XC6367/6368

      The XC6367/68 series are multi-functional step-up DC/DC converter controllers with built-in high speed, low ON resistance drivers. Large output currents of XC6367/68  are possible using an externally connected transistor, coil, diode and condenser. Output voltage is selectable in 0.1 steps within a 1.5V ~ 6.5V range (±2.5%). For output voltages outside this range, we recommend this FB version, which has a 1.0V internal reference voltage. Using this version, the required output voltage can be set-up using 2 external resistors. 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 XC6368 (PWM/PFM switchable) and the series is highly efficient from light loads to large output currents. Soft start time of XC6367/68A, B, and C series is internally set to 10msec and XC6367/68C, D, and F series regulate soft start time by connecting resistors and capacitors exteranally. During stand-by time (CE pin "Low"), current consumption is reduced to less than 0.5A.
      XC6367/68 's features are listed as follows: Input voltage range is 0.9V~10V, Operating voltage range is 2.0V~10V, Output voltage range is 1.5V~6.5V programmable in 0.1V steps (±2.5%), Oscillator frequency is 300, 100kHz (±15%) Custom products for 180, 500kHz, Output Current is 200mA + (VIN=1.8V, VOUT=3.3V), High Efficiency is 84% (typ.), Stand-by capability is ISTB=0.5A (max.), Selection is Soft start set-up external Output Voltage set-up internal (VOUT), Output Voltage set-up external (FB), Package is SOT-25.
      Here are some notes of XC6367/68  on use.Take ample care to ensure that none of the IC's, nor the external component's, absolute maximum ratings are exceeded. Be extremely careful when selecting parts and do not limit your reference to the specifications and characteristics for the DC/DC converter alone. The IC also depends, to a great extent, upon the external components. Arrange the peripherals in the environs of the IC. In order to reduce wiring impedance, use short, thick wires. In particular, wire the load capacitor as close as possible and strengthen the ground wiring sufficiently. Ground current during switching may cause the XC6367/68  IC's operations to become unstable due to changes in ground voltage, so please strengthen the IC's GND pin surroundings.