LTM4600
TYPICAL PERFORMANCE CHARACTERISTICS
(See Figure 18 for all curves)
100
90
80
70
60
Ef?ciency vs Load Current
with 5V IN (FCB = 0)
100
90
80
70
60
Ef?ciency vs Load Current
with 12V IN (FCB = 0)
100
90
80
70
60
Ef?ciency vs Load Current
with 18V IN (FCB = 0)
50
40
30
0
2
4
6
0.6V OUT
1.2V OUT
1.5V OUT
2.5V OUT
8
10
50
40
30
0
2
4
6
0.6V OUT
1.2V OUT
1.5V OUT
2.5V OUT
3.3V OUT
8
10
50
40
30
0
2
4
6
1.5V OUT
1.8V OUT
2.5V OUT
3.3V OUT
8
10
90
LOAD CURRENT (A)
Ef?ciency vs Load Current
with Different FCB Settings
4600 G01
LOAD CURRENT (A)
1.2V Transient Response
4600 G02
LOAD CURRENT (A)
1.5V Transient Response
4600 G03
80
70
60
FCB > 0.7V
V OUT = 50mV/DIV
50
40
FCB = GND
I OUT = 5A/DIV
30
20
0.1
1
LOAD CURRENT (A)
V IN = 12V
V OUT = 1.5V
10
25μs/DIV
1.2V AT 5A/μs LOAD STEP
C OUT = 3 ? 22μF 6.3V CERAMICS
470μF 4V SANYO POSCAP
C3 = 100pF
4600 G05
25μs/DIV
1.5V AT 5A/μs LOAD STEP
C OUT = 3 ? 22μF 6.3V CERAMICS
470μF 4V SANYO POSCAP
C3 = 100pF
4600 G06
4600 G04
1.8V Transient Response
2.5V Transient Response
3.3V Transient Response
25μs/DIV
4600 G07
25μs/DIV
4600 G08
25μs/DIV
4600 G09
1.8V AT 5A/μs LOAD STEP
C OUT = 3 ? 22μF 6.3V CERAMICS
470μF 4V SANYO POSCAP
C3 = 100pF
2.5V AT 5A/μs LOAD STEP
C OUT = 3 ? 22μF 6.3V CERAMICS
470μF 4V SANYO POSCAP
C3 = 100pF
3.3V AT 5A/μs LOAD STEP
C OUT = 3 ? 22μF 6.3V CERAMICS
470μF 4V SANYO POSCAP
C3 = 100pF
4600fc
4
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