參數(shù)資料
型號： PQ30RV11
廠商： Sharp Corporation
英文描述： CAP ARRAY, 4 X 1000PF 50V 0612X7RCAP ARRAY, 4 X 1000PF 50V 0612X7R; Capacitance:1nF; Voltage rating, DC:50V; Capacitor dielectric type:Ceramic Multi-Layer; Series:W3A; Tolerance, +:20%; Tolerance, -:20%; Temp, op. max:125(degree C);
中文描述： 可變輸出低功率損耗的穩(wěn)壓器
文件頁數(shù)： 7/8頁
文件大?。?/td> 63K
代理商： PQ30RV11
Low Power-Loss Voltage Regulators
PQ30RV1/PQ30RV11/PQ30RV2/PQ30RV21
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 10
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.
I
ON/OFF Operation
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
I
An Example of ON/OFF Circuit Using the 1-chip Microcomputer Output Port (PQ30RV1)
<Specification>
Output port of microcomputer
V
OH
(max)
=
0.5 V
V
OH
(min)
=
2.4 V (I
OH
=
0.2mA)
MAX. rating of I
OH
=
0.5mA
Output should be set as follows.
15.6V R
L
=
52
(I
O
=
0.3A)
From V
O
=
1.25V (1+R
2
/R
1
) we get V
O
=
15.6V.
R
2
/R
1
=
11.48
Assuming that V
F
(max)
=
0.8V for D
2
in case of V
OH
(min)
=
2.4V, we get V
ADJ
=
V
OH
(min)-V
F
(max)
=
2.4V-0.8V
=
1.6V. From
V
ref
(max)
=
1.3V we get R
3
=
0
If R
1
=
10k
, we get R
2
=
11.48
X
R
1
=
114.8k
and I
OH
as follows, ingnoring R
L
(52
) :
I
OH
=
1.6V
X
(R
1
+R
2
) /R
1
X
R
2
=
1.6V
X
(10k
+114.8k
) /10k
X
114.8k
=
0.17mA
Hence, I
OH
<0.2mA. Therefore V
OH
(min)is ensured.
Next, assuming that V
F
(min)
=
0.5V for D
2
in case of V
OH
(max), we get:
I
OH
=
(5V-0.5V) (R
1
+R
2
) /R
1
X
R
2
=
0.49mA which is less than the rating.
Figure 1 shows the V
O
-V
C
characteristics when R
1
=
10k
, R
2
=
115k
, R
3
=
0
, V
IN
=
17V, R
L
=
52
, and D
1
=
1S2076A (Hitachi).
相關(guān)PDF資料
PDF描述
PQ30RV2 Variable Output Low Power-Loss Voltage Regulators
PQ30RV21 CAP ARRAY, 4 X 15NF 50V 0612X7RCAP ARRAY, 4 X 15NF 50V 0612X7R; CAPACITANCE:15NF; VOLTAGE RATING, DC:50V; CAPACITOR DIELECTRIC TYPE:CERAMIC MULTI-LAYER; SERIES:W3A; TOLERANCE, :10%; TOLERANCE, -:10%; TEMP, OP. MAX:125(DEGREE C); RoHS Compliant: Yes
PQ30RV31 Variable Output Low Power-Loss Voltage Regulator
PQ3DF53 3.3V Output, High Output Current (5A) Type Low Power-loss Voltage Regulator
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PQ30RV11J00F 制造商:Sharp Microelectronics Corporation 功能描述:
PQ30RV11J00H 功能描述:低壓差穩(wěn)壓器 - LDO PQ15RW11J00H RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
PQ30RV1B 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Positive Adjustable Voltage Regulator
PQ30RV2 制造商:SHARP 制造商全稱:Sharp Electrionic Components 功能描述:Low Power-Loss Voltage Regulators
PQ30RV21 制造商:Sharp Microelectronics Corporation 功能描述:LDO Regulator Pos 1.5V to 30V 2A 4-Pin(4+Tab) TO-220 制造商:Panasonic Industrial Company 功能描述:IC
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