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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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RT9246APC датащи(PDF) 1 Page - Richtek Technology Corporation |
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RT9246APC датащи(HTML) 1 Page - Richtek Technology Corporation |
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1 / 16 page  RT9246A 1 DS9246A-04 March 2007 www.richtek.com Multi-Phase PWM Controller for CPU Core Power Supply Ordering Information General Description The RT9246A is a multi-phase buck DC/DC controller integrated with all control functions for GHz CPU VRM. The RT9246A controls 2 or 3 buck switching stages operating in interleaved phase set automatically. The multi- phase architecture provides high output current while maintaining low power dissipation on power devices and low stress on input and output capacitors. The high equivalent operating frequency also reduces the component dimension and the output voltage ripple in load transient. RT9246Acontrols both voltage and current loops to achieve good regulation, response & power stage thermal balance. Precise current loop using Inductor DCR as sense component builds precise load line for strict VRM DC & transient specification and also ensures thermal balance of different power stages. The settings of current sense, droop tuning, VCORE initial offset and over current protection are independent to compensation circuit of voltage loop. The feature greatly facilitates the flexibility of CPU power supply design and tuning. The DAC output of RT9246A supports K8 CPU by 5-bit VID input, precise initial value & smooth VCORE transient at VID jump. The IC monitors the VCORE voltage for PGOOD and over-voltage protection. Soft-start, over-current protection and programmable under-voltage lockout are also provided to assure the safety of microprocessor and power system. Features Multi-Phase Power Conversion with Automatic Phase Selection K8 DAC Output with Active Droop Compensation for Fast Load Transient Smooth VCORE Transition at VID Jump Power Stage Thermal Balance by Inductor DCR Current Sense Hiccup Mode Over-Current Protection Programmable Switching Frequency (50kHz to 400kHz per Phase), Under-Voltage Lockout and Soft-Start High Ripple Frequency Times Channel Number RoHS Compliant and 100% Lead (Pb)-Free Applications AMD® AthlonTM 64 and OpteronTM Processors Voltage Regulator Low Output Voltage, High Current DC-DC Converters Voltage Regulator Modules Pin Configurations (TOP VIEW) TSSOP-28 VID4 VID3 VID1 VID0 NC PWM3 PWM2 VCC NC FBRTN ISP2 ISP1 PWM1 ISP3 COMP PGOOD GND NC DVD SS IOUT ADJ RT VOSS IMAX ICOMMON VID2 FB 6 7 8 17 18 19 9 10 11 15 16 12 13 14 4 5 20 21 22 2 3 23 24 25 26 27 28 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. RT9246A Package Type C : TSSOP-28 Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commer- cial Standard) |
Аналогичный номер детали - RT9246APC |
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Аналогичное описание - RT9246APC |
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