wm8352 Wolfson Microelectronics plc, wm8352 Datasheet - Page 140
wm8352
Manufacturer Part Number
wm8352
Description
Wolfson Audioplus? Stereo Codec With Power Management
Manufacturer
Wolfson Microelectronics plc
Datasheet
1.WM8352.pdf
(335 pages)
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WM8352
14.8 DC-DC CONVERTER OPERATION
w
14.8.1
The WM8352 provides six DC-DC switching converters. Four of these are Buck (Step-down)
converters and two are Boost (Step-up) converters. The principal characteristics and typical usage
for each DC-DC converter are shown below.
Table 89 DC-DC Converter Characteristics
Typical Application
Converter Type
Input Voltage Range
Output Voltage Range
Load Current Rating
Switching Frequency
OVERVIEW
(may be limited
by application)
0.85V to 3.4V
Other system
DC-DC 1 / 6
components
Step-down
2.048MHz
Up to 1A
LED drivers or I/O
Constant-current
using external
170mA @ 5V
40mA @ 20V
DC-DC 2 / 5
2.7V to 5.5V
1.024MHz
5V to 20V
Step-up,
supply
NFET
(may be limited by
other components
Digital supply for
PD, June 2009, Rev 4.1
0.85V to 3.4V
WM8352 and
Up to 500mA
DC-DC 3 / 4
application)
Step-down
2.048MHz
Production Data
140
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