3A Low Dropout Voltage Regulator
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Information 3A Low Dropout Voltage Regulator
Output Option Adjustable, Fixed
VOUT (V) 3.3, Adj
VOUT Adj MIN (V) 1.25
VOUT Adj MAX (V) 15
IOUT (mA) 3000
VIN MIN (V) 2.5
VIN MAX (V) 10
IQ (µA) 4000
Accuracy (%) 1%, 2%
Vdrop (mV) 1100
Output Noise (µVRMS) 0.03% of VOUT
PSRR (dB) 75
Junction Temp Range (°C) -40 to 125
Package TO263-3
Features Current limit and thermal protection
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The SPX1587 is a low power positive-voltage regulator designed to satisfy moderate power requirements with a cost effective, small footprint solution.

This device is an excellent choice for use in battery powered applications and portable computers. The SPX1587 features very low quiescent current and a low dropout voltage of 1.1V at a full load. As output current decreases, quiescent current flows into the load, increasing efficiency. The SPX1587 is available in adjustable or fixed 1.5V, 2.5V, 3.3V and 5.0V output voltages.

The SPX1587 is offered in several 3-pin surface mount packages: TO-252, TO-220 and TO-263. A 10μF ceramic or tantalum output capacitor provides unconditional stability.

  • Guaranteed 3A output current
  • Three terminal adjustable or fixed
  • 1.5V,  2.5V, 3.3V and 5.0V
  • Low quiescent current
  • Low dropout voltage: 1.1V at 3A
  • Line regulation: 0.1%
  • Load regulation: 0.1%
  • Stable with 10uF ceramic capacitor
  • Overcurrent and thermal protection
  • Available packages: TO252, TO220 and TO263
  • Similar to industry standard LT1085/ LT1585

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets SPX1587 3A Low Dropout Voltage Regulator 2.0.1 June 2023 694.1 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 SPX1587AT-L/TR CAD File (.bxl) September 2018 18.1 KB
Symbols & Footprints SPX1587AT-L-3-3/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
SPX1587AT-L-3-3/TR N Y Y Y Y L3 / 245ᵒC TO-263-3
SPX1587AT-L/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
SPX1587AR TO-252-3 -40 125 OBS
SPX1587AR-1-5 TO-252-3 -40 125 OBS
SPX1587AR-1-5/TR TO-252-3 OBS
SPX1587AR-1-8 TO-252-3 OBS
SPX1587AR-1-8/TR TO-252-3 OBS
SPX1587AR-2-5/TR TO-252-3 OBS
SPX1587AR-3-3 TO-252-3 -40 125 OBS
SPX1587AR-3-3/TR TO-252-3 -40 125 OBS
SPX1587AR-5-0/TR TO-252-3 OBS
SPX1587AR-L TO-252-3 -40 125 OBS SPX1587AR-L/TR
SPX1587AR-L-1-5 TO-252-3 -40 125 OBS SPX1587AR-L
SPX1587AR-L-1-5/TR TO-252-3 -40 125 OBS SPX1587AR-L/TR
SPX1587AR-L-1-8 TO-252-3 -40 125 OBS SPX1587AR-L
SPX1587AR-L-1-8/TR TO-252-3 -40 125 OBS SPX1587AR-L/TR
SPX1587AR-L-2-5 TO-252-3 -40 125 OBS SPX1587AR-L
SPX1587AR-L-2-5/TR TO-252-3 -40 125 OBS SPX1587AR-L/TR
SPX1587AR-L-3-0 TO-252-3 -40 125 OBS
SPX1587AR-L-3-0/TR TO-252-3 -40 125 OBS
SPX1587AR-L-3-3 TO-252-3 -40 125 OBS SPX1587AR-L
SPX1587AR-L-3-3/TR TO-252-3 -40 125 OBS SPX1587AR-L/TR
SPX1587AR-L-5-0 TO-252-3 -40 125 OBS SPX1587AR-L
SPX1587AR-L-5-0/TR TO-252-3 -40 125 OBS SPX1587AR-L/TR
SPX1587AR-L/TR TO-252-3 -40 125 OBS SPX1587AT-L/TR
SPX1587AR/TR TO-252-3 -40 125 OBS
SPX1587AT-1-5 TO-263-3 OBS
SPX1587AT-1-8/TR TO-263-3 OBS
SPX1587AT-2-5 TO-263-3 -40 125 OBS
SPX1587AT-2-5/TR TO-263-3 -40 125 OBS Order
SPX1587AT-2-8 TO-263-3 OBS
SPX1587AT-2-8/TR TO-263-3 OBS
SPX1587AT-2-85 TO-263-3 OBS
SPX1587AT-2-85/TR TO-263-3 OBS
SPX1587AT-3-3 TO-263-3 -40 125 OBS
SPX1587AT-3-3/TR TO-263-3 -40 125 OBS
SPX1587AT-5-0/TR TO-263-3 OBS
SPX1587AT-L TO-263-3 -40 125 OBS SPX1587AT-L/TR
SPX1587AT-L-1-5 TO-263-3 -40 125 OBS SPX1587AT-L
SPX1587AT-L-1-5/TR TO-263-3 -40 125 OBS SPX1587AT-L/TR
SPX1587AT-L-1-8 TO-263-3 -40 125 OBS SPX1587AT-L
SPX1587AT-L-1-8/TR TO-263-3 -40 125 OBS SPX1587AT-L/TR
SPX1587AT-L-2-5 TO-263-3 -40 125 OBS SPX1587AT-2-5/TR
SPX1587AT-L-2-5/TR TO-263-3 -40 125 OBS SPX1587AT-L/TR
SPX1587AT-L-2-8 TO-263-3 -40 125 OBS SPX1587AT-L
SPX1587AT-L-2-8/TR TO-263-3 -40 125 OBS SPX1587AT-L/TR
SPX1587AT-L-2-85 TO-263-3 -40 125 OBS SPX1587AT-L
SPX1587AT-L-2-85/TR TO-263-3 -40 125 OBS SPX1587AT-L/TR
SPX1587AT-L-3-0 TO-263-3 -40 125 OBS
SPX1587AT-L-3-0/TR TO-263-3 -40 125 OBS
SPX1587AT-L-3-3 TO-263-3 -40 125 OBS SPX1587AT-L-3-3/TR
SPX1587AT-L-3-3/TR TO-263-3 -40 125 Active Order
SPX1587AT-L-5-0 TO-263-3 -40 125 OBS SPX1587AT-L
SPX1587AT-L-5-0/TR TO-263-3 -40 125 OBS SPX1587AT-L/TR
SPX1587AT-L/TR TO-263-3 -40 125 Active Order
SPX1587AU-1-8 TO-220-3 OBS
SPX1587AU-2-5 TO-220-3 -40 125 OBS
SPX1587AU-2-8 TO-220-3 OBS
SPX1587AU-2-85 TO-220-3 OBS
SPX1587AU-L TO-220-3 -40 125 OBS SPX1587AT-L
SPX1587AU-L-1-5 TO-220-3 -40 125 OBS SPX1587AU-L
SPX1587AU-L-1-8 TO-220-3 -40 125 OBS SPX1587AU-L
SPX1587AU-L-2-5 TO-220-3 -40 125 OBS SPX1587AU-L
SPX1587AU-L-2-8 TO-220-3 -40 125 OBS SPX1587AU-L
SPX1587AU-L-2-85 TO-220-3 -40 125 OBS SPX1587AU-L
SPX1587AU-L-3-0 TO-220-3 -40 125 OBS
SPX1587AU-L-3-3 TO-220-3 -40 125 OBS SPX1587AU-L
SPX1587AU-L-5-0 TO-220-3 -40 125 OBS SPX1587AU-L
SPX1587AU-L/TR TO-220-3 -40 125 OBS
SPX1587R TO-252-3 -40 125 OBS
SPX1587R-1-5 TO-252-3 OBS
SPX1587R-1-5/TR TO-252-3 OBS
SPX1587R-1-8 TO-252-3 OBS
SPX1587R-1-8/TR TO-252-3 OBS
SPX1587R-2-5 TO-252-3 OBS
SPX1587R-2-5/TR TO-252-3 OBS
SPX1587R-3-3 TO-252-3 OBS
SPX1587R-3-3/TR TO-252-3 OBS
SPX1587R-5-0 TO-252-3 OBS
SPX1587R-5-0/TR TO-252-3 OBS
SPX1587R-L TO-252-3 -40 125 OBS SPX1587AR-L
SPX1587R-L-1-5 TO-252-3 -40 125 OBS SPX1587AR-L
SPX1587R-L-1-5/TR TO-252-3 -40 125 OBS SPX1587AR-L/TR
SPX1587R-L-1-8 TO-252-3 -40 125 OBS SPX1587AR-L
SPX1587R-L-1-8/TR TO-252-3 -40 125 OBS SPX1587AR-L/TR
SPX1587R-L-2-5 TO-252-3 -40 125 OBS SPX1587AR-L
SPX1587R-L-2-5/TR TO-252-3 -40 125 OBS SPX1587AR-L/TR
SPX1587R-L-3-0 TO-252-3 -40 125 OBS
SPX1587R-L-3-0/TR TO-252-3 -40 125 OBS
SPX1587R-L-3-3 TO-252-3 -40 125 OBS SPX1587AR-L
SPX1587R-L-3-3/TR TO-252-3 -40 125 OBS SPX1587AR-L/TR
SPX1587R-L-5-0 TO-252-3 -40 125 OBS SPX1587AR-L
SPX1587R-L-5-0/TR TO-252-3 -40 125 OBS SPX1587AR-L/TR
SPX1587R-L/TR TO-252-3 -40 125 OBS SPX1587AR-L/TR
SPX1587R/TR TO-252-3 OBS
SPX1587T TO-263-3 OBS
SPX1587T-1-5/TR TO-263-3 OBS
SPX1587T-1-8 TO-263-3 OBS
SPX1587T-1-8/TR TO-263-3 OBS
SPX1587T-2-5 TO-263-3 -40 125 OBS
SPX1587T-2-5/TR TO-263-3 -40 125 OBS
SPX1587T-2-8 TO-263-3 OBS
SPX1587T-2-8/TR TO-263-3 OBS
SPX1587T-2-85 TO-263-3 OBS
SPX1587T-2-85/TR TO-263-3 OBS
SPX1587T-3-3/TR TO-263-3 -40 125 OBS
SPX1587T-5-0 TO-263-3 OBS
SPX1587T-5-0/TR TO-263-3 OBS
SPX1587T-L TO-263-3 -40 125 OBS SPX1587AT-L/TR
SPX1587T-L-1-5 TO-263-3 -40 125 OBS SPX1587AT-L/TR
SPX1587T-L-1-5/TR TO-263-3 -40 125 OBS SPX1587AT-L/TR
SPX1587T-L-1-8 TO-263-3 -40 125 OBS SPX1587T-L
SPX1587T-L-1-8/TR TO-263-3 -40 125 OBS SPX1587T-L/TR
SPX1587T-L-2-5 TO-263-3 -40 125 OBS SPX1587T-L
SPX1587T-L-2-5/TR TO-263-3 -40 125 OBS SPX1587T-L/TR
SPX1587T-L-2-8 TO-263-3 -40 125 OBS SPX1587T-L
SPX1587T-L-2-8/TR TO-263-3 -40 125 OBS SPX1587T-L/TR
SPX1587T-L-2-85 TO-263-3 -40 125 OBS SPX1587T-L
SPX1587T-L-2-85/TR TO-263-3 -40 125 OBS SPX1587T-L/TR
SPX1587T-L-3-0 TO-263-3 -40 125 OBS
SPX1587T-L-3-0/TR TO-263-3 -40 125 OBS
SPX1587T-L-3-3 TO-263-3 -40 125 OBS SPX1587T-L
SPX1587T-L-3-3/TR TO-263-3 -40 125 OBS SPX1587T-L/TR
SPX1587T-L-5-0 TO-263-3 -40 125 OBS SPX1587AT-L/TR
SPX1587T-L-5-0/TR TO-263-3 -40 125 OBS SPX1587AT-L/TR
SPX1587T-L/TR TO-263-3 -40 125 OBS SPX1587AT-L/TR
SPX1587T/TR TO-263-3 -40 125 OBS
SPX1587U TO-220-3 OBS
SPX1587U-1-5 TO-220-3 OBS
SPX1587U-1-8 TO-220-3 OBS
SPX1587U-2-5 TO-220-3 OBS
SPX1587U-2-8 TO-220-3 OBS
SPX1587U-2-85 TO-220-3 OBS
SPX1587U-3-3 TO-220-3 -40 125 OBS
SPX1587U-5-0 TO-220-3 OBS
SPX1587U-L TO-220-3 -40 125 OBS SPX1587AU-L
SPX1587U-L-1-5 TO-220-3 -40 125 OBS SPX1587AU-L
SPX1587U-L-1-8 TO-220-3 -40 125 OBS SPX1587AU-L
SPX1587U-L-2-5 TO-220-3 -40 125 OBS SPX1587AU-L
SPX1587U-L-2-8 TO-220-3 -40 125 OBS SPX1587AU-L
SPX1587U-L-2-85 TO-220-3 -40 125 OBS SPX1587AU-L
SPX1587U-L-3-0 TO-220-3 -40 125 OBS
SPX1587U-L-3-3 TO-220-3 -40 125 OBS 3 SPX1587AT-L-3-3
SPX1587U-L-5-0 TO-220-3 -40 125 OBS SPX1587AT-L-2-5
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: 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-252
  • MSL Pb-Free: L2 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 50ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 2000
  • Quantity per Tube: 80
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 16 x 8
  • Tape & Reel Unit Orientation: Tab at sprocket hole.
  • Dimensions: inch
  • Length: 0.24
  • Width: 0.265 max
  • Thickness: 0.094 max
  • Lead Pitch: 0.09
  • 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
02/27/2018 Qualification of alternate assembly subcon, JCET.
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)
01/13/2016 Product discontinuation notice
09/11/2015 Updated information subsequent to original published PCN 13-1043-01 on 10/28/2014 Products listed in 3L TO-252 package have been improved to MSL2 at the same production site
10/28/2014 Alternate Assembly Site. Qualification of an alternate production site, Greatek, Taiwan for 3L TO-252 (MSL3, 260C).
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.
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

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