GENERAL DESCRIPTION
The XC9103/XC9104/XC9105 series are PWM, PWM/PFM auto switching /manual switching controlled universal step-up DC/DC converter controllers. Output will be stable no matter which load capacitors are used but should a low ESR capacitor be used, RSENSE of about 0.1Ω will be required and phase compensation will be achieved. This allows the use of ceramic capacitors and enables to obtain lower output ripple and small PCB design. Tantalum and electrolytic capacitors can also be used, in which case, RSENSE becomes unnecessary. With 0.9V internal voltage reference and by using externally connected two resistors, output voltage can be set freely within a range of 1.5V to 30V. The series is available in 300kHz and 180kHz frequencies, the size of the external components can be reduced. 100kHz and 500kHz are also available in custom options. The XC9103 offers PWM operation. The XC9105 offers both PWM and PWM/PFM auto switching operations and it can be selected by external signal.
TOREX SEMICONDUCTOR
