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MAX1817 Datasheet(PDF) 5 Page - Maxim Integrated Products

Part # MAX1817
Description  Compact, High-Efficiency, Dual-Output Step-Up DC-DC Converter
PDF  12 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1817 Datasheet(HTML) 5 Page - Maxim Integrated Products

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Compact, High-Efficiency, Dual-Output
Step-Up DC-DC Converter
_______________________________________________________________________________________
5
0.1
10
1
100
1000
MAIN OUTPUT EFFICIENCY
vs. LOAD CURRENT
LOAD CURRENT (mA)
95
70
75
85
90
80
A: VIN = 3.3V,
VOUT = 5V
B: VIN = 2.4V,
VOUT = 5V
C: VIN = 2.4V,
VOUT = 3.3V
D: VIN = 1.8V,
VOUT = 5V
E: VIN = 1.8V,
VOUT = 3.3V
CIRCUIT OF FIGURE 2
75
25
0.01
0.1
1
10
100
LCD OUTPUT EFFICIENCY
vs. LOAD CURRENT
35
LOAD CURRENT (mA)
45
55
65
60
50
40
30
70
A: VIN = +2.4V, VLCD = 12V
B: VIN = +2.4V, VLCD = 18V
C: VIN = +2.4V, VLCD = 24V
D: VIN = +1.8V, VLCD = 12V
E: VIN = +1.8V, VLCD = 18V
F: VIN = +1.8V, VLCD = 24V
VOUT = 3.3V,
NO LOAD
A
B
C
D
E
F
0
40
20
80
60
140
120
100
160
1.0
1.2
1.1
1.3
1.4
1.5
1.6
1.7
STARTUP VOLTAGE vs. LOAD CURRENT
STARTUP VOLTAGE (V)
RESISTIVE LOAD
LCD OFF
0
4
2
10
8
6
16
14
12
18
1.0
2.0
1.5
2.5
3.0
3.5
4.0
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE (LCD OFF)
INPUT VOLTAGE (V)
0
100
50
250
200
150
400
350
300
450
02
1
3456
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
VOUT = 3.3V
VLCD = 18V, NO LOAD
R1 = 1M
Ω, R2 = 75kΩ
10
µs/div
MAIN CONVERTER
SWITCHING WAVEFORM
MAX1817-06
A: ILX, 500mA/div
B: VOUT, 50mV/div, AC-COUPLED
C: VLX, 5V/div
VIN = 2.4V, VOUT = 3.3V, ILOAD,OUT = 50mA, VONLCD = 0
0
A
B
C
0
4
µs/div
LCD CONVERTER
SWITCHING WAVEFORM
MAX1817-07
A: ILXLCD, 500mA/div
B: VLCD, 100mV/div, AC-COUPLED
C: VLXLCD, 10V/div
VIN = 2.4V, VOUT = 3.3V, ILOAD,OUT = 0,
VLCD = 18V, ILOAD,LCD = 5mA
0
A
B
C
0
Typical Operating Characteristics
(Circuit of Figure 3, TA = +25°C, unless otherwise noted.)



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