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ADP7183-EVALZ データシート(PDF) 5 Page - Analog Devices |
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ADP7183-EVALZ データシート(HTML) 5 Page - Analog Devices |
5 / 9 page ADP7183-EVALZ User Guide UG-795 Rev. 0 | Page 5 of 9 LINE REGULATION MEASUREMENTS For line regulation measurements, the output of the regulator is monitored while its input is varied. For good line regulation, the output must change as little as possible with varying input levels. To ensure that the device is not in dropout mode during line regulation measurement, VIN must be varied between VOUT − 0.5 V (or −2 V, whichever is greater) and −5.5 V. For example, for an ADP7183 with a fixed −3.3 V output, VIN must vary between −3.8 V and −5.5 V. Note that this measurement can be repeated under different load conditions. Figure 5 shows the typical line regulation performance of an ADP7183 with a fixed −3.3 V output. VIN (V) NO LOAD ILOAD = –10mA ILOAD = –100mA ILOAD = –300mA –3.38 –3.36 –3.34 –3.32 –3.30 –3.28 –3.26 –5.5 –5.3 –5.1 –4.9 –4.7 –4.5 –4.3 –4.1 –3.9 Figure 5. Output Voltage (VOUT) vs. Input Voltage (VIN) at VOUT = −3.3 V, TA = 25°C LOAD REGULATION MEASUREMENTS For load regulation measurements, while the load varies, monitor the output of the regulator. For good load regulation, the output must change as little as possible with varying loads. Hold the input voltage constant during load regulation measurement. The load current can be varied from 0 mA to −300 mA. Figure 6 shows the typical load regulation performance of an ADP7183 with a fixed −3.3 V output for an input voltage of −3.8 V. ILOAD (mA) –1000 –100 –10 –3.369 –3.349 –3.329 –3.309 –3.289 –3.269 –3.249 Figure 6. Output Voltage (VOUT) vs. Load Current (IOUT) at VIN = −3.8 V, VOUT = −3.3 V, TA = 25°C |
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同様の説明 - ADP7183-EVALZ |
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