LTM4602 查看數據表（PDF） - Linear Technology
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LTM4602 Datasheet PDF : 24 Pages
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LTM4602
TYPICAL PERFORMANCE CHARACTERISTICS (See Figure 21 for all curves)
Efficiency vs Load Current
with 5VIN (FCB = 0)
100
90
80
70
60
50
40
30
0
0.8VOUT
1.2VOUT
1.5VOUT
1.8VOUT
2.5VOUT
3.3VOUT*
*FOR 5V TO 3.3V CONVERSION,
SEE FREQUENCY ADJUSTMENT
IN APPLICATIONS INFORMATION
2
4
6
8
LOAD CURRENT (A)
4602 G01
Efficiency vs Load Current
with 12VIN (FCB = 0)
100
90
80
70
60
50
40
30
0
0.8VOUT
1.2VOUT
1.5VOUT
1.8VOUT
2.5VOUT
3.3VOUT
3.3VOUT (950kHz)*
*950kHz INSTEAD OF 1.3MHz
INCREASES 3.3V EFFICIENCY 2%
2
4
6
8
LOAD CURRENT (A)
4602 G02
Efficiency vs Load Current
with 20VIN (FCB = 0)
100
90
80
70
60
50
1.2VOUT
1.5VOUT
1.8VOUT
40
2.5VOUT
3.3VOUT
30
0
2
4
6
8
LOAD CURRENT (A)
4602 G03
Light Load Efficiency vs
Load Current with 12VIN
(FCB > 0.7V, <5V)
100
1.2V Transient Response
1.5V Transient Response
90
80
70
60
50
1.2VOUT
1.5VOUT
40
1.8VOUT
2.5VOUT
3.3VOUT
30
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
LOAD CURRENT (A)
4602 G04
VOUT
50mV/DIV
IOUT
2A/DIV
20μs/DIV
1.2V AT 3A/μs LOAD STEP
COUT = 1 × 22μF, 6.3V CERAMICS
330μF, 4V SANYO POSCAP
4602 G05
VOUT
50mV/DIV
IOUT
2A/DIV
20μs/DIV
1.5V AT 3A/μs LOAD STEP
COUT = 1 × 22μF, 6.3V CERAMICS
330μF, 4V SANYO POSCAP
4602 G06
1.8V Transient Response
2.5V Transient Response
3.3V Transient Response
VOUT
50mV/DIV
VOUT
50mV/DIV
VOUT
50mV/DIV
IOUT
2A/DIV
20μs/DIV
1.8V AT 3A/μs LOAD STEP
COUT = 1 × 22μF, 6.3V CERAMICS
330μF, 4V SANYO POSCAP
4602 G07
IOUT
2A/DIV
20μs/DIV
2.5V AT 3A/μs LOAD STEP
COUT = 1 × 22μF, 6.3V CERAMICS
330μF, 4V SANYO POSCAP
4602 G08
IOUT
2A/DIV
20μs/DIV
3.3V AT 3A/μs LOAD STEP
COUT = 1 × 22μF, 6.3V CERAMICS
330μF, 4V SANYO POSCAP
4602 G09
4602fa
4
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