XC9103 Series

Ceramic Cap. Compatible Step-up DC/DC Controllers

The XC9103 series are PWM, PWM/PFM auto switching /manual switching controlled multi-functional step-up DC/DC 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 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 becomes unnecessary.

With 0.9V of standard voltage supply internal, and using externally connected components, output voltage can be set up freely within a range of 1.5V to 30V. With 300kHz or 180kHz frequencies, the size of the external components can be reduced. Oscillation frequencies of 100kHz and 500kHz are also available as custom-designed products.

The XC9103 offers PWM operation.

Typical Application Circuit


Input Voltage Range 0.9V~10V
Power Supply Voltage Range 1.8V~10V
Output Voltage Range 1.5V~30V,Can be set freely with 0.9V(±2.0V) of reference voltage supply and external registors.
Oscillation Frequency 100,180,300,500kHz(±15%)
Output Current More than 400mA(VIN=1.8V,VOUT=3.3V)
Control PWM
High Efficiency 85%(TYP.)
Stand-by Current ISTB=1.0μA(MAX.)
Load Capacitors Low ESR capacitors compatible



Technical Document

Quality Reports


QuestionWhat is the soft-start function?

The function to soften the rise to prevent the inrush current.

QuestionWhat is the standby current?

The current that flows through the IC in the standby mode. The standby mode means the state where the IC has been turned off by the CE function.

QuestionWhat does the FB product mean?

An IC for which any output voltage can be set by the reference voltage of the FB pins and the external dividing resistor. The output voltage is determined by the RFB1 and RFB2 values, using the following formula: VOUT = Vref × (RFB1 + RFB2)/RFB2