Outline The MD3221N is a non-insulated DC-DC converter power IC incorporating a dedicated main switch MOSFET and a synchronous rectification MOSFET. Integration of a control IC and a power device in a single chip minimizes the effects of wiring and simplifies large-current power supply circuit design. ◆Features □ Input voltage range of 4.5V to 20V. □ Adjustable output voltage range of 0.8V to 14V. □ Internal power MOSFET □ High efficiency of 96% (Vi=5V, Vo=3.3V, Io=1A) □ Over-Current protection function (external resistor not required) □ Over temperature protection function □ Remote ON / OFF function (current consumption at OFF : Typ . 25μA) □ Switching frequency of 100kHz or 300kHz (external C.R not required) □ The L Cut (Cut off derect) function □ Ambient temperature range: -30℃ to 85℃
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