing mechanical constraints if a direct swap is required without PCB redesign.