Typical Performance Characteristics - Analog Devices EVAL-LT7184S-AZ User Manual

Evaluation Board User Guide

Typical Performance Characteristics

V OUT0 = 1.2V
100
90
80
70 EFFICIENCY
60
50
40
30
20
POWER LOSS
10
0
0 1 2 3
60
50
40
30
20
10
0
–10
–20
0.1 1
EVAL-LT7184S-AZ EVALUATION BOARD
(WITH EMI FILTER INSTALLED)
14V INPUT TO 1.2V AND 3.3V OUTPUT AT NO LOAD,
analog.com
f
= 1MHz
SW
FLOAT EXTV
V = 8V
IN
V = 12V
IN
V = 16V
IN
4 5 6 7 8
LOAD CURRENT (A)
Figure 4. Efficiency vs. Load Current at 1MHz Switching Frequency
CLASS 5 PEAK LIMIT
SLOW SW SLEW RATE
FAST SW SLEW RATE
10 100
FREQUENCY (MHz)
f
SW
Figure 5. EVAL-LT7184S-AZ Radiated EMI Performance
V OUT1 = 3.3V
3.0 100
2.7
90
2.4 80
EFFICIENCY
2.1 70
1.8 60
1.5 50
1.2 40
0.9
30
CC
0.6 20
0.3
10
0 0
9 0 1
*MAX LOAD AT P
ABS MAX AVERAGE P
60
50
40
30
20
10
0
–10
–20
1k 0.1
= 1MHz 14V INPUT TO 1.2V AT 9A AND 3.3V AT 9A OUTPUT,
EVAL-LT7184S-AZ
FLOAT EXTV
POWER LOSS
2 3 4 5 6 7
LOAD CURRENT (A)
= 8V LIMITED TO 6.5A SO AS NOT TO EXCEED
VIN
INPUT SUPPLY CURRENT RATING.
VIN
CLASS 5 PEAK LIMIT
SLOW SW SLEW RATE
FAST SW SLEW RATE
1 10 100
FREQUENCY (MHz)
EVAL-LT7184S-AZ EVALUATION BOARD
(WITH EMI FILTER INSTALLED)
4.0
3.6
3.2
2.8
2.4
2.0
1.6
f 1.2
= 1MHz
SW
CC 0.8
V = 8V
IN
0.4
V = 12V
IN
V = 16V
IN
0
8 9
1k
f
= 1MHz
SW
Rev 0 4 of 14