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DEMO MANUAL DC2389A
performance summary
SYMBOL
PARAMETER
V
Input Voltage Range
IN
V
Output Voltage
OUT
I
Maximum Output Current
OUT
f
Switching Frequency
SW
EFF
Efficiency at DC
100
90
80
70
60
50
0
Figure 1. LTM8073 Demo Circuit
DC2389A Efficiency vs Load Current
0
–20
–40
–60
–80
–100
–120
0
Figure 3. DC2389A Output Noise Spectrum,
V
= 12V, V
IN
2
Specifications are at T
CONDITIONS
V
= 12V, I
IN
12V INPUT
24V INPUT
0.1
1
10
LOAD CURRENT (A)
DC2389 F01
FIXED FREQUENCY
SPREAD SPECTRUM MODE
2
4
6
8
10
FREQUENCY (MHz)
DC2389 F03
= 5V, I
= 3A
OUT
OUT
= 25°C
A
= 1A
OUT
70
60
50
40
30
20
10
0
0
10
20
Figure 2. LTM8073 Demo Circuit DC2389A
Case Temperature Rise vs Input Voltage
V
OUT
10mV/DIV
Figure 4. DC2389A Output Ripple,
V
= 12V, V
IN
OUT
MIN
TYP
MAX
7
60
4.85
5
5.15
3
1.2
93.9
I
= 2A
OUT
I
= 2.5A
OUT
I
= 3A
OUT
30
40
50
60
70
V
(V)
IN
DC2389 F02
DC2389 F04
500ns/DIV
= 5V, I
= 3A
OUT
UNITS
V
V
A
MHz
%
dc2389af
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