MAX1970EEE(2002) 查看數據表（PDF） - Maxim Integrated
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MAX1970EEE
(Rev.:2002)
(Rev.:2002)
Maxim Integrated
MAX1970EEE Datasheet PDF : 20 Pages
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Dual, 180° Out-of-Phase, 1.4MHz, 750mA Step-
Down Regulator with POR and RSI/PFO
(TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
EFFICIENCY vs. LOAD CURRENT
100
90
VOUT2 = 2.5V
80 VOUT1 = 3.3V
70
60
50
VOUT1 = 1.8V
40
30
20
10
0
0.01
VOUT2 = 1.5V
MAX1970/
MAX1972
VIN = 5.0V
0.1
1
LOAD CURRENT (A)
EFFICIENCY vs. LOAD CURRENT
100
VOUT2 = 2.5V
90
80
70
VOUT1 = 1.8V VOUT2 = 1.5V
60
50
40
30
20
10
0
0.01
MAX1971
VIN = 3.3V
0.1
1
LOAD CURRENT (A)
EFFICIENCY vs. LOAD CURRENT
100
90
VOUT1 = 3.3V
80
70
VOUT1 = 1.8V
60
VOUT2 = 1.5V
50
40
VOUT2 = 2.5V
30
20
MAX1971
10
VIN = 5.0V
0
0.01
0.1
1
LOAD CURRENT (A)
INPUT CURRENT vs. OUTPUT CURRENT
500
VIN = 5.0V
450
VOUT1 = 3.3V
400
350
VOUT2 = 2.5V
300
250
200
150
VOUT1 = 1.8V
100
VOUT2 = 1.5V
50
MAX1970/MAX1972
0
0 100 200 300 400 500 600 700 800
OUTPUT CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
100
VOUT2 = 2.5V
90
80
70
60
VOUT1 = 1.8V
VOUT2 = 1.5V
50
40
30
20
10
0
0.01
MAX1970/
MAX1972
VIN = 3.3V
0.1
1
LOAD CURRENT (A)
REFERENCE VOLTAGE vs.
REFERENCE LOAD CURRENT
1.22
1.21
1.20
1.19
1.18
1.17
0
5
10
15
20
REFERENCE LOAD CURRENT (µA)
OSCILLATOR FREQUENCY
vs. INPUT VOLTAGE
1.60
MAX1970/MAX1972
1.40
TA = +25°C
1.20
TA = +85°C
TA = -40°C
1.00
MAX1971
0.80
TA = +85°C
0.60
0.40
2.5
TA = +25°C
TA = -40°C
3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
CHANGE IN OUTPUT VOLTAGE
vs. LOAD CURRENT
3
2
1
VOUT1 = 1.8V VOUT1 = 3.3V
0
-1
-2 VIN = 5.0V
VOUT2 = 2.5V
VOUT2 = 1.5V
MAX1970/MAX1972
-3
0
200
400
600
800
LOAD CURRENT (mA)
_______________________________________________________________________________________ 7
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