Low Power-Loss Voltage Regulators
Fig.1 Test Circuit
VIN
1
3
0.33µF
2
5
A Iq
VC
A IC
PQxxxEZ02Z Series
+
47µF
VO
A IO
V
RL
Fig.2 Test Circuit for Ripple Rejection
ei ~
VIN
1
3
0.33µF
VC
2
5
2.7V
Fig.3 Power Dissipation vs. Ambient
Temperature
10
PD : With infinite heat sink
8
5
+
47µF
+
IO
eo
V~
RL
f=120Hz (sine wave)
ei(rms)=0.5V
VIN=VO(TYP)+2V
IO=0.3A
RR=20log (ei(rms)/eo(rms))
0
−40 −20 0 20 40 60 80
Ambient temperature Ta (˚C)
Note) Oblique line portion:Overheat protection may operate in this area.