Datasheet

ADP198 Data Sheet
Rev. G | Page 12 of 16
APPLICATIONS INFORMATION
GROUND CURRENT
The major source for ground current in the ADP198 is an internal
4 MΩ pull-down resistor on the enable pin. Figure 23 shows
the typical ground current when V
EN
= V
IN
and varies from
1.65 V to 6.5 V.
0
2
4
6
8
10
12
14
16
18
20
1.5 2.0
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5
GROUND CURRENT (µA)
V
IN
(V)
I
LOAD
= 1000mA
I
LOAD
= 100mA
I
LOAD
= 10mA
I
LOAD
= 200mA
I
LOAD
= 400mA
I
LOAD
= 800mA
09484-023
Figure 23. Ground Current vs. Load Current
As shown in Figure 24, an increase in quiescent current can occur
when V
EN
≠ V
IN
. This is caused by the CMOS logic nature of the
level shift circuitry as it translates a V
EN
signal ≥1.2 V to a logic
high. This increase is a function of the V
IN
− V
EN
delta.
0
10
20
30
40
50
60
0 1
2 3
4
5 6
GROUND CURRENT (µA)
ENABLE VOLTAGE (V)
09484-024
Figure 24. Typical Ground Current when V
EN
≠ V
IN