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RT8206M Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT8206M Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 27 page  RT8206L/M ® DS8206L/M-07 June 2012 www.richtek.com 1 © Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Ordering Information High Efficiency, Main Power Supply Controller for Notebook Computers General Description The RT8206L/M dual step-down, Switch-Mode Power- Supply (SMPS) controller generates logic-supply voltages in battery-powered systems. The RT8206L/M includes two Pulse-Width Modulation (PWM) controllers fixed at 5V/ 3.3V or adjustable from 2V to 5.5V. An optional external charge pump can be monitored through SECFB (RT8206L). This device also features a linear regulator providing a fixed 5V output. The linear regulator provides up to 70mA output current with automatic linear regulator bootstrapping to the BYP input. The RT8206L/M includes on-board power-up sequencing, the power good outputs, internal soft-start, and internal soft-discharge output that prevents negative voltages on shutdown. A constant on-time PWM control scheme operates without sense resistors and provides 100ns response to load transients while maintaining a relatively constant switching frequency. The unique ultrasonic mode maintains the switching frequency above 25kHz, which eliminates noise in audio applications. Other features include Diode- Emulation Mode (DEM), which maximizes efficiency in light-load applications, and fixed frequency PWM mode, which reduces RF interference in sensitive application. The RT8206L/M is available in a WQFN-32L 5x5 package. Features Wide Input Voltage Range 6V to 25V Dual Fixed 5V/3.3V Outputs or Adjustable from 2V to 5.5V, 1.5% Accuracy Secondary Feedback Input Maintains Charge Pump Voltage (RT8206L) Independent Enable and Power Good 5V Fixed LDO Output : 70mA 2V Reference Voltage ±±±±±1% : 50μμμμμA Constant ON-Time Control with 100ns Load Step Response Frequency Selectable via TON Setting RDS(ON) Current Sensing and Programmable Current Limit 4700ppm/ °°°°°C RDS(ON) Current Sensing Selectable PWM, DEM or Ultrasonic Mode Internal Soft-Start with Current Limiting 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 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. Package Type QW : WQFN-32L 5x5 (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) Z : ECO (Ecological Element with Halogen Free and Pb free) RT8206 L : With SECFB M : Without SECFB |
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