MAX649 Maxim, MAX649 Datasheet - Page 5

• Manufacturer Part Number: MAX649
• Description: 5V/3.3V/3V or Adjustable / High-Efficiency /
• Manufacturer: Maxim

(T
____________________________Typical Operating Characteristics (continued)
A
1100
1000
= +25°C, unless otherwise noted.)
900
800
700
600
130
120
110
100
90
80
70
60
50
40
30
20
-60
-60
C
-40
-40
EXT
= 1nF
EXT RISE AND FALL TIMES
-20
-20
vs. TEMPERATURE (1nF)
DROPOUT VOLTAGE
vs. TEMPERATURE
5V/3.3V/3V or Adjustable, High-Efficiency,
0
TEMPERATURE (°C)
0
TEMPERATURE (°C)
20
20
_______________________________________________________________________________________
40
40
I
CIRCUIT OF FIGURE 1
LOAD
V+ = 5V, t
V+ = 5V, t
60
60
= 1A
Low I
V+ = 12V, t
V+ = 12V, t
80
80
FALL
RISE
MAX649
MAX652
100
100
MAX651
120
120
FALL
RISE
140
140
Q
, Step-Down DC-DC Controllers
500
450
400
350
300
250
200
150
100
235
230
225
220
215
210
205
200
195
190
185
250
200
150
100
50
50
0
-60
-60
-60
C
-40
-40
REFERENCE OUTPUT RESISTANCE
EXT
-40
= 5nF
EXT RISE AND FALL TIMES
-20
-20
-20
vs. TEMPERATURE (5nF)
V+ = 5V, t
vs. TEMPERATURE
vs. TEMPERATURE
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
0
TEMPERATURE (°C)
CS TRIP LEVEL
V+ = 5V, t
20
20
20
FALL
40
40
40
V+ = 12V, t
RISE
I
60
60
REF
60
I
REF
V+ = 12V, t
= 10 A
I
80
80
REF
= 100 A
80
RISE
= 50 A
100
100
100
FALL
120
120
120
140
140
140
1000
1.506
1.504
1.502
1.500
1.498
1.496
1.494
1.492
900
800
700
600
500
400
300
200
100
0
-60
0
MAX652, V
-40
0.2
REFERENCE OUTPUT VOLTAGE
-20
0.4
OUT
DROPOUT VOLTAGE
vs. LOAD CURRENT
vs. TEMPERATURE
LOAD CURRENT (A)
0
TEMPERATURE (°C)
= 3V
0.6
MAX649, V
20
0.8
MAX651, V
40
OUT
60
1.0
= 5V
80
OUT
1.2
100
= 3.3V
1.4 1.6
120
140
5