Universal PMIC 3 Output Programmable Buck Regulator
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# of Outputs 3
VIN MIN (V) 4.5
VIN MAX (V) 14
VOUT MIN (V) 0.8
Set Point Resolution (mV) 50
Controller/ Regulator Regulator
Gate Drive Pull Up/Down 3A / 2A / 2A
Internal MOSFETs Yes
IQ (mA) 1.5
Programmable Frequency Range (MHz) 0.3-2.2
Control Technology Current Mode PWM/PSM
NVM Technology EEPROM
Junction Temp Range (°C) -40 to 125
Package TQFN32
Special Features Phase Interleaving
PowerArchitect Version# 4
Additional Features
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The XR77103 features three synchronous, wide input range, high efficiency buck converters. Each converter is digitally programmable requiring minimal external components thus providing the smallest size solution possible.

The converters can operate in 5V, 9V and 12V systems and have integrated power switches. The output voltage of each converter can be adjusted by programming the values in the VOUT setting registers through an I2C interface. The adjustable range is 0.8~6V with 50mV resolution. The output voltage can also be set externally using an external resistor divider. Output sequence among the outputs, soft-start time and the peak inductor current limit are also set through I2C.

The switching frequency of the converters can either be set with I2C or can be synchronized to an external clock. The switching regulators are designed to operate from 300kHz to 2.2MHz. Each converter operates in phase or out of phase according to the value in the phase setting register. This can minimize the input filter requirements.

XR77103 features a supervisor circuit that monitors each converter output. PGOOD pin is asserted once sequencing is done, all outputs are reported in regulation and the reset timer expires. The polarity of the signal is active high.

XR77103 also features a light load Pulse Skipping Mode (PSM). It is set through I2C. The PSM mode allows for a reduction on the input power supplied to the system when the host processor is in stand-by mode (low activity) mode.

  • 4.5V to 14V wide input supply voltage range
  • Built-in MOSFET and synchronous rectifier
  • I2C programmable supplies
    • Output voltage (0.8~6V)
    • Power on sequence
    • Soft-start timing
    • Switching frequency (300kHz~2.2MHz)
    • Individual current limit
    • Optional power saving mode at light loads
  • Non Volatile Memory (NVM) with up to 10,000 times write operation
  • 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
  • Third-Party Programming Support
  • Supported by Excel Configuration Tool
  • Evaluation Board, Demo Kit and Configuration Module (XCM) are available for evaluation and development purposes only
  • 32-pin, 4 x 4mm TQFN package
  • Pin-compatible non-programmable versions

  • 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 Universal PMIC 3-Output Programmable Buck Regulator REV1F March 2020 1.8 MB
Application Notes AN200, Downloading and Installing CAD Symbols and Footprints with Ultra Librarian April 2019 1.2 MB
User Guides & Manuals XR77103 Universal PMIC 3 Output Buck Regulator EVK User Manual R00 November 2019 19.1 MB
Product Flyers Universal PMICs April 2019 2 MB
Product Brochures Power Management Brochure October 2020 2.4 MB
Configuration Tools XR77103 Configuration Tool 1V0 December 2019 333.2 KB
Symbols & Footprints XR77103ELB CAD File (.bxl) September 2018 175.1 KB
Symbols & Footprints XR77103ELBTR CAD File (.bxl) September 2018 175.1 KB
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
XR77103ELBTR 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
XR77103ELB TQFN32 4x4 OBS
XR77103ELBTR TQFN32 4x4 -40 125 Active Order
XR77103EVB-DEMO-1 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


Distribution Date Description File
03/04/2019 Product Discontinuation Notice

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