General Description
The RT8223L/M 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. Each linear regulator provides up to 100mA output current with automatic linear regulator bootstrapping to the PWM outputs. The RT8223L/M includes on-board power up sequencing, a power good output, internal soft-start, and soft-discharge output that prevents negative voltage during shutdown.

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