Datasheet

FB1
4
ILIM1
2
SGND
8
COMP1
3
ON/SS1
9
COMP2
12
HDRV1
26
KS1
1
CBOOT1
RSNS1
28
SW1
27
24
LDRV1
23
PGND
21
22
VLIN5
7
SYNC
5
19
UV_DELAY
6
FB2
11
ILIM2
13
HDRV2
17
KS2
14
SW2
18
RSNS2
15
CBOOT2
16
LDRV2
20
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
2
L
1
R
10
R
11
C
29
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
1 PF
50V
V
IN
10 nF
33 k:
100 nF
BAT54A
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
31
D
3B
V
DD
C
23
Si4840DY
Si4850EY
1 PF
50V
V
IN
10 nF
22 k:
100 nF
BAT54A
10 PH
12 m:
330 PF
6.3V
10 m:
2.26
k:
4.99 k:
C
25
S
1
S
2
V
DD
SYNC
Vo1 = 1.8V, 5A
Vo2 = 3.3V, 4A
V
IN
Q
1
C
16
10 PF
50V
2.8Arms
C
6
10 PF
50V
2.8Arms
V
IN
V
DD1
V
DD2
Additional Footprints www.ti.com
Figure 3. Standard V
DS
Sense Circuit
6
AN-1292 LM5642 Evaluation Board SNVA070B–May 2004–Revised April 2013
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