LM2670SX-ADJ/NOPB – TEXAS INSTRUMENTS

The Texas Instruments LM2670SX-ADJ/NOPB is a 3A step-down switching regulator in a compact, space-saving SOT-23-5 package. Unlike fixed-output versions, the “-ADJ” suffix denotes an adjustable output voltage, typically ranging from 1.23V to 37V, making it highly versatile. The “NOPB” indicates lead-free, halogen-free packaging, complying with RoHS standards. Its internal switching frequency is approximately 500kHz, minimizing external component size. The device incorporates a high-efficiency synchronous rectification architecture, achieving efficiencies exceeding 90% at typical loads, reducing power dissipation and improving thermal performance. Input voltage tolerance spans 4.5V to 40V, offering significant design flexibility._x000D_
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This regulator excels in applications requiring precise, adjustable low-voltage generation from higher input voltages, such as portable devices, battery-powered systems, and instrumentation where a regulated supply is crucial. Its small form factor and high efficiency are particularly advantageous in space-constrained designs. However, designers should note that external components, such as an inductor and feedback resistors, are required to set the output voltage and ensure stability. The absence of integrated soft-start necessitates careful consideration of inrush current during power-up. Its inherent simplicity, combined with its wide adjustable output range and high efficiency, makes the LM2670SX-ADJ/NOPB a compelling choice for a broad range of power supply applications.