3A, 18V Synchronous Step-Down Converter
Data Sheets OBS (Obsolete)


Information 3A 18V Synchronous Step-Down Converter
# of Outputs 1
IOUT (A) 3
VIN MIN (V) 4.5
VIN MAX (V) 18
IQ (µA) 1000
VOUT MIN (V) 0.925
Frequency (kHz) 340
Accuracy (%) 2.0
Efficiency (%) 93
Package HSOIC-8
X x Y Package Dimension (mm) -
Control Mode Current Mode PWM
Special Features Enable, Over Current Protection, Thermal Shutdown, Soft Start Adjustable
Operating Temperature (°C) -40 to 85
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The XRP7665 is a synchronous current mode PWM step-down (buck) regulator capable of a constant output current up to 3Amps. A wide 4.5V to 18V input voltage range allows for single supply operations from industry standard 5V and 12V power rails.

With a 340kHz constant operating frequency and integrated high and low side 100mΩ/100mΩ MOSFETs, the XRP7665 reduces the overall component count and solution footprint. Current-mode control provides fast transient response and cycle-by-cycle current limit. An adjustable soft-start prevents inrush current at turn-on, and in shutdown mode the supply current drops to 0.1µA.

Built-in output overvoltage (open load), over temperature, cycle-by-cycle overcurrent and undervoltage lockout (UVLO) protections insure safe operations under abnormal operating conditions.

The XRP7665 is a pin and function compatible device to MP1484 and a 3A pin to pin upgrade to XRP7664.

  • Pin/function compatible to MP1484
  • 3A continuous output current
  • 4.5V to 18V wide input voltage
  • PWM current mode control
    • 340kHz constant operations
    • Up to 93% efficiency
  • Adjustable output voltage
    • 0.925V to 16V range
    • 2% accuracy
  • Programmable soft-start and enable function
  • Built-in thermal, overcurrent, UVLO and output overvoltage protections
  • Pin compatible upgrade to XRP7664
  • RoHS compliant, "green"/halogen free 8-Pin SOIC package

  • Distributed power architectures
  • Point of Load (POL) converters
  • Audio video equipment
  • Medical and industrial equipment

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets XRP7665 3A 18V Synchronous Step-Down Converter 2.0.1 March 2013 1.1 MB
Application Notes AN200, Downloading and Installing CAD Symbols and Footprints with Ultra Librarian April 2019 1.2 MB
Application Notes ANP-40, Current Mode Compensation 1.0.0 April 2013 712.2 KB
Application Notes ANP-40, Current Mode Compensation - Supporting Spreadsheet 1.0.0 April 2013 81.6 KB
User Guides & Manuals XRP7664-65-74-75 Evaluation Board Manual 2.0.0 August 2014 808.2 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 XRP7665IDBTR-F CAD File (.bxl) September 2018 75.9 KB
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package

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
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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
  • JEDEC Reference:
  • MSL Pb-Free: L3 @ 260ᵒC
  • MSL SnPb Eutectic:
  • ThetaJA: 60ᵒC/W
  • Bulk Pack Style: n/a
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 2500
  • 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:
  • Dimensions: mm
  • Length: 4.9
  • Width: 3.9
  • Thickness: 1.75
  • Lead Pitch: 1.27


Distribution Date Description File
03/29/2022 Product Discontinuation Notice
02/23/2017 Qualification of alternate assembly subcon, ANST, China.
06/17/2013 Addition of an alternate qualified wafer foundry. Process change.
04/08/2013 Die Revision Product Improvement and compatibility with industry equivalent devices.

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The -F suffix indicates ROHS / Green compliance: