15A Synchronous Step-Down COT Regulator


The XR76115 is a synchronous step-down regulator combining the controller, drivers, bootstrap diode and MOSFETs in a single package for point-of-load supplies. The XR76115 has a load current rating of 15A. A wide 3V to 22V input voltage range allows for single supply operation from industry standard 5V, 12V and 19.6V rails.

With a proprietary emulated current mode Constant On-Time (COT) control scheme, the XR76115 provides extremely fast line and load transient response using ceramic output capacitors. They require no loop compensation, simplifying circuit implementation and reducing overall component count. The control loop also provides 0.25% load and 0.1% line regulation and maintains constant operating frequency. A selectable power saving mode, allows the user to operate in Discontinuous Mode (DCM) at light current loads thereby significantly increasing the converter efficiency.

A host of protection features, including overcurrent, over temperature, short-circuit and UVLO, help achieve safe operation under abnormal operating conditions.

The XR76115 is available in a RoHS-compliant, green/halogen-free space-saving QFN 6 x 6mm package.

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  • 15A capable step-down regulator
    • 4.5V to 5.5V low VIN operation
    • 3V to 22V wide single input voltage
    • 3V to 22V PVIN with 5V bias
    • ≥0.6V adjustable output voltage
  • Controller, drivers, bootstrap diode and MOSFETs integrated in one package
  • Proprietary constant on-time control
    • No loop compensation required
    • Ceramic output cap. stable operation
    • Programmable 200ns-2µs on-time
    • Constant 200kHz to 800kHz frequency
    • Selectable CCM or CCM/DCM operation
  • Precision enable and power good flag
  • Programmable soft-start
  • 6 x 6mm 30-pin QFN Package
  • 5 x 5mm QFN 8A regulator, XR76108
  • 5 x 5mm QFN 12A regulator, XR76112


  • Distributed power architecture
  • Point-of-Load (POL) converters
  • Power supply modules
  • FPGA, DSP, and processor supplies
  • Base stations, switches/routers and servers

Design Tools

Technical Library


Pkg Code Details Quantities Dimensions PDF
QFN37 6x6
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  • MSL Pb-Free:
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  • Dimensions: mm
  • Length: 6.00
  • Width: 6.00
  • Thickness: 0.9
  • Lead Pitch:

Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
XR76115EL-F QFN37 6x6 -40 125 Active
XR76115ELMTR-F QFN37 6x6 -40 125 Active
XR76115ELTR-F QFN37 6x6 -40 125 Active
XR76115EVB Board 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.
Distribution Date Description File
04/26/2016 On-Time 2 and On-Time 3 data sheet limits adjusted after analyzing data on a large data sample. PCN 16-0310-02 XR76115-1033.pdf
03/30/2015 Design, datasheet and alternate assembly site changes. Refer to PCN. PCN_14-1148-01-01-1033.pdf