SPX2431

Precision Adjustable Shunt Regulator
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Overview

Information Precision Adjustable Shunt Regulator
Reference Voltage Adjustable, Fixed
VOUT (V) -
VOUT Adj MIN (V) 2.5
VOUT Adj MAX (V) 20
Operating Current (MAX) (mA) 100
Operating Current (MIN) (mA) 1
IQ (µA) 1000
Initial Accuracy (%) 0.5, 1
IREF (µA) 0.7
Temperature Coefficient (ppm/°C) 30
Temperature Range (°C) 0 to 105
Package SOT23-3
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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.

  • 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

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

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets SPX2431 Precision Adjustable Shunt Regulator 1A November 2017 410.6 KB
Application Notes AN200, Downloading and Installing CAD Symbols and Footprints with Ultra Librarian April 2019 1.2 MB
Product Brochures Power Management Brochure October 2020 2.4 MB
Symbols & Footprints SPX2431AM-L/TR CAD File (.bxl) September 2018 65.9 KB
Symbols & Footprints SPX2431M-L/TR CAD File (.bxl) September 2018 65.9 KB
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
SPX2431AM-L/TR N Y Y Y Y L1 / 260ᵒC SOT-23-3
SPX2431M-L/TR N Y Y Y Y L1 / 260ᵒC SOT-23-3

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
SPX2431AM SOT-23-3 0 105 OBS
SPX2431AM-L SOT-23-3 0 105 OBS SPX2431M-L/TR
SPX2431AM-L/TR SOT-23-3 0 105 Active Order
SPX2431AM/TR SOT-23-3 0 105 OBS
SPX2431AM5 SOT-23-5 OBS
SPX2431AM5-L SOT-23-5 OBS
SPX2431AM5/TR SOT-23-5 OBS
SPX2431M SOT-23-3 0 105 OBS
SPX2431M-L SOT-23-3 0 105 OBS SPX2431M-L/TR
SPX2431M-L/TR SOT-23-3 0 105 Active Order
SPX2431M/TR SOT-23-3 0 105 OBS
SPX2431M5 SOT-23-5 OBS
SPX2431M5-L SOT-23-5 OBS
SPX2431M5/TR SOT-23-5 OBS
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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.

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

Notifications

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.
01/26/2017 Qualification of alternate assembly subcon, JCET.
01/12/2017 Standard tape and reel quantity will change from 2500 pieces to 3000 pieces for SOT23-3L/5L/6L.
07/26/2016 Product discontinuation notification. Discontinued.
07/30/2013 Addition of an alternate qualified assembly supplier, Carsem (Malaysia) for SOT23 package using copper wire bonding. Material Change.
12/14/2009 Material Change. Use environmental friendly Green (halogen free) material and also for standardization.
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 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
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.
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

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