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MAX1678 Datasheet(PDF) 4 Page - Maxim Integrated Products

Part No. MAX1678
Description  1-Cell to 2-Cell, Low-Noise, High-Efficiency, Step-Up DC-DC Converter
Download  12 Pages
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX1678 Datasheet(HTML) 4 Page - Maxim Integrated Products

 
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1-Cell to 2-Cell, Low-Noise,
High-Efficiency, Step-Up DC-DC Converter
4
_______________________________________________________________________________________
Typical Operating Characteristics
(Circuit of Figure 7 (Fixed Mode, 3.3V) or Figure 8 (Adjustable Mode), TA = +25°C, unless otherwise noted.)
100
0
0.01
0.1
1
10
100 200
EFFICIENCY vs. LOAD CURRENT
(VOUT = 2.4V, L1 = 22µH)
20
LOAD CURRENT (mA)
40
60
80
90
70
50
30
10
VIN = 2.0V
VIN = 1.5V
L1 = 22
µH
SUMIDA CD43-220
R1 = 200k
Ω, R2 = 200kΩ
VIN = 1.2V
VIN = 0.85V
100
0
0.01
0.1
1
10
100 200
EFFICIENCY vs. LOAD CURRENT
(VOUT = 2.4V, L1 = SUMIDA 47µH)
20
LOAD CURRENT (mA)
40
60
80
90
70
50
30
10
VIN = 2.0V
VIN = 1.5V
L1 = 47
µH
SUMIDA CD43-470
R1 = 200k
Ω, R2 = 200kΩ
VIN = 1.2V
VIN = 0.85V
100
0
0.01
0.1
1
10
100 200
EFFICIENCY vs. LOAD CURRENT
(VOUT = 2.4V, L1 = TDK 47µH)
20
LOAD CURRENT (mA)
40
60
80
90
70
50
30
10
VIN = 2.0V
VIN = 1.5V
L1 = 47
µH
TDK NLC453232T-470K
R1 = 200k
Ω, R2 = 200kΩ
VIN = 1.2V
VIN = 0.85V
100
0
0.01
0.1
1
10
100 200
EFFICIENCY vs. LOAD CURRENT
(VOUT = 3.3V, L1 = 22µH)
20
LOAD CURRENT (mA)
40
60
80
90
70
50
30
10
VIN = 2.5V
VIN = 2.0V
L1 = 22
µH
SUMIDA CD43-220
FB = GND
VIN = 1.5V
VIN = 1.2V
VIN = 0.85V
100
0
0.01
0.1
1
10
100 200
EFFICIENCY vs. LOAD CURRENT
(VOUT = 5.0V, L1 = 22µH)
20
LOAD CURRENT (mA)
40
60
80
90
70
50
30
10
VIN = 4.5V
VIN = 2.0V
L1 = 22
µH
SUMIDA CD43-220
R1 = 619k
Ω, R2 = 200kΩ
VIN = 3.0V
VIN = 1.2V
VIN = 0.85V
100
0
0.01
0.1
1
10
100 200
EFFICIENCY vs. LOAD CURRENT
(VOUT = 3.3V, L1 = SUMIDA 47µH)
20
LOAD CURRENT (mA)
40
60
80
90
70
50
30
10
VIN = 2.5V
VIN = 2.0V
L1 = 47
µH
SUMIDA CD43-470
FB = GND
VIN = 1.5V
VIN = 1.2V
VIN = 0.85V
100
0
0.01
0.1
1
10
100 200
EFFICIENCY vs. LOAD CURRENT
(VOUT = 3.3V, L1 = TDK 47µH)
20
LOAD CURRENT (mA)
40
60
80
90
70
50
30
10
VIN = 2.5V
VIN = 2.0V
L1 = 47
µH
TDK NLC453232T-470K
FB = GND
VIN = 1.5V
VIN = 1.2V
VIN = 0.85V
100
0
0.01
0.1
1
10
100 200
EFFICIENCY vs. LOAD CURRENT
(VOUT = 5.0V, L1 = SUMIDA 47µH)
20
LOAD CURRENT (mA)
40
60
80
90
70
50
30
10
VIN = 4.5V
VIN = 3.0V
L1 = 47
µH
SUMIDA CD43-470
R1 = 619k
Ω, R2 = 200kΩ
VIN = 2.0V
VIN = 1.2V
VIN = 0.85V
100
0
0.01
0.1
1
10
100 200
EFFICIENCY vs. LOAD CURRENT
(VOUT = 5.0V, L1 = TDK 47µH)
20
LOAD CURRENT (mA)
40
60
80
90
70
50
30
10
VIN = 4.5V
VIN = 3.0V
L1 = 47
µH
TDK NLC453232-470K
R1 = 619k
Ω, R2 = 200kΩ
VIN = 2.0V
VIN = 1.2V
VIN = 0.85V


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