MAX1953EUB+ Maxim Integrated Products, MAX1953EUB+ Datasheet - Page 9

• Manufacturer Part Number: MAX1953EUB+
• Description: IC CNTRLR PWM BUCK 10-UMAX
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX1953EUB+

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.8 ~ 4.73 V
• Current - Output: 10A
• Frequency - Switching: 1MHz
• Voltage - Input: 3 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Power - Output: 444mW
• Output Voltage: 0.8 V
• Input Voltage: 3 V to 5.5 V
• Supply Current: 1 mA
• Switching Frequency: 1 MHz
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Duty Cycle (max): 89 %
• Output Current: 4000 mA
• Mounting Style: SMD/SMT
• Synchronous Pin: No
• Topology: Boost, Buck
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Low-Cost, High-Frequency, Current-Mode PWM
(MAX1957
COMP
REFIN
ONLY)
GND
_______________________________________________________________________________________
FB
COMPARATOR
SHUTDOWN
0.5V
3V TO 5.5V
SOFT-START
INPUT
REFERENCE
AMPLIFIER
ERROR
AND
DAC
ILIM
COMP
GND
MAX1953
IN
THERMAL
LIMIT
CLOCK
PGND
COMPENSATION
BST
DH
LX
DL
FB
SLOPE
CIRCUITRY
CONTROL
PWM
UVLO
IN
SHORT-CIRCUIT
CURRENT-LIMIT
CIRCUITRY
Typical Operating Circuit
CIRCUITRY
CURRENT-
SENSE
Buck Controller
0.8V TO 0.86V
CURRENT-LIMIT
COMPARATOR
OUTPUT
MAX1953
MAX1954
MAX1957
Functional Diagram
IN
IN
HSD
(MAX1954
ONLY)
(MAX1953
BST
DH
LX
DL
PGND
ONLY)
ILIM
9