Synchronous Buck Switching Controller
Data Sheets OBS (Obsolete)


Information Synchronous Buck Switching Controller
Max Rec. Output Current (A) 30
IQ (µA) 1500
VIN MAX (V) 24
VOUT MIN (V) 0.8
Frequency (kHz) 300
Efficiency (%) 95
Control Mode Voltage Mode PWM
Special Features Enable, Over Current Protection, Power Good, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO Adjustable, Internal 5V VCC
Operating Temp Range (°C) -40 to 85
Package QFN-16
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The SP6133 is a synchronous step-down switching regulator controller optimized for high efficiency. The part is designed to be especially attractive for single supply step-down conversion from 5V to 24V. The SP6133 is designed to drive a pair of external NFETs using a fixed 300kHz frequency, PWM voltage mode architecture. Protection features include UVLO, thermal shutdown, output short-circuit protection and overcurrent protection with auto restart. The device also features a PWRGD output and an enable input. The SP6133 is available in a space saving 6-pin QFN and offers excellent thermal performance.

  • 5V to 24V input step-down converter
  • Up to 30A output capability
  • Highly integrated design, minimal components
  • UVLO detects both VCC and VIN
  • Overcurrent circuit protection with auto restart
  • Power good output, ENABLE input
  • Maximum controllable duty cycle ratio up to 92%
  • Wide BW amp allows type II or III compensation
  • Programmable soft-start
  • Fast transient response
  • High efficiency: greater than 95% possible
  • Available in 16-Pin QFN package
  • External driver enable/disable
  • U.S. Patent #6,922,041

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets SP6133 Synchronous Buck Controller M February 2020 870.1 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-01, Using Sipex PWM Controllers for Boost Conversion A November 2006 135.2 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 SP6133 Evaluation Board Manual 1.0.0 April 2006 503.2 KB
Design Solutions DS-17, Buck Converter Powers High Performance 1.2V Graphics GPU Vcore to 30A In Single Power Phase November 2007 153.6 KB
Design Solutions DS-41, Reducing Parasitic Oscillations to Achieve Low Noise Power Conversions Solutions Using Sipex Synchronous DC/DC Buck Controllers; Up to 24V Input and 10A Output Solutions November 2007 42.5 KB
Design Solutions DS-66, Synchronous Buck Controller Provides 10A LED Drive Current (25A Peak) from 15V Input Supply June 2007 168.2 KB
Design Solutions DS-04, SP6133 Converts 12V input to 1.3V output at 30A December 2005 195 KB
Design Solutions DS-01, SP6133 Converts 12V Input to 1.5V Output at 20A December 2005 201.1 KB
Spice Models - Generic Generic Spice Model November 2007 4.5 KB
Spice Models - OrCAD Orcad Spice Model November 2007 84.2 KB
Product Brochures Power Management Brochure October 2020 2.4 MB
SIMPLIS Models SP6133 SIMPLIS Model May 2011 12.9 MB
Symbols & Footprints SP6133ER1-L/TR CAD File (.bxl) September 2018 113.5 KB
SIMPLIS Models Powerlab Netlists
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
SP6133ER1-L/TR N Y Y Y Y L1 / 260ᵒC QFN16 3x3

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 PDN
SP6133ER1 QFN16 3x3 -40 85 OBS
SP6133ER1-ES QFN16 3x3 -40 85 OBS
SP6133ER1-L QFN16 3x3 -40 85 OBS SP6133ER1-L/TR
SP6133ER1-L/TR QFN16 3x3 -40 85 OBS XRP6141ELTR-F
SP6133ER1/TR QFN16 3x3 -40 85 OBS
SP6133EB Board -40 85 OBS XRP6141EVB
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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
QFN16 3x3
  • JEDEC Reference: MO-220
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic:
  • ThetaJA: 36.4ᵒC
  • Bulk Pack Style: Tray
  • Quantity per Bulk Pack: 490
  • Quantity per Reel: 3000
  • Quantity per Tube: n/a
  • Quantity per Tray: 490
  • Reel Size (Dia. x Width x Pitch): 330 x 12 x 8
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 3.0
  • Width: 3.0
  • Thickness: 1.00
  • Lead Pitch: 0.5


Distribution Date Description File
01/30/2023 Product Discontinuation Notice
02/14/2017 Qualification of alternate assembly subcon, GREATEK, Taiwan.
01/05/2017 Addition of an alternate qualified location, ANST, China.
07/26/2016 Product discontinuation notification. Discontinued.

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