1.5A Non Synchronous Step-Down Regulator
Data Sheet NRND (Not Recommended for New Designs)


Information 1.5A Non Synchronous Step-Down Regulator
Package SOT23-6
IQ (µA) 800
Special Features Enable, Over Current Protection, Thermal Shutdown, Soft Start Built-in, Internal Compensation
VIN MIN (V) 4.5
VIN MAX (V) 18
# of Outputs 1
VOUT MIN (V) 0.81
Frequency (kHz) 1400
Efficiency (%) 92
Accuracy (%) 3.0
IOUT (A) 1.5
X x Y Package Dimension (mm) -
Control Mode Current Mode PWM
Operating Temperature (°C) -40 to 85
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The XRP7659 is a current-mode PWM step-down (buck) voltage regulator capable of delivering an output current up to 1.5Amps. A wide 4.5V to 18V input voltage range allows for single supply operation from industry standard 5V, 9.6V and 12V power rails.

With a 1.4MHz constant operating frequency, integrated high-side MOSFET and loop compensation, the XRP7659 reduces the overall component count and solution footprint. Current-mode control provides fast transient response and cycle-by-cycle current limit. An integrated 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 over-current and undervoltage lockout (UVLO) protection insure safe operation under abnormal operating conditions.

The XRP7659 is a pin and function compatible device to Monolithic Power Systems MP2359 for input voltages below 18V.

The XRP7659 is offered in a RoHS compliant, "green"/halogen free 6-pin SOT23 package.

  • 1.5A continuous output current
  • 4.5V to 18V wide input voltage
  • PWM current-mode control
    • 1.4MHz constant operation
    • Up to 92% efficiency
  • Adjustable output voltage
    • 0.81V to 15V range
    • ±3% accuracy
  • Enable function and soft-start
  • Built-in thermal, overcurrent, UVLO and output overvoltage protection
  • Pin/function (VIN<18V) compatible to MP2359
  • RoHS compliant, "green"/halogen free 6-pin SOT23 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 XRP7659 1.5A 18V 1.4MHz Non Synchronous Step-Down Regulator 1.2.1 February 2020 1 MB
Application Notes AN200, Downloading and Installing CAD Symbols and Footprints with Ultra Librarian April 2019 1.2 MB
User Guides & Manuals XRP7659 Evaluation Board Manual 1.0.0 August 2012 603.5 KB
Product Brochures Power Management Brochure October 2020 2.4 MB
Symbols & Footprints XRP7659ISTR-F CAD File (.bxl) September 2018 80.2 KB
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
XRP7659ISTR-F N Y Y Y Y L3 / 260ᵒC SOT-23-6

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 PDN
XRP7659ISTR-F -40 85 OBS
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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
03/29/2022 Product Discontinuation Notice
02/19/2016 Material change. Qualified copper wire bonding assembly.
01/09/2015 Alternate Assembly Site Change. Qualified JCET ChuZhou for assembly of the listed parts.
07/29/2013 Qualified ABLECOAT 8008 (wafer back-side coated) die attach material in assembly to replace ABLEBOND 8290 (dispense type) die attach material. Material Change

FAQs & Support

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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:


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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.

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The -F suffix indicates ROHS / Green compliance: