The RT9605A is a high frequency, triple-channel
synchronous-rectified buck MOSFET driver specifically
designed to drive six power N-Channel MOSFETs. The
part is promoted to pair with RichTek's multiphase buck
PWM controller family for high-density power supply
implementation. The output drivers of RT9605A can
efficiently switch power MOSFETs at frequency 300kHz
typically. Operating in higher frequency should consider
the thermal dissipation carefully. Each driver of RT9605A
is capable to drive a 3nF load in 30/40ns rising/falling
time with little propagation delay from input transition to
the gate of the power MOSFET. The device implements
bootstrapping on the upper gate with only an external
capacitor and a diode required. This reduces circuit
complexity and allows the use of higher performance, cost
effective N-Channel MOSFETs. All drivers incorporate
adaptive shoot-through protection to prevent upper and
lower MOSFETs from conducting simultaneously and
shorting the input supply. The RT9605A also detects the
fault condition during initial start-up prior to the multi-phase
PWM controller takes control. As a result, the input supply
will latch into the shutdown state. The RT9605A comes
to a small footprint package with VQFN-24L 4x4 package.