Low Power-Loss Voltage Regulators
Fig.1 Test Circuit
V
IN
1
PQxxxEZ5MZ Series/PQxxxEZ01Z Series
3
V
O
A
2
5
0.33µF
A
I
q
V
C
A
I
C
+
47µF
I
O
V
R
L
Fig.2 Test Circuit for Ripple Rejection
+
1
ei
~
2
0.33µF
V
IN
5
2.7V
V
C
+
47µF
R
L
3
I
O
eo
V
~
f=120Hz (sine wave)
ei(rms)=0.5V
V
IN
=V
O
(TYP)+2V
I
O
=0.3A
RR=20log (ei(rms)/eo(rms))
Fig.3 Power Dissipation vs. Ambient
Temperature
10
P
D
: With infinite heat sink
Fig.4 Overcurrent Protection
Characteristics (PQ015EZ5MZ)
1.5
V
IN
=2.35V
V
IN
=3V
V
IN
=3.3V
V
IN
=2.5V
8
Power dissipation P
D
(W)
1.2
Output voltage V
O
(V)
0.9
5
0.6
V
IN
=5V
0.3
0
−40
−20
0
0
20
40
60
80
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2
Output current I
O
(A)
Ambient temperature T
a
(°C)
Note) Oblique line portion:Overheat protection may operate in this area.