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ADP3168JRU-REEL Arkusz danych(PDF) 7 Page - Analog Devices

Numer części ADP3168JRU-REEL
Szczegółowy opis  6-Bit, Programmable 2-, 3-, 4-Phase Synchronous Buck Controller
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Strona internetowa  http://www.analog.com
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ADP3168JRU-REEL Arkusz danych(HTML) 7 Page - Analog Devices

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ADP3168
Rev. B | Page 7 of 24
TYPICAL PERFORMANCE CHARACTERISTICS AND TEST CIRCUITS
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
100
150
0
50
200
250
300
RT VALUE (kΩ)
SEE EQUATION 1 FOR FREQUENCIES NOT ON THIS GRAPH
Figure 3. Master Clock Frequency vs. RT
4.6
4.7
4.8
4.9
5.0
5.1
5.2
5.3
2.0
1.5
0.5
1.0
0
2.5
3.0
3.5
4.0
MASTER CLOCK FREQUENCY (MHz)
TA = 25°C
4-PHASE OPERATION
Figure 4. Supply Current vs. Master Clock Frequency
CSSUM
18
CSCOMP
17
28
VCC
CSREF
16
GND
19
39k
100nF
1k
1.0V
ADP3168
12V
VOS =
CSCOMP – 1V
40
Figure 5. Test Circuit 1, Current Sense Amplifier VOS
CSSUM
18
CSCOMP
17
28
VCC
CSREF
16
COMP
8 FB
9
GND
19
200k
10k
200k
1.0V
ADP3168
∆V
12V
100nF
∆V
FB = FB
∆V = 80mV – FB∆V = 0mV
Figure 6. Test Circuit, Positioning Voltage
+
250k
12V
1
µF
100nF
100nF
VCC
PWM1
PWM2
PWM3
PWM4
SW1
SW2
SW3
SW4
GND
CSCOMP
CSSUM
CSREF
ILIMIT
20k
ADP3168
VID4
VID3
VID2
VID1
VID0
VID5
FBRTN
FB
COMP
PWRGD
EN
DELAY
RT
RAMPADJ
1.25V
6-BIT CODE
250k
1k
4.7nF
1
2
3
4
8
10
12
14
5
6
7
9
11
13
28
27
26
21
24
23
22
17
18
19
15
16
20
25
Figure 7. Test Circuit 3, Closed-Loop Output Voltage Accuracy


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