Linear Technology EN55022B, Руководство пользователя

Страница: 21 / 28

LTM4612
21
4612fc
For more information www.linear.com/LTM4612
APPLICATIONS INFORMATION
Figure 19. Typical 5V to 36V
IN
, 3.3V at 5A Design with 400kHz Frequency
Figure 18. Typical 22V to 36V
IN
, 12V at 5A Design
PGOOD
RUN
COMP
INTV
CC
DRV
CC
f
SET
TRACK/SS
FCB
MARG0
MARG1
MPGM
V
OUT
V
FB
PULL-UP SUPPLY ≤ 5V
R3
100k
C4
0.01µF
C3
22pF
C
OUT1
22µF
6.3V
C
OUT2
220µF
6.3V
C
IN
10µF
50V CERAMIC
V
IN
5V TO 36V
CLOCK SYNC
REFER TO TABLE 2
EXTERNAL 5V SUPPLY
IMPROVES EFFICIENCY—
ESPECIALLY FOR HIGH
INPUT VOLTAGES
ON/OFF
LTM4612
SGND PGND
MARGIN
CONTROL
R4
100k
R
fSET
191k
1%
R
FB
22.1k
R1
392k
5% MARGIN
+
4612 F19
V
D
V
IN
PLLIN
C1
10µF
50V
V
OUT
3.3V
5A
PGOOD
RUN
COMP
INTV
CC
DRV
CC
f
SET
TRACK/SS
FCB
MARG0
MARG1
MPGM
V
OUT
V
FB
PULL-UP SUPPLY ≤ 5V
R3
100k
C4
0.01µF
C3
22pF
C
OUT1
22µF
16V
C
OUT2
220µF
16V
C
IN
10µF
50V CERAMIC
V
IN
22V TO 36V
CLOCK SYNC
REFER TO TABLE 2
ON/OFF
LTM4612
SGND PGND
MARGIN
CONTROL
R4
100k
R
FB
5.23k
R1
392k
5% MARGIN
+
4612 F18
V
D
V
IN
PLLIN
C1
10µF
50V
R5
2M
V
OUT
12V
5A