ADP1147AR-3.3 查看數據表（PDF） - Analog Devices
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ADP1147AR-3.3 Datasheet PDF : 12 Pages
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ADP1147-3.3/ADP1147-5–Performance Characteristics
200
1000
1000
VSENSE = VOUT = +5V
L = 50H
RSENSE = 0.02⍀
800
800
150
L = 25H
RSENSE = 0.02⍀
600
600
100
VIN = +12V
400
400
L = 50H
50
200
VIN = +7V
VIN = +10V
RSENSE = 0.05⍀
200
0
0
1
2
3
4
5
MAXIMUM OUTPUT CURRENT – Amps
Figure 3. Selecting RSENSE vs.
Maximum Output Current
0
0
100
200
300
FREQUENCY – kHz
Figure 4. Operating Frequency vs.
Timing Capacitor
0
0
1
2
3
4
5
(VIN – VOUT) VOLTAGE – Volts
Figure 5. Selecting Minimum Output
Capacitor vs. (VIN – VOUT) and Inductor
100
GATE CHARGE
95
ADP1147 IQ
90
85
I2R
SCHOTTKY
DIODE
80
10m 30m
0.1
0.3
1
3
IOUT – Amps
Figure 6. Typical Efficiency Losses
5.11
FIGURE 1 CIRCUIT
5.10
5.09
5.08
5.07
VIN = 6 VOLTS
5.06
5.05
5.04
VIN = 12 VOLTS
5.03
5.02
0
400 800 1200 1600 2000
LOAD CURRENT – mA
Figure 9. Load Regulation
100
FIGURE 1 CIRCUIT
95
1 AMP
90
85
0.1 AMP
80
75
70
5
8
11
14
17
20
INPUT VOLTAGE – Volts
Figure 7. Efficiency vs. Input Voltage
5.11
FIGURE 1 CIRCUIT
5.10
5.09
100mA
5.08
5.07
5.06 300mA
5.05
5.04
1 AMP
5.03
4
8
12
16
INPUT VOLTAGE – V
Figure 8. ADP1147-5 Output Voltage
vs. Input Voltage
1.6
1.4
ACTIVE MODE
1.2
1.0
0.8
0.6
0.4
0.2
SLEEP MODE
0
4 6 8 10 12 14 16 18 20
INPUT VOLTAGE – Volts
Figure 10. DC Supply Current
40
35
VSHUTDOWN = +2V
30
25
20
15
10
5
0
4 6 8 10 12 14 16 18 20
INPUT VOLTAGE – Volts
Figure 11. Supply Current in
Shutdown
–4–
REV. 0
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