MAX1649 Datasheet, PDF (4/12 Pages) Maxim Integrated Products – 5V/3.3V or Adjustable, High-Efficiency, Low-Dropout, Step-Down DC-DC Controllers

5V/3.3V or Adjustable, High-Efficiency,
Low-Dropout, Step-Down DC-DC Controllers
____________________________Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
SWITCH ON-TIME
vs. TEMPERATURE
34.0
33.5
33.0
32.5
32.0
31.5
31.0
30.5
30.0
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
SWITCH OFF-TIME
vs. TEMPERATURE
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
MAXIMUM DUTY CYCLE
vs. TEMPERATURE
100
99
98
97
96
95
94
93
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
CS TRIP LEVEL
vs. TEMPERATURE
120
115
110
105
100
95
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
DROPOUT VOLTAGE
vs. LOAD CURRENT
600
CIRCUIT OF
FIGURE 1
500
400 _{VOUT = 4.80V}
300
VOUT = 3.17V
200
100
0
0
0.5
1.0
1.5
2.0
LOAD CURRENT (A)
REFERENCE OUTPUT RESISTANCE
vs. TEMPERATURE
250
200
IREF = 10µA
150
IREF = 50µA
100
50
IREF = 100µA
0
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
REFERENCE OUTPUT VOLTAGE
vs. TEMPERATURE
1.506
1.504
1.502
1.500
IREF = 10µA
1.498
1.496
1.494
1.492
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
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