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ADP3168 Datasheet(PDF) 7 Page - Analog Devices

Part # ADP3168
Description  6-Bit, Programmable 2-, 3-, 4-Phase Synchronous Buck Controller
PDF  24 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADP3168 Datasheet(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
Ω
100nF
1k
Ω
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
Ω
10k
Ω
200k
Ω
1.0V
ADP3168
∆V
12V
100nF
∆V
FB = FB
∆V = 80mV – FB∆V = 0mV
Figure 6. Test Circuit, Positioning Voltage
+
250k
Ω
12V
1
µF
100nF
100nF
VCC
PWM1
PWM2
PWM3
PWM4
SW1
SW2
SW3
SW4
GND
CSCOMP
CSSUM
CSREF
ILIMIT
20k
Ω
ADP3168
VID4
VID3
VID2
VID1
VID0
VID5
FBRTN
FB
COMP
PWRGD
EN
DELAY
RT
RAMPADJ
1.25V
6-BIT CODE
250k
Ω
1k
Ω
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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