MAX777L 查看數據表（PDF） - Maxim Integrated
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MAX777L Datasheet PDF : 12 Pages
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Low-Voltage Input, 3V/3.3V/5V/
Adjustable Output, Step-Up DC-DC Converters
__________________________________________Typical Operating Characteristics
(Typical Operating Circuit, TA = +25°C, unless otherwise noted).
NO-LOAD SUPPLY CURRENT
vs. VOLTAGE AND TEMPERATURE
300
(SWITCH = OFF)
280
260
TA = +85°C
240
220
SHUTDOWN SUPPLY CURRENT
vs. INPUT VOLTAGE AND TEMPERATURE
80
70
60
50
TA = +85°C
MAX778L
SHDN THRESHOLD VOLTAGE
vs. INPUT VOLTAGE AND TEMPERATURE
3.5
3.0
2.5
TA = +125°C
200
40
2.0
180
160
TA = +25°C
140
120
TA = -40°C TA = 0°C
100
1
23
45 67
SUPPLY VOLTAGE (V)
30
20
TA = 0°C
10
TA = -40°C
0
1 23
45 67
INPUT VOLTAGE (V)
1.5
1.0
TA = +25°C
TA = -55°C
0.5
1 23
45 67
INPUT VOLTAGE (V)
MAX777L/MAX779L
EFFICIENCY vs. LOAD CURRENT
90
VOUT = 5V
80
MAX778L
EFFICIENCY vs. LOAD CURRENT
90
VOUT = 3.3V OR 3.0V
80
70
70
60
60
50
40
30
0.1
VIN = 4V
VIN = 2.5V
VIN = 1.8V
VIN = 1.5V
VIN = 1.1V
1
10
100
LOAD CURRENT (mA)
1000
MAX777L/MAX779L
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
300
VOUT = 5V
250
200
150
100
50
50
40
30
0.1
VIN = 2.5V
VIN = 1.8V
VIN = 1.5V
VIN = 1.1V
1
10
100
LOAD CURRENT (mA)
1000
MAX778L
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
350
VOUT = 3.3V
300
250
200
150
100
50
0
0.5
1.0
1.5
2.0
2.5
INPUT VOLTAGE (V)
0
0.5
1.0
1.5
2.0
INPUT VOLTAGE (V)
4 _______________________________________________________________________________________
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