PT7778-3.3V Datasheet, PDF (2/4 Pages) Texas Instruments – Switching Regulator

PT7778—3.3V
32 Amp Programmable Integrated
Switching Regulator
Features
• +3.3V Input
• 32A Output
(64A with PT7740 Booster)
• 4-bit Programmable:
1.3V to 2.05V
• High Efficiency
• Short Circuit Protection
• Differential Remote Sense
• 27-pin SIP Package
Programming Information
VID3 VID2 VID1 VID0 Vout
1
1
1
1
1
1
1
0
1
1
0
1
1
1
0
0
1
0
1
1
1.30V
1.35V
1.40V
1.45V
1.50V
1
0
1
0
1
0
0
1
1
0
0
0
0
1
1
1
0
1
1
0
0
1
0
1
1.55V
1.60V
1.65V
1.70V
1.75V
1.80V
0
1
0
0
0
0
1
1
0
0
1
0
0
0
0
1
0
0
0
0
1.85V
1.90V
1.95V
2.00V
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.
Ordering Information
PT7778t = 1.3 to 3.5 Volts
For dimensions and PC board layout, see
Package Style 1020 and 1030
PT Series Suffix (PT1234X)
Case/Pin
Configuration
Vertical Through-Hole
N
Horizontal Through-Hole
A
Horizontal Surface Mount
C
TYPICAL CHARACTERISTICS
Performance Characteristics, V_in =3.3V (See Note A)
Efficiency Vs Output Current
90.0
85.0
80.0
75.0
70.0
65.0
60.0
55.0
VOUT
1.8V
1.5V
50.0
0
4
8
12
16
20
24
28
32
Iout (A)
Safe Operating Area Curves (See Note B)
PT7778, V_IN =3.3V, V_O =1.8V
90.0
80.0
70.0
Airflow
400LFM
60.0
200LFM
50.0
120LFM
Nat conv
40.0
30.0
20.0
0.0 4.0 8.0 12.0 16.0 20.0 24.0 28.0 32.0
Iout (A)
Output Ripple Vs Output Current
80.0
70.0
60.0
50.0
VOUT
40.0
1.5V
1.8V
30.0
20.0
10.0
0.0
0
4
8
12
16
20
24
28
32
Iout (A)
Power Dissipation Vs Output Current
16.00
14.00
12.00
10.00
8.00
6.00
VOUT
1.8V
1.5V
4.00
2.00
0.00
0
4
8
12
16
20
24
28
32
Iout (A)
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.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends