Data Sheet

ADP198

Rev. D | Page 13 of 16

ENABLE FEATURE

The ADP198 uses the EN pin to enable and disable the VOUT

pin under normal operating conditions. As shown in Figure 25,

threshold, VOUT turns off.

0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

0.45

0.50

0.55

0.60

0.65

0.70

0.75

0.80

ENABLE VOLTAGE (V)

Figure 25. Typical EN Operation

As shown in Figure 25, the EN pin has hysteresis built in. This

prevents on/off oscillations that can occur due to noise on the

EN pin as it passes through the threshold points.

therefore, these thresholds vary with the changing input voltage.

Figure 26 shows the typical EN active/inactive thresholds when

the input voltage varies from 1.65 V to 6.5 V.

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1

2

3

4

5

6

7

INPUT VOLTAGE (V)

EN RISE

EN FALL