• Please refer to the chapter " Handling Precautions ".
Notice
In the absence of confirmation by device specification sheets,SHARP takes no responsibility for any defects that may occur in equipment using any SHARP
devices shown in catalogs,data books,etc.Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device.
Internet Internet address for Electronic Components Group http://sharp-world.com/ecg/
( 0.9 )
Reference voltage precision : ±2.5%
q
Built-in ON/OFF control function
q
Low dissipation current at OFF-state (Iqs : MAX. 5µA)
q
2.5 MIN.
0.5±
0.2
0.1
( 0.5 )
( 1.7 )
Low power-loss
(Dropout voltage : MAX. 0.5V)
q
Surface mount package (equivalent to SC-63)
q
Variable output voltage (3.0 to 20V)
q
Output current (0.5A :
PQ20WZ51)
(1.0A :
PQ20WZ11)
( 0.5 )
3
5.5
±
0.5
Model No.
Epoxy resin
Low Power-Loss Voltage Regulators
PQ20WZ51/PQ20WZ11
s
(Unless otherwise specified, conditions shall be V
IN
=5V, Vo=3.3V,
❇4
,R
1
=2kΩ, R
2
=500Ω, Vc=2.7V, T
a
=25˚C)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
––
Input voltage
24
––
V
V
IN
3.5
––
Output voltage
V
Vo
20
––
3.0
❇5
Load regulation
%
R
eg
L
2.0
––
––
V
IN
=4 to 10V, Io=5mA
Line regulation
R
eg
I
%
2.5
––
––
Refer to Fig. 2
Ripple rejection
RR
dB
––
60
45
❇4
Reference voltage
V
ref
V
2.706
2.64
2.574
T
j
=0 to 125˚C, Io=5mA
Temperature coefficient of Reference voltage VcV
ref
%
––
±1.0
––
❇4,
6
Dropout voltage
V
i
-o
V
0.5
––
––
Io=0A
Quiescent current
I
q
mA
8
––
––
❇7
ON-state voltage for control
––
Vc(
ON
)
V
––
––
2.0
––
ON-state current for control
Ic(
ON
)
µA
200
––
––
OFF-state voltage for control
Vc(
OFF
) Io=0A
V
0.8
––
––
OFF-state current for control
Io=0A, Vc=0.4V
Ic(
OFF
)
µA
2.0
––
––
Output OFF-state consumption current
Io=0A, Vc=0.4V
I
qs
µA
5.0
––
––
PQ20WZ51:Io=0.3A, PQ20WZ11:Io=0.5A
PQ20WZ51:Io=5mA
to 0.5A,
PQ20WZ11:Io=5mA
to 1.0A
Input voltage shall be the value when output voltage is 95% in comparison with the initial value.
In case of opening control terminal
2
, output voltage turns off.
Electrical Characteristics
❇4
❇5
❇6
❇7
Fig. 1 Test Circuit
V
IN
0.33µF
1
3
Fig. 2 Test Circuit for Ripple Rejection
47µF
R
2
V
ref
R
1
V
V
O
A
I
O
0.33µF
1
3
R
2
ei
V
IN
2
5
4
V
C
2
5
4
+
R
L
47µF
R
1
2kΩ
I
O
+
R
L
V
V
eo
A
I
C
A
I
q
2kΩ
V
C
2.7V
R
2
V
O
=V
ref
X 1+ –––––
R
1
[R
1
=2kΩ,Vref Nearly =2.64V]
f=120Hz(sine wave)
e
i(rms)
=0.5V
I
O
=0.3A
RR=20 log(e
i(rms)
/e
o(rms)
)
V
IN
=5V
V
O
=3.3V(R
1
=2kΩ)
Fig. 3 Power Dissipation vs. Ambient
Temperature
10
8
P
D
P
D
:With infinite heat sink
Fig. 4 Overcurrent Protection
Characteristics (Typical Value)
(PQ20WZ51)
4
V
O
=3.3V
Power dissipation P
D
(W)
Output voltage V
O
(V)
3
5
2
V
i
–O
=0.5V
V
i
–O
=1V
V
i
–O
=2V
V
i
–O
=3V
1
50
80 100
150
0
Ambient temperature T
a
(˚C)
Note) Oblique line portion : Overheat protection may operate in this area.
0
–20
0
0
0.5
1.0
1.5
Output current I
O
(A)
2.0
Low Power-Loss Voltage Regulators
Fig. 5 Overcurrent Protection
Characteristics (Typical Value)
(PQ20WZ11)
4
V
O
=3.3V
V
i
–O
=0.5V
Output voltage V
O
(V)
15
PQ20WZ51/PQ20WZ11
Fig. 6 Output Voltage Adjustment
Characteristics
20
R
1
=2kΩ
Output voltage V
O
(V)
3
V
i
–O
=1V
V
i
–O
=2V
2
V
i
–O
=3V
10
1
5
0
0
0
0.5
1.0
1.5
Output current I
O
(A)
2.0
0.1
1
R
2
(kΩ)
10
100
Fig. 7 Reference Voltage Deviation vs.
Junction Temperature (Typical Value)
Reference voltage deviation
∆V
ref
(mV)
Output voltage V
O
(V)
V
IN
=7V
20
V
O
=3.3V(R
1
=2kΩ,R
2
=0.5kΩ)
15
I
O
=0.3A (PQ20WZ51)
=0.5A (PQ20WZ11)
10
25
Fig. 8 Output Voltage vs. Input Voltage
(PQ20WZ51)
8
7
6
5
4
3
2
1
R
L
=∞Ω
R
L
=11Ω
R
L
=6.6Ω
0
1
2
3
4
5
6
Input voltage V
IN
(V)
7
8
R
1
=2kΩ ,R
2
=0.5kΩ
V
C
=2.7V , C
i
=0.33µF , C
0
=47µF
T
j
=25˚C
5
0
–5
–10
–15
–20
–25
–25
0
25
50
75
100
Junction temperature T
j
(˚C)
125
PQ20WZ51
PQ20WZ11
0
Fig. 9 Output Voltage vs. Input Voltage
(PQ20WZ11)
8
7
6
5
4
3
2
1
0
0
1
2
3
4
5
6
Input voltage V
IN
(V)
7
8
R
L
=∞Ω
R
L
=6.6Ω
R
L
=3.3Ω
R
1
=2kΩ ,R
2
=0.5kΩ
V
C
=2.7V , C
i
=0.33µF , C
0
=47µF
T
j
=25˚C
Fig.10 Dropout Voltage vs. Junction
Temperature (PQ20WZ51)
0.2
0.19
V
IN
=3.135V, Vc=2.7V, R
1
=2kΩ, R
2
=500Ω, I
O
=0.3A
Output voltage V
O
(V)
Dropout voltage V
i
–O
(V)
0.18
0.17
0.16
0.15
0.14
0.13
0.12
0.11
0.1
–25
0
25
50
75
100 125
Junction temperature T
j
(˚C)
Low Power-Loss Voltage Regulators
Fig.11 Dropout Voltage vs. Junction
Temperature (PQ20WZ11)
0.18
0.17
PQ20WZ51/PQ20WZ11
Fig.12 Quiescent Current vs. Junction
Temperature
5
4
3
2
1
0
–25
0
25
50
75 100
Junction temperature T
j
(˚C)
125
V
IN
=5V
I
O
=0A
V
C
=2.7V
R
1
=2kΩ
R
2
=500Ω
Dropout voltage V
i
–O
(V)
0.16
0.15
0.14
0.13
0.12
0.11
0.1
V
IN
=3.135V, Vc=2.7V, R
1
=2kΩ, R
2
=500Ω, I
O
=0.5A
–25
0
25
50
75
100
Junction temperature T
j
(˚C)
125
Fig.13 Ripple Rejection vs. Input Ripple
Frequency
80
75
Ripple rejection RR (dB)
Fig.14 Ripple Rejection vs. Output Current
(PQ20WZ51)
80
75
70
65
60
55
50
45
40
T
j
=25˚C
V
IN
=5V
R
1
=2kΩ
R
2
=0.5kΩ
e
i(rms)
=0.5V
f=120Hz (sine wave)
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Output current I
O
(A)
Ripple rejection RR (dB)
70
65
60
55
PQ20WZ51
PQ20WZ11
T
j
=25˚C I
O
=0.3A
45 V
IN
=5V e
i(rms)
=0.5V (sine wave)
R
1
=2kΩ RR=20 log(e
i(rms)
/e
o(rms)
)
R
2
=0.5kΩ
40
0.1
1
10
100
Input ripple frequency f (kHz)
50
Fig.15 Ripple Rejection vs. Output Current
(PQ20WZ11)
80
75
70
65
60
55
50
45
40
T
j
=25˚C
V
IN
=5V
R
1
=2kΩ
R
2
=0.5kΩ
e
i(rms)
=0.5V
f=120Hz (sine wave)
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Output current I
O
(A)
Ripple rejection RR (dB)
Fig.16 Circuit Operating Current vs. Input
Voltage (PQ20WZ51)
20
Quiescent current I
q
(mA)
Circuit operating current I
BIAS
(mA)
Vc=2.7V,
R
1
=2kΩ, R
2
=500Ω
(Vo=3.3V)
15
R
L
=6.6Ω
10
R
L
=11Ω
5
R
L
=∞Ω
0
0
1
2
3
4
5
Input voltage V
IN
(V)
6
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
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