SLTS054A Datasheet, PDF (2/4 Pages) Texas Instruments – The PT7771 is a high-output Integrated grated Switching Regulator (ISR)

PT7771—5V
32 Amp “Sledge Hammer”
Programmable ISR
Features
• +5V input
• 5-bit Programmable:
1.3V to 3.5V@32A
• High Efficiency
• Differential Remote Sense
• Parallelable with PT7746
32A “Current Booster”
• 27-pin SIP Package
Programming Information
VID3 VID2 VID1 VID0
VID4=1 VID4=0
Vout Vout
1
1
1
1
1
1
1
0
1
1
0
1
1
1
0
0
1
0
1
1
1
0
1
0
1
0
0
1
1
0
0
0
0
1
1
1
0
1
1
0
0
1
0
1
0
1
0
0
0
0
1
1
0
0
1
0
0
0
0
1
0
0
0
0
2.0V
2.1V
2.2V
2.3V
2.4V
2.5V
2.6V
2.7V
2.8V
2.9V
3.0V
3.1V
3.2V
3.3V
3.4V
3.5V
1.30V
1.35V
1.40V
1.45V
1.50V
1.55V
1.60V
1.65V
1.70V
1.75V
1.80V
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 and VID4 may not be changed while the unit
is operating.
Ordering Information
PT7771❏ = 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
PT7771 @V_in =+5V, V_out =3.3V (See Note A)
Efficiency vs Output Current
100
90
Vin
4.5V
80
5.0V
5.5V
70
60
0 4 8 12 16 20 24 28 32
Output Current (A)
Power Dissipation vs Output Current
20
18
16
14
12
10
8
6
4
2
0
0 4 8 12 16 20 24 28 32
Output Current (A)
Vin
4.5V
5.0V
5.5V
Safe Operating Area Curves (See Note B)
PT7771 @V =+5V, V =3.3V, Pkg N
in
out
90
80
70
Airflow
60
Nat. Conv
60 LFM
120 LFM
50
200 LFM
40
30
20
0
4
8
12
16
20
24
28
32
Output Current (A)
Output Ripple vs Output Current
40
35
30
25
20
15
10
5
0
0 4 8 12 16 20 24 28 32
Output Current (A)
Vin
4.5V
5.0V
5.5V
Note A: All characteristic data in the above graphs has been developed from actual procducts tested at 25°C. This data is considered typical for the ISR.
Note B: OA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends