Low Power-Loss Voltage Regulators
Fig.17 Circuit Operating Current vs. Input
Voltage (PQ20WZ11)
30
25
20
15
R
L
=6.6Ω
10
5
0
R
L
=∞Ω
Circuit operating current I
BIAS
(mA)
PQ20WZ51/PQ20WZ11
Vc=2.7V,
R
1
=2kΩ, R
2
=500Ω
(Vo=3.3V)
R
L
=3.3Ω
0
1
2
3
4
5
6
Input voltage V
IN
(V)
7
8
Fig.18 Power Dissipation vs. Ambient
Temperature
3
Power dissipation P
D
(W)
Cu area 740mm
2
Cu area 180mm
2
Cu area 100mm
2
Cu area 70mm
2
Cu area 36mm
2
2
PWB
PWB
Cu
1
0
–20
Material
: Glass-cloth epoxy resin
Size
: 50 X 50 X 1.6mm
Cu thickness : 35µm
0
20
40
60
80
Ambient temperature T
a
(˚C)
100
s
Typical Application
DC input
Cin
1
3
V
O
R
2
2
V
IN
5
4
C
O
+
R
1
2kΩ
Load
ON/OFF signal
High : Output ON
Low or Open : Output OFF
s
Model Line-ups for Tape-packaged Products
Output current
0.5A output
1.0A output
Sleeve-packaged products Tape-packaged products
High-precision output type High-precision output type
PQ20WZ51
PQ20WZ5U
PQ20WZ11
PQ20WZ1U
SHARP [ SHARP ELECTRIONIC COMPONENTS ]
