Low Power-Loss Voltage Regulators
Fig. 1 Test Circuit
PQ1R30 Series
Fig. 2 Test Circuit of Ripple Rejection
+
6
4
6
4
A
1
I
q,
I
qs
1µF
+
A
V
IN
I
c(
ON
)
3
2
5
10µF
+
A
I
O
V
O
e
i
V
IN
1µF
+
1
2
5
3
10µF
+
V
R
L
0.1µF
0.1µF
R
L
V
e
o
V
c
V
c
f
=400Hz(sine wave)
e
i(rms)
=100mV
V
IN
=Vo(TYP)+1.0V
I
o
=10mA
RR=20 log(e
i(rms)
/e
o(rms)
)
Fig. 3 Power Dissipation vs. Ambient
Temperature
500
Fig. 4 Overcurrent Protection Characteristics
(Typical Value)
100
Relative output voltage (%)
Power dissipation P
D
(mW)
400
P
D
80
60
40
20
0
300
200
100
0
–20 0
50
80 100
150
Ambient temperature T
a
(˚C)
Note) Oblique line portion : Overheat protection may operate in this area.
0.1
0.2
0.3
0.4
Output current I
O
(A)
Note) Oblique line portion : Overheat protection may operate in this area.
0
Fig. 5 Output Voltage Deviation vs. Junction
Temperature (PQ1R30) (Typical Value)
80
Fig. 6 Output Voltage vs. Input Voltage
(PQ1R30) (Typical Value)
4.0
C
IN
=1µF
C
O
=10µF
Output voltage deviation
∆V
O
(mV)
60
40
20
0
–20
–40
–60
Output voltage Vo(V)
V
IN
=4.0V
I
O
=10mA
V
C
=1.8V
C
O
=10µF
3.0
R
L
=∞
R
L
=40Ω
2.0
R
L
=20Ω
1.0
–80
–40 –20 0 20 40 60 80 100 120 140
Junction temperature Tj (˚C)
0
0
1.0
2.0
3.0
4.0
5.0
Input voltage V
IN
(V)
6.0
SHARP [ SHARP ELECTRIONIC COMPONENTS ]
