Texas Instruments LM27313 Adjustable Boost Switching Regulator, 800mA

The Texas Instruments LM27313XMF/NOPB is a highly efficient, adjustable output boost (step-up) DC/DC converter, designed to provide an exceptionally compact and high-density power solution. Integrated within a tiny 5-pin SOT-23 package is a robust 30V internal FET switch, enabling the generation of boosted output voltages from 4V to 28V from a wide input range of 2.7V to 14V. This design, combined with a high 1.6MHz switching frequency, allows for the use of small external inductors and capacitors, resulting in a complete power supply with a very small footprint.

Key to its performance is a low RDS(ON) DMOS FET switch capable of handling switching currents up to 800mA, minimising power losses and maximising efficiency. For power-sensitive applications, a logic-level shutdown pin is provided, reducing quiescent current to less than 1µA to significantly extend battery life in portable devices. Comprehensive protection is built-in, featuring cycle-by-cycle current limiting and thermal shutdown to ensure reliable operation under fault conditions.

The regulator is internally compensated, which greatly simplifies the external circuit design, reduces the overall component count, and accelerates time to market for your project. It operates across a robust junction temperature range of -40°C to 125°C, making it suitable for demanding environments. This combination of high integration, performance, and protection makes the LM27313 an outstanding choice for modern, space-constrained electronic designs.