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WM8352 Datasheet(PDF) 140 Page - Wolfson Microelectronics plc |
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WM8352 Datasheet(HTML) 140 Page - Wolfson Microelectronics plc |
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140 / 336 page  WM8352 Production Data w PD, February 2011, Rev 4.4 140 14.8 DC-DC CONVERTER OPERATION 14.8.1 OVERVIEW 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. DC-DC 1 / 6 DC-DC 2 / 5 DC-DC 3 / 4 Typical Application Other system components Constant-current LED drivers or I/O supply Digital supply for WM8352 and other components Converter Type Step-down Step-up, using external NFET Step-down Input Voltage Range 2.7V to 5.5V Output Voltage Range 0.85V to 3.4V 5V to 20V 0.85V to 3.4V Load Current Rating Up to 1A (may be limited by application) 170mA @ 5V 40mA @ 20V Up to 500mA (may be limited by application) Switching Frequency 2.0MHz 1.0MHz 2.0MHz Table 90 DC-DC Converter Characteristics |
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