MAX1744 데이터 시트보기 (PDF) - Maxim Integrated
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MAX1744 Datasheet PDF : 15 Pages
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High-Voltage, Step-Down DC-DC
Controllers in µMAX
(Circuit of Figure 1, TA = +25°C, unless otherwise specified.)
Typical Operating Characteristics
EFFICIENCY vs. LOAD CURRENT
(VOUT = +3.3V)
100
B
A
80
60
CD
40
20
0
0.0001 0.001 0.01
A: VIN = +5.5V
B: VIN = +12.0V
C: VIN = +24.0V
D: VIN = +36.0V
0.1
1
10
LOAD CURRENT (A)
IN PIN QUIESCENT CURRENT
vs. INPUT VOLTAGE (3.5V TO 5.5V)
6
5
4
3
2
1
VOUT = 3.3V
0
3.5
4.5
5.5
INPUT VOLTAGE (V)
EFFICIENCY vs. LOAD CURRENT
(VOUT = +5.0V)
100
B
A
80
C
D
60
40
20
0
0.0001
140
A: VIN = +7.2V
B: VIN = +12.0V
C: VIN = +24.0V
D: VIN = +36.0V
0.001 0.01 0.1
1
10
LOAD CURRENT (A)
SWITCHING FREQUENCY
vs. INPUT VOLTAGE
120
100
80
60
40
20
0
0
VOUT = 3.3V
IOUT = 2.0A
10
20
30
40
INPUT VOLTAGE (V)
IN PIN QUIESCENT CURRENT
vs. INPUT VOLTAGE (5.5V TO 36V)
110
105
100
95
90
85
80
0
10
20
30
40
INPUT VOLTAGE (V)
IN PIN QUIESCENT CURRENT
vs. TEMPERATURE
95
94
93
92
91
90
89
88
87
86
85
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
EXT RISE AND FALL TIMES
vs. CAPACITANCE
120
VIN = +5V
100
80
60
tFALL
40
20
0
0
tRISE
1000 2000 3000 4000 5000
CAPACITANCE (pF)
EXT RISE AND FALL TIMES
vs. TEMPERATURE
50
45
VIN = +5V
CL = 1000pF
40
tRISE
35
30
25
tFALL
20
15
10
5
0
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
CURRENT-SENSE TRIP LEVEL
vs. TEMPERATURE
115
110
105
100
95
90
85
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
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