XC6366 Series

PWM Control, PWM/PFM Switchable Step-Down DC/DC Controller

The XC6366 series are multi-functional step-down DC/DC converters with built-in high speed, low ON resistance drivers. An output current of more than 1A is possible using an externally connected transistor, coil, diode and capacitor. Output voltage is programmable in 0.1V steps between 1.5V to 6.0V (VOUT) (±2.5% accuracy). Further, with 1.0V of standard voltage supply internal and using externally connected components, output voltage can be set up freely (FB).

With a 300kHz switching frequency, the size of the external components can be reduced. Control switches from PWM to PFM during light loads with the XC6366

(PWM/PFM switchable) and the series is highly efficient from light loads to large output currents. In relation to soft-start time, both internally set-up 10ms types (A,B) and external resistor or capacitor regulated types (C,D) are available. During stand-by time (CE pin "Low"), current consumption is reduced to less than 0.5μA. With UVLO internal, the external Tr. will be forcibly switched off if used below the stipulated voltage.

Typical Application Circuit


Input Voltage Range 2.2V~10V
Output Voltage Range 1.5V~6.0V(0.1V increments)
Oscillation Frequency 300kHz(±15%), Custom Products 180,500kHz
Output Current More than 1.0A(VIN=5.0V,VOUT=3.0V)
High Efficiency 92%(TYP.)
Stand-by Current ISTB=0.5μA(MAX.)



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