500mA Alkaline DC/DC Boost Regulator
Data Sheet



  • Ultra Low Quiescent Current: 10uA
  • Wide Input Voltage Range: 0.9V to 4.5V
  • 90mA IOUT at 1.3V Input 3.3V output (SP6641AEK-3-3)
  • 100mA IOUT at 2.0V Input 5.0V output (SP6641AEK-5-0)
  • 500mA IOUT at 2.6 Input 3.3V output (SP6641BEK-3-3)
  • 500mA IOUT at 3.3V Input 5.0V output (SP6641BEK-5-0)
  • Current Limit Protection
  • Thermal Shutdown Protection with Hysteresis
  • Auxiliary Supply Control
  • Internal 0.3Ω NFET Switch Eliminates External FETs
  • Kelvin Connection with 3.3V Feedback


Design Tools

Symbols & Footprints


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

Parts & Purchasing

Part Number Pkg Code Min Temp Max Temp Status Buy Now Order Samples
SP6641AEK SOT-23-5 -40 85 OBS
SP6641AEK/TR SOT-23-5 -40 85 OBS
SP6641AEK-3-3 SOT-23-5 -40 85 OBS
SP6641AEK-3-3/TR SOT-23-5 -40 85 OBS Suggested:
SP6641AEK-5-0 SOT-23-5 -40 85 OBS
SP6641AEK-5-0/TR SOT-23-5 -40 85 OBS Suggested:
SP6641AEK-L-3-3 SOT-23-5 -40 85 OBS Suggested:
SP6641AEK-L-3-3/TR SOT-23-5 -40 85 Active Order
SP6641AEK-L-5-0 SOT-23-5 -40 85 OBS
SP6641AEK-L-5-0/TR SOT-23-5 -40 85 Active Order
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.

Quality & Environmental Data

Part Number RoHS | Exempt RoHS Halogen Free REACH MSL Rating / Peak Reflow Package
SP6641AEK-L-3-3/TR N Y Y Y L1 / 260ᵒC SOT-23-5
SP6641AEK-L-5-0/TR N 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.
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.
01/30/2017 Qualification of alternate assembly subcon, JCET.
01/12/2017 Standard tape and reel quantity will change from 2500 pieces to 3000 pieces for SOT23-3L/5L/6L.
07/26/2016 Product discontinuation notification. Discontinued.
07/30/2013 Addition of an alternate qualified assembly supplier, Carsem (Malaysia) for SOT23 package using copper wire bonding. Material Change.
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.
02/28/2007 Product Obsolescence Letter and Discontinuation Notification. Discontinued.


Search our list of FAQs for answers to common technical questions.
For material content, environmental, quality and reliability questions review the Quality tab or visit our Quality page.
For ordering information and general customer service visit our Contact Us page.

Frequently Asked Questions

The best way to determine this is to go to maxlinear.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. Click on part number header or on the link at the bottom of the result.  This brings you to the product page. For example:


Click on Parts & Purchasing, highlighted with the blue arrow 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, the legend still present:


Another method to find out if a part is OBS or EOL is to click on SUPPORT at the top:


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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