WM8351CGEB/RV WOLFSON [Wolfson Microelectronics plc], WM8351CGEB/RV Datasheet - Page 139

• Manufacturer Part Number: WM8351CGEB/RV
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

Production Data
14.8 DC-DC CONVERTER OPERATION
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14.8.1
Table 90 DC-DC Converter Characteristics
The WM8351 provides four DC-DC switching converters. Three of these are Buck (Step-down)
converters and one is a Boost (Step-up) converter. The principal characteristics and typical usage for
each DC-DC converter are shown below.
Typical Application
Converter Type
Input Voltage Range
Output Voltage Range
Load Current Rating
Switching Frequency
OVERVIEW
0.85V to 3.4V
Other system
(may be limited
by application)
components
Step-down
DC-DC 1
Up to 1A
2.0MHz
Constant-current LED
using external NFET
drivers or I/O supply
170mA @ 5V
40mA @ 20V
2.7V to 5.5V
5V to 20V
DC-DC 2
Step-up,
1.0MHz
WM8351 and other
Digital supply for
(may be limited by
0.85V to 3.4V
Up to 500mA
components
DC-DC 3 / 4
Step-down
application)
PD, April 2012, Rev 4.5
2.0MHz
WM8351
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