MAX1649 Maxim, MAX1649 Datasheet - Page 4

• Manufacturer Part Number: MAX1649
• Description: 5V/3.3V or Adjustable / High-Efficiency / Low-Dropout / Step-Down DC-DC Controllers
• Manufacturer: Maxim

5V/3.3V or Adjustable, High-Efficiency,
Low-Dropout, Step-Down DC-DC Controllers
(T
4
____________________________Typical Operating Characteristics (continued)
A
= +25°C, unless otherwise noted.)
34.0
33.5
33.0
32.5
32.0
31.5
31.0
30.5
30.0
_______________________________________________________________________________________
-60
-40
120
115
110
105
100
250
200
150
100
-20
95
50
0
vs. TEMPERATURE
-60
-60
SWITCH ON-TIME
TEMPERATURE (°C)
0
-40
REFERENCE OUTPUT RESISTANCE
-40
20
-20
-20
40
vs. TEMPERATURE
vs. TEMPERATURE
TEMPERATURE (°C)
60
0
0
TEMPERATURE (°C)
CS TRIP LEVEL
20
80
20
100
40
40
120
I
60
REF
60
I
REF
= 10 A
140
I
80
REF
= 100 A
80
= 50 A
100
100
120
120
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
140
140
-60
-40
-20
vs. TEMPERATURE
SWITCH OFF-TIME
TEMPERATURE (°C)
0
20
40
60
80
100
1.506
1.504
1.502
1.500
1.498
1.496
1.494
1.492
600
500
400
300
200
100
120
0
140
-60
0
CIRCUIT OF
FIGURE 1
V
-40
OUT
REFERENCE OUTPUT VOLTAGE
-20
= 4.80V
0.5
100
DROPOUT VOLTAGE
vs. LOAD CURRENT
vs. TEMPERATURE
99
98
97
96
95
94
93
LOAD CURRENT (A)
0
V
TEMPERATURE (°C)
OUT
-60
20
= 3.17V
-40
1.0
40
-20
MAXIMUM DUTY CYCLE
60
vs. TEMPERATURE
TEMPERATURE (°C)
I
REF
0
80
1.5
= 10 A
20
100
40
120
60
140
2.0
80
100
120
140