Fixed 1.26 V rail at 500 mA — what the 5.45 MHz buys
The TPS62679ZYFMT is a fixed-output step-down (buck) regulator delivering 500 mA at 1.26 V from a 2.3 V to 4.8 V input rail — a single Li-ion cell or a 3.3 V regulated bus. The 5.45 MHz switching frequency lets the designer use a sub-1 µH inductor and small ceramic capacitors, shrinking the total solution footprint to fit the 6-DSLGA package outline.
Input range and output tolerance for a tight rail
With a minimum input of 2.3 V and maximum of 4.8 V, this regulator is tuned for portable or battery-backed rails where the supply sags under load. The fixed 1.26 V output suits core supplies for low-voltage logic or memory — no external resistor divider needed.