XR79103EL-F Datasheet, PDF (14/20 Pages) Exar Corporation – 22V, 3A Synchronous Step-Down COT Power Module

Applications Information (Continued)
D1
MMSZ4685-TP
RZ
VIN
10k
2 - 3 = DCM/CCM
3
J1
2
1
1 - 2 = CCM
R1
24.3k, 1%
C1
0.22µF, 16V
R2
35.7k, 1%
PGOOD
RPGOOD
VCC
10k
CSS
47nF
RON
7.15k
SW
RLIM
0.8k
FB
VIN
VCC
CIN
0.1µF
CVCC
4.7µF
1
2
3
SS
PGOOD
FB
4 _AGND
BST
AGND
5
6
7
VIN
VCC
PGND
8 _SW
SW
9
10
PGND
PGND
PVIN
SW
VOUT
PVIN ³¹
PGND
PGND
30
29
SW
SW
SW
SW
28
27
26
25
VOUT
VOUT
VOUT
24
23
22
XR79103
XR79103
VIN = 4.5V to 22V
VIN
VIN
0.1µF 22µF
RR
42k
CAC
22nF
CR
2.2nF
RFF
CFF
FB
600kHz, 1.2V, 3A
VOUT
0.1µF 47µF
47µF
RFB1
2k, 1%
0.1µF
RFB2
2k, 1%
Figure 27. Typical Application Circuit
REV1B
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