RT9619 Datasheet | Richtek

Description The RT9619/A is a high frequency, dual MOSFET driver specifically designed to drive two power N-Channel MOSFETs in a synchronous-rectified buck converter topology. This driver bined with Richtek's series of Multi-Phase Buck PWM controller form a plete corevoltage regulator solution for advanced micro-processors. .. The RT9619/A drives both the lower/upper gate in a synchronous-rectifier bridge with 12V. This drive-voltage flexibility provides the advantage of optimizing applications involving trade-offs between switching losses and conduction losses. RT9619A has longer UGATE/LGATE deadtime which can drive the MOSFETs with large gate RC value, avoiding the shoot-through phenomenon. RT9619 is targeted to drive low gate RC MOSFETs and performs better efficiency. The output drivers in the RT9619/A can efficiently switch power MOSFETs at frequency up to 500k Hz. Switching frequency above 500k Hz has to take into account the thermal dissipation of SOP-8 package. RT9619/A is capable to drive a 3n F load with a 30ns rise time. RT9619/A implements bootstrapping on the upper gate with an external capacitor and an embedded diode. This reduces implementation plexity and allows the use of higher performance, cost effective N-Channel MOSFETs. Adaptive shoot-through protection is integrated to prevent both MOSFETs from conducting simultaneously. Features z z z z z z z z z z Drives Two N-Channel MOSFETs Adaptive Shoot-Through Protection Embedded Boot Strapped Diode Supports High Switching Frequency Fast Output Rise Time Small SOP-8 Package Tri-State Input for Bridge Shutdown Supply Under Voltage Protection Upper MOSFET Direct Shorted Protection Ro HS pliant and 100% Lead (Pb)-Free Applications z z z Core Voltage Supplies for Desktop, Motherboard CPU High Frequency Low Profile DC-DC Converters High Current Low Voltage DC-DC Converters Ordering Information RT9619/A Package Type S : SOP-8 Operating Temperature Range P : Pb Free with mercial Standard G : Green (Halogen...