LM4128AMFX-3.3/NOPB – TEXAS INSTRUMENTS

The Texas Instruments LM4128AMFX-3.3/NOPB is a low-dropout (LDO) linear regulator integrated circuit specifically designed for applications requiring a stable 3.3V output from a higher input voltage. It operates with an input voltage range of 3.8V to 5.5V, providing a highly efficient and clean 3.3V output with minimal voltage ripple and noise. The device features a maximum output current of 300mA, sufficient for many microcontroller and peripheral power requirements. Packaged in a space-saving 6-pin SOT-23 (SC-70-6) surface-mount package, the “/NOPB” suffix indicates lead-free and RoHS-compliant construction._x000D_
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The LM4128AMFX-3.3/NOPB employs a fixed-output voltage architecture, eliminating the need for external components for voltage setting, simplifying design and reducing board space. Its low quiescent current contributes to excellent efficiency, especially beneficial in battery-powered applications. Its internal thermal shutdown and short-circuit protection mechanisms enhance reliability and prevent damage from overcurrent situations. Common applications include powering microcontrollers, sensor nodes, and other low-power digital circuits where a stable 3.3V supply is crucial and space constraints are a factor. Its advantages lie in its compact size, high efficiency, low noise output, and robust protection features.