Analog Devices ADP1711 Evaluation Board ADP1711-2.5-EVALZ ADP1711-2.5-EVALZ Hoja De Datos
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ADP1711-2.5-EVALZ
EVAL-ADP1710/ADP1711
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
levels. The input voltage must be held constant during this
measurement. The load current can be varied from 0 mA to
150 mA. Figure 7 shows the typical load regulation performance
of an ADP1710 with 3.3 V output for an input voltage of 3.8 V.
monitored while the load is varied. For good load regulation,
the output must change as little as possible with varying load
levels. The input voltage must be held constant during this
measurement. The load current can be varied from 0 mA to
150 mA. Figure 7 shows the typical load regulation performance
of an ADP1710 with 3.3 V output for an input voltage of 3.8 V.
3.32
3.26
0.1
1000
I
LOAD
(mA)
V
OU
T
(V
)
1
10
100
3.31
3.30
3.29
3.28
3.27
06
31
1-
00
8
Figure 7. ADP1710 Load Regulation
DROPOUT VOLTAGE
Dropout voltage measurements can also be performed using
the configuration shown in Figure 5. 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 8 shows a typical curve of dropout voltage measurements
with different load currents.
the configuration shown in Figure 5. 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 8 shows a typical curve of dropout voltage measurements
with different load currents.
180
0
0.1
1000
I
LOAD
(mA)
V
D
R
OP
OU
T
(m
V)
1
10
100
160
140
120
100
80
60
40
20
06
31
1-
00
9
Figure 8. Dropout Voltage vs. Load Current