Precision Adjustable Shunt Regulator


Information Precision Adjustable Shunt Regulator
Package SOT89-3, SOIC-8
Temperature Range (°C) -55 to 125
Reference Voltage Adjustable, Fixed
VOUT (V) -
VOUT Adj MIN (V) 2.5
VOUT Adj MAX (V) 36
Operating Current (MAX) (mA) 150
Operating Current (MIN) (mA) 1
IQ (µA) 1000
Initial Accuracy (%) 0.4
IREF (µA) 0.7
Temperature Coefficient (ppm/°C) 30
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  • Trimmed bandgap reference to 0.4%
  • Wide operating current 1mA to 150mA
  • Extended temperature range:
  • -55°C to 125°C
  • Low temperature coefficient 30 ppm/°C
  • Offered in SOIC, SOT-89

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets SPX1431 Precision Adjustable Shunt Regulator 2.0.1 July 2013 2.2 MB
Application Notes AN200, Downloading and Installing CAD Symbols and Footprints with Ultra Librarian April 2019 1.2 MB
Product FAQs SPX1431 FAQ 1.0.0 March 2007 160 KB
Product Brochures Power Management Brochure October 2020 2.4 MB
Symbols & Footprints SPX1431M1-L/TR CAD File (.bxl) September 2018 27.3 KB
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
SPX1431M1-L/TR N Y Y Y Y L2 / 260ᵒC SOT-89-3

Click on the links above to download the Certificate of Non-Use of Hazardous Substances.

Additional Quality Documentation may be available, please Contact Support.

Parts & Purchasing

Part Number Pkg Code Min Temp Max Temp Status Suggested Replacement Buy Now Order Samples PDN
SPX1431M1 SOT-89-3 -55 125 OBS
SPX1431M1/TR SOT-89-3 -55 125 OBS
SPX1431M1-L SOT-89-3 -55 125 OBS SPX1431M1-L/TR
SPX1431M1-L/TR SOT-89-3 -55 125 Active Order
SPX1431M5 SOT-23-5 OBS
SPX1431M5/TR SOT-23-5 -55 125 OBS
SPX1431M5-L SOT-23-5 -55 125 OBS
SPX1431M5-L/TR SOT-23-5 -55 125 OBS
SPX1431N TO-92-3 -55 125 OBS
SPX1431N/TR TO-92-3 OBS
SPX1431N-L TO-92-3 -55 125 OBS
SPX1431N-L/TR TO-92-3 -55 125 OBS
SPX1431S NSOIC8 -55 125 OBS
SPX1431S/TR NSOIC8 -55 125 OBS
SPX1431S-L NSOIC8 -55 125 OBS
SPX1431S-L/TR NSOIC8 -55 125 OBS
Show obsolete parts
Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.


Pkg Code Details Quantities Dimensions PDF
  • JEDEC Reference: MS-012
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 128.4ºC/W (std); 96.8ºC/W (fused)
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: 98
  • Quantity per Reel: 2500
  • Quantity per Tube: 98
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 12 x 8
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 4.90
  • Width: 3.90
  • Thickness: 1.75
  • Lead Pitch: 1.27
  • JEDEC Reference: MO-178
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 191ºC/W
  • Bulk Pack Style: Canister
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 3000
  • Quantity per Tube: n/a
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 180 x 8 x 12
  • Tape & Reel Unit Orientation: 3 Pins at sprocket hole.
  • Dimensions: mm
  • Length: 2.90
  • Width: 1.60
  • Thickness: 1.45
  • Lead Pitch: 0.95
  • JEDEC Reference: TO-243
  • MSL Pb-Free: L2 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 107.1ºC/W
  • Bulk Pack Style: Canister
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 2500
  • Quantity per Tube: n/a
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 12 x 8
  • Tape & Reel Unit Orientation: Tab at sprocket hole.
  • Dimensions: mm
  • Length: 4.60 max
  • Width: 2.60 max
  • Thickness: 1.60
  • Lead Pitch: 1.50
  • JEDEC Reference: n/a
  • MSL Pb-Free: n/a
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 131.9ºC/W
  • Bulk Pack Style: Ammo
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 2000
  • Quantity per Tube: n/a
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): Ammo
  • Tape & Reel Unit Orientation: Ammopack
  • Dimensions: inch
  • Length: 0.195 max
  • Width: 0.195 max
  • Thickness: 0.155 max
  • Lead Pitch: 0.055


Distribution Date Description File
07/26/2016 Product discontinuation notification. Discontinued.
04/13/2016 Qualification of alternate assembly subcon, JCET.
04/01/2016 Qualification of alternate assembly subcon, JCET.
03/13/2014 Qualification of an alternate SOT89 package assembly site, Greatek, Taiwan, in addition to the current qualified assembly site, Cirtek, Philippines. Alternate assembly site.
07/15/2013 Package marking change. To add manufacturing date code and lot traceability.
03/23/2010 Alternate qualified assembly supplier Capacity enhancement
12/07/2009 Enhancement of NSOIC 8, NSOIC14 and NSOIC16 packages to Green (halogen-free) via Mold Compound & Die Attach Material. Enhance packages to be Green (halogen-free).
03/04/2009 Notice of Obsolescence Discontinued by Exar Corporation due to low market demand
05/16/2007 Announcing the re-activation of previously announced discontinued products. The previously announced discontinued products listed above are being re-activated due to continuing Customer demand.
02/28/2007 Product Obsolescence Letter and Discontinuation Notification. Discontinued.
02/02/2006 Announcing transfer of certain Power Management and Interface Products from Hillview fabrication facility to wafer foundary BCD. See attached Product List Power Management and Interface products as listed are being transfer to external wafer foundry, due to cessation of operations of the sipex Hillview Fabrication manufacturing site

FAQs & Support

Search our list of FAQs for answers to common technical questions.
For material content, environmental, quality and reliability questions review the Quality tab or visit our Quality page.
For ordering information and general customer service visit our Contact Us page.

Submit a Technical Support Question As a New Question

The best way to determine this is to go to maxlinear.com and type the part into the search function. At or near the top of the results you should see something that looks like:

In this example, we looked for XRA1201. Click on part number header or on the link at the bottom of the result.  This brings you to the product page. For example:


Click on Parts & Purchasing, highlighted with the blue arrow above. The screen changes to:


Notice the status column and the “Show obsolete parts” link.  A legend tells you the definition of the different statuses. Click on the “Show obsolete parts” link to see EOL or OBS part numbers along with the Active part numbers, the legend still present:


Another method to find out if a part is OBS or EOL is to click on SUPPORT at the top:


And then Product Change Notifications:


Type the part into the search, and click on one of the part numbers from the drop down menu. Then you can look for the Product Discontinuation Notice, which generally is at the top of the list, for example:


If you see this, it tells you that this particular orderable part has been discontinued and when the last order date is, or was. If you click on the file, then you can view the notice we sent about this if you purchased the part in the recent past. It may also advise of a replacement part. When an orderable part first becomes discontinued, Product Discontinuation Notices are sent are sent to those who have purchased the parts in the recent past, if purchased directly, with a dated opportunity to place a last order.