MAX1652 데이터 시트보기 (PDF) - Maxim Integrated
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MAX1652 Datasheet PDF : 28 Pages
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High-Efficiency, PWM, Step-Down
DC-DC Controllers in 16-Pin QSOP
____________________________________Typical Operating Characteristics (continued)
(Circuit of Figure 1, SKIP = GND, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs.
LOAD CURRENT (3.3V/5A CIRCUIT)
100
V+ = 6V
90
EFFICIENCY vs.
LOAD CURRENT (5V/3A CIRCUIT)
100
V+ = 6V
90
EFFICIENCY vs.
LOAD CURRENT (1.8V/2.5A CIRCUIT)
100
MAX1655
f = 300kHz
90
V+ = 6V
80
V+ = 28V
70
60
50
0.001
V+ = 12V
MAX1653
f = 300kHz
0.01
0.1
1
10
LOAD CURRENT (A)
IDLE-MODE SUPPLY CURRENT vs.
INPUT VOLTAGE (3.3V/3A CIRCUIT)
10
MAX1653
SKIP = 0
NO LOAD
1
0.1
0.01
0
5 10 15 20 25 30
INPUT VOLTAGE (V)
80
V+ = 28V
V+ = 12V
70
60
50
0.001
MAX1653
f = 300kHz
0.01
0.1
1
10
LOAD CURRENT (A)
PWM-MODE SUPPLY CURRENT vs.
INPUT VOLTAGE (3.3V/3A CIRCUIT)
30
MAX1653
25
SKIP = VL
f = 300kHz
NO LOAD
20
15
10
5
0
0 5 10 15 20 25 30
INPUT VOLTAGE (V)
80
70
V+ = 24V
60
V+ = 12V
50
0.001
0.01
0.1
1
10
LOAD CURRENT (A)
SHUTDOWN SUPPLY CURRENT
vs. INPUT VOLTAGE
10
SHDN = 0V
8
6
4
2
0
0 5 10 15 20 25 30
INPUT VOLTAGE (V)
REF LOAD-REGULATION ERROR
vs. REF LOAD CURRENT
30
25
20
15
10
5
0
0 50 100 150 200 250 300 350 400
LOAD CURRENT (µA)
VL LOAD-REGULATION ERROR
vs. VL LOAD CURRENT
50
45
40
35
30
25
20
15
10
5
0
0 10 20 30 40 50 60 70 80
LOAD CURRENT (mA)
MAX1652 MAXIMUM SECONDARY OUTPUT
CURRENT vs. SUPPLY VOLTAGE
1500
VSEC > 12.75V,
+5V OUTPUT > 4.75V,
1200 CIRCUIT OF FIGURE 9
900
+5V LOAD = 0A
600
+5V LOAD = 3A
300
0
0 5 10 15 20 25 30
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________ 7
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