Fixed 2.5 V output, 300 mA buck in a hand-solderable SOT-23-5
The TPS62205DBVT is a 1 MHz fixed-frequency step-down (buck) regulator from Texas Instruments, delivering a regulated 2.5 V output at up to 300 mA from a 2.5 V to 6 V input rail. The 1 MHz switching rate lets you use small inductors and ceramic output capacitors, keeping the total solution compact enough for a two-layer board — and the SOT-23-5 footprint is easy to hand-solder with a fine-tip iron, great for a weekend prototype or a tight production layout.
300 mA current rating and input voltage range
With a maximum output current of 300 mA, this regulator suits low-power loads like a small MCU, a sensor module, or an RF transceiver. The input range from 2.5 V to 6 V covers single-cell Li-ion (3.0–4.2 V), a 3.3 V rail, or a 5 V USB bus — no extra linear pre-regulator needed. The fixed 2.5 V output eliminates external feedback resistors, saving two components and one potential noise injection point.
Synchronous rectification and industrial temperature grade
The built-in synchronous rectifier improves efficiency at light loads compared to a diode-based buck — a practical advantage when the load draws low current most of the time, such as in a battery-powered datalogger.