3A, 18V Synchronous Step-Down Converter


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.

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  • 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

Design Tools


Pkg Code Details Quantities Dimensions PDF
  • JEDEC Reference: MS-012
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 59ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 2500
  • Quantity per Tube: n/a
  • Quantity per Tray: 98
  • Reel Size (Dia. x Width x Pitch): 330 x 12 x 4
  • Tape & Reel Unit Orientation: Pin 1 at sprocket hole.
  • Dimensions: mm
  • Length: 4.90
  • Width: 3.90
  • Thickness: 1.65 max.
  • Lead Pitch: 1.27

Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
XRP7665IDBTR-F HSOIC8 -40 85 Active
XRP7665EVB 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
02/23/2017 Qualification of alternate assembly subcon, ANST, China. PCN 16-1149-02-01 ANST-1033.pdf
06/17/2013 Addition of an alternate qualified wafer foundry. Process change. PCN_13-0519-01-1033.pdf
04/08/2013 Die Revision Product Improvement and compatibility with industry equivalent devices. PCN_13-0402-02-1033.pdf