Ordering Information

PT7771t

t

t

t

t = 1.3 to 3.5 Volts

Programming Information

VID4=1 VID4=0

VID3 VID2 VID1 VID0

Vout

Vout

1

1

1

1

2.0V

1.30V

1

1

1

0

2.1V

1.35V

1

1

0

1

2.2V

1.40V

1

1

0

0

2.3V

1.45V

1

0

1

1

2.4V

1.50V

1

0

1

0

2.5V

1.55V

1

0

0

1

2.6V

1.60V

1

0

0

0

2.7V

1.65V

0

1

1

1

2.8V

1.70V

0

1

1

0

2.9V

1.75V

0

1

0

1

3.0V

1.80V

0

1

0

0

3.1V

1.85V

0

0

1

1

3.2V

1.90V

0

0

1

0

3.3V

1.95V

0

0

0

1

3.4V

2.00V

0

0

0

0

3.5V

2.05V

Logic 0 = Pin 12 potential (remote sense gnd)

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

VID3 and VID4 may not be changed while the unit

is operating.

For dimensions and PC board layout,

see Package Style 1020 and 1030

1.3V to 3.5V@32A

4.5V to 5.5V

Sense

Features

Efficiency vs Output Current (@Vout=+3.3V)

Output Current (A)

Output Current (A)

Output Current (A)

Output Current (A)

Output Current (A)

Safe Operating Area (@Vin=+5V, Vout=+3.3V, Pkg N)

Output Current (A)

Output Current (A)

Output Current (A)

Output Current (A)

Output Current (A)

Airflow

Recommended Maximum

Operating Temperature

Note: SOA curves represent operating conditions at

which internal components are at or below manufacturer’s

maximum rated operating temperatures.

Power Dissipation vs Output Current (@Vout=+3.3V)

Output Current (A)

Output Current (A)

Output Current (A)

Output Current (A)

Output Current (A)

Output Ripple vs Output Current (@Vout=+3.3V)

Output Current (A)

Output Current (A)

Output Current (A)

Output Current (A)

Output Current (A)

Vin

Vin

Vin

3

CHARACTERISTIC DA T A

Series

PT7770

Case/Pin

Configuration

Vertical Through-Hole

N

Horizontal Through-Hole

A

Horizontal Surface Mount

C

60

70

80

90

100

0

4

8

12

16

20

24

28

32

4.5V

5.0V

5.5V

0

2

4

6

8

10

12

14

16

18

20

0

4

8

1216

2024

2832

4.5V

5.0V

5.5V

0

5

10

15

20

25

30

35

40

0

4

8

12

16

20

24

28

32

4.5V

5.0V

5.5V

20

30

40

50

60

70

80

90

0

4

8

12

16

20

24

28

32

Nat. Conv

60 LFM

120 LFM

200 LFM