150mA Low-Noise LDO Voltage Regulator


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.

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  • 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



Design Tools


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: 1.15
  • Lead Pitch: 0.95

Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
SPX5205M5 SOT-23-5 -40 125 OBS
SPX5205M5/TR 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 Suggested:
SPX5205M5-L/TR SOT-23-5 -40 125 Active
SPX5205M5-L-1-2 SOT-23-5 -40 125 OBS Suggested:
SPX5205M5-L-1-2/TR SOT-23-5 -40 125 EOL Suggested:
SPX5205M5-L-1-5 SOT-23-5 -40 125 OBS Suggested:
SPX5205M5-L-1-5/TR SOT-23-5 -40 125 OBS Suggested:
SPX5205M5-L-1-8 SOT-23-5 -40 125 OBS Suggested:
SPX5205M5-L-1-8/TR SOT-23-5 -40 125 Active
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 Suggested:
SPX5205M5-L-2-5/TR SOT-23-5 -40 125 EOL Suggested:
SPX5205M5-L-2-8 SOT-23-5 -40 125 OBS Suggested:
SPX5205M5-L-2-8/TR SOT-23-5 -40 125 OBS Suggested:
SPX5205M5-L-3-0 SOT-23-5 -40 125 OBS Suggested:
SPX5205M5-L-3-0/TR SOT-23-5 -40 125 Active
SPX5205M5-L-3-3 SOT-23-5 -40 125 OBS Suggested:
SPX5205M5-L-3-3/TR SOT-23-5 -40 125 Active
SPX5205M5-L-5-0 SOT-23-5 -40 125 OBS Suggested:
SPX5205M5-L-5-0/TR SOT-23-5 -40 125 Active
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
07/11/2017 Product Discontinuation Notification PDN_17-0623-01-1033.pdf
01/12/2017 Standard tape and reel quantity will change from 2500 pieces to 3000 pieces for SOT23-3L/5L/6L. PCN 16-1146-02 Reel size change-1033.pdf
01/05/2017 Qualification of alternate assembly subcon, JCET. PCN 16-0313-01 JCET-1033.pdf
07/26/2016 Product discontinuation notification. Discontinued. PDN 16-0626-01-1033.pdf
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. PCN 16-0103-02-1033.PDF
08/21/2015 Product discontinuation notification PDN_15-0729-03-1033.pdf
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. PCN_13-1146-02-02-1033.pdf
10/23/2014 Datasheet & Package Top Mark Changes. Eliminated bottom mark. Changed Top Mark. Added date code (WW) information to Top Mark. PCN_14-0727-03-1033.pdf
07/30/2013 Addition of an alternate qualified assembly supplier, Carsem (Malaysia) for SOT23 package using copper wire bonding. Material Change. PCN_13-0521-03a-1033.pdf
03/04/2009 Notice of Obsolescence Discontinued by Exar Corporation due to low market demand PDN_090304-01-1033.pdf
08/12/2008 Datasheet Change: Load & Line Regulations Product Re-Characterization pcn_08-0812-03_spx5205-1033.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-06-0130-57-1033.pdf