Linear DC1543A, Demo Manual, Page: 4 / 8

4
dc1543afa
DEMO MANUAL DC1543A
OUTPUT CURRENT (A)
0
40
60
EFFICIENCY (%)
90
85
80
75
70
65
50
55
45
95
1 6 7 8 9 10 2 3 4 5
1.8V
OUT
, 325kHz
2.5V
OUT
, 335kHz
3.3V
OUT
, 360kHz
0.9V
OUT
, 235kHz
1.0V
OUT
, 255kHz
1.2V
OUT
, 285kHz
1.5V
OUT
, 315kHz
40
60
90
85
80
75
70
65
50
55
45
95
OUTPUT CURRENT (A)
0
EFFICIENCY (%)
1 6 7 8 9 10 2 3 4 5
1.8V
OUT
, 325kHz
2.5V
OUT
, 335kHz
3.3V
OUT
, 360kHz
5.0V
OUT
, 550kHz
6.0V
OUT
, 660kHz
0.9V
OUT
, 235kHz
1.0V
OUT
, 255kHz
1.2V
OUT
, 285kHz
1.5V
OUT
, 315kHz
OUTPUT CURRENT (A)
0
EFFICIENCY (%)
1 6 7 8 9 10 2 3 4 5
40
60
90
85
80
75
70
65
50
55
45
95
1.8V
OUT
, 325kHz
2.5V
OUT
, 335kHz
3.3V
OUT
, 360kHz
5.0V
OUT
, 550kHz
6.0V
OUT
, 660kHz
0.9V
OUT
, 235kHz
1.0V
OUT
, 255kHz
1.2V
OUT
, 285kHz
1.5V
OUT
, 315kHz
OUTPUT CURRENT (A)
0
EFFICIENCY (%)
1 6 7 8 9 10 2 3 4 5
1.8V
OUT
, 325kHz
2.5V
OUT
, 335kHz
3.3V
OUT
, 360kHz
5.0V
OUT
, 550kHz
6.0V
OUT
, 660kHz
0.9V
OUT
, 235kHz
1.0V
OUT
, 255kHz
1.2V
OUT
, 285kHz
1.5V
OUT
, 315kHz
40
60
90
85
80
75
70
65
50
55
45
95
Efficiency vs Load Current at 6V
IN
Efficiency vs Load Current at 12V
IN
2a. V
IN
= 6V
2b. V
IN
= 12V
2c. V
IN
= 24V
2d. V
IN
= 36V
Efficiency vs Load Current at 24V
IN
Efficiency vs Load Current at 36V
IN
Figure 2. Measured DC1543A Efficiency at Different V
IN
, V
OUT
and f
SW
(CCM Mode Enabled)
Please refer to Table 1 in LTM4641 data sheet for the switching frequency at each output voltage.
QUICK START PROCEDURE
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