Listed below are the reference design's key specifications, detailed schematic ( Figure 1 ), and bill of materials ( Table 1 ).
Design specifications and configurations
Wide input voltage range of 2.7V to 11V
70V output voltage
4mA output current
400kHz fixed switching frequency
-40°C to +125°C operating temperature range
Miniature, 8mm x 12mm board size
Figure 1 shows the schematic of the reference design with an input voltage range of 2.7V to 5.5V. By connecting the CP pin to V IN and removing the charge pump capacitor (C3), the circuit accepts a 5.5V to 11V input range.
Figure 1. MAX15031 boost converter schematic, F SW = 400kHz (fixed).
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