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Low Power-Loss Voltage Regulators
PQ30RV31
PQ30RV31
Variable Output Low Power-Loss Voltage Regulator
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Features
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Outline Dimensions
10.2MAX
(Unit : mm)
4.50.2 2.80.2
29.1MAX
PQ30RV31
o3.20.1
4-1.4 +0.3 -0
13.5MIN
4-0.6 +0.2 -0.1
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Applications
3-(2.54)
(0.5)
Power supply for print concentration control of word processors q Series power supply for motors and solenoid q Series power supply for VCRs and TVs
Internal connection diagram
Specific IC

DC input(VIN) DC output(VO) GND Output voltage minute adjustment terminal(VADJ)
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1 1
Absolute Maximum Ratings
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
(Ta=25C) 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
2
1 2
All are open except GND and applicable terminals. Overheat protection function may operate at 125<=Tj<=150C.
*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/
4.8MAX 15.60.5
(1.5)
Maximum output current: 3A q Compact resin full-mold package q Low power-loss(Dropout voltage: MAX.0.5V) q Variable output voltage(setting range: 1.5 to 30V) q Built-in ON/OFF control function.
7.40.2
3.60.2
Low Power-Loss Voltage Regulators
PQ30RV31
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Electrical Characteristics
Parameter
(Unless otherwise specified, condition shall be VIN=12V, Vo=10V, Io=1.5A, R1=390, Ta=25C) Symbol VIN VO RegL RegI RR Vref TcVref Vi-O Iq Conditions - - IO=5mA to 3A VIN=11 to 21V, IO=0.5mA Refer to Fig. 2 - Tj=0 to 125C,IO=5mA 3, IO=3A 3, IO=2A IO=0 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 output voltage Load regulation Line regulation Ripple rejection Reference voltage Temperature coefficient of reference voltage Dropout voltage Quiescent current
3
Input voltage shall be the value when output voltage is 95% in comparison with the initial value.
Fig. 1 Test Circuit
VIN 1 2 R2 3 0.33F 4 R1 Iq 390
+
47F
VO
A
Vref
IO
VO=Vref x
V
RL
R2 1+ ----- R1
A
V
[R1=390,Vref Nearly=1.25V]
Fig. 2 Test Circuit of Ripple Rejection
+
1 ei VIN 0.33F 3
2 R2 4 R1 390 47F
+
IO
V eo
RL
IO=0.5A, VIN=12V, VO=10V f=120Hz(sine wave) ei(rms)=0.5Vrms RR=20 log(ei(rms)/eo(rms))
Fig. 3 Power Dissipation vs. Ambient Temperature
40
Power dissipation PD (W)
Fig. 4 Overcurrent Protection Characteristics (Typical Value)
100
Relative output voltage (%)
PD1 :No heat sink PD2 :With infinite heat sink
30
80 60 40 20 0
20
PD2
10 PD1 0
50 100 150 Ambient temperature Ta (C) Note) Oblique line portion : Overheat protection may operate in this area.
0
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)
30 R1 390
Output voltage VO (V)
PQ30RV31
Fig. 6 Output Voltage vs. Input Voltage
15 R1=390,R2=2.7k,Tj=25C
25 20 15 10 5 0 101
Output voltage VO (V)
10 RL= 5
RL=3.3
0
102 103 R2 () 104 105
0
5 10 15 Input voltage VIN (V)
20
Fig. 7 Dropout Voltage vs. Junction Temperature
0.7 0.6
Dropout voltage Vi-O (V)
Fig. 8 Ripple Rejection vs. Input Ripple Frequency
90 80 Cref=3.3F
R1=390,R2=2.7k VIN ; 0.95VO
Ripple rejection RR (dB)
70 60 50 40 30 20 10 0 Tj=25C,VIN=12V R1=390,R2=2.7k IO=0.5A,ei(rms)=0.5V 0.1 1 10 100 Input ripple frequency f (kHz) 1000 No Cref
0.5 0.4 0.3 0.2 1A 0.1 0 -25 0.5A 100 75 0 25 50 Junction temperature Tj (C) 125 IO=3A 2A
Fig. 9 Ripple Rejection vs. Output Current
90
Fig.10 Output Peak Current vs. Dropout Voltage (Typical value)
7
80 70 60 50 Tj=25C R1=390,R2=2.7k 40 VIN=12V,ei(rms)=0.5V,f=120Hz 0 1 2 Output current IO (A) 3 No Cref
Output peak current IOP (A)
Cref=3.3F
Ripple rejection RR (dB)
6.5 6 5.5 5 4.5 4 0 R1=390,R2=2.7k,Ta=25C 1 2345678 Dropout voltage Vi-O (V) 9 10
Low Power-Loss Voltage Regulators
Fig.11 Ripple Rejection vs. Input Ripple Frequency
7
PQ30RV31
Output peak current IOP (A)
6.5 6 5.5 5 4.5 4 -25
VIN=15V,R1=390,R2=2.7k
0
25 50 75 Dropout voltage Vi-O (V)
100
s
ON/OFF Operation
D1
VADJ
D2
VIN
1
2 R2 4 3 D2
+
VO R1 RL
R2
CIN
VADJ R1
R3
CO
RL VO'
RD
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. q VO'=VADJRL/(RL+R2) occurs at the load. OFF-state equivalent circuit R1 up to 10k 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.
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NOTICE
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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).
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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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