Analog Devices Linear ADI Power LTM4681 Manual page 15

TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current vs Load Current
Comparison, R = 2mΩ,
SENSE
12V to 1.0V , 250kHz
OUT
7
6
5
4
3
2
1
0
0 10 20 40
30
LOAD CURRENT (A)
READ_IOUT of 12 LTM4681 Channels
12V , 1V , T = –40°C, I
IN OUT J
System Having Reached Thermally
Steady-State Condition, No Airflow
31.8
31.6
31.4
31.2
31.0
30.8
30.6
30.4
30.2
30.0
29.8
29.6
0 1 2 3 4 5 6 7 8 9 10 11 12
CHANNEL NUMBER
Supply Current vs Load Current
Comparison, R
12V to 1.8V
12
10
8
6
4
2
R
SENSE
READBACK
0
60 70 0
50
4681 G14
READ_IOUT of 12 LTM4681 Channels
= 30A,
12V
OUTn
System Having Reached Thermally
Steady-State Condition, No Airflow
31.0
30.8
30.6
30.4
30.2
30.0
29.8
29.6
29.4
29.2
29.0
0 1 2 3 4 5 6 7 8 9 10 11 12
4681 G17
For more information
T = 25°C, 12V
A
= 2mΩ,
SENSE
, 500kHz
OUT
R
SENSE
READBACK
10 20 30 40 50 60 70
LOAD CURRENT (A)
4681 G15
, 1V , T = 25°C, I = 30A,
IN OUT J OUTn
CHANNEL NUMBER
4681 G18
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LTM4681
to 1V , unless otherwise noted.
IN OUT
Supply Current vs Load Current
Comparison, R = 2mΩ,
SENSE
12V to 3.3V , 650kHz
OUT
20
18
16
14
12
10
8
6
4
2
0
0 10 20 30 40 50
LOAD CURRENT (A)
READ_IOUT of 12 LTM4681 Channels
12V , 1V , T = 125°C, I
IN OUT J OUTn
System Having Reached Thermally
Steady-State Condition, No Airflow
30.8
30.6
30.4
30.2
30.0
29.8
29.6
29.4
29.2
29.0
28.8
0 1 2 3 4 5 6 7 8 9 10 11 12
CHANNEL NUMBER
R
SENSE
READBACK
60 70
4681 G16
= 30A,
4681 G19
Rev. A
15