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AS3701 数据表(PDF) 13 Page - ams-OSRAM AG |
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AS3701 数据表(HTML) 13 Page - ams-OSRAM AG |
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13 / 110 page  Page 12 ams Datasheet Document Feedback [v1-11] 2016-Dec-14 AS3701 − Detailed Description – Power Management Functions Figure 11: Switching Behavior at Operating Point 4 Operating Point 4: These graphs show the switching behavior referring to the operating point 4 from figure10. Here the mode is set to low noise/low ripple operation and the DCDC is continuously switching at 10mA load current. Only in the case the load current gets so small, that less than the minimum on time of the PMOS would be needed to keep the loop in regulation, the regulator will enter low power mode operation. Figure 12: Switching Behavior at Operating Point 2 Operating Point 2: These graphs show the switching behavior referring to the operating point 2 from figure10. Here the mode is set to low noise/low ripple operation and the DCDC has already started to skip pulses, as the minimum PMOS ON time of 40ns has been reached and the load current is further decreasing down to 2mA. |
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