RT8820A Datasheet | Richtek

Description The RT8820A 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 RT8820A 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 RT8820A 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. Ordering Information RT8820A Package Type QW : WQFN-20L 3x3 (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) Note : Richtek products are :  Ro HS pliant and patible with the current requirements of IPC/JEDEC J-STD-020.  Suitable for use in Sn Pb or Pb-free soldering processes. Marking Information KP= : Product Code KP=YM DNN YMDNN : Date Code Copyright ©2020 Richtek Technology Corporation. All rights reserved. DS8820A-01 February 2020 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...