General Description

The RT8223N is a dual step-down, switch-mode power supply controller generating logic-supply voltages in battery-powered systems. It includes two Pulse Width Modulation (PWM) controllers adjustable from 2V to 5.5V, and also features fixed 5V/3.3V linear regulators.

Features

Constant On-time Control with 100ns Load Step Response

Wide Input Voltage Range : 6V to 25V

Dual Adjustable Outputs from 2V to 5.5V

Fixed 3.3V and 5V LDO Output : 100mA

2V Reference Voltage

Frequency Selectable via TONSEL Setting

4700ppm/°C RDS(ON)Current Sensing

Programmable Current Limit Combined with Enable Control

Selectable PWM, DEM, or Ultrasonic Mode

Internal Soft-Start and Soft-Discharge

High Efficiency up to 97%

5mW Quiescent Power Dissipation

Thermal Shutdown

RoHS Compliant and Halogen Free

Applications

Notebook and Sub-Notebook Computers

3-Cell and 4-Cell Li+ Battery-Powered Devices