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N = Number of Track pins connected together

10 kΩ

V

Vo

R

SET1

C

O1

+

C

+

PTH12050W

5

6

3

4

2

Track

V

I

V

O

GND

Inhibit

1

Adjust

TL7712A

V

CC

GND

SENSE

RESIN

REF

CT

RESET

RESET

8

7

2

1

3

5

6

4

C

T

C

REF

R

RST

Vo

C

O2

+

C

+

PTH12060W

7

10

4

5

6

2

3

98

Track

V

I

V

O

GND

Inhibit

1

Up Dn

Sense

Adjust

SET2

U1

U2

U3

R

2.0 kΩ

11.5 kΩ

I2

0.1 µF

3.3 µF

50 Ω

I1

R

t − Time − 20 ms/div

t − Time − 400 µs/div

Margin Up/Down Controls

PTH12020W/L

SLTS208E–MAY 2003–REVISED OCTOBER 2005

Figure 16. Sequenced Power Up and Power Down Using Auto-Track

Figure 17. Simultaneous Power Up

Figure 18. Simultaneous Power

With Auto-Track Control

Down With Auto-Track Control

The PTH12060, PTH12010, PTH12020, and PTH12030 products incorporate Margin Up and Margin Down

nominal 5%. This provides a convenient method for dynamically testing the operation of the load circuit over its

supply margin or range. It can also be used to verify the function of supply voltage supervisors. The ±5% change

18