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RT8223M Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT8223M Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 24 page  RT8223L/M 1 DS8223L/M-04 April 2011 www.richtek.com Ordering Information Note : Richtek products are : RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. High Efficiency, Main Power Supply Controller for Notebook Computer 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. 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 RT8223L/M is available in a WQFN-24L 4x4 package. 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 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) RT8223 Pin Function L : Default M : With ENC |
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