Ultra-High Efficiency, Dual Step-Down
Controller for Notebook Computers
MAX1715
_____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 1, components from Table 1, V
IN
= +15V,
SKIP
= AGND, TON = unconnected, T
A
= +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
(2.5V, 4A COMPONENTS, SKIP = V
CC
)
MAX1715-04
EFFICIENCY vs. LOAD CURRENT
(5V, 3A COMPONENTS, SKIP = GND)
MAX1715-05
EFFICIENCY vs. LOAD CURRENT
(5V, 3A COMPONENTS, SKIP = V
CC
)
V+ = +7V
80
V+ = +12V
MAX1715-06
100
100
V+ = +7V
90
EFFICIENCY (%)
V+ = +12V
80
V+ = +20V
100
80
EFFICIENCY (%)
V+ = +7V
V+ = +12V
60
V+ = +20V
40
EFFICIENCY (%)
60
V+ = +20V
40
20
70
20
0
0.01
0.1
1
10
LOAD CURRENT (A)
60
0.01
0.1
1
10
LOAD CURRENT (A)
0
0.01
0.1
1
10
LOAD CURRENT (A)
EFFICIENCY vs. LOAD CURRENT
(3.3V, 1.5A COMPONENTS, V
IN
= 5V)
MAX1715-07
EFFICIENCY vs. LOAD CURRENT
(1.3V, 8A COMPONENTS, SKIP = GND)
MAX1715-08
EFFICIENCY vs. LOAD CURRENT
(1.3V, 8A COMPONENTS, SKIP = V
CC
)
V+ = +7V
80
V+ = +12V
EFFICIENCY (%)
MAX1715-9
100
SKIP = GND
80
100
100
V+ = +7V
EFFICIENCY (%)
EFFICIENCY (%)
SKIP = V
CC
60
60
V+ = +20V
40
80
V+ = +12V
V+ = +20V
40
20
60
0.001
0.01
0.1
LOAD CURRENT (A)
1
10
0.01
0.1
1
10
LOAD CURRENT (A)
20
0
0
0.01
0.1
1
10
LOAD CURRENT (A)
FREQUENCY vs. LOAD CURRENT
(4A COMPONENTS)
MAX1715-10
FREQUENCY vs. SUPPLY VOLTAGE
(4A COMPONENTS, SKIP = V
CC
)
OUT1
300
FREQUENCY (kHz)
MAX1715-11
400
OUT1, SKIP = V
CC
300
FREQUENCY (kHz)
OUT2, SKIP = V
CC
200
OUT1, SKIP = GND
100
OUT2, SKIP = GND
0
0.01
0.1
1
400
OUT2
200
100
0
10
4
8
12
16
20
24
LOAD CURRENT (A)
SUPPLY VOLTAGE (V)
6
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