RT9603 Datasheet | Richiek

Description The RT9603 is a high frequency, dual MOSFET drivers specifically designed to drive two power N-Channel MOSFETs in a synchronous-rectified buck converter topology. The device bined with the RT924x series of multi-phase PWM controllers and MOSFETs form a plete core voltage regulator solution for advanced microprocessors. The output drivers in the RT9603 can efficiently switch power MOSFETs at frequencies up to 500k Hz. It shall be taken into account the thermal consideration when the switching frequency above 500k Hz. Each driver is capable of driving a 3n F load in 30/40ns rise/fall time with fast 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 implementation plexity and allows the use of higher performance, cost effective N-Channel MOSFETs. Both drivers incorporate adaptive shoot-through protection to prevent upper and lower MOSFETs from conducting simultaneously and shorting the input supply. An unique feature of the RT9603 driver is the addition of over-voltage protection in the event of upper MOSFET direct shorted before power-on. The RT9603 detects the fault condition during initial start-up, the internal poweron OVP sense circuitry will rapidly drive the output lower MOSFET on before the multi-phase PWM controller takes control. As a result, the input supply will latch into the shutdown state, thereby prevent the processor from damaged. Features l l l l l l l l Drives Two N-Channel MOSFETs Adaptive Shoot-Through Protection Supports High Switching Frequency - Fast Output Rise Time - Propagation Delay 40ns Tri-State Input for Bridge Shutdown Supply Over-Voltage Protection above Maximum Voltage Rating Supply Under-Voltage Protection Upper MOSFET Direct Shorted Protection Small SOP-8 Package Applications l l l l Core Voltage Supplies for Intel Pentium® 4, AMD® Athlon TM Microprocessors High Frequency Low...