Step_down_P_channel_controllers

Published:2009/7/24 1:48:00 Author:Jessie | From:SeekIC

Figure 7-42 shows the MAX747 connected to provide +5 V at 2.3 A with a 7.5-V to 15-V input. Figure 7-43 shows the MAX747 connected to provide +3.3 V at 2.3 A with a 4.5-V to 15-V input. Figure 7-44 shows the calculations required for the low-battery detector circuit. LBO goes low when V+ is equal to or less than VTRIP. LBO is high impedance in the shutdown mode. Figure 7-45 shows the calculations required to adjust the output from 2 V to 14 V. The value of C6 is calculated using:where C1 is the value of C1 in μF, and ESRC1 (effective series resistance of C1 at 100 kHz) is in ohms. Figure 7-46 shows the recommended Kelvin connections for the current-sense resistor. MAXIM NEW RELEASES DATA Book, 1994, P. 4-140, 4-143, 4-145.



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