ADP1148 데이터 시트보기 (PDF) - Analog Devices
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ADP1148 Datasheet PDF : 16 Pages
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Typical Performance Characteristics–ADP1148, ADP1148-3.3, ADP1148-5
200
150
100
50
0
0
1
2
3
4
5
MAXIMUM OUTPUT CURRENT – A
Figure 3. Selecting RSENSE vs. Maxi-
mum Output Current
1000
800
VSENSE = VOUT = 5V
600
400
VIN = 7V
200
VIN = 12V
VIN = 10V
0
0
100
200
300
FREQUENCY – kHz
Figure 4. Operating Frequency vs.
Timing Capacitor Value
1000
800
600
L = 50H
RSENSE = 0.02⍀
L = 25H
RSENSE = 0.02⍀
400
L = 50H
200
RSENSE = 0.05⍀
0
0
1
2
3
4
5
(VIN–VOUT) VOLTAGE – V
Figure 5. Selecting Minimum Output
Capacitor vs. (VIN–VOUT) and Inductor
100
I 2R
GATE CHARGE
95
IQ
90
85
80
0.01 0.03
0.1
0.3
1.0
3.0
OUTPUT CURRENT – A
Figure 6. Typical Efficiency Losses
100
98
96
94
ILOAD = 1A
92
90
ILOAD = 100mA
88
86
84
82
FIGURE 1 CIRCUIT
80
0
4
8
12
16
20
INPUT VOLTAGE – V
Figure 7. Efficiency vs. Input Voltage
+40
+20
0
ILOAD = 0.1A
–20
ILOAD = 1A
–40
FIGURE 1 CIRCUIT
–60
0 4 6 8 10 12 14 16
VIN
Figure 8. ADP1148-5 Output Voltage
Change vs. Input Voltage
60
FIGURE 1 CIRCUIT
40
20
VIN = 6V
0
–20
VIN = 12V
–40
–60
0
0.5
1.0
1.5
2.0
2.5
LOAD CURRENT – A
Figure 9. Load Regulation
1.6
1.4
ACTIVE MODE
1.2
1.0
0.8
0.6
0.4
SLEEP MODE
0.2
0.0
4 6 8 10 12 14 16 18 20
INPUT VOLTAGE – V
Figure 10. DC Supply Current
30
25
20
VSHUTDOWN = 2V
15
10
5
0
4 6 8 10 12 14 16 18 20
INPUT VOLTAGE – V
Figure 11. Supply Current in Shutdown
REV. A
–5–
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