Low Power-Loss Voltage Regulators
PQ30RV31
PQ30RV31
Variable Output Low Power-Loss Voltage Regulator
■
■
Features
(Unit : mm)
Outline Dimensions
Maximum output current: 3A
● Compact resin full-mold package
● Low power-loss(Dropout voltage: MAX.0.5V)
● Variable output voltage(setting range: 1.5 to 30V)
● Built-in ON/OFF control function.
●
PQ30RV31
4.8MAX
15.6±0.5
7.4±0.2
3.6±0.2
2.8±0.2
29.1MAX
ø3.2±0.1
4–1.4 +0.3
–0
13.5MIN
■
4.5±0.2
10.2MAX
4–0.6 +0.2
–0.1
Applications
(1.5)
(0.5)
3–(2.54)
Power supply for print concentration control of word
processors
● Series power supply for motors and solenoid
● Series power supply for VCRs and TVs
●
➀➁➂➃
Internal connection diagram
➀
➁
Specific IC
➂
■
Absolute Maximum Ratings
❇1
❇1
❇2
❇1
❇2
Parameter
Input 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
➃
➀
➁
➂
➃
DC input(VIN)
DC output(VO)
GND
Output voltage
minute
adjustment
terminal(VADJ)
(Ta=25˚C)
Symbol
Rating
Unit
VIN
35
V
VADJ
7
V
IO
3
A
PD1
W
2.0
PD2
20
W
Tj
150
˚C
Topr
˚C
–20 to +80
Tstg
–40 to +150
˚C
Tsol
260 (For 10s) ˚C
All are open except GND and applicable terminals.
Overheat protection function may operate at 125<=Tj<=150˚C.
•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/
Low Power-Loss Voltage Regulators
Electrical Characteristics
(Unless otherwise specified, condition shall be VIN=12V, Vo=10V, Io=1.5A, R1=390Ω, Ta=25˚C)
Parameter
Input voltage
output voltage
Load regulation
Line regulation
Ripple rejection
Reference voltage
Temperature coefficient of reference voltage
Symbol
VIN
VO
RegL
RegI
RR
Vref
TcVref
Dropout voltage
Vi-O
Quiescent current
Iq
MIN.
4.5
1.5
−
−
45
1.225
−
−
−
−
TYP.
−
−
0.5
0.5
70
1.25
±1.0
0.3
0.2
−
MAX.
35
30
2.0
2.5
−
1.275
−
1.0
0.5
7
Unit
V
V
%
%
dB
V
%/˚C
V
mA
Input voltage shall be the value when output voltage is 95% in comparison with the initial value.
Fig. 1 Test Circuit
VIN
1
47µF
2
R2
3
0.33µF
A
4
VO
IO
A
+
R1
Iq 390Ω
R2
1+ –––––
R1
VO=Vref ×
V
Vref
RL
V
[R1=390Ω,Vref Nearly=1.25V]
Fig. 2 Test Circuit of Ripple Rejection
1
+
2
ei
R2
3
VIN
0.33µF
47µF
4
R1
390Ω
IO
+
V eo
RL
Fig. 3 Power Dissipation vs. Ambient
Temperature
40
Power dissipation PD (W)
❇3
Conditions
−
−
IO=5mA to 3A
VIN=11 to 21V, IO=0.5mA
Refer to Fig. 2
−
Tj=0 to 125˚C,IO=5mA
❇3, IO=3A
❇3, IO=2A
IO=0
PD1 :No heat sink
PD2 :With infinite heat sink
30
PD2
20
10
IO=0.5A, VIN=12V, VO=10V
f=120Hz(sine wave)
ei(rms)=0.5Vrms
RR=20 log(ei(rms)/eo(rms))
Fig. 4 Overcurrent Protection Characteristics
(Typical Value)
100
Relative output voltage (%)
■
PQ30RV31
80
60
40
20
PD1
0
0
0
50
100
150
Ambient temperature Ta (˚C)
Note) Oblique line portion : Overheat protection may operate in this area.
0
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0
Output current IO (A)
Low Power-Loss Voltage Regulators
Fig. 5 Output Voltage Adjustment
Characteristics (Typical value)
PQ30RV31
Fig. 6 Output Voltage vs. Input Voltage
15
30
R1=390Ω,R2=2.7kΩ,Tj=25˚C
Output voltage VO (V)
Output voltage VO (V)
R1 390Ω
25
20
15
10
10
RL=∞
5
RL=3.3Ω
5
0
101
0
102
103
R2 (Ω)
104
0.5
IO=3A
0.4
0.3
2A
0.2
1A
0.1
No Cref
60
50
40
30
20
Tj=25˚C,VIN=12V
R1=390Ω,R2=2.7kΩ
IO=0.5A,ei(rms)=0.5V
0
100
75
0
25
50
Junction temperature Tj (˚C)
0.1
125
Fig. 9 Ripple Rejection vs. Output Current
1
10
100
Input ripple frequency f (kHz)
1000
Fig.10 Output Peak Current vs. Dropout
Voltage (Typical value)
90
7
Output peak current IOP (A)
Cref=3.3µF
Ripple rejection RR (dB)
70
10
0.5A
0
–25
Cref=3.3µF
80
Ripple rejection RR (dB)
Dropout voltage Vi–O (V)
90
R1=390Ω,R2=2.7kΩ
VIN ; 0.95VO
0.6
20
Fig. 8 Ripple Rejection vs. Input Ripple
Frequency
Fig. 7 Dropout Voltage vs. Junction
Temperature
0.7
5
10
15
Input voltage VIN (V)
0
105
80
No Cref
70
60
50 Tj=25˚C
R1=390Ω,R2=2.7kΩ
40 VIN=12V,ei(rms)=0.5V,f=120Hz
0
1
2
Output current IO (A)
6.5
6
5.5
5
4.5
R1=390Ω,R2=2.7kΩ,Ta=25˚C
4
3
0
1
2 3 4 5 6 7 8
Dropout voltage Vi–O (V)
9 10
Low Power-Loss Voltage Regulators
PQ30RV31
Fig.11 Ripple Rejection vs. Input Ripple
Frequency
Output peak current IOP (A)
7
6.5
6
5.5
5
4.5
4
–25
■
VIN=15V,R1=390Ω,R2=2.7kΩ
0
25
50
75
Dropout voltage Vi–O (V)
100
ON/OFF Operation
D1
VIN
1
R2
VO
2
R2
D2
4
3
CIN
D2
VADJ
VADJ R1
R1
+
R3
CO
RL
RD
RL
VO'
VC
High : Output OFF
Low : Output ON
Equivalent Circuit
in OFF-state
ON/OFF operation is available by mounting externally D2 and R3.
When VADJ is forcibly raised above VREF(1.25V TYP)by applying the external signal, the output is turned off(pass transistor
of regulator is turned off. When the output is OFF, VADJ must be higher then VREF MAX., and at the same time must be lower
than maximum rating 7V.
In OFF-state, the load current flows to RL from VADJ through R2. Therefore the value of R2 must be as high as possible.
● VO'=VADJ✕RL/(RL+R2)
occurs at the load. OFF-state equivalent circuit R1 up to 10kΩ is allowed. Select as high value of RL and R2 as possible in this
range. In some case, as output voltage is getting lower(VO<1V), impedance of load resistance rises. In such condition, it is
sometime impossible to obtain the minimum value of VO'. So add the dummy resistance indicated by RD in the figure to the
circuit parallel to the load.
●
●
NOTICE
●
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).
●
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.
Mouser Electronics
Authorized Distributor
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