Application Notes

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PTH Series of Wide-Output Adjust

Power Modules (3.3/5-V Input)

Figure 3–6; Simultaneous Power Up with Auto-Track Control

PTH05010W

1

10

4

5

6

2

3

98

Track

V

IN

V

O

GND

Inhibit

PTH05020W

1

10

4

5

6

2

3

98

Track

V

IN

V

O

GND

Inhibit

7

C

OUT

C

OUT

C

IN

C

IN

Vo

2 =1.8 V

Vo

1 =3.3 V

U1

U2

+5 V

0 V

On/Off Control

1 = Power Down

0 = Power Up

Q1

BSS138

C1

0.1 µF

R1

100 k

R

2

698

R

3

5k49

7

Figure 3–5; Sequenced Power Up & Power Down Using Auto-Track

Figure 3–7; Simultaneous Power Down with Auto-Track Control

Vo1 (1 V/Div)

Vo2 (1 V/Div)

On/Off Input

(5 V/Div)

HORIZ SCALE: 10 ms/Div

Vo1 (1 V/Div)

Vo2 (1 V/Div)

On/Off Input

(5 V/Div)

HORIZ SCALE: 10 ms/Div