Evaluation Board For IR3840W

The IR3840W is a synchronous buck converter, providing a compact, high performance and flexible solution in a small 5mmx6mm Power QFN package. Key features offered by the IR3840W include programmable soft-start ramp, precision 0.7V reference voltage, Power Good, thermal protection, programmable switching frequency, Sequence input, Enable input, input under-voltage lockout for proper start-up, and pre-bias start-up. An output over-current protection function is implemented by sensing the voltage developed across the on-resistance of the synchronous rectifier MOSFET for optimum cost and performance.

• Vin = +12V (13.2V Max)
• Vcc=+5V (5.5V Max)
• Vout = +1.8V @ 0- 12A
• Fs=600kHz
• L= 0.6uH
• Cin= 4x10uF (ceramic 1206) + 330uF (electrolytic)
• Cout= 6x22uF (ceramic 0805)