IR3823 Synchronous Buck Regulator Design Kit

The IR3823 is a synchronous buck converter, providing a compact, high performance and flexible solution in a small 3.5mm X 3.5 mm Power QFN package. Key features offered by the IR3823 include selectable Digital Soft Start, precision 0.6Vreference voltage, Power Good, thermal protection, programmable switching frequency, Enable input, input under-voltage lockout for proper start-up, enhanced line/ load regulation with feed forward, external frequency synchronization with smooth clocking, internal LDO and pre-bias start-up. Output over-current protection function is implemented by sensing the voltage developed across the on-resistance of the synchronous MOSFET for optimum cost and performance and the current limit is thermally compensated.

• Vin = +12V (+ 13.2V Max)
• Vout = +1.2V @ 0- 3A
• Fs=1000kHz
• L= 1.0uH (4.0mm X 4.0mm X 2.1mm, DCR=10.8m?)
• Cin= 2x10uF (25V, ceramic 1206) + 1X100uF (25V, electrolytic)
• Cout=1x22uF (6.3V, ceramic 0805)