Synchronous Rectified Buck MOSFET Drivers

The RT9611A/B is a high frequency, synchronous rectified, single phase dual MOSFET driver designed to adapt from normal MOSFET driving applications to high performance CPU VR driving capabilities.
The RT9611A/B can be utilized under both V_CC = 5V or V_CC  = 12V applications. The RT9611A/B also builds in an internal power switch to replace external boot strap diode. The RT9611A/B can support switching frequency efficiently up to 500kHz. The RT9611A/B has the UGATE driving circuit and the LGATE driving circuit for synchronous rectified DC/DC converter applications. The driving rise/fall time capability is designed within 30ns and the shoot through protection mechanism is designed to prevent shoot through of high side and low side power MOSFETs. The RT9611A/B has PWM tri-state shut down and OD input shut down functions which can force driver output into high impedance.
The difference of the RT9611A and the RT9611B is the propagation delay, t_UGATEpdh. The RT9611B has comparatively large t_UGATEpdh than RT9611B. Hence, the RT9611A is usually recommended to be utilized in performance oriented applications, such as high power density CPU VR or GPU VR.
The RT9611A/B comes in a small footprint with 8-pin packages. The choice of packages type includes SOP-8, SOP-8 (Exposed Pad) and WDFN-8EL 3x3.