MAX1953 データシートの表示（PDF） - Maxim Integrated
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MAX1953 Datasheet PDF : 22 Pages
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Low-Cost, High-Frequency, Current-Mode PWM
Buck Controller
(TA = +25°C, unless otherwise noted.)
MAX1953
EFFICIENCY vs. LOAD CURRENT
100
95 VIN = 3.3V
90
85
80
VIN = 5V
75
70
65
60
55
50
0.1
VOUT = 2.5V
CIRCUIT OF FIGURE 1
1
10
LOAD CURRENT (A)
Typical Operating Characteristics
MAX1954
EFFICIENCY vs. LOAD CURRENT
100
VOUT = 2.5V
90
80
VOUT = 1.7V
70
60
50
40
0.1
VIN = 5V
CIRCUIT OF FIGURE 2
1
10
LOAD CURRENT (A)
MAX1957
EFFICIENCY vs. LOAD CURRENT
100
90
80
VOUT = 1.25V
70
60
50
40
0.1
VIN = 5V
CIRCUIT OF FIGURE 3
1
10
LOAD CURRENT (A)
100
95
90
85
80
75
70
65
60
55
50
0
MAX1954
EFFICIENCY vs. LOAD CURRENT
VOUT = 1.8V
VIN = 12V
CIRCUIT OF FIGURE 4
5
10
15
20
25
LOAD CURRENT (A)
MAX1953
OUTPUT VOLTAGE vs. LOAD CURRENT
2.60
2.55
VIN = 5V
2.50
VIN = 3.3V
2.45
2.40
0
CIRCUIT OF FIGURE 1
0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (A)
MAX1954
OUTPUT VOLTAGE vs. LOAD CURRENT
2.60
MAX1954
OUTPUT VOLTAGE vs. LOAD CURRENT
1.80
2.55
1.75
2.50
VHSD = VIN = 5V
2.45
1.70
VHSD = VIN = 5V
1.65
2.40
2.35
0
CIRCUIT OF FIGURE 2
123456
LOAD CURRENT (A)
1.60
1.55
0
CIRCUIT OF FIGURE 2
123456
LOAD CURRENT (A)
4 _______________________________________________________________________________________
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