MAX1771 데이터 시트보기 (PDF) - Maxim Integrated
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MAX1771 Datasheet PDF : 16 Pages
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12V or Adjustable, High-Efficiency,
Low IQ, Step-Up DC-DC Controller
____________________________Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
4
VOUT = 12V, VIN = 5V
CIRCUIT OF FIGURE 2a
BOOTSTRAPPED MODE
3
ENTIRE
CIRCUIT
2
1
SCHOTTKY DIODE
LEAKAGE EXCLUDED
0
-75 -50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
0.8
VOUT = 12V
0.6
BOOTSTRAPPED
CIRCUIT OF
FIGURE 2a
0.4
0.2
NON-BOOTSTRAPPED
CIRCUIT OF FIGURE 2b
0
2
4
6
8
10
12
SUPPLY VOLTAGE (V)
EXT RISE/FALL TIME vs. SUPPLY VOLTAGE
250
200
CEXT = 2200pF
CEXT = 1000pF
150
CEXT = 446pF
CEXT = 100pF
100
50
0
2
4
6
8
10
12
SUPPLY VOLTAGE (V)
REFERENCE OUTPUT RESISTANCE vs.
TEMPERATURE
250
200
10µA
150
100
50µA
100µA
50
0
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
1.506
1.504
REFERENCE vs. TEMPERATURE
1.502
1.500
1.498
1.496
1.494
1.492
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
MAXIMUM SWITCH ON-TIME vs.
TEMPERATURE
16.5
16.0
15.5
-60 -30
0 30 60 90 120 150
TEMPERATURE (°C)
SHUTDOWN CURRENT vs. TEMPERATURE
4.0
MINIMUM SWITCH OFF-TIME vs.
TEMPERATURE
2.30
MAXIMUM SWITCH ON-TIME/
MINIMUM SWITCH OFF-TIME RATIO
vs. TEMPERATURE
8.0
3.5
3.0
7.5
2.5
2.0
2.25
7.0
V+ = 15V
1.5
V+ = 8V
1.0
6.5
0.5
V+ = 4V
0
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
2.20
-60 -30
0 30 60 90 120 150
TEMPERATURE (°C)
6.0
-60 -30
0 30 60 90 120 150
TEMPERATURE (°C)
4 _______________________________________________________________________________________
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