5A Low Dropout Voltage Regulator


The SPX29501/02 are 5A, highly accurate voltage regulators with a low dropout voltage of 420mV at 5A. 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. Other features include enable and error flags.

The SPX295001/02 are offered in 5-pin TO-220 and TO-263 packages. For a 1.5A version, refer to the SPX29150 datasheet. For a 3A version, refer to the SPX29300 datasheet.

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  • 5.0V and 3.3V at 150mA output
  • Accurate: 0.5% for SPX29501A
  • Very low quiescent current
  • Low dropout voltage: 300mV at 150mA
  • Extremely tight load and line regulation
  • Very low temperature coefficient
  • Current and thermal limiting


Product Brochure

Power Management Brochure


Design Tools


Pkg Code Details Quantities Dimensions PDF
  • JEDEC Reference: TS-001
  • MSL Pb-Free: n/a
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 29.3ºC/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: 0.370 max
  • Width: 0.415 max
  • Thickness: 0.190 max
  • Lead Pitch: 0.067
  • JEDEC Reference: TO-263
  • MSL Pb-Free: L3 @ 245ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 31.2ºC/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: 0.067

Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
SPX29501T5-1-8 TO-263-5 -40 125 OBS Suggested:
SPX29501T5-1-8/TR TO-263-5 -40 125 OBS Suggested:
SPX29501T5-2-5 TO-263-5 -40 125 OBS Suggested:
SPX29501T5-2-5/TR TO-263-5 -40 125 OBS Suggested:
SPX29501T5-3-3 TO-263-5 -40 125 OBS Suggested:
SPX29501T5-3-3/TR TO-263-5 -40 125 OBS Suggested:
SPX29501T5-5-0 TO-263-5 -40 125 OBS Suggested:
SPX29501T5-5-0/TR TO-263-5 -40 125 OBS Suggested:
SPX29501T5-L-1-8 TO-263-5 -40 125 OBS Suggested:
SPX29501T5-L-1-8/TR TO-263-5 -40 125 OBS Suggested:
SPX29501T5-L-2-5 TO-263-5 -40 125 OBS Suggested:
SPX29501T5-L-2-5/TR TO-263-5 -40 125 OBS Suggested:
SPX29501T5-L-3-3 TO-263-5 -40 125 OBS Suggested:
SPX29501T5-L-3-3/TR TO-263-5 -40 125 OBS
SPX29501T5-L-5-0 TO-263-5 -40 125 OBS Suggested:
SPX29501T5-L-5-0/TR TO-263-5 -40 125 OBS
SPX29501U5-1-8 TO-220-5 OBS
SPX29501U5-2-5 TO-220-5 OBS
SPX29501U5-3-3 TO-220-5 OBS
SPX29501U5-5-0 TO-220-5 OBS
SPX29501U5-L-1-8 TO-220-5 OBS
SPX29501U5-L-2-5 TO-220-5 OBS
SPX29501U5-L-3-3 TO-220-5 OBS
SPX29501U5-L-5-0 TO-220-5 -40 125 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.
Distribution Date Description File
02/27/2018 Qualification of alternate assembly subcon, JCET. PCN 18-0206-02 JCET-1033.pdf
07/11/2017 Product Discontinuation Notification PDN_17-0623-01-1033.pdf
07/26/2016 Product discontinuation notification. Discontinued. PDN 16-0626-01-1033.pdf
12/22/2015 Alternate assembly site Addition of an alternate assembly supplier Nantong Fujitsu (China). PCN 15-0728-01 Nantong Fujitsu Assy-1033.pdf
03/04/2009 Notice of Obsolescence Discontinued by Exar Corporation due to low market demand PDN_090304-01-1033.pdf
11/13/2008 Dropout Voltage Changes Transfer from Hillview Fab to Silan Fab requires relaxation of the specification to provide acceptable manufacturing yields. pcn_08-1113-01-1033.pdf
09/10/2008 Notice of Obsolescence –Selected Power Management Parts This is notification that the Power Management products listed on the attached page have been discontinued by Exar Corporation due to low market demand, effective immediately. PDN_080910-01-1033.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-06-0130-58-1033.pdf

Frequently Asked Questions

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 
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.

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