MAX669EUB Просмотр технического описания (PDF) - Maxim Integrated
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MAX669EUB Datasheet PDF : 18 Pages
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1.8V to 28V Input, PWM Step-Up
Controllers in µMAX
Typical Operating Characteristics
(Circuits of Figures 2, 3, 4, and 5; TA = +25°C; unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
(VOUT = 5V)
95
90
VIN = 3.6V
VIN = 3.3V
85
80
VIN = 2.7V
75
VIN = 2V
70
65
60
55
50
1
BOOTSTRAPPED
FIGURE 3
R4 = 200kΩ
10
100
1000
LOAD CURRENT (mA)
10,000
MAX669 MINIMUM START-UP VOLTAGE
vs. LOAD CURRENT
3.0
VOUT = 5V
2.5
2.0
VOUT = 12V
1.5
1.0
0.5
0
0
BOOTSTRAPPED
FIGURE 2
100 200 300 400 500 600 700 800 900 1000
LOAD CURRENT (mA)
SHUTDOWN CURRENT vs.
SUPPLY VOLTAGE
3.5
MAX669
3.0
2.5
MAX668
2.0
1.5
1.0
0.5
0
0
CURRENT INTO VCC PIN
5 10 15 20 25 30
SUPPLY VOLTAGE (V)
MAX668 EFFICIENCY vs.
LOAD CURRENT (VOUT = 12V)
95
90
85
80
75
70
1
VIN = 5V
NON-BOOTSTRAPPED
FIGURE 4
R4 = 200kΩ
10
100
1000
LOAD CURRENT (mA)
10,000
SUPPLY CURRENT vs.
SUPPLY VOLTAGE
1200
CURRENT INTO VCC PIN
1000
ROSC = 500kΩ
800
600
MAX669
400
200
0
0
MAX668
5 10 15 20 25 30
SUPPLY VOLTAGE (V)
SUPPLY CURRENT vs.
TEMPERATURE
290
270
ROSC = 100kΩ
250
230
ROSC = 200kΩ
210
ROSC = 500kΩ
190
170
150
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
MAX668 EFFICIENCY vs.
LOAD CURRENT (VOUT = 24V)
95
VIN = 12V
90
VIN = 8V
85
VIN = 5V
80
75
70
1
NON-BOOTSTRAPPED
FIGURE 4
R4 = 200kΩ
10
100
1000
LOAD CURRENT (mA)
10,000
NO-LOAD SUPPLY CURRENT vs.
SUPPLY VOLTAGE
4000
3500
VOUT = 12V
BOOTSTRAPPED
3000
FIGURE 2
R4 = 200kΩ
2500
2000
1500
1000
500
0
0 2 4 6 8 10 12
SUPPLY VOLTAGE (V)
LDO DROPOUT VOLTAGE vs.
LDO CURRENT
300
250
VIN = 3V
200
150
VIN = 4.5V
100
50
0
0.1
1
LDO CURRENT (mA)
10 20
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