onsemi FAN53745 Synchronous Buck Regulator is a low quiescent current step-down DC-DC converter that delivers a regulated output voltage from an input supply of 2.3V to 5.5V. The combination of built-in power transistors, synchronous rectification, and a tiny solution size makes the device ideal for portable applications. The converter typically operates in PWM mode at a fixed frequency of 3.33MHz. At moderate and light loads, the device will transition into PFM Mode to maintain high efficiency and an excellent transient response. Additionally, a low-power shutdown mode reduces power consumption when the device is disabled. The onsemi FAN53745 is available in a 6-bump, 0.4mm pitch, wafer-level chip-scale package (WLCSP).
