800mA 1.5MHz Synchronous Step-Down Converter
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Information 800mA 1.5MHz Synchronous Step-Down Converter
# of Outputs 1
IOUT (A) 0.8
VIN MIN (V) 2.5
VIN MAX (V) 5.5
IQ (µA) 30
VOUT MIN (V) 0.6
Frequency (kHz) 1500
Accuracy (%) 2.0
Efficiency (%) 95
Package SOT23-5
X x Y Package Dimension (mm) -
Control Mode Current Mode PWM
Special Features Light Load PFM, Enable, Over Current Protection, Synchronous Rectification, Thermal Shutdown, 100% Duty Cycle
Operating Temperature (°C) -40 to 85
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The SP6669 is a synchronous current mode PWM step-down (buck) converter capable of delivering up to 800mA of current. It features a Pulse Skip Mode (PSM) for light load efficiency and an LDO mode for 100% duty cycle.


With a 2.5V to 5.5V input voltage range and a 1.5MHz switching frequency, the SP6669 allows the use of small surface mount inductors and capacitors ideal for battery powered portable applications. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.6V feedback reference voltage. The SP6669 is available in an adjustable output voltage version, using an external resistor divider circuit, as well as fixed output voltage versions of 1.2V, 1.5V and 1.8V.

Built-in over temperature and output overvoltage lock-out protections ensure safe operation under abnormal operating conditions.


The SP6669 is offered in a RoHS compliant, green/halogen free 5-pin SOT-23 package.

  • Guaranteed 800mA Output Current
    • Input Voltage: 2.5V to 5.5V
  • 1.5MHz PWM Current Mode Control
    • 100% Duty Cycle LDO Mode Operations
  • 0.6V 2% Accurate Reference
  • Excellent Line/Load Transient Response
  • 30µA Quiescent Current
  • Over Temperature Protection
  • RoHS Compliant “Green”/Halogen Free 5-Pin SOT23 Package

  • Portable Equipment
  • Battery Operated Equipment
  • Audio-Video Equipment
  • Networking & Telecom Equipment

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets SP6669 1A 1.5MHz Synchronous Step Down Converter 5.0.0 July 2021 1.3 MB
Application Notes AN200, Downloading and Installing CAD Symbols and Footprints with Ultra Librarian April 2019 1.2 MB
User Guides & Manuals SP6669 Evaluation Board Manual R101 April 2021 280.8 KB
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
Symbols & Footprints SP6669AEK-L/TRR3 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
SP6669AEK-L/TRR3 N Y Y Y Y L3 / 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
SP6669AEK-L SOT-23-5 OPT3 -40 85 OBS
SP6669AEK-L/TR SOT-23-5 OPT3 -40 85 OBS
SP6669AEK-L/TRR3 SOT-23-5 OPT3 -40 85 Active Order
SP6669BEK-L SOT-23-5 OPT3 -40 85 OBS
SP6669BEK-L/TR SOT-23-5 OPT3 -40 85 OBS
SP6669BEK-L/TRR3 SOT-23-5 OPT3 -40 85 OBS SP6669AEK-L/TRR3
SP6669CEK-L SOT-23-5 OPT3 -40 85 OBS
SP6669CEK-L/TR SOT-23-5 OPT3 -40 85 OBS
SP6669CEK-L/TRR3 SOT-23-5 OPT3 -40 85 OBS SP6669AEK-L/TRR3
SP6669DEK-L SOT-23-5 OPT3 -40 85 OBS
SP6669DEK-L/TR SOT-23-5 OPT3 -40 85 OBS
SP6669DEK-L/TRR3 SOT-23-5 OPT3 -40 85 OBS SP6669AEK-L/TRR3
SP6669DK-L/TR SOT-23-5 OPT3 -40 85 OBS
SP6669EB Board -40 85 Active
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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
SOT-23-5 OPT3
  • JEDEC Reference: MO-178
  • MSL Pb-Free: L3 @ 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
12/05/2020 ADDENDUM: Changes originally planned for SP6669 have been cancelled at this time.
02/19/2020 Process change. Refer to PCN for details.
02/14/2018 Product Discontinuation Notice
07/26/2016 Product discontinuation notification. Discontinued.
09/29/2015 HHNEC as alternate foundry Addition of an alternate foundry qualification
08/13/2015 Reactivation of previously announced discontinued products due to continuing customer demand. Product Reactivation
07/20/2015 Product discontinuation notification
10/23/2014 Material change and alternate assembly site, Greatek Taiwan, in addition to existing assembly site, Hana China. Qualified Greatek for assembly of the SOT23 package using copper wire bonding. Qualified die attach epoxy Sumitomo CRM-1076DJ-G.
06/06/2011 Addition of the alternate assembly supplier. Capacity enhancement.
08/07/2009 Notice of Obsolescence – Selected Power Management Parts Discontinued due to low market demand, effective immediately.
07/15/2009 These products will be dry packed to eliminate possible moisture related failures at board assembly. There is no change to Form, Fit, or Function as stated in the applicable datasheets. Products having moisture sensitivity greater than level 1 require dry packs according to the internal procedures and JEDEC guidelines.
10/27/2008 Four (4) part numbers were modified to reflect the exact Tape and Reel packaging method. SP6669xEK-L/TR to become SP6669xEK-L/TRR3 with x=A to D. Current part number did not reflect the actual Tape & Reel packing method.

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