Richtek RT8816BGQW

降压降压4.5V ~ 5.5V

Overview

The RT8816BGQW is a 2/1 phase synchronous Buck PWM controller which is optimized for high performance graphic microprocessor and computer 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 RT8816BGQW adopts RDS(ON) current sensing technique. Current limit is accomplished through continuous inductor-current-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 RT8816BGQW features external reference input and PWM-VID 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 soft-start, power good indicator, and enable functions.

Features

Tape & Reel (TR) Package
Transistor Driver Output Type
Positive Output Configuration
Buck Topology
2 Number of Outputs
2 Output Phases
4.5V ~ 5.5V Voltage - Supply (Vcc/Vdd)
250kHz ~ 750kHz Frequency - Switching
Yes Synchronous Rectifier
No Clock Sync
Current Limit, Dead Time, Frequency Control, Phase Control, Power Good, Ramp, Soft Start, Tracking Control Features
Surface Mount Mounting Type