參數(shù)資料
型號(hào)： PQ30RV31
廠商： Sharp Corporation
英文描述： Variable Output Low Power-Loss Voltage Regulator
中文描述： 可變輸出低功率損耗的電壓調(diào)節(jié)器
文件頁(yè)數(shù)： 4/4頁(yè)
文件大小： 34K
代理商： PQ30RV31
Low Power-Loss Voltage Regulators
PQ30RV31
I
ON/OFF Operation
Fig.8 Ripple Rejection vs. Input Ripple
Frequency
7
-25
100
75
50
25
0
4
4.5
5
5.5
6
6.5
V
IN
=15V,R
1
=390
,R
2
=2.7k
O
O
(
Dropout voltage V
i
-O
(V)
V
C
High:Output OFF
Low :Output ON
G
2
G
3
G
1
G
4
D
2
R
3
R
1
R
2
C
O
+
V
O
R
L
V
ADJ
D
1
C
IN
V
IN
R
1
Equivalent Circuit
in OFF-state
R
2
R
L
D
2
V
O
’
V
ADJ
R
D
ON/OFF operation is available by mounting externally D
2
and R
3
.
When V
ADJ
is forcibly raised above V
REF
(1.25V TYP) by applying the external signal, the output is turned off (pass transistor of
regulator is turned off. When the output is OFF, V
ADJ
must be higher then V
REF
MAX., and at the same time must be lower than
maximum rating 7V.
In OFF-state, the load current flows to R
L
from V
ADJ
through R
2
. Therefore the value of R
2
must be as high as possible.
V
O
'=V
ADJ
X
R
L
/ (R
L
+R
2
)
occurs at the load. OFF-state equivalent circuit R
1
up to 10k
is allowed. Select as high value of R
L
and R
2
as possible in this range.
In some case, as output voltage is getting lower (V
O
<1V), impedance of load resistance rises. In such condition, it is sometime
impossible to obtain the minimum value of V
O
'. So add the dummy resistance indicated by R
D
in the figure to the circuit parallel to
the load.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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