Low Power-Loss Voltage Regulators
Fig.5 Output Voltage Deviation vs.
Junction Temperature
20
VIN=5V
15 IO=2.5A
10
5
0
-5
-10
-15
-25
0 25 50 75 100 125
Junction temperature Tj (˚C)
Fig.7
Circuit Operating Current vs. Input
Voltage
Ta =25˚C
100
RL=0.66Ω
RL=1.32Ω
RL=∞
0
0
1
2
3
4
5
Input voltage VIN (V)
Fig.9 Quiescent Current vs. Junction
Temperature
20
VIN =5V
18 IO =0A
16
14
12
10
8
6
4
2
0
-25 0 25 50 75 100 125
Junction temperature Tj (˚C)
PQ3DF53
Fig.6 Output Voltage vs. Input Voltage
4
Ta =25˚C
3
RL=1.32Ω
RL=∞
RL=0.66Ω
2
1
0
0
1
2
3
4
5
Input voltage VIN (V)
Fig.8 Dropout Voltage vs. Junction
Temperature
0.5
VIN =Input voltage when output voltage is 95%
in comparison with the initial value
0.4 IO=5A
0.3
0.2
0.1
0
-25 0 25 50 75 100 125
Junction temperature Tj (˚C)
Fig.10 Ripple Rejection vs. Input Ripple
Frequency
100
80
60
40
VIN=5V
20 Io=0.5A
ei=0.5Vrms,
0 Ta =25˚C
0.1
1
10
100
Input ripple frequency f (kHz)