Power Electronics / Power Management


Efficient MOSFET drivers and LDOs

25 November 2009 Power Electronics / Power Management

Microchip released the new MCP14628 and MCP14700 synchronous buck MOSFET drivers and the MCP1804 low dropout regulators (LDOs). The buck converters drive two N-Channel MOSFETs arranged in a non-isolated topology. They both offer excellent latch-up immunity, while the MCP14628 features an enhanced light-load efficiency mode that conserves energy when the power supply is not in full use. The dual input MCP14700 driver is suited for controllers that utilise 3,0 V TTL/CMOS logic, as it can control high and low sides independently and offers flexible timing to accommodate different types of MOSFETs. The MCP1804 LDOs support an input voltage of up to 28 V, producing an output between 1,8 V and 18 V at up to 150 mA. Operating from a typical quiescent current of 50 μA, they also feature a shutdown function which disables the output, dropping the quiescent current to just 0,01 μA.



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