Microchip claims that its MCP1256/7/8/9 family of positively-regulated charge pump DC-DC converters are amongst the most efficient charge pumps in the industry. The fractional charge pumps automatically switch between 1,5x and 2x boost operation to increase efficiency. At light output loads, the MCP1256 and MCP1257 can be placed in a 'Sleep' mode, where quiescent current is lowered but regulated output voltage stays the same. Additionally, the MCP1258 and MCP1259 devices provide a bypass feature that connects the input voltage to the output, which provides a bias voltage for the system with virtually no power drain from the charge pump itself. All of the MCP125X devices have a low-noise output ripple of less than 10 mVpp at load currents up to 100 mA, resulting in less system interference and better overall performance. Other features include soft start, short-circuit protection and thermal protection. In addition, they operate over an extended temperature range -40 to 125°C. They are available in 10-pin MSOP or 3x3 mm DFN packages.
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