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WM8310 bảng dữ liệu(PDF) 98 Page - Wolfson Microelectronics plc

tên linh kiện WM8310
Giải thích chi tiết về linh kiện  Processor Power Management Subsystem
PDF  291 Pages
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nhà sản xuất  WOLFSON [Wolfson Microelectronics plc]
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WM8310 bảng dữ liệu(HTML) 98 Page - Wolfson Microelectronics plc

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WM8310
Pre-Production
w
PP, May 2012, Rev 3.1
98
The LDOs 1-10 can also operate as current-limited switches, with no voltage regulation; this is useful
for ‘Hot Swap’ outputs, i.e. supply rails for external devices that are plugged in when the system is
already powered up - the current-limiting function prevents the in-rush current into the external device
from disturbing other system power supplies.
The input voltage to these LDOs is provided on pin LDO1VDD through to LDO10VDD respectively.
The LDO input supply pins are typically connected to the SYSVDD voltage node, or else can be
connected to the output pin of one of the DC-DC buck converters. Note that the internal supply pins
PVDD1 and PVDD2 should also be connected to SYSVDD.
LDO11 is a configurable LDO intended for ‘always-on’ functions external to the WM8310. The
WM8310 contains a further two non-configurable LDOs which support internal functions only.
The connections to LDO Regulator 1 are illustrated in Figure 22. The equivalent circuit applies to
LDO2 through to LDO10.
Figure 22 LDO Regulator Connections
An input and output capacitor are recommended for each LDO Regulator, as illustrated above.
See Section 30.5 for details of specific recommended external components.



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