Low Power-Loss Voltage Regulators
Fig.15 Output Peak Current vs. Dropout
Voltage (PQ20VZ51)
1.7 Tj=25˚C
1.6
1.5
1.4
1.3
1.2
IOP:Output current when
1.1
output voltage is 95%
in comparison with
1
the initial value
0 1 2 3 4 5 6 7 8 9 10
Dropout voltage Vi–O (V)
Fig.17 Output Peak Current vs. Junction
Temperature (PQ20VZ51)
1.5
VIN–VO=2V
1.4
1.3
1V
1.2
1.1
0.5V
1.0 IOP:Output current when
output voltage is 95%
0.9 in comparison with
the initial value
–20 0 25 50 75 100 125
Junction temperature Tj (˚C)
Fig.19 Power Dissipation vs. Ambient
Temperature
3
Cu area 740mm2
2
Cu area 180mm2
Cu area 100mm2
1 Cu area 70mm2
Cu area 36mm2
0
–20 0 20 40 60 80 100
Ambient temperature Ta (˚C)
PQ20VZ51/PQ20VZ11
Fig.16 Output Peak Current vs. Dropout
Voltage (PQ20VZ11)
2.5
2.4 Tj=25˚C
2.3
2.2
2.1
2.0
1.9
1.8
IOP:Output current when
output voltage is 95%
1.7
in comparison with
1.6
the initial value
0 1 2 3 4 5 6 7 8 9 10
Dropout voltage Vi–O (V)
Fig.18 Output Peak Current vs. Junction
Temperature (PQ20VZ11)
VIN–VO=2V
2.0
1V
0.5V
1.5 IOP:Output current when
output voltage is 95%
in comparison with
the initial value
–20 0 25 50 75 100 125
Junction temperature Tj (˚C)
PWB
PWB
Cu
Material : Glass-cloth epoxy resin
Size
: 50×50×1.6mm
Cu thickness : 35µm