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MAX1678 View Datasheet(PDF) -

Part Name
Description
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MAX1678
 
MAX1678 Datasheet PDF : 0 Pages
1-Cell to 2-Cell, Low-Noise,
High-Efficiency, Step-Up DC-DC Converter
Typical Operating Characteristics
(Circuit of Figure 7 (Fixed Mode, 3.3V) or Figure 8 (Adjustable Mode), TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
(VOUT = 2.4V, L1 = 22µH)
100
90
VIN = 2.0V
80
VIN = 1.5V
70
60
50
40
VIN = 0.85V VIN = 1.2V
30
20
10
0
0.01
L1 = 22µH
SUMIDA CD43-220
R1 = 200k, R2 = 200k
0.1
1
10
LOAD CURRENT (mA)
100 200
EFFICIENCY vs. LOAD CURRENT
(VOUT = 3.3V, L1 = 22µH)
100
90
VIN = 2.5V
VIN = 1.5V
80
VIN = 2.0V
70
60
VIN = 1.2V
50
VIN = 0.85V
40
30
20
10
0
0.01
L1 = 22µH
SUMIDA CD43-220
FB = GND
0.1
1
10
LOAD CURRENT (mA)
100 200
EFFICIENCY vs. LOAD CURRENT
(VOUT = 5.0V, L1 = 22µH)
100
90
VIN = 4.5V
80
VIN = 3.0V
70
VIN = 2.0V
60
VIN = 1.2V
50
VIN = 0.85V
40
30
20
10
0
0.01
L1 = 22µH
SUMIDA CD43-220
R1 = 619k, R2 = 200k
0.1
1
10
LOAD CURRENT (mA)
100 200
EFFICIENCY vs. LOAD CURRENT
(VOUT = 2.4V, L1 = SUMIDA 47µH)
100
90
VIN = 1.5V
VIN = 2.0V
80
70
60
VIN = 1.2V
50
VIN = 0.85V
40
30
20
10
0
0.01
L1 = 47µH
SUMIDA CD43-470
R1 = 200k, R2 = 200k
0.1
1
10
LOAD CURRENT (mA)
100 200
EFFICIENCY vs. LOAD CURRENT
(VOUT = 3.3V, L1 = SUMIDA 47µH)
100
90
VIN = 2.5V
VIN = 2.0V
80
70
VIN = 1.2V
60
VIN = 0.85V VIN = 1.5V
50
40
30
20
10
0
0.01
L1 = 47µH
SUMIDA CD43-470
FB = GND
0.1
1
10
LOAD CURRENT (mA)
100 200
EFFICIENCY vs. LOAD CURRENT
(VOUT = 5.0V, L1 = SUMIDA 47µH)
100
90
VIN = 4.5V
80
VIN = 3.0V
70
VIN = 2.0V
60
VIN = 1.2V
50
VIN = 0.85V
40
30
20
10
0
0.01
L1 = 47µH
SUMIDA CD43-470
R1 = 619k, R2 = 200k
0.1
1
10
LOAD CURRENT (mA)
100 200
EFFICIENCY vs. LOAD CURRENT
(VOUT = 2.4V, L1 = TDK 47µH)
100
90
VIN = 2.0V
VIN = 1.5V
80
70
60
VIN = 1.2V
50
40
VIN = 0.85V
30
20
10
0
0.01
L1 = 47µH
TDK NLC453232T-470K
R1 = 200k, R2 = 200k
0.1
1
10
LOAD CURRENT (mA)
100 200
EFFICIENCY vs. LOAD CURRENT
(VOUT = 3.3V, L1 = TDK 47µH)
100
90
VIN = 2.5V
80
VIN = 1.5V
VIN = 2.0V
70
60
VIN = 1.2V
50
VIN = 0.85V
40
30
20
10
0
0.01
L1 = 47µH
TDK NLC453232T-470K
FB = GND
0.1
1
10
LOAD CURRENT (mA)
100 200
EFFICIENCY vs. LOAD CURRENT
(VOUT = 5.0V, L1 = TDK 47µH)
100
90
VIN = 4.5V
VIN = 3.0V
80
70
60
VIN = 2.0V
50
VIN = 1.2V
40
VIN = 0.85V
30
20
10
0
0.01
L1 = 47µH
TDK NLC453232-470K
R1 = 619k, R2 = 200k
0.1
1
10
LOAD CURRENT (mA)
100 200
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