TYPICAL

CHARACTERISTICS

For technical support and more information, see inside back cover or visit www.ti.com/powertrends

PT7778—3.3V

32 Amp Programmable Integrated

Switching Regulator

Ordering Information

PT7778t

t

t

t

t = 1.3 to 3.5 Volts

Programming Information

VID3 VID2 VID1 VID0

Vout

1

1

1

1

1.30V

1

1

1

0

1.35V

1

1

0

1

1.40V

1

1

0

0

1.45V

1

0

1

1

1.50V

1

0

1

0

1.55V

1

0

0

1

1.60V

1

0

0

0

1.65V

0

1

1

1

1.70V

0

1

1

0

1.75V

0

1

0

1

1.80V

0

1

0

0

1.85V

0

0

1

1

1.90V

0

0

1

0

1.95V

0

0

0

1

2.00V

0

0

0

0

2.05V

Logic 0 = Pin 12 potential (remote sense gnd)

Logic 1 = Open circuit (no pull-up resistors)

VID3 may not be changed while the unit is operating.

For dimensions and PC board layout, see

Package Style 1020 and 1030

(64A with PT7740 Booster)

1.3V to 2.05V

Features

Case/Pin

Configuration

Vertical Through-Hole

N

Horizontal Through-Hole

A

Horizontal Surface Mount

C

Power Dissipation Vs Output Current

Efficiency Vs Output Current

Output Ripple Vs Output Current

50.0

55.0

60.0

65.0

70.0

75.0

80.0

85.0

90.0

0

4

8

12

16

20

24

28

32

Iout (A)

1.8V

1.5V

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

0

4

8

12

16

20

24

28

32

Iout (A)

1.5V

1.8V

0.00

2.00

4.00

6.00

8.00

10.00

12.00

14.00

16.00

0

4

8

12

162024

2832

Iout (A)

1.8V

1.5V

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

0.0

4.0

8.0

12.0

16.0

20.0

24.0

28.0

32.0

Iout (A)

400LFM

200LFM

120LFM

Nat conv

Airflow

Note A:

Characteristic data has been developed from actual products tested at 25°C. This data is considered typical for the regulator.

Note B:

Safe Operating Area curves represent conditions at which internal components are at or beow manufacturer’s rated operating temperatures.