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Voltage Regulators
AN6531
4-pin variable positive output voltage regulator
I Overview
The AN6531 is a monolithic 4-pin variable positive output voltage regulator. With an external resistor, it provides any stabilized output voltages between 5V and 30V, and is optimum for the power circuits with a current capacity of up to 0.5A. This IC incorporates various protection circuits.
9.6+0.5 -0.1 3.1
Unit : mm
12.5 max.
SSIP004-P-0000
I Block Diagram
RSC
Output
Pass Tr Current Source
Short Circuit Protection Thermal Protection
1
2
3
Ref. Voltage
+ Error Amp. -
4
Control Common Input
Output
Start Circuit
3.3 max.
* Wide range of output voltages: VO = 5 to 30V * Built-in thermal overload protection circuit * Built-in overcurrent protection circuit * Built-in ASO (area of safe operation) protection circuit
1.8
0.70.2 2.3 2.3 2.3 1.5
9.0 min.
I Features
3-1.0
2.0
4.0
0.50.1 1.3
1
AN6531
I Absolute Maximum Ratings at Ta = 25C
Parameter Supply voltage Supply current Power dissipation Operating ambient temperature Storage temperature * Symbol VCC ICC * PD Topr Tstg Rating 40 1.5 7.5 -20 to +75 -55 to +150
Voltage Regulators
Unit V A W C C
The internal circuit is provided with a current limiting circuit.
I Electrical Characteristics at Ta = 25C
Parameter Output voltage tolerance Symbol VO Conditions VI = VO+3V to VO+15V, IO = 5 to 350mA, Tj = 25C VO = 5V, IO = 200mA, VI = 7.5 to 25V, Tj = 25C VO = 18V, IO = 5mA, VI = 21 to 33V, Tj = 25C VO = 18V, IO = 200mA, VI = 21 to 25V, Tj = 25C VO = 5V, VI = 12V, IO = 5 to 500mA, Tj = 25C Tj = 25C Tj = 25C VI = 8 to 18V, VO = 5V, f = 120Hz VO = 5V, f = 10Hz to 100kHz IO = 500mA, Tj = 25C VI = 35V, VO = 5V, Tj = 25C VO = 5V, Tj = 25C VO = 5V IO = 5mA Tj = 25C Tj = -55 to +25C Tj = 25 to 150C 4.8 0.4 62 Min Typ Max 4 1 0.75 0.67 1 3 1 80 40 2 50 1 0.5 - 0.5 5 5.2 600 1.4 5 8 Unit % % % % % mA A dB V V mA A mV/C V
Line regulation
REGIN
Load regulation Bias current Control pin current Ripple rejection ratio Output noise voltage Minimum input/output voltage difference Output short-circuit current Peak output current Output voltage temperature coefficient Control pin voltage
REGL IBias Icont RR Vno VDIF(min) IOS IOP VO/Ta Vcont
Note 1) The specified condition Tj = 25C means that the test should be carried out within so short a test time (within 10ms) that the characteristic value drift due to the chip junction temperature rise can be ignored. Note 2) Unless otherwise specified, VI = 10V, VO = 5V, IO = 350mA, CI = 0.33F, CO = 0.1F
2
Voltage Regulators
I Main Characteristics
10 1.4 1.2
AN6531
Minimum input/output voltage difference VDIF(min) (V)
PD Ta
(1) TC = Ta (2) With a 10C/W heat sink (3) With a 20C/W heat sink (4) Without heat sink (1) 6 (2) 4 (3) 2 (4) 0 0 20 40 60 80 100 120 140 160
IO(peak) VDIF
VDIF(min) Tj
2.8 2.4 2.0 1.6 1.2 0.8 0.4
Peak output current IOP (A)
Power dissipation PD (W)
8
1.0 0.8 0.6 0.4 0.2 0 125C 25C
IO = 500mA 200mA 100mA 10mA 0mA
Tj = 0C
0
4
8
12
16
20
24
28
32
-80 -40
0
40
80 120 160 200 240
Ambient temperature Ta (C)
Input/output voltage difference VDIF (V)
Junction temperature Tj (C)
RR f
120 VI = 8 to 18V VO = 5V IO = 20mA
Transient response to input variation
15
Transient response to load variation
0.5
Ripple rejection ratio RR (dB)
100
Output voltage fluctuation (mV)
80
5 10
Output voltage fluctuation (V)
10
Input voltage VI (V)
0
0.5
60
0 -0.5 -1.0 0 20 40 60 80 100
40
0 -10 -20
20
0 10 100 1k 10k 100k 1M
0
2
4
6
8
10
Frequency f (Hz)
Time t (s)
Time t (s)
Current limiting characteristic
6 104 VI = 10V VO = 5V IO = 20mA CO = 0.1F Ta = 25C 103
ZO f
4
3
VI = 10V VO = 5V Tj = 25C
Output impedance ZO (m)
5
Output voltage VO (V)
2
102
1
0 0 0.2 0.4 0.6 0.8 1.0 1.2
10 10 100 1k 10k 100k 1M
Output current IO (A)
Frequency f (Hz)
Load current IL (A)
1.0
3
AN6531
I Basic Regulator Circuit
+V1 3 Input Output 4 R2 1 Vcont R1 CO 0.1F +VO
Voltage Regulators
AN6531
CI 0.33F Cont Common 2
R1 + R 2 R1 (Vcont 5V, R1 = 5k) CI is necessary when the VI line is long. CO improves the transient response. VO = Vcont
I Application Circuit Examples
1. Current bootstrap circuit 2. Current bootstrap circuit (with current limiting circuit)
VI IO VO R2 1 5k R1 0.1F RSC Ie2 R3 6 3 Input IR 0.33F IP Output 4 6 R3 IR 0.33F Q2 3 IP Input Output 4 1 5k R1 IO VO R2 0.1F Ie1 Q1
VI
Q1
AN6531
Cont Common 2
AN6531
Cont Common 2
RSC = R3 =
VBE(Q2) Ie1(max)
R3 =
VBE(Q1) * ( + 1) IP - IO
VBE(Q1) + Ie1RSC IO - Ie1 VBE(Q1) + VBE(Q2) R3
Ie2(max) = IP(max) -
4
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(1) An export permit needs to be obtained from the competent authorities of the Japanese Government if any of the products or technologies described in this material and controlled under the "Foreign Exchange and Foreign Trade Law" is to be exported or taken out of Japan. (2) The technical information described in this material is limited to showing representative characteristics and applied circuit examples of the products. It does not constitute the warranting of industrial property, the granting of relative rights, or the granting of any license. (3) The products described in this material are intended to be used for standard applications or general electronic equipment (such as office equipment, communications equipment, measuring instruments and household appliances). Consult our sales staff in advance for information on the following applications: * Special applications (such as for airplanes, aerospace, automobiles, traffic control equipment, combustion equipment, life support systems and safety devices) in which exceptional quality and reliability are required, or if the failure or malfunction of the products may directly jeopardize life or harm the human body. * Any applications other than the standard applications intended. (4) The products and product specifications described in this material are subject to change without notice for reasons of modification and/or improvement. At the final stage of your design, purchasing, or use of the products, therefore, ask for the most up-to-date Product Standards in advance to make sure that the latest specifications satisfy your requirements. (5) When designing your equipment, comply with the guaranteed values, in particular those of maximum rating, the range of operating power supply voltage and heat radiation characteristics. Otherwise, we will not be liable for any defect which may arise later in your equipment. Even when the products are used within the guaranteed values, redundant design is recommended, so that such equipment may not violate relevant laws or regulations because of the function of our products. (6) When using products for which dry packing is required, observe the conditions (including shelf life and after-unpacking standby time) agreed upon when specification sheets are individually exchanged. (7) No part of this material may be reprinted or reproduced by any means without written permission from our company.
Please read the following notes before using the datasheets
A. These materials are intended as a reference to assist customers with the selection of Panasonic semiconductor products best suited to their applications. Due to modification or other reasons, any information contained in this material, such as available product types, technical data, and so on, is subject to change without notice. Customers are advised to contact our semiconductor sales office and obtain the latest information before starting precise technical research and/or purchasing activities. B. Panasonic is endeavoring to continually improve the quality and reliability of these materials but there is always the possibility that further rectifications will be required in the future. Therefore, Panasonic will not assume any liability for any damages arising from any errors etc. that may appear in this material. C. These materials are solely intended for a customer's individual use. Therefore, without the prior written approval of Panasonic, any other use such as reproducing, selling, or distributing this material to a third party, via the Internet or in any other way, is prohibited.
2001 MAR

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