Linear Technology EN55022B, Руководство пользователя

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LTM4612
5
4612fc
For more information www.linear.com/LTM4612
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Load Current with
3.3V
OUT
(FCB = 0)
Efficiency vs Load Current with
5V
OUT
(FCB = 0)
Efficiency vs Load Current with
12V
OUT
(FCB = 0)
Efficiency vs Load Current with
15V
OUT
(FCB = 0, Refer to Figure 20)
Transient Response from 12V
IN
to 3.3V
OUT
Transient Response from 12V
IN
to 5V
OUT
Transient Response from 24V
IN
to 12V
OUT
Start-Up with 24V
IN
to 12V
OUT
at I
OUT
= 0A
Start-Up with 24V
IN
to 12V
OUT
at
I
OUT
= 5A
(Refer to Figure 18)
LOAD CURRENT (A)
0
EFFICIENCY (%)
70
95
100
1 2 3
60
85
65
90
55
50
80
75
4 5
4612 G01
5V
IN
3.3V
OUT
12V
IN
3.3V
OUT
24V
IN
3.3V
OUT
36V
IN
3.3V
OUT
LOAD CURRENT (A)
0
EFFICIENCY (%)
70
95
1 2 3
60
85
65
90
55
50
80
75
4 5
4612 G02
12V
IN
5V
OUT
24V
IN
5V
OUT
36V
IN
5V
OUT
LOAD CURRENT (A)
0
EFFICIENCY (%)
70
95
100
1 2 3
60
85
65
90
55
50
80
75
4 5
4612 G03
20V
IN
12V
OUT
24V
IN
12V
OUT
28V
IN
12V
OUT
36V
IN
12V
OUT
LOAD CURRENT (A)
0
EFFICIENCY (%)
70
100
95
1 2 3
60
85
65
90
80
75
4
5
4612 G04
28V
IN
15V
OUT
32V
IN
15V
OUT
36V
IN
15V
OUT
50µs/DIV
2A/DIV
100mV/DIV
4612 G05
LOAD STEP: 0A to 3A
C
OUT
= 2 × 22µF CERAMIC CAPACITORS AND
2 × 47µF CERAMIC CAPACITORS
50µs/DIV
2A/DIV
100mV/DIV
4612 G06
LOAD STEP: 0A to 3A
C
OUT
= 2 × 22µF CERAMIC CAPACITORS AND
2 × 47µF CERAMIC CAPACITORS
50µs/DIV
2A/DIV
200mV/
DIV
4612 G07
LOAD STEP: 0A to 3A
C
OUT
= 2 × 22µF CERAMIC CAPACITORS AND
2 × 47µF CERAMIC CAPACITORS
500µs/DIV
I
IN
0.2A/DIV
V
OUT
5V/DIV
4612 G08
SOFT-START CAPACITOR: 3.9nF
C
IN
= 3 × 10µF CERAMIC CAPACITORS AND
1 × 47µF OSCON CAPACITOR
500µs/DIV
I
IN
1A/DIV
V
OUT
5V/DIV
4612 G09
SOFT-START CAPACITOR: 3.9nF
C
IN
= 3 × 10µF CERAMIC CAPACITORS AND
1 × 47µF OSCON CAPACITOR