ISL8023 INTERSIL [Intersil Corporation], ISL8023 Datasheet - Page 4

• Manufacturer Part Number: ISL8023
• Description: 3A/4A Low Quiescent Current High Efficiency Synchronous Buck Regulator
• Manufacturer: INTERSIL [Intersil Corporation]

SGND
VFB
SS
PG
EN
SHUTDOWN
BANDGAP
6k
4
0.85*VREF
START
VREF
SOFT
0.6V
Soft
0.5V
3pF
+
+
+
-
+
-
-
DELAY
1ms
-
+
EAMP
SCP
55pF
UV
FIGURE 3. FUNCTIONAL BLOCK DIAGRAM
OV
SLOPE
100k
COMP
COMP
ISL8023, ISL8024
Slope
+
-
+
COMP
FS
OSCILLATOR
SYNC
SKIP
OCP
SHUTDOWN
SHUTDOWN
+
+
-
-
PROTECTION
CONTROLLER
HS DRIVER
NEG CURRENT
ZERO-CROSS
PWM/PFM
LOGIC
SENSING
SENSING
THRESHOLD
VDD
ISET
CSA
+ +
-
100
DRIVER
LS
P
N
December 22, 2011
VIN
PHASE
PGND
FN7812.0