參數(shù)資料
型號(hào): EL7584IRZ-T13
廠商: INTERSIL CORP
元件分類: 穩(wěn)壓器
英文描述: 4-Channel DC:DC Converter
中文描述: 1.75 A SWITCHING REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO24
封裝: LEAD FREE, MO-153, TSSOP-24
文件頁(yè)數(shù): 11/16頁(yè)
文件大?。?/td> 860K
代理商: EL7584IRZ-T13
-
+
+
-
OSC
-
+
R
21
R
22
V
REF
3.3μF
0.1μF
5V TO
17V
V
DDN
DRVN
V
SSN
V
DDP
DRVP
V
SSP
FBP
FBN
V
FBP
R
11
R
12
2.2μF
0.1μF
5V TO
17V
V
OFF
V
ON
R
ON
IS 30 - 40
FOR V
DD
6V TO 12V
R
ONP
R
ONN
R
ONP
R
ONN
C
OUT2
C
CPN
C
CPP
C
OUT1
11
FN7317.2
February 4, 2005
Single Stage Charge Pump
Positive Charge Pump Design Considerations
A single stage charge pump is shown above. The maximum
V
ON
output voltage is determined by the following equation:
V
ON
max
(
)
2
V
DDCPP
- I
OUT
2
R
ONN
(
R
ONP
)
- 2
V
DIODE
- I
OUT
0.5
F
S
C
CPP
-------------------------------------------
×
×
+
×
×
×
- I
OUT
0.5
F
S
C
OUT1
-----------------------------------------------
×
where:
R
ONN
and R
ONP
resistance values depend on the V
DDP
voltage levels. For 12V supply, R
ON
is typically 33
. For
6V supply, R
ON
is typically 45
.
If additional stage is required, the LX switching signal is
recommended to drive the additional charge pump diodes.
The drive impedance at the LX switching is typically 150m
.
The figure below illustrates an implementation for two-stage
positive charge pump circuit.
EL7584
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