PT7777 Datasheet, PDF (2/3 Pages) Texas Instruments – 32 AMP HIGH-PERFORMANCE SLEDGE HAMMER” PROGRAMMABLE ISR

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PT7777 Series
Features
• +5V input
• 5-bit Programmable:
1.3V to 3.5V@32A
• High Efficiency
• Input Voltage Range:
4.5V to 5.5V
• Differential Remote
Sense
• 27-pin SIP Package
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
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
Ordering Information
PT7777t = 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
Efficiency vs Output Current (@Vout=+3.3V)
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 (@Vout=+3.3V)
20
18
16
14
12
10
8
6
4
2
0
0 4 8 12 16 20 24 28 32
Vin
4.5V
5.0V
5.5V
Output Current (A)
Safe Operating Area (@Vin=+5V, Vout=+3.3V, Pkg N)
90
80
70 _{Recommended Maximum}
Operating Temperature
60
50
Airflow
Nat. Conv
60 LFM
120 LFM
200 LFM
40
30
20
0
4
8
12
16
20
24
28
32
Output Current (A)
Note: SOA curves represent operating conditions at
which internal components are at or below manufacturer’s
maximum rated operating temperatures.
Output Ripple vs Output Current (@Vout=+3.3V)
40
35
30
Vin
25
4.5V
20
5.0V
15
5.5V
10
5
0
0 4 8 12 16 20 24 28 32
Output Current (A)
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 [phone] Fax: [phone] http://www.powertrends.com