Universal PMIC 3 Output Buck Regulator
Data Sheet


The XR77103-A0R5 step-down regulator features three 2A synchronous high efficiency buck regulators with integrated power switches. They can operate in 5V, 9V and 12V powered systems with minimal required external component thus providing the smallest size solution possible.  Two of the outputs may be paralleled for output currents up to 5A peak with steady state current of up to 4A.

The output voltage of each converter can be adjusted by external resistor divider down to voltage as low as 0.8V.  With a nominal switching frequency of 500kHz, the regulators can also be synchronized to an external clock in applications where EMI control is critical.

XR77103-A0R5 features a supervisor circuit that monitors each converter output.  PGOOD pin is asserted once sequencing is done, outputs are reported in regulation and the reset timer expires.  The polarity of the signal is active high.  A Pulse Skipping Mode (PSM) reduces switching losses maintaining high efficiency when the system is unloaded or in standby mode.


  • 4.5V to 14V wide input supply voltage range
  • Built-In MOSFET and synchronous rectifier
  • Three 2A buck regulators
    • Parallel operation allows two outputs in parallel for 5A peak output (4A steady state)
  • 0.8V, high accuracy reference (1%)
  • Current-mode control with simple compensation circuit
  • External synchronization
  • Power good
  • Protection
    • Thermal shutdown
    • Overvoltage transient protection
    • Overcurrent protection
  • 32pin TQFN package, 4mm x 4mm
  • Pin-compatible 1MHz version (XR77103-A1R0)
  • Pin-compatible programmable version (XR77103)


  • Low power FPGA and DSP supplies
  • Video processor supplies
  • Home gateways
  • Telecommunications and Infrastructure equipment
  • Industrial control and automation
  • Base stations, switches/routers

Design Tools


Pkg Code Details Quantities Dimensions PDF
TQFN32 4x4
  • JEDEC Reference:
  • MSL Pb-Free: L2 @ 260ᵒC
  • MSL SnPb Eutectic:
  • ThetaJA:
  • Bulk Pack Style: Tray
  • Quantity per Bulk Pack: 490
  • Quantity per Reel: 3000
  • Quantity per Tube:
  • 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: 4
  • Width: 4
  • Thickness: 0.8
  • Lead Pitch: 0.4

Parts & Purchasing

Part Number Pkg Code Min Temp Max Temp Status Buy Now
XR77103ELB-A0R5 TQFN32 4x4 -40 125 OBS Suggested:
XR77103ELBTR-A0R5 TQFN32 4x4 -40 125 Active
XR77103EVB-A0R5 Board Active
Show obsolete parts
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.

Quality & Environmental Data

Part Number RoHS | Exempt RoHS Halogen Free REACH MSL Rating / Peak Reflow Package
XR77103ELBTR-A0R5 N Y Y Y L2 / 260ᵒC TQFN32 4x4

Click on the links above to download the Certificate of Non-Use of Hazardous Substances.

Additional Quality Documentation may be available, please Contact Support.


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For material content, environmental, quality and reliability questions review the Quality tab or visit our Quality page.
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Frequently Asked Questions

The best way to determine this is to go to maxlinear.com and type the part into the search function. At or near the top of the results you should see something that looks like:

In this example, we looked for XRA1201. Click on part number header or on the link at the bottom of the result.  This brings you to the product page. For example:


Click on Parts & Purchasing, highlighted with the blue arrow above. The screen changes to:


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:


Another method to find out if a part is OBS or EOL is to click on SUPPORT at the top:


And then Product Change Notifications:


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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