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℃