General Description

The RT6220 is a synchronous Buck converter with

Advanced Constant On-Time (ACOT® ) mode control, which

provides a very fast transient response with no external

compensators. The RT6220 operates from 4.5V to 23V

input voltage, provides complete protection functions

including Over Current Protection (OCP), Under Voltage

Protection (UVP) and Over Voltage Protection (OVP). This

IC also provides a 1.5ms internal soft-start function and

an open-drain power good indicator.

Features

 4.5V to 23V Input Voltage Range

 Adjustable from 0.6V to 5V Output Range

 Up to 98 Duty for 2S Battery Application

 500kHz Switching Frequency

 ACOT® Mode Performs Fast Transient Response

 Integrated MOSFETs

 31mΩ of High-Side MOSFET

 20mΩ of Low-Side MOSFET

 Supports MLCC Output Capacitors

 Internal Soft-Start (1.5ms typ)

 Built-in OVP/UVP/OCP

 Power Good Indicator

 Thermal Shutdown

Applications

 Laptop Computers

 Tablet PCs

 Networking Systems

 Servers

 Personal Video Recorders

 Flat Panel Television and Monitors

 Distributed Power Systems