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WM8321 数据表(PDF) 93 Page - Wolfson Microelectronics plc

部件名 WM8321
功能描述  Processor Power Management Subsystem
PDF  253 Pages
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制造商  WOLFSON [Wolfson Microelectronics plc]
网页  http://www.wolfsonmicro.com
标志 WOLFSON - Wolfson Microelectronics plc

WM8321 数据表(HTML) 93 Page - Wolfson Microelectronics plc

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Production Data
WM8321
w
PD, February 2012, Rev 4.0
93
WM8321
DC4_SLV = 1
DC3LX
DC3GND
DC3FB
VO
DC4VDD
2.7V – 5.5V
L
COUT
CIN
DC4LX
DC4FB
VO
L
COUT
DC3VDD
CIN
DC4GND
Load
Figure 21 DC-DC3 / DC-DC4 Dual Mode Converter Connections
The recommended output capacitor COUT varies according to the required transient response. Note
that the DCm_CAP register field must be set according to the output capacitance on each DC-DC
Converter in order to achieve best performance.
See Section 30.3 for details of specific recommended external components.
15.15 LDO REGULATOR OPERATION
15.15.1 OVERVIEW
The WM8321 provides 11 LDO Regulators. Four of these are low-noise analogue LDOs. One of the
LDO Regulators (LDO11) can be configured to be enabled even when the WM8321 is in the OFF
state. The principal characteristics of the LDO Regulators are shown below.
LDO1
LDO2, 3
LDO4, 5, 6
LDO7, 8
LDO9, 10
LDO11
Converter Type
General
Purpose
General
Purpose
General
Purpose
Analogue
Analogue
General
Purpose
Input Voltage Range
1.5V to 5.5V
1.5V to 5.5V
1.5V to 5.5V
1.71V to 5.5V
1.71V to 5.5V
1.8V to 5.5V
Output Voltage Range
0.9V to 3.3V
0.9V to 3.3V
0.9V to 3.3V
1.0V to 3.5V
1.0V to 3.5V
0.8V to 1.55V
Load Current Rating
Up to 300mA
Up to
200mA
Up to
100mA
Up to 200mA
Up to 150mA
Up to 25mA
Pass device
impedance @ 2.5V
1
1
2
1
2
n/a
Table 43 LDO Regulator Overview



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