Dual 600 mA buck at 2 MHz
The fixed outputs are 1.2 V and 3.3 V, making it a direct fit for powering a 1.2 V core and 3.3 V I/O rail from a single Li-ion cell or 5 V USB supply. Efficiency peaks above 90 % at moderate loads, and the 2 MHz switching keeps ripple well below 20 mVpp with a proper output cap.
Operating temperature range is -30°C to 85°C ambient, which covers most portable and industrial indoor applications but does not extend to automotive under-hood or extended outdoor enclosures. The thermal pad junction-to-ambient thermal resistance (RθJA) is typically 40 °C/W when the pad is soldered to a 1 in² copper area on a 2-layer board.
The part is ROHS3 compliant (lead-free, no exemptions), and the suffix /NOPB confirms the lead-free finish. For volume pricing and lead time, submit an RFQ against your BOM quantity. This is a current-production TI part, so lead times typically run 8–12 weeks through authorized channels; spot-market availability may be tighter. No direct second-source or pin-compatible alternative is listed by TI — the base product number LM3370 covers several fixed-output voltage variants, but the -3021 suffix is specific to the 1.2 V / 3.3 V combination.