In summary, the LTC3245 is a versatile 250mA high voltage buck-boost charge pump. The LTC3245 uses switched capacitor fractional conversion to maintain regulation over a wide range of input voltage from 2.7V to 38V and produces a regulated output of 3.3V, 5V or adjustable from 2.5V to 5V. Internal circuitry automatically selects the conversion ratio (2:1, 1:1 or 1:2) to optimize efficiency as input voltage and load conditions vary. Low operating current of 18μA with no load or 4μA in shutdown and low external device count with only three small ceramic capacitors and no inductors, make the LTC3245 ideally suited for low power, space constrained automotive & industrial applications.

