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RT9228 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT9228 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 8 page  RT9228 1 DS9228-06 March 2007 www.richtek.com Features 3-in-one Regulated Voltages for Microprocessor Core, Clock, and GTL Compatible with HIP6016 Power-good Output Voltage Monitor Switching Section 5-bit DAC Programmable from 1.3V to 3.5V ±±±±± 1% DAC Accuracy Fast Transient Response Full 0% to 100% Duty Cycle Driver Fixed 200kHz Switching Frequency Adaptive Non-Overlapping Gate Driver Over-Current Monitor Uses MOSFET RDS(ON) Over-Voltage Protection Uses Lower MOSFET Linear Section Fixed Linear Regulator Output Voltage MOSFET or NPN Driving Capability Ultra Fast Response Speed Under-Voltage Protection Internal Thermal Shutdown RoHS Compliant and 100% Lead (Pb)-Free Pin Configurations Applications Full Motherboard Power Regulation for Computer Low-voltage Distributed Power Supplies Ordering Information General Description The RT9228 is a 3-in-one power controller optimized for high-performance microprocessor and computer applications. The IC integrates a synchronous buck PWM controller, a linear regulator, and a linear controller as well as monitoring and protection functions into a 24-pin SOP package. The PWM controller regulates the microprocessor core voltage. The linear regulator provides power for the clock driver circuit and the linear controller regulates power for the GTL bus. The RT9228 features an Intel-compatible, TTL 5-bit programmable DAC that adjusts the core voltage from 2.1V to 3.5V in 0.1V increments and from 1.3V to 2.05V in 0.05V steps. The 5-bit DAC has a typical ±±±±±1% tolerance. The linear regulator uses an internal drive device to provide 2.5V ±±±±±2.5% output voltage. The linear controller drives an external N-Channel MOSFET or a low cost NPN bipolar transistor to provide 1.5V ±±±±±2.5%. The RT9228 monitors all the output voltages. A Power- good signal is issued when the core voltage is within ±±±±±10% of the DAC setting and the other levels are above their under-voltage levels. Additional build-in over-voltage protection for the core output uses the lower MOSFET to prevent output voltage above 115% of the DAC setting. The PWM over-current function monitors the output current using the voltage drop across the upper MOSFET's RDS(ON), which eliminates the need for a current sensing resistor. (TOP VIEW) SOP-24 Advanced PWM and Dual Fixed Linear Power Controller VCC VID4 VID3 VID2 OCSET1 PGND LGATE1 UGATE1 VID1 VID0 FB1 VSEN1 PGOOD PHASE1 NC FAULT SS GATE3 FB3 NC FB2 VOUT2 GND VIN2 4 5 6 19 20 21 7 8 9 16 17 18 10 11 12 13 14 15 2 3 22 23 24 Note : RichTek Pb-free and Green 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. 100%matte tin (Sn) plating. RT9228 Package Type S : SOP-24 Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commer- cial Standard) |
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Similar Description - RT9228 |
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