RT9641B Richtek Technology Corporation, RT9641B Datasheet
RT9641B
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RT9641B Summary of contents
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... ACPI Control Interface 5V Active/Sleep(5V ) DUAL 3.3V Active/Sleep(3.3V ) DUAL 2.5V/3.3V Active/Sleep(V ) with RT9641A MEM 2V/3.43V Active and 2.5V/3.3V Sleep(V RT9641B No Compensation Required 3.3V Output : ±2.0% ; Sleep States Only DUAL 2.5V/3.3V (2.6V/3.43V) Output : Operational States Small External Component Count 2.5V/2.6V for RDRAM Memory 3.3V/3.43V for SDRAM Memory Package Type ...
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RT9641A/B Pin Configurations T0P VIEW 5VSB EN3VDL 3 14 3V3DLSB 4 13 3V3DL EN5VDL GND SOP-16 Package Typical Application Circuit +5V IN +12V IN +3.3V IN +5V ...
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Function Block Diagram 12V 12V Bias 12V Monitor 10.5V/9.5V FAULT/MSEL Detector + 40uA 5VDL Simplified Power System Diagram 5V IN 12V 3.3V IN 3.3V DUAL FAULT SHUTDOWN S3 S5 EN5VLD EN3VDL 3V3DLSB 3V3DL EA4 - + UV ...
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RT9641A/B Absolute Maximum Ratings Supply Voltage (V ) -------------------------------------------------------------------------------------- +7.0V 5VSB 12V -------------------------------------------------------------------------------------------------------------- GND 0.3V to +14.5V DLA, DRV2 ----------------------------------------------------------------------------------------------------- GND 0. All Other Pins ------------------------------------------------------------------------------------------------- GND 0.3V to 5VSB+0.3V Package Thermal Resistance SOP-16, ---------------------------------------------------------------------------------------------------- 100° C/W JA ...
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Parameter 2.5V/3.3V (2.6V/3.43V) Linear Regulator (V Regulation VSEN2 Nominal Voltage Level VSEN2 Nominal Voltage Level VSEN2 Under-voltage Falling Threshold VSEN2 Under-voltage Hysteresis VSEN2 Output Current DRV2 Output Drive Current DRV2 Output Impedance 3.3V Dual Linear Regulator (V Sleep-mode Regulation 3V3DL ...
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RT9641A/B Functional Pin Description 5VSB (Pin 1) Provide a 5V bias supply for the IC to this pin by connecting it to the ATX 5VSB output. This pin also provides the base bias current for all the external NPN transistors ...
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VSEN2 (Pin 16) Connect this pin to the memory output ( through an internal pass transistor capable of delivering 300mA (Typically). The active-state voltage at this pin is SEL regulated through an external NPN or NMOS transistor ...
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RT9641A/B Table 3. 2.5V/3.3V(2.6V/3.43V) VMEM Output (V Truth Table RSEL S5 S3 2.5V/3.3V 1kΩ 2.5V/2.6V 1kΩ 2.5V 1kΩ Note 1KΩ 10kΩ 3.3V/3.43V 10kΩ 3.3V 10kΩ ...
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IN + 12V 12V 5VSB 5VDLSB 5VDL Q2 C HF1 3V3DLSB V OUT1 3V3DL DLA RT9641A/B C BULK1 VSEN2 Q3 DRV2 GND +3.3V IN ISLAND ON POWAR PLANE LAYER ISLAND ON CIRCUIT/POWER PLANE LAYER ...
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RT9641A/B Transistor Selection/Considerations capacitors. The RT9641A/B typically requires one P-channel or PNP transistor and two N-channel power MOSFETs and two bipolar NPN transistors. One general requirement for selection of transistors for all the linear regulators/switching elements is package selection for ...
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Outline Dimension J I Symbol RICHTEK TECHNOLOGY CORP. Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 Dimensions In Millimeters ...