WM8310 Datasheet, PDF (92/291 Pages) Wolfson Microelectronics plc – Processor Power Management Subsystem

WM8310
ADDRESS
Power Good
Source 2
BIT
LABEL
8
LDO9_OK
7
LDO8_OK
6
LDO7_OK
5
LDO6_OK
4
LDO5_OK
3
LDO4_OK
2
LDO3_OK
1
LDO2_OK
0
LDO1_OK
Table 44 PWR_GOOD (GPIO) Configuration
Pre-Production
DEFAULT
1
1
1
1
1
1
1
1
1
DESCRIPTION
0 = Disabled
1 = Enabled
LDO9 status selected as an input to
PWR_GOOD
0 = Disabled
1 = Enabled
LDO8 status selected as an input to
PWR_GOOD
0 = Disabled
1 = Enabled
LDO7 status selected as an input to
PWR_GOOD
0 = Disabled
1 = Enabled
LDO6 status selected as an input to
PWR_GOOD
0 = Disabled
1 = Enabled
LDO5 status selected as an input to
PWR_GOOD
0 = Disabled
1 = Enabled
LDO4 status selected as an input to
PWR_GOOD
0 = Disabled
1 = Enabled
LDO3 status selected as an input to
PWR_GOOD
0 = Disabled
1 = Enabled
LDO2 status selected as an input to
PWR_GOOD
0 = Disabled
1 = Enabled
LDO1 status selected as an input to
PWR_GOOD
0 = Disabled
1 = Enabled
15.15 DC-DC CONVERTER OPERATION
15.15.1 OVERVIEW
The WM8310 provides four DC-DC switching converters. Three of these are synchronous buck (step-
down) converters; the fourth of these is a boost (step-up) converter. The principal characteristics of
each DC-DC converter are shown below.
DC-DC1 / DC-DC2
DC-DC3
DC-DC4
Converter Type
Buck (step-down)
Buck (step-down)
Boost (step-up)
Input Voltage Range
2.7V to 5.5V (connect to SYSVDD supply)
Output Voltage Range
0.6V to 1.8V
0.85V to 3.4V
5V to 30V
Load Current Rating
Up to 1200mA
Up to 1000mA
Up to 25mA @ 30V
Up to 40mA @ 20V
Up to 90mA @ 8V
Switching Frequency
2MHz or 4MHz
2MHz
1MHz
Table 45 DC-DC Converter Overview
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PP, May 2012, Rev 3.1
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