Datasheet

4
2
SGND
8
COMP1
3
ON/SS1
9
COMP2
12
28
1
26
27
V
DD
1
24
23
21
V
IN
22
VLIN5
7
SYNC
5
V
DD
2
19
UV_DELAY
6
11
13
15
14
18
17
16
20
IC1
LM5642
ON/SS2
10
+
25
C
1
C
34
R
28
C
11
C
12
R
27
R
23
R
24
C
27
C
26
C
20
C
19
C
2
R
1
Q
1
Q
2
L
1
R
10
R
11
C
3
R
2
R
7
C
4
R
6
C
6
C
7
D
3A
V
DD
C
9
1 PF
100 nF
220 k:
10 nF
10 nF
4.7 :
1 PF
4.7 PF
8.2 nF
15 nF
8.45
k:
13.7
k:
Si4840DY
Si4850EY
10 PF
50V
2.8Arms
V
IN
10 m:
10 nF
100 pF
12 k:
100:
100 pF
100:
100 nF
BAS40-06
4.2 PH
7 m:
330 PF
6.3V
10 m:
2.26
k:
4.99 k:
+
C
13
R
13
Q
4
Q
5
L
2
R
19
R
20
C
14
R
14
R
15
R
16
C
16
D
3B
V
DD
C
23
Si4840DY
Si4850EY
10 PF
50V
2.8Arms
V
IN
10 m:
10 nF
100 pF
6.8 k:
100:
100 pF
100:
100 nF
BAS40-06
10 P+
12 m:
330 PF
6.3V
10 m:
8.25
k:
4.99 k:
C
16
C
25
S
1
S
2
V
DD
SYNC
Vin = 24V+10%
Vo1 = 1.8V, 7A
Vo2 = 3.3V, 4A
FB1
ILIM1
RSNS1
KS1
CBOOT1
HDRV1
SW1
LDRV1
PGND
FB2
ILIM2
RSNS2
KS2
SW2
HDRV2
CBOOT2
LDRV2
LM5642, LM5642X
www.ti.com SNVS219K –JUNE 2003–REVISED APRIL 2013
Figure 3. Typical 2 Channel Application Circuit
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