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參數(shù)資料
| 型號(hào)： | PM6652TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, QCC32 |
| 封裝： | 5 X 5 MM, 1 MM HEIGHT, 0.50 MM PITCH, ROHS COMPLIANT, VFQFPN-32 |
| 文件頁(yè)數(shù)： | 41/53頁(yè) |
| 文件大小： | 2519K |
| 代理商： | PM6652TR |
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Application ideas
PM6652
46/53
Doc ID 16867 Rev 3
9.2
Voltage regulation without droop
PM6652 can be suitable also for high current DC/DC conversion requiring high precision
load regulation and no load line function.
Figure 49.
No load-line output reference schematic
In Figure 49 the typical current sensing filter (R31, C15) has been modified by adding C60
and R32, in order to disable the load-line (or droop) function.
The switching regulator AC behavior is not affected by C60-R32 insertion if the following
design rules are followed:
●
C60<<C15
●
C15*R31=L1/RDCR
●
1/(2*
π*R32*C60)<<fsw
●
R32 value should fall in the range 1 k
Ω
÷ 10 kΩ, as suggested in Section 8.7: Current
With the modified current sensing filter the output voltage load regulation is almost
independent of the output load, taking full advantage of the differential remote feedback. In
fact Equation 9 now becomes:
Equation 34
Previous result shows that the DC sensed current is zero; as a consequence, the DC output
voltage is given by:
C15
C60
SVCC
CPU VCCIO
PCH CORE
R2
SVCC
R5
COREON
R8
VIN
PGOOD
DPRSLPVR
C30
+
C17
VID6
C11
C3
VID5
C9
R31
L1
+5V
VID4
VID3
R10
Q1
5
4
1
6
2 3
7 8
VID2
C5
C6
R3
3V3
VID1
VID0
C8
Q3
5
4
1
6
2 3
7 8
VIN
R32
+
C13
C2
SVCC
U1
PM6652
VRTT#
1
THERM
2
GSNS
3
VSNS
4
CSNS
5
VOUT
6
COMP
7
SVCC
8
SGN
D
9
VD
AC
10
IMO
N
11
IMO
N
FB
12
SST
A
R
T
13
IL
IM
14
OSC
15
PW
R
G
D
16
DPRSLPVR
17
PGND
18
LGATE
19
PVCC
20
CLKEN#
21
BOOT
22
HGATE
23
PHASE
24
CO
RE
O
N
25
VI
D
0
26
VI
D
1
27
VI
D
2
28
VI
D
3
29
VI
D
4
30
VI
D
5
31
VI
D
6
32
thermal
33
+
C18
()
s
R
C
1
s
R
C
s
1
R
sL
1
s
i
R
V
C
32
60
31
15
DCR
1
L
DCR
OUT
SNS
+
+
=
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| PM6670ASTR | 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 Complete DDR2/3 Mem Pwr supply controllr RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| PM6670ATR | 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 Complete DDR2/3 Mem Pwr supply controllr RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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