800mA Synchronous Buck Regulator
Data Sheets OBS (Obsolete)


Information 800mA Synchronous Buck Regulator
# of Outputs 1
IOUT (A) 0.8
VIN MIN (V) 2.7
VIN MAX (V) 5.5
IQ (µA) 20
VOUT MIN (V) 0.8
Frequency (kHz) PFM
Accuracy (%) <4.0
Efficiency (%) 98
Package DFN-10
X x Y Package Dimension (mm) -
Control Mode COT
Special Features Light Load PFM, Enable, Over Current Protection, Power Good, Synchronous Rectification, Thermal Shutdown, UVLO Adjustable, Internal Compensation, 100% Duty Cycle
Operating Temperature (°C) -40 to 85
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The SP6654 is an 800mA synchronous buck regulator which is ideal for portable applications that use a Li-ion or 3-cell alkaline/NiCD/NiMH input. The SP6654’s proprietary control loop, 20μA light load quiescent current, and 0.3Ω power switches provide excellent efficiency across a wide range of output currents. As the input battery supply decreases towards the output voltage, the SP6654 seamlessly transitions into 100% duty cycle operation - further extending useful battery life. The SP6654 is protected against overload and short-circuit conditions with a precise inductor peak current limit. Other features include programmable undervoltage lockout, externally programmed output voltage down to 1.0V, logic level shutdown control and an open drain power good indicator when VOUT is above 94% of its programmed value.

  • Ultra-low 20µA quiescent current
  • 98% efficiency possible
  • 800mA output current
  • 2.7V to 5.5V input voltage range
  • Output adjustable down to 1.0V
  • No external FETs required
  • 1.25A inductor peak current limit
  • 100% duty ratio low dropout operation
  • 80µA light load quiescent current in dropout
  • Logic shutdown control
  • Programmable UVLO
  • Small 10-pin MSOP package and small DFN package
  • Power good indicator

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets SP6654 High Efficiency 800mA Synchronous Buck Regulator 1.0.0 December 2005 183.5 KB
Application Notes AN200, Downloading and Installing CAD Symbols and Footprints with Ultra Librarian April 2019 1.2 MB
Application Notes ANP-22, Filter Design in Continuous Conduction Mode B January 2007 270.6 KB
User Guides & Manuals SP6654 Evaluation Board Manual 1.0.0 February 2005 184.3 KB
Product Brochures Power Management Brochure October 2020 2.4 MB
Symbols & Footprints SP6654ER-L/TR CAD File (.bxl) September 2018 24.7 KB
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
SP6654ER-L/TR N Y Y Y Y L1 / 260ᵒC DFN10 3x3 OPT1

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 PDN
SP6654ER DFN10 3x3 OPT1 -40 85 OBS
SP6654ER-L DFN10 3x3 OPT1 -40 85 OBS SP6654ER-L/TR
SP6654ER-L/TR DFN10 3x3 OPT1 -40 85 OBS SP6669AEK-L/TRR3
SP6654ER/TR DFN10 3x3 OPT1 -40 85 OBS
SP6654EU MSOP10 -40 85 OBS
SP6654EU-L MSOP10 -40 85 OBS SP6654EU-L/TR
SP6654EU-L/TR MSOP10 -40 85 OBS SP6654ER-L/TR
SP6654EU/TR MSOP10 -40 85 OBS
SP6654EB Board 0 85 OBS
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: MO-187
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 214.0ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack:
  • Quantity per Reel: 2500
  • Quantity per Tube: 50
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 12 x 8
  • Tape & Reel Unit Orientation: Pin 1 at sprocket hole.
  • Dimensions: mm
  • Length: 3
  • Width: 3
  • Thickness: 1.1
  • Lead Pitch: 0.50
DFN10 3x3 OPT1
  • JEDEC Reference:
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic:
  • ThetaJA: 40.5C/W
  • Bulk Pack Style: n/a
  • 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): 330 x 12 x 8
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 3
  • Width: 3
  • Thickness: 1.00
  • Lead Pitch: 0.5


Distribution Date Description File
02/01/2023 Product Discontinuation Notice
01/31/2022 To increase manufacturing capacity, MaxLinear has qualified UTL3 extension site as an alternate assembly site together with UTL1 for QFN and DFN products.
07/11/2017 Product Discontinuation Notification
01/27/2017 Qualification of alternate assembly subcon, ANST, China.
07/26/2016 Product discontinuation notification. Discontinued.
10/04/2013 Addition of an alternate qualified assembly site, UTAC Thailand, for assembly using copper or gold wire bonding. Material change and alternate assembly site.
08/29/2011 Material change: Mold compound and die attach material are changed and the listed parts will be fully Green (halogen-free). Migrating to green environment and material standardization.
02/28/2007 Product Obsolescence Letter and Discontinuation Notification. Discontinued.

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