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ADP1108AR-33 Datenblatt(PDF) 4 Page - Analog Devices

Teilenummer ADP1108AR-33
Bauteilbeschribung  Micropower DC-DC Converter Adjustable and Fixed 3.3 V, 5 V, 12 V
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Direct Link  http://www.analog.com
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ADP1108
–4–
REV. 0
–Typical Performance Characteristics
SWITCH CURRENT – Amps
1.2
0.6
0
0.1 0.2
1.2
0.3 0.4 0.5 0.6 0.7 0.8 0.9
1
1.1
1
0.8
0.4
0.2
VIN = 2.0V
VIN = 3.0V
VIN = 5.0V
Figure 1. Saturation Voltage vs. ISWITCH
Current in Step-Up Mode
RLIM – Ω
1000
900
1100
10
1k
800
700
600
500
400
300
200
100
VIN = 12V WITH L = 250µH @ VOUT = 5V
VIN = 24V WITH L = 500µH @ VOUT = 5V
100
Figure 4. Maximum Switch Current
vs. RLIM In Step-Down Mode
TEMPERATURE –
°C
22
21
13
–40
0
85
25
70
17
16
15
14
20
19
18
Figure 7. Oscillator Frequency vs.
Temperature
SWITCH CURRENT – Amps
1.6
0.6
0
0.15
0.75
0.25
0.35
0.45
0.55
0.65
1.4
0.8
0.4
0.2
1.2
1
VCE (SAT)
0.05
Figure 2. Switch ON Voltage vs.
Switch Current In Step-Down Mode
SWITCH CURRENT – mA
100
0
0
100
900
200 300 400
600 700 800
500
90
50
30
20
10
80
70
40
60
VIN = 2V
VIN = 5V
Figure 5. Supply Current vs. Switch
Current
TEMPERATURE –
°C
67
66
57
–40
0
85
25
70
61
60
59
58
65
64
63
62
Figure 8. Duty Cycle vs. Temperature
RLIM – Ω
1100
1000
100
10
100
1k
900
800
700
600
500
400
300
200
2V < VIN < 5V
Figure 3. Maximum Switch Current
vs. RLIM In Step-Up Mode
TEMPERATURE –
°C
120
110
40
–40
0
85
25
70
80
70
60
50
100
90
Figure 6. Quiescent Current vs.
Temperature
TEMPERATURE –
°C
35
34.5
30
–40
0
85
25
70
32
31.5
31
30.5
34
33.5
33
32.5
Figure 9. Switch ON Time vs.
Temperature


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