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