Universal PMIC 3 Output Buck Regulator
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Information Universal PMIC 3 Output Buck Regulator
# of Outputs 3
VIN MIN (V) 4.5
VIN MAX (V) 14
VOUT MIN (V) 0.8
Set Point Resolution (mV)
Controller/ Regulator Regulator
Gate Drive Pull Up/Down 3A / 2A / 2A
Internal MOSFETs Yes
IQ (mA) 1.5
Programmable Frequency Range (MHz) 1
Control Technology Current Mode PWM/PSM
NVM Technology Pre-programmed
Junction Temp Range (°C) -40 to 125
Package TQFN-32
Special Features -
PowerArchitect Version# N/A
Additional Features Light Load PFM, Enable, Over Current Protection, Power Good, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO, Phase Interleaving, Clock Sync, Soft Start Built-in
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The XR77103-A1R0 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 1MHz, the regulators can also be synchronized to an external clock in applications where EMI control is critical.
XR77103-A1R0 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 500kHz version (XR77103-A0R5)
  • 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

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets XR77103-A1R0 Universal PMIC 3-Output Buck Regulator REV1D May 2019 1.7 MB
User Guides & Manuals XR77103-A1R0 Evaluation Board Manual R00 March 2022 3.9 MB
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
XR77103ELBTR-A1R0 N Y 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.

Parts & Purchasing

Part Number Pkg Code Min Temp Max Temp Status Suggested Replacement Buy Now Order Samples PDN
XR77103ELBTR-A1R0 TQFN32 4x4 -40 125 Active Order
XR77103EVB-A1R0 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.


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