Low Power-Loss Voltage Regulators
PQ05RD21 Series/PQ3RD23
Fig.17 Circuit Operating Current vs. Input
Fig.18 Circuit Operating Current vs. Input
Voltage (PQ05RD21)
Voltage (PQ09RD21)
80
80
60
40
60
40
RL=2.5Ω
R
L
=4.5Ω
=9Ω
20
0
20
0
RL=5Ω
R
L
RL=∞Ω
RL
=∞Ω
0
5
10
0
5
10
15
Input voltage VIN (V)
Input voltage VIN (V)
Fig.19 Circuit Operating Current vs. Input
Fig.20 Dropout Voltage vs. Junction
Voltage (PQ12RD21)
Temperature
80
0.5
PQ12RD21
PQ3RD23
0.4
60
40
0.3
0.2
PQ09RD21
PQ05RD21
20
0.1
0
R
L
=6Ω
R
L
=12Ω
RL=∞Ω
0
0
5
10
15
20
25
–25
0
25
50
75
100 125
(˚C)
Input voltage VIN (V)
Junction temperature T
j
Fig.21 Quiescent Current vs. Junction
Fig.22 Ripple Rejection vs. Input Ripple
Frequency
Temperature
10
80
IO =0A
PQ3RD23(VIN=5V)
70
8
6
60
PQ12RD21(VIN=14V)
50
PQ09RD21(VIN=11V)
PQ12RD21
PQ05RD21
40
PQ09RD21
PQ05RD21(VIN=7V)
4
30
20
10
2
0
PQ3RD23
I
O
=0.5A, ei(rms)=0.5V
1
0
–25
0
25
50
75
100 125
(˚C)
0.1
10
100
Junction temperature T
j
Input ripple frequency f (kHz)
SHARP [ SHARP ELECTRIONIC COMPONENTS ]
