SPX2431

Precision Adjustable Shunt Regulator
Data Sheet

Description

The SPX2431 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate bandgap reference. The SPX2431 acts as an open-loop error amplifier with a 2.5V temperature compensation reference. The SPX2431’s thermal stability, wide operating current (100mA) and temperature range (0°C to 105°C) makes it suitable for a variety of applications that require a low cost, high performance solution. SPX2431A tolerance of 0.5% is proven to be sufficient to overcome all of the other errors in the system to virtually eliminate the need for trimming in the lower supply manufacturer’s assembly lines and contribute a significant cost savings.
 
The output voltage may be adjusted to any value between VREF and 20 volts with two external resistors. In the standard shunt configuration,
the combination of a low temperature coefficient, sharp turn on characteristics, low output impedance, and programmable output voltage makes this precision reference an excellent error amplifier. The SPX2431 is available in a SOT-23-3 package.

Features

  • Trimmed bandgap to 0.5% and 1.0%
  • Wide operating current 1mA to 100mA
  • Extended temperature. range: 0°C to 105°C
  • Low temperature coefficient 30 ppm/°C
  • Offered in 3-pin SOT-23 (M)
  • Replacement for TL431, AS2431
  • Low noise output

Application

  • Battery operating equipment
  • Adjustable supplies
  • Switching power supplies
  • Error amplifiers
  • Single supply amplifier
  • Monitors / VCRs / TVs
  • Personal computers

Design Tools

Symbols & Footprints

Packaging

Pkg Code Details Quantities Dimensions PDF
SOT-23-3
  • JEDEC Reference: TO-236
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: n/a
  • 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 4
  • Tape & Reel Unit Orientation: Single Pin at sprocket hole.
  • Dimensions: mm
  • Length: 2.90
  • Width: 1.30
  • Thickness: 1.12
  • Lead Pitch: 0.95
SOT-23-5
  • 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

Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
SPX2431AM SOT-23-3 0 105 OBS
SPX2431AM/TR SOT-23-3 0 105 OBS
SPX2431AM5 SOT-23-5 OBS
SPX2431AM5/TR SOT-23-5 OBS
SPX2431AM5-L SOT-23-5 OBS
SPX2431AM-L SOT-23-3 0 105 OBS Suggested:
SPX2431M-L/TR
SPX2431AM-L/TR SOT-23-3 0 105 Active Order
SPX2431M SOT-23-3 0 105 OBS
SPX2431M/TR SOT-23-3 0 105 OBS
SPX2431M5 SOT-23-5 OBS
SPX2431M5/TR SOT-23-5 OBS
SPX2431M5-L SOT-23-5 OBS
SPX2431M-L SOT-23-3 0 105 OBS Suggested:
SPX2431M-L/TR
SPX2431M-L/TR SOT-23-3 0 105 Active Order
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.

Quality Documents

Part Number REACH
SPX2431AM-L/TR Download
SPX2431M-L/TR Download
Additional Quality Documentation may be available, please contact customersupport@maxlinear.com.
Distribution Date Description File
02/16/2018 Standard tape and reel quantity will change from 2500 pieces to 3000 pieces for SOT23-3L/5L/6L. Addendum: Remove SOT-89 parts from affected products list. PCN16-1146-02A Addendum-1033.pdf
01/26/2017 Qualification of alternate assembly subcon, JCET. PCN 15-0939-02 JCET-1033.pdf
01/12/2017 Standard tape and reel quantity will change from 2500 pieces to 3000 pieces for SOT23-3L/5L/6L. PCN 16-1146-02 Reel size change-1033.pdf
07/26/2016 Product discontinuation notification. Discontinued. PDN 16-0626-01-1033.pdf
07/30/2013 Addition of an alternate qualified assembly supplier, Carsem (Malaysia) for SOT23 package using copper wire bonding. Material Change. PCN_13-0521-03a-1033.pdf
12/14/2009 Material Change. Use environmental friendly Green (halogen free) material and also for standardization. PCN_09-1109-01-1033.pdf
02/28/2007 Product Obsolescence Letter and Discontinuation Notification. Discontinued. POL_022807-1033.pdf
02/02/2006 Announcing transfer of certain Power Management and Interface Products from Hillview fabrication and facility to wafer foundary Silan. 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 PCN-06-0130-42-1033.pdf
01/17/2006 Announcing discontinuance of certain low volume Power Management and Interface Products and last dates to place lifetime. buy orders Low Volume Power Management and Interface products are being discontinued due to cessation of operations of the Sipex Hillview Fabrication manufacturing site. PCN-06-0117-01-1033.pdf
12/22/2004 Sipex has qualified CET to perform assembly operation fot the SOT23 -3 L package. Some of the CET SOT23 3 L pkg. dimensions are slightly different than the Jedec To-236 Variation AB std. Improve manufacturability PCN-04-1222-01-1033.pdf

Frequently Asked Questions

The best way to determine this is to go to exar.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. When you hover over it, it will turn grey and you can click anywhere in the grey box. This brings you to the product page. For example:

 
 

Click on Parts & Purchasing, highlighted in yellow 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:

 
 

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

 

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.