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AN2798 Datasheet(PDF) 25 Page - STMicroelectronics

Part # AN2798
Description  Complete DDR2/3 memory power supply
PDF  38 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2798 Datasheet(HTML) 25 Page - STMicroelectronics

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AN2798
PM6670AS evaluation tests
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Non-tracking discharge
When the non-tracking discharge is programmed (JP2 in the lower position) and S3-S5 are
both tied to GND, each output rail is discharged through its discharge MOSFET, as depicted
in the following picture.
Table 3.
Measured discharge resistance in soft-discharge mode
VDDQ output
VTTREF output
VTT output
Measured N.T.D. discharge
MOSFET’s RDSon
25
Ω
1.5 k
Ω
23
Ω
Figure 28.
VDDQ, VTTREF and VTT, non-tracking discharge, no load on any output



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