MAX1953EUB+ Maxim Integrated Products, MAX1953EUB+ Datasheet - Page 4

• 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
Buck Controller
(T
4
A
100
= +25°C, unless otherwise noted.)
_______________________________________________________________________________________
95
90
85
80
75
70
65
60
55
50
0.1
V
EFFICIENCY vs. LOAD CURRENT
IN
= 3.3V
2.60
2.55
2.50
2.45
2.40
2.35
100
95
90
85
80
75
70
65
60
55
50
LOAD CURRENT (A)
MAX1953
0
0
OUTPUT VOLTAGE vs. LOAD CURRENT
V
1
EFFICIENCY vs. LOAD CURRENT
IN
V
CIRCUIT OF FIGURE 1
1
= 5V
OUT
5
= 2.5V
V
V
LOAD CURRENT (A)
LOAD CURRENT (A)
HSD
OUT
2
MAX1954
10
MAX1954
= V
= 1.8V
IN
3
= 5V
CIRCUIT OF FIGURE 2
V
CIRCUIT OF FIGURE 4
IN
10
15
= 12V
4
20
5
100
90
80
70
60
50
40
0.1
25
6
EFFICIENCY vs. LOAD CURRENT
V
OUT
= 2.5V
LOAD CURRENT (A)
MAX1954
V
OUT
= 1.7V
1
Typical Operating Characteristics
V
CIRCUIT OF FIGURE 2
IN
= 5V
1.80
1.75
1.70
1.65
1.60
1.55
2.60
2.55
2.50
2.45
2.40
0
0
OUTPUT VOLTAGE vs. LOAD CURRENT
OUTPUT VOLTAGE vs. LOAD CURRENT
10
0.5
1
V
V
IN
V
HSD
LOAD CURRENT (A)
1.0
LOAD CURRENT (A)
IN
2
= 3.3V
= 5V
MAX1953
MAX1954
= V
100
90
80
70
60
50
40
IN
1.5
0.1
= 5V
3
CIRCUIT OF FIGURE 2
CIRCUIT OF FIGURE 1
EFFICIENCY vs. LOAD CURRENT
2.0
4
2.5
LOAD CURRENT (A)
5
MAX1957
V
3.0
OUT
6
1
V
CIRCUIT OF FIGURE 3
= 1.25V
IN
= 5V
10