From old datasheet system High Efficiency, Low Noise,
Inductorless step-down
DC/DC converter High Efficiency, Low Noise, Inductorless step-down DC/DC converter; Package: SOT; No of Pins: 6; Temperature Range: -40°C to 125°C 0.35 A SWITCHED CAPACITOR REGULATOR, 1800 kHz SWITCHING FREQ-MAX, PDSO6