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36V 5A Synchronous Step-down Converter with Dual-Channel Current Limit


  • The MT3901 is a high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated high-side and low-side power MOSFETs. The MT3901 uses proprietary constant on-time (COT) control to provide excellent line and load transient response. The MT3901 features slew rate control and spread spectrum frequency modulation to minimize EMI/EMC emissions. With wide input range from 4V to 36V, the converter can deliver output voltage ranging from 0.8V to VIN with up to 5A continuous output current. The converter can be configured as single output or dual outputs with independent constant current (CC) regulation for each output. In the event of output overload or short circuit, the converter will re-try startup 8 times before latch off. Other protection features include cycle-by-cycle current limit, input under and over voltage protection and thermal shutdown. MT3901 also provides programmable cable voltage drop compensation by selecting appropriate external resistor divider. Switching frequency is internally set to 275kHz. The MT3901 is available in SOP8_EP package.

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