Power supplies for various electronic equipment such as
personal computers
➀ ➁ ➂ ➃ ➄
Internal connection diagram
17.0MIN
3.7MAX
➀
controller
Reference comparator
voltage
➁
➃
➄
➂
➀
DC input(V
IN
)
➁➅
DC output(V
O
)
➂
GND
➃
ON/OFF control
➄
terminal(V
C
)
Output voltage
minute
adjustment
termina(V
ADJ
)
s
❇1
❇1
❇1
Absolute Maximum Ratings
Parameter
Input voltage
ON/OFF control terminal voltage
Output adjustment terminal voltage
Output current
Power dissipation(No heat sink)
Power dissipation(With infinite heat sink)
Junction temperature
Operating temperature
Storage temperature
Soldering temperature
(T
a
=25˚C)
❇2
Symbol
V
IN
V
C
V
ADJ
I
O
P
D1
P
D2
T
j
T
opr
T
stg
T
sol
Rating
10
10
5
5.0
2.2
60
150
–20 to +80
–40 to +150
260(For 10s)
Unit
V
V
V
A
W
W
˚C
˚C
˚C
˚C
❇1
❇2
All are open except GND and applicable terminals.
Overheat protection may operate at 125<=T
j
<=50˚C.
•Please refer to the chapter " Handling Precautions ".
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/
Notice
Low Power-Loss Voltage Regulators
PQ7DV5
s
Electrical Characteristics
(Unless otherwise specified, conditions shall be V
IN
=5V, I
O
=2.5A, V
O
=3V[R
1
=2kΩ]T
a
=25˚C)
Parameter
Input voltage
Output voltage
Reference voltage
Load regulation
Line regulation
Temperature coefficient of reference voltage
Ripple rejection
Dropout voltage
❇3
ON-state voltage for control
ON-state current for control
OFF-state voltage for control
OFF-state current for control
Quiescent current
❇3
Symbol
V
IN
V
O
V
ref
R
eg
L
R
eg
I
T
C
V
O
RR
V
i
-o
V
C(ON)
I
C(ON)
V
C(OFF)
I
C(OFF)
I
q
Conditions
−
−
−
I
O
=5mA to 5.0A
V
IN
=4 to 10V
T
j
=0 to 125˚C
Refer to Fig. 2
V
IN
=3V, I
O
=5A
−
V
C
=2.7V
−
V
C
=0.4V
I
o
=0A
NIN.
3
1.5
1.225
−
−
−
45
−
2.0
−
−
−
−
TYP.
−
−
1.25
0.5
0.5
±0.01
55
−
−
−
−
−
−
MAX.
10
7
1.275
2.0
2.5
−
−
0.5
−
20
0.8
–0.4
17
Unit
V
V
V
%
%
%/˚C
dB
V
V
µA
V
mA
mA
In case of opening control terminal
➃,
output voltage turns on.
Fig. 1 Test Circuit
V
IN
0.33µF
1
2
47µF
R
2
V
ref
R
1
V
V
O
A
+
I
O
V
C
4
3
5
V
R
L
V
o
=V
ref
✕(1+R
2
/R
1
)
[R
1
=2kΩ,V
ref
Nearly=1.25V]
A
A
I
q
2kΩ
Fig. 2 Test Circuit for Ripple Rejection
0.33µF
1
2
47µF
R
2
+
e
i
V
IN
I
O
+
4
3
5
V
ref
V
R
L
V
C
2.7V
R
1
2kΩ
f=120Hz(sine wave)
e
i(rms)
=0.5V
V
IN
=5V
V
O
=3V(R
1
=2kΩ)
I
O
=0.5A
RR=20 log(e
i(rms)
/e
o(rms)
)
Fig. 3 Power Dissipation vs. Ambient
Temperature
60
50
40
30
20
10
P
D1
0
–20
Note)
Fig. 4 Overcurrent Protection
Characteristics(Typical Value)
100
80
60
40
20
0
P
D2
P
D1
:No heat sink
P
D2
:With infinite heat sink
Relative output voltage (%)
Power dissipation P
D
(W)
0
20
40
60
80
Ambient temperature T
a
(˚C)
Oblique line portion : Overheat protection may operate in this area.
0
2.0
4.0
6.0
8.0
10
Output current I
O
(A)
12
Low Power-Loss Voltage Regulators
Fig. 5 Reference Voltage Deviation vs.
Junction Temperature
Reference voltage deviation
∆V
ref
(mV)
10
V
IN
=5V
8 V
O
=3V(R
1
=2kΩ,R
2
=2.8kΩ)
6 I
O
=2.5A
4
2
0
–2
–4
–6
–8
–10
–25
0
25
50
75
100
Junction temperature T
j
(˚C)
125
PQ7DV5
Fig. 6 Output Voltage vs. Input Voltage
4
T
j
=25˚C
V
O
=3V(R
1
=2kΩ,R
2
=2.8kΩ)
R
L
=1.2Ω
R
L
=∞
R
L
=0.6Ω
Output voltage V
O
(V)
3
2
1
0
0
1
2
3
4
Input voltage V
IN
(V)
5
Fig. 7 Circuit Operating Current vs. Input
Voltage
Circuit operating current I
BIAS
(mA)
T
j
=25˚C
V
O
=3V
(R
1
=2kΩ,
R
2
=2.8kΩ)
R
L
=0.6Ω
Fig. 8 Dropout Voltage vs. Junction
Temperature
0.5
0.4
0.3
0.2
0.1
0
–25
V
IN
:0.95V
O
V
O
=3V(R
1
=2kΩ,R
2
=2.8kΩ)
I
O
=5A
100
R
L
=1.2Ω
R
L
=∞
0
0
1
2
3
4
Input voltage V
IN
(V)
5
Dropout voltage V
i–
O
(V)
0
25
50
75
100
Junction temperature T
j
(˚C)
125
Fig. 9 Quiescent Current vs. Junction
Temperature
20
V
IN
=5V
18 V
O
=3V(R
1
=2kΩ,R
2
=2.8kΩ)
16 I
O
=0A
14
12
10
8
6
4
2
0
–25
0
25
50
75
100
Junction temperature T
j
(˚C)
125
Fig.10 Ripple Rejection vs. Input Ripple
Frequency
100
80
60
40
V
IN
=5V
20 V
O
=3V(R
1
=2kΩ,R
2
=2.8kΩ)
Io=0.5A, e
i(rms)
=0.5V,
T
j
=25˚C
0
0.1
1
10
Input ripple frequency f (kHz)
Quiescent current I
q
(mA)
Ripple rejection RR (dB)
100
Low Power-Loss Voltage Regulators
Fig.11 Ripple Rejection vs. Junction
Temperature
100
80
60
40
20
V
IN
=5V
V
O
=3V(R
1
=2kΩ,R
2
=2.8kΩ)
I
O
=0.5A,e
i(rms)
=0.5V
f=120Hz
0
25
50
75
100
Junction temperature T
j
(˚C)
125
PQ7DV5
Ripple rejection RR (dB)
0
–25
s
Standard Connection
D
1
V
IN
1
2
R
2
4
5
3
R
1
+
V
O
+
C
ref
2kΩ
C
IN
C
O
ON/OFF
signal
High or Open : Output ON
Low
: Output OFF
D
1
C
ref
: This device is necessary to protect the element from damage when reverse voltage may be applied to the regulator in
case of input short-circuiting.
: This device is necessary when it is required to enhance the ripple rejection or to delay the output start-up
time*. Otherwise, it is not necessary.
(Care must be taken since C
ref
may raise the gain, facilitating oscillation.)
*The output start-up time proportional to C
ref
✕R
2
.
C
IN
, C
O
: Be sure to mount the devices C
IN
and C
O
as close to the device terminal as possible so as to prevent oscillation.
R
1
, R
2
The standard specification of C
IN
= 0.33µ ,C
O
= 47µ, respectively. However, adjust them as necessary after checking.
: These devices are necessary to set the output voltage. The output voltage V
O
is given by the following formula:
V
O
=V
ref
✕(1+R
2
/R
1
)
(V
ref
is 1.25V TYP)
The standard value of R
1
is 2Ω. But value up to 10kΩ.
Load
NOTICE
q
The 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.
Contact 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.
Observe 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).
q
q
q
Contact 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.
If 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.
This 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.
Contact and consult with a SHARP representative if there are any questions about the contents of this publication.
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Embedded System
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