150mA Low-Noise LDO Voltage Regulator
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Information 150mA Low-Noise LDO Voltage Regulator
Output Option Adjustable, Fixed
VOUT (V) 1.8, 3.0, 3.3, 5.0, Adj
VOUT Adj MIN (V) 1.24
VOUT Adj MAX (V) 15.725
IOUT (mA) 150
VIN MIN (V) 2.5
VIN MAX (V) 16
IQ (µA) 70
Accuracy (%) 1%
Vdrop (mV) 210
Output Noise (µVRMS) 40
PSRR (dB) 70
Junction Temp Range (°C) -40 to 125
Package SOT23-5
Features Reverse battery protection,Current limit and thermal protection
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The SPX5205 is a positive voltage regulator with very low dropout voltage, output noise and ground current (750μA at 100mA). VOUT has a tolerance of less than 1% and is temperature compensated. Fixed output voltages 1.2V, 1.8V, 2.5V, 2.8V, 3.0V, 3.3V, and 5.0V and an adjustable version are available in a small 5-pin SOT-23 package. Other key features include zero off-mode current, reverse battery protection, thermal shutdown and current limit. The SPX5205 is an excellent choice for use in battery powered applications and where power conservation is desired, such as cellular/cordless telephones, radio control systems and portable computers.

  • Low noise output LDO: 40µVRMS possible
  • 1% initial accuracy
  • Very low quiescent current: 70µA
  • Low dropout voltage (210mV at 150mA)
  • Current and thermal limiting
  • Reverse battery protection
  • Wide range of fixed output voltages:1.2V, 1.8V, 2.5V, 3.0V, 3.3V and 5.0V
  • Zero off-mode current
  • Small 5-pin SOT-23
  • Pin compatible to MIC5205 / MAX8877 (fixed options only) and AS3815

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets SPX5205 150mA, Low-Noise LDO Voltage Regulator L September 2018 383.5 KB
Application Notes AN200, Downloading and Installing CAD Symbols and Footprints with Ultra Librarian April 2019 1.2 MB
Product Flyers Power Management & Interface Products for Cable, Satellite and IP STB/Home Gateway March 2018 2 MB
Product Brochures Power Management Brochure October 2020 2.4 MB
Product FAQs SPX5205 FAQ 1.0.0 September 2006 181.6 KB
Symbols & Footprints SPX5205M5-L/TR CAD File (.bxl) September 2018 82.2 KB
Symbols & Footprints SPX5205M5-L-1-8/TR CAD File (.bxl) September 2018 81.7 KB
Symbols & Footprints SPX5205M5-L-3-0/TR CAD File (.bxl) September 2018 81.7 KB
Symbols & Footprints SPX5205M5-L-3-3/TR CAD File (.bxl) September 2018 82.2 KB
Symbols & Footprints SPX5205M5-L-5-0/TR CAD File (.bxl) September 2018 82.2 KB
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
SPX5205M5-L-1-8/TR N Y Y Y Y L1 / 260ᵒC SOT-23-5
SPX5205M5-L-3-3/TR N Y Y Y Y L1 / 260ᵒC SOT-23-5
SPX5205M5-L-5-0/TR N Y Y Y Y L1 / 260ᵒC SOT-23-5
SPX5205M5-L/TR N Y Y Y Y L1 / 260ᵒC SOT-23-5
SPX5205M5-L-3-0/TR N Y Y Y Y L1 / 260ᵒC SOT-23-5

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
SPX5205M5 SOT-23-5 -40 125 OBS
SPX5205M5-1-2 SOT-23-5 -40 125 OBS
SPX5205M5-1-2/TR SOT-23-5 -40 125 OBS
SPX5205M5-1-5 SOT-23-5 -40 125 OBS
SPX5205M5-1-5/TR SOT-23-5 -40 125 OBS
SPX5205M5-1-8 SOT-23-5 -40 125 OBS
SPX5205M5-1-8/TR SOT-23-5 -40 125 OBS
SPX5205M5-2-0 SOT-23-5 -40 125 OBS
SPX5205M5-2-0/TR SOT-23-5 -40 125 OBS
SPX5205M5-2-5 SOT-23-5 -40 125 OBS
SPX5205M5-2-5/TR SOT-23-5 -40 125 OBS
SPX5205M5-2-8 SOT-23-5 -40 125 OBS
SPX5205M5-2-8/TR SOT-23-5 -40 125 OBS
SPX5205M5-3-0 SOT-23-5 -40 125 OBS
SPX5205M5-3-0/TR SOT-23-5 -40 125 OBS
SPX5205M5-3-3 SOT-23-5 -40 125 OBS
SPX5205M5-3-3/TR SOT-23-5 -40 125 OBS
SPX5205M5-5-0 SOT-23-5 -40 125 OBS
SPX5205M5-5-0/TR SOT-23-5 -40 125 OBS
SPX5205M5-L SOT-23-5 -40 125 OBS SPX5205M5-L/TR
SPX5205M5-L-1-2 SOT-23-5 -40 125 OBS SPX5205M5-L-1-2/TR
SPX5205M5-L-1-2/TR SOT-23-5 -40 125 OBS SPX3819M5-L-1-2/TR
SPX5205M5-L-1-5 SOT-23-5 -40 125 OBS SPX5205M5-L
SPX5205M5-L-1-5/TR SOT-23-5 -40 125 OBS SPX5205M5-L/TR
SPX5205M5-L-1-8 SOT-23-5 -40 125 OBS SPX5205M5-L-1-8/TR
SPX5205M5-L-1-8/TR SOT-23-5 -40 125 Active Order
SPX5205M5-L-2-0 SOT-23-5 -40 125 OBS
SPX5205M5-L-2-0/TR SOT-23-5 -40 125 OBS
SPX5205M5-L-2-5 SOT-23-5 -40 125 OBS SPX5205M5-L-2-5/TR
SPX5205M5-L-2-5/TR SOT-23-5 -40 125 OBS SPX3819M5-L-2-5/TR
SPX5205M5-L-2-8 SOT-23-5 -40 125 OBS SPX5205M5-L
SPX5205M5-L-2-8/TR SOT-23-5 -40 125 OBS SPX5205M5-L/TR
SPX5205M5-L-3-0 SOT-23-5 -40 125 OBS SPX5205M5-L-3-0/TR
SPX5205M5-L-3-0/TR SOT-23-5 -40 125 Active Order
SPX5205M5-L-3-3 SOT-23-5 -40 125 OBS SPX5205M5-L-3-3/TR
SPX5205M5-L-3-3/TR SOT-23-5 -40 125 Active Order
SPX5205M5-L-5-0 SOT-23-5 -40 125 OBS SPX5205M5-L-5-0/TR
SPX5205M5-L-5-0/TR SOT-23-5 -40 125 Active Order
SPX5205M5-L/TR SOT-23-5 -40 125 Active Order
SPX5205M5/TR SOT-23-5 -40 125 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.


Pkg Code Details Quantities Dimensions PDF
  • 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


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.
07/11/2017 Product Discontinuation Notification
01/12/2017 Standard tape and reel quantity will change from 2500 pieces to 3000 pieces for SOT23-3L/5L/6L.
01/05/2017 Qualification of alternate assembly subcon, JCET.
07/26/2016 Product discontinuation notification. Discontinued.
02/11/2016 Alternate assembly site and datasheet change. Addition of an alternate assembly supplier JCET. Bottom mark has been eliminated and top mark changed: added date code (YW) information.
08/21/2015 Product discontinuation notification
12/04/2014 Packing/Shipping & Alternate Assembly Site Changes. Addition of JCET, for assembly using copper wire or gold wire bonding and standard reel quantity changing from 2500 to 3000 pieces.
10/23/2014 Datasheet & Package Top Mark Changes. Eliminated bottom mark. Changed Top Mark. Added date code (WW) information to Top Mark.
07/30/2013 Addition of an alternate qualified assembly supplier, Carsem (Malaysia) for SOT23 package using copper wire bonding. Material Change.
03/04/2009 Notice of Obsolescence Discontinued by Exar Corporation due to low market demand
08/12/2008 Datasheet Change: Load & Line Regulations Product Re-Characterization
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

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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