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MAX8833
Dual, 3A, 2MHz Step-Down Regulator
Maxim Integrated
MAX8833 Datasheet PDF : 20 Pages
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Dual, 3A, 2MHz Step-Down Regulator
BST CAP
VDL
CHARGING
V
DD
CURRENT-LIMIT
COMPARATOR
SWITCH
IN1
SHUTDOWN
CONTROL
UVLO
CIRCUITRY
DC
+ - LX1
ILIM
BIAS
IN2 VDD IN1
THRESHOLD
GENERATOR
EN1
EN2
SS1
SS2
REFIN
FB1
COMP1
VOLTAGE
REFERENCE
REF
SOFT-START 1
SOFT-START 2
+
-
ERROR
AMPLIFIER
PWM
COMPARATOR
-
+
CONTROL
LOGIC
EN1
CLOCK
THERMAL
SHUTDOWN1
BST CAP
CHARGING
SWITCH
CURRENT-LIMIT
COMPARATOR
IN2
DC
+ - LX2
ILIM
THRESHOLD
FB2
COMP2
COMP LOW
DETECTOR
FROM SS2 (0.6V)
+
-
ERROR
AMPLIFIER
COMP LOW
DETECTOR
PWM
COMPARATOR
-
+
CONTROL
LOGIC
EN2
CLOCK
THERMAL
SHUTDOWN2
CLOCK
OSCILLATOR
REFIN +
SHDN
540mV
-
FB1 +
THERMAL
REF
THERMAL
SHUTDOWN
SHUTDOWN1
THERMAL
0.9 x V
REFIN
-
SS2 +
SHDN
SHUTDOWN2
540mV
-
FB2 +
MAX8833
0.9 x V
SS2
-
BST1
IN1
LX1
PGND1
VDL
BST2
IN2
LX2
PGND2
FSYNC
PWRGD1
PWRGD2
GND
Figure 1. Functional Diagram
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