RT8816C Datasheet | Richtek

Description The RT8816C is a 2/1 phase synchronous Buck PWM controller which is optimized for high performance graphic microprocessor and puter applications. The IC integrates a Constant-On-Time (COT) PWM controller, two MOSFET drivers with internal bootstrap diodes, as well as channel current balance and protection functions including over-voltage protection (OVP), under-voltage protection (UVP), current limit, and thermal shutdown into the WQFN-20L 3x3 package. The RT8816C adopts RDS(ON) current sensing technique. Current limit is acplished through continuous inductorcurrent-sense, while RDS(ON) current sensing is used for accurate channel current balance. Using the method of current sampling utilizes the best advantages of each technique. The RT8816C features external reference input and PWMVID dynamic output voltage control, in which the feedback voltage is regulated and tracks external input reference voltage. Other features include adjustable switching frequency, dynamic phase number control, internal softstart, power good indicator, and enable functions. Features - Dual-Phase PWM Controller - Power State Indicator  1P-CCM/2P-CCM/1P-DEM/2P-DEM - Two Embedded MOSFET Drivers and Embedded Switching Boot Diode - Support 1.8V PWM-VID Interface - External Reference Input Control - PWM-VID Dynamic Voltage Control - Dynamic Phase Number Control - Lossless RDS(ON) Current Sensing for Current Balance - Internal/External Soft-Start - Adjustable Current Limit Threshold - Adjustable Switching Frequency - UVP/OVP Protection - Shoot Through Protection and Short Pulse Free Technology - Support an Ultra-Low Output Voltage as Standby Voltage - Thermal Shutdown - Power Good Indicator (EN to PG high = 500μs) Simplified Application Circuit VPVCC VIN PGOOD VPSI Enable PVCC BOOT1 UGATE1 PHASE1 LGATE1 OCSET/SS PGOOD PSI EN GND BOOT2 UGATE2 PHASE2 LGATE2 RGND VSNS VIN...