LM2743MTC-NS

DC DC Switching Controllers Overview

The LM2743MTC-NS is a low voltage N-channel MOSFET synchronous buck regulator controller manufactured by National Semiconductor. It operates with an input voltage range of 2.2 V to 16 V and supports a switching frequency between 50 kHz and 1 MHz. The device features a maximum duty cycle of 80% and includes control functions such as current limit, enable, frequency control, power good, soft start, and tracking. It is designed for efficient step-down conversion in compact applications.

DC DC Switching Controllers Feature Summary

• Synchronous rectification using external N-channel MOSFETs for high efficiency
• Integrated tracking capability for multi-rail power sequencing
• Comprehensive protection including current limiting and soft start
• Wide operating temperature range suitable for industrial environments

DC DC Switching Controllers Applications

• Point-of-load regulation in embedded systems
• Power management for portable electronic devices
• Industrial control system voltage conversion
• Telecommunications equipment power supplies

DC DC Switching Controllers Procurement Notes

Verify the manufacturer origin, as National Semiconductor was acquired by Texas Instruments. Confirm the suffix NS indicates National Semiconductor packaging or specification. Ensure compatibility with required input voltage and thermal constraints. Check datasheet revision dates for updated electrical characteristics. Validate package type TSSOP-14 availability from authorized distributors.

DC DC Switching Controllers Selection Notes

Select this component when a synchronous buck controller with tracking is required for low voltage inputs. Consider the 2.2 V minimum input voltage constraint. Evaluate the need for external N-channel MOSFETs and associated gate drive requirements. Assess thermal performance within the -40°C to 125°C junction temperature range. Verify switching frequency settings against EMI and efficiency targets.

DC DC Switching Controllers Part Context

The LM2743 series belongs to Texas Instruments' (formerly National Semiconductor) portfolio of low voltage synchronous buck controllers. It is part of a family that includes variants like LM2744 and LM2746. These controllers are designed for applications requiring high efficiency and compact solutions. The LM2743 specifically focuses on voltage mode control with integrated tracking features.

DC DC Switching Controllers Replacement Considerations

LM2743MTC/NOPB is a direct replacement with identical functionality but different packaging suffix. LM2744 offers similar features with an external reference option. LM2746 provides comparable synchronous buck control without tracking. Verify pinout compatibility and electrical specifications before substitution.