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PDF SPX431A Data sheet ( Hoja de datos )
| Número de pieza | SPX431A | |
| Descripción | Precision Adjustable Shunt Regulator | |
| Fabricantes | Exar | |
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April 2009
SPX431A
Precision Adjustable Shunt Regulator
Rev. 2.0.0
GENERAL DESCRIPTION
The SPX431A is a three-terminal adjustable
shunt voltage regulator providing a highly
accurate bandgap reference.
The SPX431A acts as an open-loop error
amplifier with a 2.5V temperature
compensation reference. The SPX431A has
thermal stability, wide operating current of
150mA and broad temperature range of -40°C
to 125°C, making it suitable for a variety of
applications which require a low-cost, high
performance solution. The SPX431A tolerance
of 0.5% is proven to be sufficient to overcome
all other errors in the system to virtually
eliminate the need for trimming in the power
supply manufacturer's assembly line and
contribute a significant cost savings. The
output voltage may be adjusted to any value
between VREF and 36 volts with two external
resistors.
The SPX431A is available in RoHS compliant,
lead free TO-92 and SOT89 packages.
APPLICATIONS
• Charger
• Switching Power Supplies
• Graphic Cards
• Monitors, VCRs, TVs
FEATURES
• 0.5% Precise Output Voltage
− Adjustable up to 36V
• Wide Operating Current
− 1mA to 150mA
• Low Temperature Coefficient
at 30ppm/°C
• Extended Temperature Range
− -40°C to +125°C
• Improved Replacment for TL431
• RoHS Compliant, Lead Free
TO-92 and SOT-89 Packages
TYPICAL APPLICATION DIAGRAM
Fig. 1: SPX431A Application Diagram
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
1 page  
SPX431A
Precision Adjustable Shunt Regulator
Fig. 9: Test Circuit for Gain vs Frequency Responce
Fig. 10: Small Signal Gain vs Frequency
Fig. 11: Test Circuit for Pulse Response
Fig. 12: Pulse Response
Fig. 13: Test Circuit for Stability
© 2009 Exar Corporation
Fig. 14: Stability Boundary Conditions
5/11
Rev. 2.0.0
5 Page 
SPX431A
Precision Adjustable Shunt Regulator
REVISION HISTORY
Revision
Date
2.0.0
04/15/09
Description
Reformat of Datasheet
Updated ordering part numbers
Updated application and block diagram
FOR FURTHER ASSISTANCE
Email:
Exar Technical Documentation:
http://www.exar.com/TechDoc/default.aspx?
EXAR CORPORATION
HEADQUARTERS AND SALES OFFICES
48720 Kato Road
Fremont, CA 94538 – USA
Tel.: +1 (510) 668-7000
Fax: +1 (510) 668-7030
www.exar.com
NOTICE
EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve
design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein,
conveys no license under any patent or other right, and makes no representation that the circuits are free of patent
infringement. Charts and schedules contained here in are only for illustration purposes and may vary depending upon a
user’s specific application. While the information in this publication has been carefully checked; no responsibility, however,
is assumed for inaccuracies.
EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or
malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its
safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in
writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all
such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances.
Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.
© 2009 Exar Corporation
11/11
Rev. 2.0.0
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet SPX431A.PDF ] | |
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