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℃