210
Low Power-Loss Voltage Regulators
PQ20RX05/PQ20RX11
s
Features
q
Low power-loss
(Dropout voltage: MAX. 0.5V)
q
Compact resin full mold package
(Equivalent to TO-220)
q
With built-in ON/OFF control function
q
Variable output voltage (setting range:3.0 to 20V)
q
0.5A output (
PQ20RX05
)
1.0A output (
PQ20RX11
)
q
Reference voltage precision: 2.5%
q
With built-in overcurrent protection, overheat protection,
ASO protection circuit
ASO: Area of Safety Operation
s
Applications
q
Power supplies for various electronic equipment such as
AV, OA equipment
q
CRT displays
s
Outline Dimensions
(Unit : mm)
Variable Output Type Low Power-Loss Voltage Regulator with ON/OFF Control Function
Please refer to the chapter " Handling Precautions ".
PQ20RX05/PQ20RX11
s
Absolute Maximum Ratings
Parameter
Symbol
Rating
Unit
V
V
V
A
W
C
C
C
C
f1
f1
f1
f2
f3
f1
All are open except GND and applicable terminals.
f2
P
D1
: No heat sink, P
D2
: With infinite heat sink
f3
Overheat protection may operate at 125<=T
j
<=150C.
(T
a
=25C)
Input voltage
ON/OFF control terminal voltage
Output adjustment terminal voltage
Output current
PQ20RX05
PQ20RX11
Power dissipation
Junction temperature
Operating temperature
Storage temperature
Soldering temperature
V
IN
V
c
V
ADJ
I
o
P
D1
P
D2
T
j
T
opr
T
stg
T
sol
24
24
7
0.5
1
1.5(
PQ20RX11
),1.25(
PQ20RX05
)
15(
PQ20RX11
),10(
PQ20RX05
)
150
20 to +80
40 to +150
260(for 10s)
( )
( )
( )
DC output Vo
GND
DC input
ON/OFF control terminal
V
IN
Output voltage adjustment terminal
Vc
( )
V
ADJ
1
1
1
2
2
3
3
3
2
4
5
4
5
4
5
Specific IC
PQ20RX11
0.8
4.5
2.8
24.6
10.2MAX
4.4
MIN
3.2 0.1
7.4
0.2
Epoxy resin
0.5
1.5
5.0
0.5
16.4
0.7
5.0
8.2 0.7
3.2 0.5
4
1.7
()
(
)
(
)
(
)
(
)
Internal connection diagram
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://www.sharp.co.jp/ecg/
211
Low Power-Loss Voltage Regulators
PQ20RX05/PQ20RX11
s
Electrical Characteristics
Fig. 4 Power Dissipation vs. Ambient
Temperature (PQ20RX11)
Fig. 1 Test Circuit
Fig. 2 Test Circuit of Ripple Rejection
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Input voltage
Output voltage
Load regulation
Line regulation
Ripple rejection
Reference voltage
Temperature coefficient of reference voltage
Dropout voltage
Quiescent current
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
V
V
%
%
dB
V
%
V
mA
V
A
V
A
A
f4
PQ20RX05
: I
O
=0.3A,
PQ20RX11
: I
O
=0.5A
f5
PQ20RX05
: I
O
=5mA to 0.5A,
PQ20RX11
: I
O
=5mA to 1.0A
f6
Input voltage shall be the value when output voltage is 95% in comparison with the initial value.
f7
In case of opening ON/OFF control terminal , output voltage turns off.
V
IN
V
O
R
eg
L
R
eg
I
RR
V
ref
T
C
V
ref
V
i-O
I
q
V
C(ON)
I
C(ON)
V
C(OFF)
I
C(OFF)
I
qs
3.5
3.0
45
2.574
2.0
2.64
1.0
24
20
2.0
2.5
2.706
0.5
8
200
0.8
2.0
5.0
f5
V
IN
=4 to 10V, Io=5mA
Refer to Fig. 2
Tj=0 to 125C, Io=5mA
f4
,
f6
Io=0A
Io=0A
Io=0A, Vc=0.4V
Vc=0.4V
(Unless otherwise specified, V
IN
=5V, V
O
=3.3V,
f4
, R
1
=2k
, R
2
=500
, V
C
=2.7V, T
a
=25C)
f7
2
V
A
V
IN
V
C
I
q
2k
I
O
V
O
R
L
47
F
0.33
F
+
R
2
R
1
V
O
=V
ref x
1+ Nearly=2.64
x
1+
R
2
R
1
R
2
R
1
[R
1
=2k
,V
ref
Nearly=2.64V]
1
4
5
3
A
A
V
2
V
47
F
V
IN
e
i
eo
2k
I
O
R
L
2.7V
0.33
F
+
R
2
R
1
+
47
F
f
=120Hz(sine wave)
e
i
=0.5V
rms
I
O
=0.3A
RR=20 log(e
i
/e
o
)
V
IN
=5V
V
O
=3.3V(R
1
=2k
)
1
4
5
3
2
Fig. 3 Power Dissipation vs. Ambient
Temperature (PQ20RX05)
0
20
0
P
D1
P
D2
P
D1
:No heat sink
P
D2
:With infinite heat sink
50
80 100
150
5
10
15
20
Power dissipation P
D
(W)
Ambient temperature T
a
(C)
0
25
0
P
D1
P
D2
P
D1
:No heat sink
P
D2
:With infinite heat sink
50
80 100
150
5
10
15
20
Power dissipation P
D
(W)
Ambient temperature T
a
(C)
Note) Oblique line portion : Overheat protection may operate in this area.
Note) Oblique line portion : Overheat protection may operate in this area.
212
Low Power-Loss Voltage Regulators
PQ20RX05/PQ20RX11
Fig. 5 Overcurrent Protection
Characteristics (Typical Value)
(PQ20RX05)
Fig. 6 Overcurrent Protection
Characteristics (Typical Value)
(PQ20RX11)
Fig. 7 Output Voltage Adjustment
Characteristics
Fig. 8 Reference Voltage Deviation vs.
Junction Temperature (Typical Value)
0
0.5
1.0
1.5
2.0
4
3
2
1
0
Output voltage V
O
(V)
Output current I
O
(A)
V
i
O
=2V
V
i
O
=3V
V
i
O
=0.5V
V
O
=3.3V
V
i
O
=1V
0
0.5
1.0
1.5
2.0
4
3
2
1
0
Output voltage V
O
(V)
Output current I
O
(A)
V
i
O
=2V
V
i
O
=3V
V
i
O
=0.5V
V
O
=3.3V
V
i
O
=1V
R
2
(k
)
Output voltage V
O
(V)
0.1
1
100
10
R
1
=2k
0
5
10
15
20
0
25
50
75
100
125
15
20
25
5
5
15
10
0
10
20
V
IN
=7V
V
O
=3.3V(R
1
=2k
,R
2
=0.5k
)
I
O
=0.3A (
PQ20RX05
)
=0.5A (
PQ20RX11
)
25
Reference voltage deviation
V
ref
(mV)
Junction temperature T
j
(C)
25
PQ20RX05
PQ20RX11
Fig. 9 Output Voltage vs. Input Voltage
(PQ20RX05)
Fig.10 Output Voltage vs. Input Voltage
(PQ20RX11)
Output voltage V
O
(V)
Input voltage V
IN
(V)
0
1
2
3
5
6
7
8
4
R
L
=6.6
R
L
=
1
0
2
5
6
7
3
4
8
R
L
=11
V
C
=2.7V , C
i
=0.33
F , C
0
=47
F
T
j
=25C
R
1
=2k
,R
2
=0.5k
Output voltage V
O
(V)
Input voltage V
IN
(V)
0
1
2
3
5
6
7
8
4
R
L
=3.3
R
L
=
1
0
2
5
6
7
3
4
8
R
L
=6.6
V
C
=2.7V , C
i
=0.33
F , C
0
=47
F
T
j
=25C
R
1
=2k
,R
2
=0.5k
213
Low Power-Loss Voltage Regulators
PQ20RX05/PQ20RX11
Fig.11 Dropout Voltage vs. Junction
Temperature (PQ20RX05)
Fig.12 Dropout Voltage vs. Junction
Temperature (PQ20RX11)
Fig.13 Quiescent Current vs. Junction
Temperature
Fig.14 Ripple Rejection vs. Input Ripple
Frequency
Fig.15 Ripple Rejection vs. Output Current
(PQ20RX05)
Fig.16 Ripple Rejection vs. Output Current
(PQ20RX11)
Junction temperature T
j
(C)
Dropout voltage V
i
O
(V)
25
0
25
50
75
100
125
0.14
0.13
0.12
0.11
0.1
0.15
0.16
0.17
0.18
0.19
0.2
V
IN
=3.135V, Vc=2.7V, R
1
=2k
, R
2
=500
, Io=0.3A
Junction temperature T
j
(C)
Dropout voltage V
i
O
(V)
25
0
25
50
75
100
125
0.11
0.1
0.12
0.13
0.14
0.15
0.16
0.17
0.18
V
IN
=3.135V, Vc=2.7V, R
1
=2k
, R
2
=500
, Io=0.5A
T
j
=25C
RR=20log (e
i
/e
0
)
I
O
=0.3A
e
i
=0.5V
rms
(sine wave)
V
IN
=5V
R
1
=2k
R
2
=0.5k
Ripple rejection RR (dB)
Input ripple frequency f
(kHz)
0.1
1
10
100
45
40
50
55
60
65
70
75
80
PQ20RX11
PQ20RX05
T
j
=25C
e
i
=0.5V
rms
f=120Hz (sine wave)
V
IN
=5V
R
1
=2k
R
2
=0.5k
Output current I
O
(A)
Ripple rejection RR (dB)
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
45
40
50
55
60
65
70
75
80
T
j
=25C
e
i
=0.5V
rms
f=120Hz (sine wave)
V
IN
=5V
R
1
=2k
R
2
=0.5k
Output current I
O
(A)
Ripple rejection RR (dB)
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
45
40
50
55
60
65
70
75
80
Junction temperature T
j
(C)
Quiescent current I
q
(mA)
0
25
50
75
100
125
25
0
1
2
3
4
5
V
IN
=5V
I
O
=0A
V
C
=2.7V
R
1
=2k
R
2
=500
214
Low Power-Loss Voltage Regulators
PQ20RX05/PQ20RX11
Fig.17 Circuit Operating Current vs. Input
Voltage (PQ20RX05)
Fig.18 Circuit Operating Current vs. Input
Voltage (PQ20RX11)
0
1
2
3
4
5
6
20
15
10
5
0
Circuit operating current I
BIAS
(mA)
Input voltage V
IN
(V)
R
L
=6.6
R
L
=11
R
L
=
Vc=2.7V,
R
1
=2k
, R
2
=500
(Vo=3.3V)
0
1
2
3
4
5
6
7
8
20
25
30
15
10
5
0
Circuit operating current I
BIAS
(mA)
Input voltage V
IN
(V)
R
L
=3.3
R
L
=6.6
R
L
=
Vc=2.7V,
R
1
=2k
, R
2
=500
(Vo=3.3V)
s
Typical Application
2k
V
O
C
O
DC input
Cin
ON/OFF signal
High : Output ON
Low or Open : Output OFF
+
R
2
R
1
V
IN
1
4
3
Load
2
5
115
Application Circuits
NOTICE
qThe circuit application examples in this publication are provided to explain representative applications of
SHARP devices and are not intended to guarantee any circuit design or license any intellectual property
rights. SHARP takes no responsibility for any problems related to any intellectual property right of a
third party resulting from the use of SHARP's devices.
qContact SHARP in order to obtain the latest device specification sheets before using any SHARP device.
SHARP reserves the right to make changes in the specifications, characteristics, data, materials,
structure, and other contents described herein at any time without notice in order to improve design or
reliability. Manufacturing locations are also subject to change without notice.
qObserve the following points when using any devices in this publication. SHARP takes no responsibility
for damage caused by improper use of the devices which does not meet the conditions and absolute
maximum ratings to be used specified in the relevant specification sheet nor meet the following
conditions:
(i) The devices in this publication are designed for use in general electronic equipment designs such as:
--- Personal computers
--- Office automation equipment
--- Telecommunication equipment [terminal]
--- Test and measurement equipment
--- Industrial control
--- Audio visual equipment
--- Consumer electronics
(ii)Measures such as fail-safe function and redundant design should be taken to ensure reliability and
safety when SHARP devices are used for or in connection with equipment that requires higher
reliability such as:
--- Transportation control and safety equipment (i.e., aircraft, trains, automobiles, etc.)
--- Traffic signals
--- Gas leakage sensor breakers
--- Alarm equipment
--- Various safety devices, etc.
(iii)SHARP devices shall not be used for or in connection with equipment that requires an extremely
high level of reliability and safety such as:
--- Space applications
--- Telecommunication equipment [trunk lines]
--- Nuclear power control equipment
--- Medical and other life support equipment (e.g., scuba).
qContact a SHARP representative in advance when intending to use SHARP devices for any "specific"
applications other than those recommended by SHARP or when it is unclear which category mentioned
above controls the intended use.
qIf the SHARP devices listed in this publication fall within the scope of strategic products described in the
Foreign Exchange and Foreign Trade Control Law of Japan, it is necessary to obtain approval to export
such SHARP devices.
qThis publication is the proprietary product of SHARP and is copyrighted, with all rights reserved. Under
the copyright laws, no part of this publication may be reproduced or transmitted in any form or by any
means, electronic or mechanical, for any purpose, in whole or in part, without the express written
permission of SHARP. Express written permission is also required before any use of this publication
may be made by a third party.
qContact and consult with a SHARP representative if there are any questions about the contents of this
publication.
PDF 
ZIP