XC9301 Series

PWM, PWM/PFM Switching Step-Up & Down DC/DC Converters

The XC9301 series are step-up/down DC/DC converter controller ICs with fast, low ON resistance drivers built-in. A versatile, large output current, step-up/down DC/DC converter can be realized using only 4 basic external components - transistors, coils, diodes and capacitors.

Output voltage is selectable in 0.1V steps within a 2.4V ~ 6.0V (±2.5%) range and switching frequency is set at 180kHz or 300kHz.

Soft-start time is internally set to 10 ms which offers protection against rush currents when the power is switched on and also against voltage overshoot.

During shutdown (CE pin = L), consumption current can be reduced to as little as 0.5μA or less.

Typical Application Circuit


Input Voltage Range 2.0V~10V
Output Voltage Range 2.4V~6.0V(±2.5%),(0.1V increments)
Oscillation Frequency 180KHz,300kHz(±15%)
Output Current More than 250mA (VIN=2.4V,VOUT=3.3V)
High Efficiency 81%(TYP.)@5.0V, 78%(TYP.)@3.3V
Stand-by Current ISTB=0.5μA(MAX.)
Maximum Duty Cycle 85%(TYP.)
Functions Output voltage internally set up



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