XC9107
DESCRIPTION
☆Green Operation-patible
The XC9106 / XC9107 series are step-up DC/DC controller ICs with an externally applied reference voltage (Vref).
Output voltage will be set with external resistors (RFB1 and RFB2) and Vref value. The series make it easy to control output voltage externally and are suited to software applications that need to vary voltage, such as LCD power supply for PDA.
Output will be stable no matter which load capacitors are used but if a low ESR capacitor is used, RSENSE of about 0.1Ω will be required and phase pensation will be achieved. This makes the use of ceramic capacitors much easier, and allows for lower output ripple and reduced PCB area requirements. Tantalum and electrolytic capacitors can also be used, in which case,
RSENSE bees unnecessary.
Oscillation frequencies of high clock, low ripple 300k Hz and low supply current 100k Hz are available.
The XC9107 series are PWM/PFM automatic switching controlled. Control switches from PWM to PFM...
