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PM6641TR Datasheet(PDF) 42 Page - STMicroelectronics

Part # PM6641TR
Description  Monolithic VR for chipset and DDR2/3 supply for ultra-mobile PC (UMPC) applications
PDF  47 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PM6641TR Datasheet(HTML) 42 Page - STMicroelectronics

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Application examples
PM6641
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The default switching frequency has been selected (750 kHz) and the tracking discharge
has been enabled in agreement with DDR2 JEDEC specifications. No external resistor
dividers are required for these output voltage levels. The allowed inductor current ripple is
about 35 % of the expected peak load.
The power and signal components have been selected in agreement with Chapter 8:
Components selection
equations.
The following schematic and bill of materials (BOM) are for reference design.
Figure 35. Suggested schematic for DDR2 and chipset power supply



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