The TPS61090RSAR from Texas Instruments is a high-efficiency, adjustable 500-mA boost-converter voltage regulator. It offers an efficieny of up to 96%, and operates over a wide input voltage range from 2.1 V to 5.25 V, allowing it to be used in a variety of applications. The TPS61090RSAR has excellent transient response and is able to operate over a wide temperature range from -40°C to +125°C. The device also offers a comprehensive array of programmable features, such as adjustable output voltage, adjustable switching frequency, dual enable, and programmable current-limit protection. The TPS61090RSAR is offered in a SOT23-5 package, making it an ideal choice for space-constrained applications.