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ADP1147AN-5 Arkusz danych(PDF) 4 Page - Analog Devices

Numer części ADP1147AN-5
Szczegółowy opis  High Efficiency Step-Down Switching Regulator Controllers
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ADP1147AN-5 Arkusz danych(HTML) 4 Page - Analog Devices

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ADP1147-3.3/ADP1147-5
–4–
REV. 0
–Performance Characteristics
MAXIMUM OUTPUT CURRENT – Amps
200
0
05
12
3
4
150
100
50
Figure 3. Selecting RSENSE vs.
Maximum Output Current
IOUT – Amps
100
95
80
10m
30m
3
0.1
0.3
1
90
85
I2R
GATE CHARGE
ADP1147 IQ
SCHOTTKY
DIODE
Figure 6. Typical Efficiency Losses
LOAD CURRENT – mA
5.11
5.10
5.02
0
400
2000
800
1200
1600
5.06
5.05
5.04
5.03
5.09
5.07
5.08
FIGURE 1 CIRCUIT
VIN = 6 VOLTS
VIN = 12 VOLTS
Figure 9. Load Regulation
FREQUENCY – kHz
1000
0
600
400
200
800
0
300
100
200
VSENSE = VOUT = +5V
VIN = +12V
VIN = +10V
VIN = +7V
Figure 4. Operating Frequency vs.
Timing Capacitor
INPUT VOLTAGE – Volts
100
95
70
58
20
11
14
17
90
85
80
75
FIGURE 1 CIRCUIT
1 AMP
0.1 AMP
Figure 7. Efficiency vs. Input Voltage
INPUT VOLTAGE – Volts
1.6
0
46
20
8
10121416
18
1.4
0.8
0.6
0.4
0.2
1.2
1.0
ACTIVE MODE
SLEEP MODE
Figure 10. DC Supply Current
(VIN – VOUT) VOLTAGE – Volts
1000
800
0
05
1
234
600
400
200
L = 50 H
RSENSE = 0.02
L = 25 H
RSENSE = 0.02
L = 50 H
RSENSE = 0.05
Figure 5. Selecting Minimum Output
Capacitor vs. (VIN – VOUT) and Inductor
INPUT VOLTAGE – V
5.11
5.10
5.03
48
16
12
5.07
5.06
5.04
5.05
5.09
5.08
100mA
1 AMP
300mA
FIGURE 1 CIRCUIT
Figure 8. ADP1147-5 Output Voltage
vs. Input Voltage
INPUT VOLTAGE – Volts
40
0
46
20
8
101214
1618
35
20
15
10
5
30
25
VSHUTDOWN = +2V
Figure 11. Supply Current in
Shutdown


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