3A High Current, Low Dropout Voltage Regulator
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Information 3A High Current, Low Dropout Voltage Regulator
Output Option Fixed
VOUT (V) 2.5, 3.3, 5.0
VOUT Adj MIN (V) -
VOUT Adj MAX (V) -
IOUT (mA) 3000
VIN MIN (V) 2.8
VIN MAX (V) 16
IQ (µA) 37000
Accuracy (%) 1%
Vdrop (mV) 600
Output Noise (µVRMS) 260
PSRR (dB) -
Junction Temp Range (°C) -40 to 125
Package TO263-3
Features Current limit and thermal protection,Reverse battery protection
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The SPX29300/01/02 are 3A, highly accurate voltage regulators with a low dropout voltage of 600mV (typical) at 3A. 

These regulators are specifically designed for low voltage applications that require a low dropout voltage and a fast transient response. They are fully fault protected against overcurrent, reverse battery and positive and negative voltage transients. On-Chip trimming adjusts the reference voltage to 1% initial accuracy.

The SPX29300 is offered in a 3-pin TO-263 package, the SPX29301 is offered in a 5-pin TO-263 while the SPX29302 is offered in a 5-pin TO-263 and 5-pin TO-220 package.

  • Adjustable output down to 1.25V
  • 1% output accuracy
  • Output current of 3A
  • Low dropout voltage of 450mV @ 3A
  • Extremely tight load and line regulation
  • Extremely fast transient response
  • Reverse battery protection
  • Zero current shutdown (5-pin version)
  • Error flag signal output for out of regulation state (5-pin version)

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets 3A Low Dropout Voltage Regulator Data Sheet 2.2.3 May 2022 1.7 MB
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
Product FAQs SPX29300 FAQ 1.0.0 October 2006 169.6 KB
Symbols & Footprints SPX29300T-L-2-5/TR CAD File (.bxl) September 2018 18.1 KB
Symbols & Footprints SPX29300T-L-3-3/TR CAD File (.bxl) September 2018 18.1 KB
Symbols & Footprints SPX29300T-L-5-0/TR CAD File (.bxl) September 2018 18.1 KB
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
SPX29300T-L-2-5/TR N Y Y Y Y L3 / 245ᵒC TO-263-3
SPX29300T-L-3-3/TR N Y Y Y Y L3 / 245ᵒC TO-263-3
SPX29300T-L-5-0/TR N Y Y Y Y L3 / 245ᵒC TO-263-3

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
SPX29300T-1-8 TO-263-3 -40 125 OBS
SPX29300T-1-8/TR TO-263-3 -40 125 OBS
SPX29300T-2-5 TO-263-3 -40 125 OBS
SPX29300T-2-5/TR TO-263-3 OBS
SPX29300T-3-3 TO-263-3 -40 125 OBS
SPX29300T-3-3/TR TO-263-3 OBS
SPX29300T-5-0 TO-263-3 -40 125 OBS
SPX29300T-5-0/TR TO-263-3 OBS
SPX29300T-L-1-8 TO-263-3 -40 125 OBS SPX29300T-L-1-8/TR
SPX29300T-L-1-8/TR TO-263-3 -40 125 OBS
SPX29300T-L-2-5 TO-263-3 -40 125 OBS SPX29300T-L-2-5/TR
SPX29300T-L-2-5/TR TO-263-3 -40 125 Active Order
SPX29300T-L-3-3 TO-263-3 -40 125 OBS SPX29300T-L-3-3/TR
SPX29300T-L-3-3/TR TO-263-3 -40 125 Active Order
SPX29300T-L-5-0 TO-263-3 -40 125 OBS SPX29300T-L-5-0/TR
SPX29300T-L-5-0/TR TO-263-3 -40 125 Active Order
SPX29300U-1-8 TO-220-3 -40 125 OBS
SPX29300U-2-5 TO-220-3 -40 125 OBS
SPX29300U-3-0 TO-220-3 OBS
SPX29300U-3-3 TO-220-3 -40 125 OBS
SPX29300U-5-0 TO-220-3 -40 125 OBS
SPX29300U-L-1-8 TO-220-3 -40 125 OBS SPX29302U5-L
SPX29300U-L-2-5 TO-220-3 -40 125 OBS SPX29302U5-L
SPX29300U-L-3-3 TO-220-3 -40 125 OBS SPX29302U5-L
SPX29300U-L-5-0 TO-220-3 -40 125 OBS SPX29302U5-L
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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.


Pkg Code Details Quantities Dimensions PDF
  • JEDEC Reference: TO-220
  • MSL Pb-Free: n/a
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 29.4ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: n/a
  • Quantity per Tube: 50
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): n/a
  • Tape & Reel Unit Orientation: n/a
  • Dimensions: inch
  • Length: 0.355 max
  • Width: 0.420 max
  • Thickness: 0.190 max
  • Lead Pitch: 0.10
  • JEDEC Reference: TO-263
  • MSL Pb-Free: L3 @ 245ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 31.4ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 500
  • Quantity per Tube: 50
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 24 x 16
  • Tape & Reel Unit Orientation: Tab away from sprocket hole.
  • Dimensions: inch
  • Length: 0.380 max
  • Width: 0.420 max
  • Thickness: 0.190
  • Lead Pitch: 0.10


Distribution Date Description File
07/11/2017 Product Discontinuation Notification
08/16/2016 Addition of an alternate qualified location, JCET.
07/26/2016 Product discontinuation notification. Discontinued.
02/05/2016 Alternate assembly site. Addition of an alternate assembly supplier Nantong Fujitsu (China)
05/09/2011 Revised two mask layers. To improve the manufacturing control margin.
04/30/2010 Design and datasheet change. To improve product performance.
03/04/2009 Notice of Obsolescence Discontinued by Exar Corporation due to low market demand
02/28/2007 Product Obsolescence Letter and Discontinuation Notification. Discontinued.

FAQs & Support

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Yes. Try our Excel-based heat calculation spreadsheet ANP-03, Thermal Calculator
For further study, this spreadsheet is mentioned in the following helpful application note: ANP-02, Thermal Considerations for Linear Regulators 

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