XR79106 Datasheet, PDF (14/19 Pages) Exar Corporation – 22V, 6A Synchronous Step-Down

Applications Information (Continued)
XR79106
D1
MMSZ4685-TP
RZ
VIN
10k, 1%
R1
24.3k, 1%
2 - 3 = DCM/CCM
3
J1
2
1
1 - 2 = CCM
C1
0.22µF
R2
35.7k, 1%
PGOOD
CSS
47nF
RON
7.15k
RPGOOD
VCC
10k
SW
RLIM
1.62k
FB
VIN
VCC
CIN
0.1µF
CVCC
4.7µF
1
2
3
SS
PGOOD
FB
4
5
AGND
AGND
6
7
8
VIN
VCC
PGND
9
10
11
12
SW
SW
SW
SW
13 _PGND
BST
AGND
SW
PGND
PVIN
VOUT
PGND
PGND
PGND
41
40
39
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
38
37
36
35
34
33
32
31
30
29
SW
XR79106
VIN = 4.5V to 22V
VIN
VIN
0.1µF 22µF
22µF
RR
42k
CR
2.2nF
600kHz, 1.2V, 6A
VOUT
0.1µF 47µF
47µF 47µF
CAC
22nF
CFF
RFF
FB
RFB1
2k, 1%
0.1µF
RFB2
2k, 1%
Figure 27. Typical Application Circuit
REV1B
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