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ADP7183-EVALZ データシート(PDF) 5 Page - Analog Devices

部品番号 ADP7183-EVALZ
部品情報  Output voltage accuracy
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メーカー  AD [Analog Devices]
ホームページ  http://www.analog.com
Logo AD - Analog Devices

ADP7183-EVALZ データシート(HTML) 5 Page - Analog Devices

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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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