LM18298T

Full Half-Bridge (H Bridge) Drivers Overview

The LM18298T is a synchronous step-down DC-DC converter manufactured by National Semiconductor. It operates with an input voltage range of 3V to 5.5V and delivers a maximum output current of 1A. The device integrates high-side and low-side N-channel power MOSFETs, eliminating the need for external Schottky diodes. It supports fixed output voltages of 1.8V, 2.5V, 3.3V, and 5V, or allows for adjustable output via an external resistor divider. The controller functions at a switching frequency of 500kHz and includes comprehensive protection features such as cycle-by-cycle current limiting, thermal shutdown, and soft-start capabilities.

Full Half-Bridge (H Bridge) Drivers Feature Summary

• Integrated synchronous rectification using internal N-channel MOSFETs
• Fixed and adjustable output voltage configurations
• Built-in thermal shutdown and cycle-by-cycle current limit protection

Full Half-Bridge (H Bridge) Drivers Applications

• Portable electronics requiring efficient power conversion
• Battery-powered devices with single-cell lithium-ion inputs
• Embedded systems needing stable regulated voltage rails

Full Half-Bridge (H Bridge) Drivers Procurement Notes

Verify the specific suffix 'T' indicates tape and reel packaging when sourcing. Confirm the manufacturer origin, as National Semiconductor assets are managed by Texas Instruments. Ensure the component meets RoHS compliance requirements for your region. Cross-reference the exact part number with official distributor catalogs to confirm availability and authenticity before procurement.

Full Half-Bridge (H Bridge) Drivers Selection Notes

Select this component for designs requiring a compact solution with integrated power switches. It is suitable for applications where board space is limited and efficiency is critical. Consider the fixed output options if standard voltages suffice, otherwise use the feedback pin for custom regulation. Evaluate the thermal performance based on the expected load current and ambient temperature conditions.

Full Half-Bridge (H Bridge) Drivers Part Context

This device belongs to the family of synchronous buck converters designed for low-voltage, high-efficiency applications. It replaces older asynchronous designs that required external diodes, thereby reducing component count and improving overall system efficiency. The integration of control logic and power stages into a single package simplifies the design process for engineers developing compact electronic systems.

Full Half-Bridge (H Bridge) Drivers Replacement Considerations

Check for direct equivalents from Texas Instruments under the updated naming conventions. Verify compatibility with existing PCB footprints and electrical specifications if substituting with similar synchronous buck regulators from other manufacturers.