Using the SMP as a Step-down Converter | Cypress Semiconductor
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Using the SMP as a Step-down Converter
Last Updated: November 30, 2010
Can the SMP be used as a step down converter with a PFET as a switch?
Yes. The Switch Mode Pump (SMP) runs at 1.3MHz, so you need to watch what loads you put on it. You should provide a shunt path to the FET to provide a 100uA starting current.