ADM663A/ADM666A

REV. 0

–7–

+85

°C. The resistor value is calculated as R = 4/0.1 = 40 Ω. A

resistor power rating of 400 mW or greater may be used.

Bypass Capacitors

The high frequency performance of the ADM663A/ADM666A

may be improved by decoupling the ouput using a filter capaci-

tor. A capacitor of 0.1

µF is suitable.

Typical Performance Characteristics

0.01

0.1

10000

1000

100

10

1

80

40

0

20

60

FREQUENCY – Hz

V

V

V

T

Figure 10. Power Supply Rejection Ratio vs. Frequency

2.0

0

20

0.6

0.2

2

0.4

0

1.2

0.8

1.0

1.4

1.6

1.8

18

16

14

12

10

8

6

4

V

T

V

V

Output Current

12

0

16

6

2

4

4

2

10

8

14

10

8

612

Figure 12. Quiescent Current vs. Input Voltage

50

10

0

1.0

0

0.3

0.1

0.2

0.6

0.4

0.5

0.7

0.8

0.9

40

30

20

I

V

T

V

V

Output Current

An input capacitor helps reduce noise, improves dynamic per-

formance and reduces the input dV/dt at the regulator input. A

suitable input capacitor is 0.1

µF or greater.