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ADP1714 Arkusz danych(PDF) 6 Page - Analog Devices |
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ADP1714 Arkusz danych(HTML) 6 Page - Analog Devices |
6 / 8 page EVAL-ADP1712/ADP1713/ADP1714 Rev. 0 | Page 6 of 8 LOAD REGULATION For load regulation measurements, the regulator’s output is monitored while the load is varied. For good load regulation, the output must change as little as possible with varying load. The input voltage must be held constant during this measure- ment. The load current can be varied from 0 mA to 300 mA. Figure 9 shows the typical load regulation performance of an ADP1712 with fixed 3.3 V output for an input voltage of 3.8 V. 3.304 3.290 0.1 1000 ILOAD (mA) 1 10 100 3.302 3.300 3.298 3.296 3.294 3.292 Figure 9. Output Voltage vs. Load Current DROPOUT VOLTAGE Dropout voltage can be measured using the configuration shown in Figure 7. Dropout voltage is defined as the input-to- output voltage differential when the input voltage is set to the nominal output voltage. This applies only for output voltages above 2.5 V. Dropout voltage increases with larger loads. For more accurate measurements, a second voltage meter can be used to monitor the input voltage across the input capacitor. The input supply voltage may need to be adjusted to account for IR drops, especially if large load currents are used. Figure 10 shows a typical curve of dropout voltage measurements with different load currents. 180 0 0.1 1000 ILOAD (mA) 1 10 100 160 140 120 100 80 60 40 20 Figure 10. Dropout Voltage vs. Load Current |
Podobny numer części - ADP1714 |
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Podobny opis - ADP1714 |
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