600 mA Buck Regulator for Automotive Rails
The TPS62261TDRVRQ1 is a fixed 1.8 V output step-down buck converter from Texas Instruments, rated for 600 mA continuous output current. It switches at 2.25 MHz, which lets the output filter use smaller inductors and capacitors than a 500 kHz part — a real board-space saver in ECU modules where every mm² counts.
Input Range and Thermal Margin
Input voltage range is 2 V to 6 V, so it runs comfortably from a 3.3 V or 5 V rail — the 3.3 V input question is straightforward: yes, 3.3 V sits well inside the operating window. If your design sees junction temperatures above that, look at the LM53625LQURNLRQ1 which rates to 150°C junction.
The datasheet layout recommendation calls for a 2x2 array of 0.3 mm vias — skip them and the thermal resistance climbs. The WSON is a QFN-style package; rework requires a hot-air nozzle that covers the whole body, not just one side.
That means no last-time-buy scramble for this BOM line. Texas Instruments lists it as ROHS3 compliant.