600 mA, 750 kHz step-down — what this fixed-output buck does
The 750 kHz switching frequency keeps the external inductor and capacitor small — a 4.7 µH to 10 µH inductor paired with a 10 µF ceramic output cap covers the typical load range.
Input range and output — what the fixed 1 V means for your rail
The fixed 1 V output is set internally — no external resistor divider is needed, which cuts two components and one feedback-node noise path. The 2 V minimum input means this part works from a single Li-Ion cell (nominal 3.6 V) or a 3.3 V regulated bus, but not from a 1.8 V rail. The 5.5 V maximum input covers 5 V ±10 % supplies cleanly; exceeding it requires an upstream pre-regulator. The 600 mA output is continuous — budget derating for ambient temperature and inductor DCR losses; at 85 °C ambient the effective output drops roughly 20 % depending on PCB copper area.
The 10-VSSOP package — a 3 mm × 3 mm body with 0.50 mm pitch — is a compact footprint for space-constrained designs. The surface-mount package reflows with standard lead-free profiles;.