Datasheet

LTM4602
4
4602fa
Effi ciency vs Load Current
w
ith 5V
IN
(FCB = 0)
Effi ciency vs Load Current
with 12V
IN
(
FCB = 0
)
Effi ciency vs Load Current
with 20V
IN
(FCB = 0)
1.2V Transient Response 1.5V Transient Response
1.8V Transient Res
p
onse 2.5V Transient Res
p
onse 3.3V Transient Res
p
onse
(See Figure 21 for all curves)
V
OUT
50mV/DIV
1.2V AT 3A/μs LOAD STEP
C
OUT
= 1 × 22μF, 6.3V CERAMICS
330μF, 4V SANYO POSCAP
I
OUT
2A/DIV
20μs/DIV
4602 G05
1.5V AT 3A/μs LOAD STEP
C
OUT
= 1 × 22μF, 6.3V CERAMICS
330μF, 4V SANYO POSCAP
20μs/DIV
4602 G06
V
OUT
50mV/DIV
I
OUT
2A/DIV
1.8V AT 3A/μs LOAD STEP
C
OUT
= 1 × 22μF, 6.3V CERAMICS
330μF, 4V SANYO POSCAP
20μs/DIV
4602 G07
V
OUT
50mV/DIV
I
OUT
2A/DIV
2.5V AT 3A/μs LOAD STEP
C
OUT
= 1 × 22μF, 6.3V CERAMICS
330μF, 4V SANYO POSCAP
20μs/DIV
4602 G08
V
OUT
50mV/DIV
I
OUT
2A/DIV
3.3V AT 3A/μs LOAD STEP
C
OUT
= 1 × 22μF, 6.3V CERAMICS
330μF, 4V SANYO POSCAP
20μs/DIV
4602 G09
V
OUT
50mV/DIV
I
OUT
2A/DIV
LOAD CURRENT (A)
0
EFFICIENCY (%)
30
40
50
100
70
2
4
4602 G01
80
90
60
6
8
0.8V
OUT
1.2V
OUT
1.5V
OUT
1.8V
OUT
2.5V
OUT
3.3V
OUT
*
*FOR 5V TO 3.3V CONVERSION,
SEE FREQUENCY ADJUSTMENT
IN APPLICATIONS INFORMATION
LOAD CURRENT (A)
0
30
EFFICIENCY (%)
40
50
100
70
2
4
4602 G02
80
90
60
6
8
0.8V
OUT
1.2V
OUT
1.5V
OUT
1.8V
OUT
2.5V
OUT
3.3V
OUT
3.3V
OUT
(950kHz)*
*950kHz INSTEAD OF 1.3MHz
INCREASES 3.3V EFFICIENCY 2%
LOAD CURRENT (A)
0
EFFICIENCY (%)
50
60
70
8
4602 G03
40
30
2
4
6
100
90
80
1.2V
OUT
1.5V
OUT
1.8V
OUT
2.5V
OUT
3.3V
OUT
Li
g
ht
L
oa
d
Effi
c
i
ency vs
Load Current with 12V
IN
(FCB > 0.7V, <5V)
LOAD CURRENT (A)
0
EFFICIENCY (%)
60
80
100
0.8
4602 G04
40
50
70
90
30
0.20.1
0.40.3
0.6 0.7 0.9
0.5
1
1.2V
OUT
1.5V
OUT
1.8V
OUT
2.5V
OUT
3.3V
OUT
TYPICAL PERFORMANCE CHARACTERISTICS