XC9110
DESCRIPTION
The XC9110/9111 series is a group of PFM controlled step-up DC/DC converter/controller ICs designed to generate low supply voltage by the bination of PFM control and CMOS structure. The series is ideal for applications where a longer battery life is needed such as in portable munication equipment. With a built-in 2.5Ω N-channel driver transistor, the XC9110A/C/E and XC9111A/C/E types provide a step-up operation by using only a coil, a capacitor, and a diode connected externally.
The XC9110/9111B, D and F versions can be used with an external transistor for applications requiring larger currents. Output voltage is internally programmable in a range from 1.5V to 7.0V in increments of 0.1V (accuracy: ± 2.5%). Maximum oscillation frequency is set to 100k Hz for XC9110/9111 series. (At light loads, it is set to 180k Hz for the XC9111 series.) Options include products equipped with a CE pin (C and D versions) that allows the IC to be shut down thereby reducing supply current and...
