PT7705 Datasheet, PDF (2/4 Pages) Texas Instruments – 18 AMP “BIG-HAMMER” PROGRAMMABLE INTEGRATED SWITCHING REGULATOR

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PT7705 Series
Features
• Single-Device: +5V input
• 5-bit Programmable:
1.3V to 3.5V@18A
• High Efficiency
• Input Voltage Range:
4.5V to 5.5V
• Differential Remote Sense
• 27-pin SIP Package
• Parallelable with PT7749
18A “Current Boosters”
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
VID4=1
Vout
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
VID4=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
Ordering Information
PT7705t = 1.3 to 3.5 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
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.
CHARACTERISTIC DATA
PT7705, Vo = 3.3 VDC (See Note 1)
Safe Operating Area Curves (@Vin=+5V)
PKG SUFFIX N
90
80
70
Recommended Maximum
60
Operating Temperature
50
40
30
20
0
2
4
6
8 10 12 14 16 18
Output Current (Amps)
PKG SUFFIX A, C
90
80
70
Recommended Maximum
60
Operating Temperature
50
40
30
20
0
2
4
6
8 10 12 14 16 18
Output Current (Amps)
Airflow
Nat Conv
60LFM
100LFM
200LFM
Airflow
Nat Conv
60LFM
100LFM
200LFM
PT7705, Vo = 3.3 VDC (See Note 1)
Efficiency vs Output Current
100
90
80
Vin
70
4.5V
5.0V
60
5.5V
50
40
0
3
6
9
12
15
18
Iout-(Amps)
Ripple vs Output Current
60
50
40
Vin
5.5V
30
5.0V
4.5V
20
10
0
0
3
6
9
12
15
18
Iout-(Amps)
Power Dissipation vs Output Current
14
12
10
Vin
5.5V
8
5.0V
6
4.5V
4
2
0
0
3
6
9
12
15
18
Iout-(Amps)
Note 1: All data listed in the above graphs has been developed from actual products tested at 25°C. This data is considered typical data for the ISR.
Note 2: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures.
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