ISL78322 Datasheet, PDF (3/18 Pages) Intersil Corporation – Dual 2A/1.7A Low Quiescent Current 2.25MHz High Efficiency Synchronous Buck Regulator

Block Diagram
ISL78322
SSOoFfTt -
S H U T D O W N ^{S TSAtaRrTt}
EN1
BANDG AP ^0.6V
EAMP
27pF
250k
+
COMP
FB1
1.6k
3pF
SLOPE
COMP
+
0 .2 V
SCP
+
V IN
1M
+
0 .5 4 6 V
PG
1ms
DELAY
O S C IL L A T O R
VCC SHUTDOWN
PW M /PFM
LO G IC
CONTROLLER
P R O T E C T IO N
D R IV E R
+
OCP
+
CSA1
1.25V
+
S K IP
0.265V
N E G A T IV E
CURRENT LIM IT
ZERO - CROSS
S E N S IN G
S OS oF fTt-
S TSAtRa rTt
SHUTDOWN
EN2
B A N D G AP ^0.6V
EAMP
27pF
250k
+
COMP
FB2
1.6k
3pF
SLOPE
COMP
+
0 .2 V
SCP
+
THERMAL
SHUT DOWN
SHUTDOWN
VCC
SHUTDOWN
PW M /PFM
L O G IC
CONTROLLER
PRO TECTIO N
D R IV E R
+
OCP
+
CSA2
1.1V
+
0 .5 4 6 V
+
S K IP
0.265V
N E G A T IV E
CURRENT LIM IT
ZERO-CROSS
S E N S IN G
V IN 1
LX1
PGND
SYNC
V IN 2
LX2
PGND
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FN7908.2
August 26, 2014