MP2562 – 1A, 4MHz, 50V STEP-DOWN CONVERTER
This diode is also recommended for high duty
cycle operation (when VOUT/VIN >65%) or low
VIN (<5Vin) applications.
At no load or light load, the converter may
operate in pulse skipping mode in order to
maintain the output voltage in regulation. Thus
there is less time to refresh the BS voltage. In
order to have enough gate voltage under such
operating conditions, the difference of (VIN
–
VOUT) should be greater than 3V. For example,
if the VOUT is set to 3.3V, the VIN needs to be
higher than 3.3V+3V=6.3V to maintain enough
BS voltage at no load or light load. To meet this
requirement, EN pin can be used to program
the input UVLO voltage to Vout+3V.
MP2562 Rev. 1.0
2/28/2014
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