SP6123

8-Pin Synchronous Buck Step-Down Controller

Overview

Information
Package SOIC-8
IQ (µA) 500
Special Features Enable, Over Current Protection, Synchronous Rectification, UVLO Soft Start Built-in
VIN MIN (V) 3
VIN MAX (V) 5.5
VOUT MIN (V) 0.8
VOUT MAX (V) 4.5
Frequency (kHz) 300
Efficiency (%) 95
Control Mode Voltage Mode PWM
Operating Temp Range (°C) 0 to 70
Max Rec. Output Current (A) 10
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The SP6123 is a fixed frequency, voltage mode, synchronous PWM controller designed to work from a single 5V or 3.3V input supply, providing excellent AC and DC regulation for high efficiency power conversion. Requiring only few external components, the SP6123 packaged in an 8-pin NSOIC, is especially suited for low voltage applications where cost, small size and high efficiency are critical. The operating frequency is internally set to 300kHz (SP6123) or 500kHz (SP6123A), allowing small inductor values and minimizing PC board space. The SP6123 drives an all N-channel synchronous power MOSFET stage for improved efficiency and includes an accurate 0.8V reference for low output voltage applications.

  • Optimized for single supply, 3V to 5.5V applications
  • High efficiency: greater than 95% possible
  • Accurate fixed 300kHz (SP6123) or 500kHz (SP6123A) frequency operation
  • Fast transient response
  • Internal soft-start circuit
  • Accurate 0.8V reference allows low output voltages
  • Resistor programmable output voltage
  • Loss-less current limit with high side RDS(ON) sensing
  • Hiccup mode current limit protection
  • Dual N-channel MOSFET synchronous driver
  • Quiescent current: 500µA, 30µA in shutdown
  • 8-Pin surface mount package
  • Frequency for SP6123A is 500kHz

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets SP6123/SP6123A Low Voltage, Synchronous Step-Down PWM Controller 1.0.0 December 2005 149.8 KB
Application Notes AN200, Downloading and Installing CAD Symbols and Footprints with Ultra Librarian April 2019 1.2 MB
Application Notes ANP-16, Loop Compensation of Voltage-Mode Buck Converters A January 2008 105.3 KB
Application Notes ANP-18, Selecting Appropriate Compensation: Type-II or Type-III A December 2006 41.3 KB
Application Notes ANP-18, Type II Loop Compensation Calculator A December 2006 589 KB
Application Notes ANP-15, Voltage Mode Control: The Modulator in Continuous Current Mode (CCM) of operation D November 2006 430 KB
Application Notes ANP-20, Properly Sizing MOSFETs for PWM Controllers A November 2006 526.5 KB
Application Notes ANP-16, Type III Loop Compensation Calculator A October 2006 595 KB
User Guides & Manuals SP6123 Evaluation Board Manual 1.0.0 August 2005 227 KB
Spice Models - OrCAD Orcad Spice Model 1.0.0 November 2007 43.7 KB
Spice Models - OrCAD Orcad Spice Model 1.0.0 November 2007 76.5 KB
Spice Models - Generic Generic Spice Model 1.0.0 November 2007 3.4 KB
Spice Models - Generic Generic Spice Model 1.0.0 November 2007 3.4 KB
Design Solutions DS-19, Low EMI, High Efficiency Buck Solution Converts 5V Input to 1V Output At 1.5A In Only 16mmx16mm November 2007 392.7 KB
Product Brochures Power Management Brochure October 2020 2.4 MB
Symbols & Footprints SP6123CN-L/TR CAD File (.bxl) September 2018 75.5 KB
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
SP6123CN-L/TR N Y Y Y Y L1 / 260ᵒC NSOIC8

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
SP6123ACN NSOIC8 0 70 OBS
SP6123ACN/TR NSOIC8 0 70 OBS
SP6123ACN-L NSOIC8 0 70 OBS
SP6123ACN-L/TR NSOIC8 0 70 OBS
SP6123ACY 0 70 OBS
SP6123AEN NSOIC8 0 70 OBS
SP6123AEN/TR NSOIC8 0 70 OBS
SP6123AEN-L NSOIC8 -40 85 OBS
SP6123AEN-L/TR NSOIC8 0 70 OBS
SP6123AEY 0 70 OBS
SP6123CN NSOIC8 0 70 OBS
SP6123CN/TR NSOIC8 0 70 OBS
SP6123CN-L NSOIC8 0 70 OBS
SP6123CN-L/TR NSOIC8 0 70 Active Order
SP6123CY 0 70 OBS
SP6123CY/TR 0 70 OBS
SP6123EN NSOIC8 -40 85 OBS
SP6123EN/TR NSOIC8 -40 85 OBS
SP6123EN-L NSOIC8 -40 85 OBS
SP6123EN-L/TR NSOIC8 -40 85 OBS
SP6123EY 0 70 OBS
SP6123EY/TR 0 70 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.

Packaging

Pkg Code Details Quantities Dimensions PDF
NSOIC8
  • JEDEC Reference: MS-012
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 128.4ºC/W (std); 96.8ºC/W (fused)
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: 98
  • Quantity per Reel: 2500
  • Quantity per Tube: 98
  • 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: 4.90
  • Width: 3.90
  • Thickness: 1.75
  • Lead Pitch: 1.27

Notifications

Distribution Date Description File
07/11/2017 Product Discontinuation Notification
02/23/2017 Qualification of alternate assembly subcon, ANST, China.
02/15/2017 Qualification of alternate assembly subcon, ANST.
07/26/2016 Product discontinuation notification. Discontinued.
04/13/2016 Qualification of alternate assembly subcon, JCET.
07/02/2013 Qualification of an alternate qualified assembly supplier, ASE Chung-Li (Taiwan) for the 8L NSOIC package using copper wire bonding. Material change and alternate assembly supplier qualified.
03/23/2010 Alternate qualified assembly supplier Capacity enhancement
12/07/2009 Enhancement of NSOIC 8, NSOIC14 and NSOIC16 packages to Green (halogen-free) via Mold Compound & Die Attach Material. Enhance packages to be Green (halogen-free).
02/28/2007 Product Obsolescence Letter and Discontinuation Notification. Discontinued.
06/26/2006 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
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

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.
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Submit a Technical Support Question As a New Question

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.

See Application Note ANP-20 (Properly Sizing MOSFETs for PWM Controllers).