Rainbow Electronics MAX1625 - Manual (Page 9)

MAX1624/MAX1625
High-Speed Step-Down Controllers with
Synchronous Rectification for CPU Power
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N1
R1
N2
C2
D1
(OPTIONAL)
R9
(OPTIONAL)
R10
(OPTIONAL)
R8
39 Ω
C12
4.7nF
C11
4.7nF
V CC V DD
CSH
PWROK CSL
BST
DH
LX
DL
PGND
FB
PDRV
NDRV
AGND
REF
CC1
CC2
CC2
CC1 RC1
TO
AGND
C6, 1.0 µ F
CERAMIC
R4, 40.1k
FOR 500kHz
R5
100k
C9
0.1 µ F
C7
4.7 µ F
R6
100 Ω
TO V DD
FREQ
D0
D1
D2
D3
D4
LG REF
C5
0.1 µ F
C8
4.7 µ F
D2
CMPSH-3
C4
0.1
µ F
L1
V IN = 5V
C1
R7
39 Ω
LOCAL
BYPASSING
MAX1624
P1
R11
V OUT = 1.1V
TO 3.5V
N3
LOAD
Figure 1. MAX1624 Standard Application Circuit