The RT9605A is a high frequency, triple-channelsynchronous-rectified buck MOSFET driver specificallydesigned to drive six power N-Channel MOSFETs. Thepart is promoted to pair with RichTek's multiphase buckPWM controller family for high-density power supplyimplementation. The output drivers of RT9605A canefficiently switch power MOSFETs at frequency 300kHztypically. Operating in higher frequency should considerthe thermal dissipation carefully. Each driver of RT9605Ais capable to drive a 3nF load in 30/40ns rising/fallingtime with little propagation delay from input transition tothe gate of the power MOSFET. The device implementsbootstrapping on the upper gate with only an externalcapacitor and a diode required. This reduces circuitcomplexity and allows the use of higher performance, costeffective N-Channel MOSFETs. All drivers incorporateadaptive shoot-through protection to prevent upper andlower MOSFETs from conducting simultaneously andshorting the input supply. The RT9605A also detects thefault condition during initial start-up prior to the multi-phasePWM controller takes control. As a result, the input supplywill latch into the shutdown state. The RT9605A comesto a small footprint package with VQFN-24L 4x4 package.
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