Inverting Micro DC/DC
The XCL301 series is an inverting micro DC/DC converter which integrates a P-channel FET, an inductor and a control IC in one tiny package (2.5mm x 2.0mm x 1.00mm). A wide operating voltage range of 2.7V to 5.5V enables support for applications that require an internally fixed output voltage (-3.3V).
The XCL301 series uses automatic PFM/fixed off time PWM. In automatic PFM/fixed off time PWM control, the IC operates by PFM control when the load is light to achieve high efficiency over the full load range from light to heavy. The device provides a stable inverting power supply to be configured using only a SBD and two capacitors connected externally.
During stand-by, all circuits are shutdown to reduce current consumption to as low as 0.1μA(TYP) or less. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel MOS driver transistor is forced OFF when input voltage becomes 2.2V or lower. The XCL301's CL High Speed discharge function enables the electric charge at the output capacitor CL to be discharged via the internal discharge.