MAX8855ETJ+ Maxim Integrated Products, MAX8855ETJ+ Datasheet - Page 9

• Manufacturer Part Number: MAX8855ETJ+
• Description: IC REG STP DWN DUAL 5A 32-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX8855ETJ+

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 2
• Voltage - Output: 0.6 ~ 3.24 V
• Current - Output: 5A
• Frequency - Switching: 500kHz ~ 2MHz
• Voltage - Input: 2.35 ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-TQFN Exposed Pad
• Power - Output: 2.76W
• Output Current: 5 A
• Input Voltage: 2.35 V to 3.6 V
• Supply Current: 2.8 mA
• Switching Frequency: 2 MHz
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 1. Functional Diagram
COMP1
COMP2
REFIN
V
EN1
EN2
SS1
SS2
FB1
FB2
DD
REF
FROM SS2 (0.6V)
_______________________________________________________________________________________
COMP LOW
COMP LOW
DETECTOR
DETECTOR
AMPLIFIER
AMPLIFIER
SHUTDOWN
Dual, 5A, 2MHz Step-Down Regulator
+
+
-
-
ERROR
ERROR
THERMAL
SOFT-START 1
SOFT-START 2
MAX8855
SHUTDOWN
GENERATOR
REFERENCE
CONTROL
VOLTAGE
BIAS
REF
COMPARATOR
COMPARATOR
+
+
-
-
THERMAL
SHUTDOWN1
THERMAL
SHUTDOWN2
PWM
PWM
IN2
CIRCUITRY
UVLO
V
DD
IN1
CLOCK
540mV
540mV
CURRENT-LIMIT
EN2
EN1
0.9 x V
COMPARATOR
0.9 x V
CLOCK
CLOCK
SHUTDOWN1
REFIN
CURRENT-LIMIT
SS2
COMPARATOR
THERMAL
REFIN
FB1
FB2
SS2
CONTROL
CONTROL
DC
DC
LOGIC
LOGIC
+
+
+
-
+
-
+
-
+
-
THRESHOLD
THRESHOLD
-
-
CHARGING
ILIM
ILIM
BST CAP
THERMAL
SHUTDOWN2
SWITCH
OSCILLATOR
SHDN
SHDN
IN1
LX1
IN2
LX2
CHARGING
BST CAP
SWITCH
VDL
PWRGD1
PWRGD2
PGND1
PGND2
FSYNC
BST1
BST2
GND
VDL
LX1
LX2
IN1
IN2
9