PT7708-3.3V Datasheet, PDF (2/4 Pages) Texas Instruments – Integrated Switching Regulator

PT7708—3.3V
20 Amp Programmable
Next Generation “Big Hammer”
Features
• Single-Device: +3.3V input
• 4-bit Programmable:
1.3V to 2.05V@20A
• High Efficiency
• Differential Remote Sense
• Short-Circuit Protection
• Parallelable with PT7742
20A “Current Booster”
Programming Information
VID3
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
VID2
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
VID1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
VID0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Vout
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 may not be changed while the unit is operating.
Ordering Information
PT7708❏ = 1.3 to 2.05 Volts
(For dimensions and PC board layout,
see Package Styles 800 and 810.)
PT Series Suffix (PT1234X)
Case/Pin
Configuration
Vertical Through-Hole N
Horizontal Through-Hole A
Horizontal Surface Mount C
TYPICAL CHARACTERISTICS
Characteristic Data, V_in =3.3V (See Note A)
Efficiency vs Output Current
90
80
VOUT
1.8
70
1.5
60
50
0
4
8
12
16
20
Iout (A)
Ripple vs Output Current
40
Safe Operating Area (See Note B)
PT7708, V_IN =3.3V, Vo =1.8V
90.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
0.0
4.0
8.0
12.0
16.0
Iout (A)
Airflow
200LFM
120LFM
60LFM
Nat conv
20.0
30
VOUT
1.5
20
1.8
10
0
0
4
8
12
16
Iout (A)
Power Dissipation vs Output Current
12
10
8
6
4
2
0
0
4
8
12
16
Iout (A)
20
VOUT
1.5
1.8
20
Note A: All data in the above graphs has been developed from actual products tested at 25°C. The data is considered typical for the ISR
Note B: SOA 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