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Soft-Start Power Up

12 V

GND

GND

3.3 V

PTH12020W

7

10

4

5

6

2

3

9

Track

V

I

V

O

GND

Inhibit

1

Up Dn

Adjust

8

Sense

R

2k

0.1 W, 1%

SET

W

C

330 F

O

m

C

1000 F

I

m

PTH12060W/L

SLTS217D–MAY 2003–REVISED OCTOBER 2005

Table 5. Operating Features by Series and Input Bus Voltage

Series

Input Bus

Adjust

On/Off

Over-

Prebias

Auto-

Margin

Output

Thermal

(Trim)

Inhibit

Current

Startup

Track™

Up/Down

Sense

Shutdown

3.3V

6A

•

••••

PTHxx050

5 V

6 A

•

••••

12 V

6 A

•

••••

3.3V/5V

10A

•

••••

•

•

PTHxx060

12 V

8 A

•

••••

•

•

3.3V/5V

15A

•

••••

•

•

PTHxx010

12 V

12 A

•

••••

•

•

5V

8A

•

••••

•

PTVxx010

12 V

8 A

•

••••

•

3.3V/5V

22A

•

••••

•

•

•

PTHxx020

12 V

18 A

•

••••

•

•

•

5V

18 A

•

••••

•

•

PTVxx020

12 V

16 A

•

••••

•

•

3.3V/5V

30A

•

••••

•

•

•

PTHxx030

12 V

26 A

•

••••

•

•

•

For simple point-of-use applications, the PTH12050 (6 A) provides operating features such as an on/off inhibit,

output voltage trim, prebias start-up and overcurrent protection. The PTH12060 (10 A), and PTH12010 (12 A)

include an output voltage sense, and margin up/down controls. Then the higher output current, PTH12020 (18 A)

and PTH12030 (26 A) products incorporate overtemperature shutdown protection.

The PTV12010 and PTV12020 are similar parts offered in a vertical, single in-line pin (SIP) profile, at slightly

lower current ratings.

the task of sequencing the supply voltages in a power system. This and other features are described in the

following sections.

The Auto-Track feature allows the power-up of multiple PTH modules to be directly controlled from the Track pin.

However in a stand-alone configuration, or when the Auto-Track feature is not being used, the Track pin should

Figure 10. Power-Up Application Circuit

When the Track pin is connected to the input voltage, the Auto-Track function is permanently disengaged. This

allows the module to power up entirely under the control of its internal soft-start circuitry. When power up is

under soft-start control, the output voltage rises to the set-point at a quicker and more linear rate.

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