600 mA synchronous buck in a 5-pin SOT-23
The Texas Instruments TPS62260DDCRG4 is a 600 mA synchronous step-down (buck) converter in a thin SOT-23-5 package. It takes an input from 2 V up to 6 V and delivers an adjustable output from a 0.6 V reference up to the input rail.
What the 2.25 MHz switching buys you on the board
At 2.25 MHz the TPS62260DDCRG4 can run with inductor values in the 1 µH to 4.7 µH range and ceramic output caps — no high-ESR tantalum needed. That saves board area and keeps the output ripple low. The trade-off is switching losses that cap efficiency at moderate loads; for a 600 mA part this frequency is a good fit for battery-powered wireless modules and portable instruments where board space matters more than peak efficiency at full load. The synchronous rectifier is integrated, so there is no external Schottky diode. This simplifies the layout and improves light-load efficiency — the part stays in continuous conduction mode down to lower currents than an asynchronous design would.
Output voltage adjust and input limits
Output is adjustable via an external resistor divider from a 0.6 V internal reference up to the input voltage. The 2 V minimum input means it runs from a single Li-ion cell (3.0-4.2 V) or two alkaline cells, but it cannot start from a single NiMH cell below 2 V. The 6 V input maximum rules out 12 V rails — this is a low-voltage part for portable and 5 V bus applications. The SOT-23-5 Thin package has a junction-to-ambient thermal resistance that limits full 600 mA output at the high end of the temperature range — derate if the board runs hot or airflow is restricted.
The base product number is TPS62260. No official second-source or pin-compatible cross-reference is listed in the record; the part is single-sourced to TI.