MAX1957EUB+ Maxim Integrated Products, MAX1957EUB+ Datasheet - Page 12

• Manufacturer Part Number: MAX1957EUB+
• Description: IC CNTRLR PWM BUCK 10-UMAX
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX1957EUB+

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.4 ~ 4.73 V
• Current - Output: 3A
• Frequency - Switching: 300kHz
• 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
• Duty Cycle (max): 89 %
• Output Voltage: 0.4 V to 4.73 V
• Output Current: 3000 mA
• Mounting Style: SMD/SMT
• Switching Frequency: 300 KHz
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Synchronous Pin: No
• Topology: Boost, Buck
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Low-Cost, High-Frequency, Current-Mode PWM
Buck Controller
Figure 1. Typical Application Circuit for the MAX1953
Figure 2. Typical Application Circuit for the MAX1954
12
______________________________________________________________________________________
1000pF
3V TO 5.5V
5.5V TO 13.2V
270pF
3V TO 5.5V
10 F
V
C
C
C1
V
IN
V
C
C
HSD
IN
62k
33k
R
R
C
C
47pF
C1
0.22 F
C
f
ILIM
COMP
GND
10 F
C6
MAX1953
HSD
COMP
GND
IN
MAX1954
4.7 F
C5
IN
PGND
BST
DH
DL
LX
FB
PGND
BST
DH
DL
LX
FB
D1
C2
0.1 F
D1
C3
0.1 F
N1
N1
1 H
L1
16.9k
8.06
2.7 H
L1
C2
10 F
R1
R2
9.09k
8.06k
R1
R2
C3
10 F
1.7V AT 3A
V
OUT
C4
180 F
2.5V AT 3A
V
OUT
C4
10 F