RT8845A - Richtek

RT8845A Multi-Phase PWM Controller

The RT8845A is a 4/3/2/1 phase synchronous Buck PWM controller which is optimized for high performance graphic microprocessor and computer applications. The RT8845A adopts G-NAVPTM (Green Native AVP) which is Richtek's proprietary topology derived from finite DC gain of EA amplifier with current mode control. By utilizing the GNAVPTM topology, the operating .

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/external soft- start, power good indicator, and enable functions. Features
 Multi-Phase PWM Controller
 Power State Indicator  1P-CCM/4P-CCM/1P-DEM
 Support 1.8V PWM-VID Interface
 External Reference Input Control
 PWM-VID Dynamic Voltage Control
 Dynamic Phase Number Control
 Internal/External Soft-Start
 Adjustable Current Limit Thresho.