Low Power-Loss Voltage Regulators
Fig.1 Test Circuit
PQ05RF1/PQ05RF11series
V
IN
1
2
4
3
0.33µF
V
C
47µF
V
O
V
IN
1
PQ05RF1Vseries
2
4
3
0.33µF
47µF
+
PQ05RF1 Series
3.3µF
+
V
O
A
+
I
O
A
R
L
I
O
A
I
q
I
C
V
R
L
V
A
A
I
q
Fig.2 Test Circuit of Ripple Rejection
PQ05RF1/PQ05RF11series
1
e
i
3
V
IN
0.33µF
47µF
2
4
+
+
PQ05RF1Vseries
1
e
i
R
L
V
e
O
f=120Hz(sine wave)
e
i(rms)
=0.5V
RR=20 log(e
i(rms)
/e
o(rms)
)
V
IN
0.33µF
3
47µF
2
4
+
3.3µF
+
+
R
L
V
e
O
f=120Hz(sine wave)
e
i(rms)
=0.5V
RR=20 log(e
i(rms)
/e
o(rms)
)
Fig.3 Power Dissipation vs. Ambient
Temperature
20
P
D
1 :No heat sink
P
D
2 :With infinite heat sink
Fig.4 Overcurrent Protection
Characteristics (Typical Value)
100
80
60
40
20
0
Power dissipation P
D
(W)
15
P
D2
10
5
P
D1
0
50
100
150
Ambient temperature T
a
(˚C)
Oblique line portion : Overheat protection may operate in this area.
0
–25
Relative output voltage (%)
0
0.5
1.0
1.5
Output current I
O
(A)
2.0
Note)
Fig.5 Output Voltage Minute Adjustment
Characteristics (PQ05RF1V)
6.0
R
1
=390Ω
R
1
=1kΩ
Output voltage V
O
(V)
Fig.6 Output Voltage Minute Adjustment
Characteristics (PQ09RF1V)
R
1
=390Ω
R
1
=1kΩ
5.5
R
1
=
3.9kΩ
Output voltage V
O
(V)
9.9
R
1
=3.9kΩ
5.0
9.0
4.5
8.1
10
2
10
3
R
2
(Ω)
10
4
10
3
10
4
R
2
(Ω)
10
5
SHARP [ SHARP ELECTRIONIC COMPONENTS ]
