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RT9218BGS Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT9218BGS Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 17 page  RT9218B 1 DS9218B-09 March 2007 www.richtek.com Features Operating with 12V Supply Voltage Drives All Low Cost N-MOSFETs Voltage Mode PWM Control 300kHz Fixed Frequency Oscillator Fast Transient Response : High-Speed GM Amplifier Full 0 to 100% Duty Ration Internal Soft-Start Power Good Indicator Adaptive Non-Overlapping Gate Driver Over-Current Fault Monitor on MOSFET, No Current Sense Resistor Required Specific power good indicator for Intel® Grantsdale FSB_VTT power sequence RoHS Compliant and 100% Lead (Pb)-Free 12V Synchronous Buck PWM DC-DC and Linear Power Controller General Description The RT9218B is a dual output with one synchronous buck PWM and one linear controller. The part is proposed to generate logic-supply voltages for PC based systems. The high-performance device includes internal soft-start, frequency-compensation networks, power good signaling with specific sequence, and it comes all of the logic control, output adjustment, power monitoring and protection functions into a small footprint package. The part is operated at fixed 300kHz frequeny providing an optimum compromise between efficiency, external component size, and cost. The linear controller is implemented to drive an external MOSFET for regulation and it's adjustable by setting external resistors. Moreover the specific internal PGOOD sequence and indicator is also implemented to conform to Intel® new platform requirement on FSB_VTT power plane. An adjustable over-current protection (OCP) is proposed to monitor the voltage drop across the RDS(ON) of the lower MOSFET for synchronous buck PWM DC-DC controller. Ordering Information Applications Graphic Card Motherboard, Desktop Servers IA Equipments Telecomm Equipments High Power DC-DC Regulators Pin Configurations (TOP VIEW) SOP-14 NC DRV GND UGATE NC OPS LGATE NC FBL PGOOD BOOT FB PHASE VCC 2 3 4 11 12 13 14 5 6 7 8 9 10 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. Package Type S : SOP-14 RT9218B Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commer- cial Standard) |
Similar Part No. - RT9218BGS |
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Similar Description - RT9218BGS |
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