Low Power-Loss Voltage Regulators
PQ20WZ51/PQ20WZ11
ꢀꢀꢀElectrical Characteristics
Parameter
Input voltage
Output voltage
Load regulation
Line regulation
Ripple rejection
Reference voltage
Temperature coefficient of Reference voltage
Dropout voltage
ꢀ
(Unless otherwise specified, conditions shall be VIN=5V, V
o
=3.3V,ꢀ4,R
MIN.
3.5
3.0
––
––
45
2.574
––
––
––
2.0
––
––
––
1
=2kΩ, R
TYP.
––
––
––
––
60
2.64
±1.0
––
––
––
––
––
––
––
2
=500Ω, V
c
=2.7V, T =25˚C)
a
Symbol
Conditions
MAX.
24
20
2.0
2.5
––
2.706
––
0.5
8
––
200
0.8
2.0
5.0
Unit
V
V
%
%
dB
V
%
V
mA
V
––
V
IN
––
Vo
ꢀ5
RegL
V
IN=4 to 10V, Io=5mA
RegI
Refer to Fig. 2
ꢀ4
RR
Vref
Tj=0 to 125˚C, Io=5mA
VcVref
ꢀ4, 6
Vi-o
Io=0A
Quiescent current
Iq
ꢀ7 ON-state voltage for control
ON-state current for control
OFF-state voltage for control
OFF-state current for control
Output OFF-state consumption current
Vc(ON)
––
––
Ic(ON
Vc(OFF
Ic(OFF
)
)
)
µA
V
µA
µA
Io=0A
Io=0A, Vc=0.4V
Io=0A, Vc=0.4V
Iqs
––
ꢀ4
PQ20WZ51:Io=0.3A, PQ20WZ11:Io=0.5A
ꢀ5
PQ20WZ51:Io=5mA to 0.5A, PQ20WZ11:Io=5mA to 1.0A
ꢀ6 Input voltage shall be the value when output voltage is 95% in comparison with the initial value.
ꢀ7 In case of opening control terminal , output voltage turns off.
2
Fig. 1 Test Circuit
Fig. 2 Test Circuit for Ripple Rejection
0.33µF
0.33µF
VIN
47µF
VO
3
3
1
1
R
R
2
R2
I
O
IO
A
V
ref
ei
47µF
4
+
4
+
V
C
2
2
eo
5
5
V
V
1
R1
2kΩ
A
VIN
R
L
RL
I
C
V
VC
A
I
q
2kΩ
2.7V
f=120Hz(sine wave)
i(rms)=0.5V
IO=0.3A
R
R
VO=Vref X
1+ –––2––
e
1
RR=20 log(ei(rms)/eo(rms)
)
[R1=2kΩ,Vref Nearly =2.64V]
VIN=5V
VO=3.3V(R1=2kΩ)
Fig. 3 Power Dissipation vs. Ambient
Temperature
Fig. 4 Overcurrent Protection
Characteristics (Typical Value)
(PQ20WZ51)
10
4
PD:With infinite heat sink
VO=3.3V
PD
8
5
3
2
V
i
–O =0.5V
–O =1V
–O =2V
V
V
V
i
i
i
–O =3V
1
0
0
–20
0
50
80 100
150
0
0.5
1.0
1.5
2.0
Ambient temperature T
a
(˚C)
Output current I
O
(A)
Note) Oblique line portion : Overheat protection may operate in this area.
SHARP [ SHARP ELECTRIONIC COMPONENTS ]
