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WM8311 Datasheet(PDF) 294 Page - Wolfson Microelectronics plc

Part # WM8311
Description  Processor Power Management Subsystem
PDF  302 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8311 Datasheet(HTML) 294 Page - Wolfson Microelectronics plc

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WM8311
Pre-Production
w
PP, May 2012, Rev 3.1
294
30.5 LDO REGULATOR EXTERNAL COMPONENTS
The recommended connections to the LDO Regulators are illustrated in Figure 43.
Figure 43 LDO Regulators External Components
When selecting suitable capacitors, is it imperative that the effective capacitance is within the
required limits at the applicable input/output voltage of the converter. Ceramic X7R or X5R types are
recommended.
Wolfson recommends the following external components for use with LDO Regulators 1 to 5.
COMPONENT
VALUE
PART NUMBER
SIZE
COUT
2.2μF
Kemet C0402C225M9PAC
0402
CIN
1.0μF
MuRata GRM155R61A105KE15
0402
Table 118 Recommended External Components - LDO1 to LDO5
Wolfson recommends the following external components for use with LDO Regulator 7. For this
regulator, note that it is important that the output capacitance, COUT, does not exceed 4.7F.
COMPONENT
VALUE
PART NUMBER
SIZE
COUT
1.0μF
MuRata GRM155R61A105KE15
0402
CIN
1.0μF
MuRata GRM155R61A105KE15
0402
Table 119 Recommended External Components - LDO7
Wolfson recommends the following external components for use with LDO Regulators 11 to 13.
COMPONENT
VALUE
PART NUMBER
SIZE
COUT (LDO11)
0.1μF
MuRata GRM033R60J104KE19
0201
COUT (LDO12)
0.1μF
MuRata GRM033R60J104KE19
0201
COUT (LDO13)
2.2μF
Kemet C0402C225M9PAC
0402
Table 120 Recommended External Components - LDO11 to LDO13



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