MAX786 Просмотр технического описания (PDF) - Maxim Integrated
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MAX786 Datasheet PDF : 20 Pages
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Dual-Output Power-Supply
Controller for Notebook Computers
________________________________________________Typical Operating Characteristics
(Circuit of Figure 1, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. +5V OUTPUT
CURRENT, 200kHz
EFFICIENCY vs. +5V OUTPUT
CURRENT, 300kHz
EFFICIENCY vs. +3.3V OUTPUT
CURRENT, 200kHz
100
100
100
90 VIN = 6V
80
VIN = 30V
VIN = 15V
90
VIN = 6V
80
VIN = 30V
VIN = 15V
VIN = 15V
90
VIN = 6V
80
VIN = 30V
70
70
SYNC = 0V, +3.3V OFF
60
60
+3.3V OFF
70
60
SYNC = 0V, +5V ON
50
1m
10m
100m
1
10
+5V OUTPUT CURRENT (A)
50
1m
10m
100m
1
10
+5V OUTPUT CURRENT (A)
50
1m
10m
100m
1
10
+3.3V OUTPUT CURRENT (A)
EFFICIENCY vs. +3.3V OUTPUT
CURRENT, 300kHz
100
90
VIN = 6V
VIN = 15V
80
VIN = 30V
70
+5V ON
60
QUIESCENT SUPPLY CURRENT vs.
SUPPLY VOLTAGE
19
18
ON3 = ON5 = HIGH
2
1
STANDBY SUPPLY CURRENT vs.
SUPPLY VOLTAGE
2.5
2.0
1.5
ON3 = ON5 = 0V
1.0
0.5
50
1m
10m
100m
1
10
+3.3V OUTPUT CURRENT (A)
0
0
6
12
18
24
30
SUPPLY VOLTAGE (V)
0
0
6
12
18
24
30
SUPPLY VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT vs.
SUPPLY VOLTAGE
500
400
300
SHDN = 0V
200
100
0
0
6
12
18
24
30
SUPPLY VOLTAGE (V)
MINIMUM VIN TO VOUT DIFFERENTIAL
vs. +5V OUTPUT CURRENT
1.0
0.8
300kHz
0.6
0.4
0.2
0
1m
200kHz
+5V OUTPUT
STILL REGULATING
10m
100m
1
10
+5V OUTPUT CURRENT (A)
SWITCHING FREQUENCY vs.
LOAD CURRENT
1000
SYNC = REF (300kHz)
ON3 = ON5 = 5V
100
+5V, VIN = 7.5V
10 +5V, VIN = 30V
1
+3.3V, VIN = 7.5V
0.1
100µ
1m
10m 100m
1
LOAD CURRENT (A)
4 _______________________________________________________________________________________
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