Rainbow Electronics MAX1774 - Manual (Page 15)

MAX1774
Dual, High-Efficiency, Step-Down
Converter with Backup Battery Switchover
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Figure 3. Simplified Block Diagram
LBO
DBO
1.2V
LBI
DBI
ACI
BIN
CVL
REF
SHDNM
SHDNC
LXB
1.2V
INS
0.5V
0.22V
LBO
MDRV
BKUP
BKUP
MODE
ACO
CS- (MAIN OUT)
CS+
IN
PDRV
CVH
NDRV
PGND
INC
LXC
PGNDC
GND
FBC
RDY
CS-
MAIN
BUCK
ON
CS+
EN
FB
MDRV
BKUP
NOAC
ON
CORE
BUCK
PGND
BACKUP
BOOST
FB
FBM
EN
FB
CVH
CVL REF
SOFT-START
MAX1774
MAIN
RDY
BKOFF
LXB2
(QFN ONLY)