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RT8223N

Richtek
Part Number RT8223N
Manufacturer Richtek
Description Main Power Supply Controller
Published May 26, 2016
Detailed Description RT8223N High Efficiency, Main Power Supply Controller for Notebook Computer General Description The RT8223N is a dual ...
Datasheet PDF File RT8223N PDF File

RT8223N
RT8223N

Overview
RT8223N High Efficiency, Main Power Supply Controller for Notebook Computer 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.
Each linear regulator provides up to 100mA output current with automatic linear regulator bootstrapping to the PWM outputs.
The RT8223N includes on-board power up sequencing, a power good output, internal soft-start, and soft-discharge output that prevents negative voltage during shutdown.
The constant on-time PWM scheme can operate without sense resistors and provide 100ns load transient response while maintaining nearly constant switching frequency.
To eliminate noise in audio applications, an ultrasonic mode is included, which maintains the switching frequency above 25kHz.
Moreover, the diode-emulation mode maximizes efficiency for light load applications.
The RT8223N is available in a WQFN-24L 4x4 package.
Features z Constant On-time Control with 100ns Load Step Response z Wide Input Voltage Range : 6V to 25V z Dual Adjustable Outputs from 2V to 5.
5V z Fixed 3.
3V and 5V LDO Output : 100mA z 2V Reference Voltage z Frequency Selectable via TONSEL Setting z 4700ppm/°C RDS(ON) Current Sensing z Programmable Current Limit Combined with Enable Control z Selectable PWM, DEM, or Ultrasonic Mode z Internal Soft-Start and Soft-Discharge z High Efficiency up to 97% z 5mW Quiescent Power Dissipation z Thermal Shutdown z RoHS Compliant and Halogen Free Applications z Notebook and Sub-Notebook Computers z 3-Cell and 4-Cell Li+ Battery-Powered Devices Ordering Information RT8223N Package Type QW : WQFN-24L 4x4 (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) Z : ECO (Ecological Element with Halogen Free and Pb free) Note : Richtek products are : ` RoHS compliant and compatible with the current require...


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