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參數資料
| 型號： | ADP3166 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 5-Bit Programmable 2-, 3-, 4-Phase Synchronous Buck Controller |
| 中文描述： | 5位可編程2 - ，3 - ，4相同步降壓控制器 |
| 文件頁數： | 16/20頁 |
| 文件大小： | 351K |
| 代理商： | ADP3166 |
REV. 0
–16–
ADP3166
The first step is to compute the time constants for all of the poles and zeros in the system:
R = n
R
+ A
R
+R
V
V
+
R + R
n
.
1. V
L
R
(
1. m + . m
– n
R
OD
3 6 56
D
V
V
C
V
R =
+
+
1. m
+
nH
1– .
1. m
OD
D
DS
L
RT
VID
OD
RT
X
O
VID
×
×
×
(
)
×
×
×
×
×
1 9
.
(
)
×
×
×
×
)
×
×
×
(
×
)
×
1. V
1
3 1. m
5 4. m
0 48
600
1. m
0
.
V
mF
R =
48
36. m
×
(25)
T = C
R
– R +
L
R
R
– R
R
T = 6.56 mF
1.9 m – 0.6 m
+375 pH
1.5 m
1.9 m – 0.6 m
1.5 m
T = 8.70 s
(
1.
X
OD
X
OD
OD
'
X
×
(
×
×
(
)
×
(26)
T = R + R – R
C
T =
+ . m
0 6
– . m
1 9
mF =1 31
s
OD
X
)
×
)
×
μ
6.
m
(27)
T =
V
L –A
R
f
SW
2
V
R
T =
.
V
nH –
kHz
.
=5 05
s
RT
D
DS
VID
1 5
e
×
×
×
×
×
×
μ
0 48
600
5 4. m
2 330
36. m
V
(28)
T =
C
C
R
C
R – R +C
6 56
1. m
R
T =
.
(
mF
mF
.
m
.
mF
– . m
0 6
+
mF
1. m
=
7 ns
X
Z
OD
X
Z
OD
×
×
×
(
×
×
×
×
)
×
2
2
50
1 9
6 56
50
13
(29)
C
=T
R
=
ns
k
.
=
18. pF
FB
d
A
137
7 33
(33)
Choosing the closest standard values for these components yields:
C
A
= 680 pF,
R
A
= 7.32 k
,
C
B
= 680 pF, and
C
FB
= 18 pF.
Figure 3 shows the typical transient response using the compen-
sation values.
C
IN
Selection and Input Current di/dt Reduction
In continuous inductor-current mode, the source current of the
high-side MOSFET is approximately a square wave with a duty
ratio equal to n V
OUT
/V
IN
and an amplitude one-nth of the
maximum output current. To prevent large voltage transients, a
low ESR input capacitor sized for the maximum rms current
must be used. The maximum rms capacitor current is given by
I
= D
I
n
D–
I
=
A
.
–
=9 05
A
CRMS
O
CRMS
×
×
×
×
×
×
1
1
0 125
.
56
1
3
125
1
(34)
Note that the capacitor manufacturer’s ripple current ratings are
often based on only 2,000 hours of life. This makes it advisable
where, for the ADP3166,
R'
is the PCB resistance from the bulk
capacitors to the ceramics and where
R
DS
is the total low-side
MOSFET on resistance per phase. For this example,
A
D
is 5,
V
RT
equals 0.48 V,
R'
is approximately 0.6 m
(assuming a 4-layer
motherboard), and
L
X
is 375 pH for the eight OSCON capacitors.
A type-three compensator on the voltage feedback is adequate for
proper compensation of the output filter. The expressions that
follow are intended to yield an optimal starting point for the design;
some adjustments may be necessary to account for PCB and com-
ponent parasitic effects (see the Tuning Procedure section).
The compensation values can then be solved using the following:
C =n
R
T
R
R
C =
36. m
.
s
.
k
=
pF
OD
×
a
e
B
×
×
×
2 00
μ
×
3 1. m
8 70
689
(30)
C =T
R
=
.
s
.
k
=
pF
b
B
1 31
2 00
655
μ
(31)
C =T
R
=
.
s
.
k
=
pF
b
B
1 31
2 00
655
μ
(32)
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相關代理商/技術參數 |
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| ADP3166JRU-REEL | 功能描述:IC REG BUCK 5BIT 2-4PHAS 28TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - 專用型 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,000 系列:- 應用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數:10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應商設備封裝:42-WLP 包裝:帶卷 (TR) |
| ADP3166JRU-REEL7 | 功能描述:IC REG BUCK 5BIT 2-4PHAS 28TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - 專用型 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,000 系列:- 應用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數:10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應商設備封裝:42-WLP 包裝:帶卷 (TR) |
| ADP3166JRUZ-REEL | 功能描述:IC REG BUCK 5BIT 2-4PHAS 28TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 專用型 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,000 系列:- 應用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數:10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應商設備封裝:42-WLP 包裝:帶卷 (TR) |
| ADP3167 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ADP3160/ADP3167: 5-Bit Programmable 2-Phase Synchronous Buck Controller Data Sheet (Rev. B. 5/02) |
| ADP3167JR | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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