Quad Output Universal Customizable PMIC with PFM


The XRP7720 is a quad output universal customizable PMIC comprised of a quad channel Digital Pulse Width Modulated (DPWM) step-down (buck) controller and 5V LDO. A wide 4.75V to 5.5V and 5.5V to 18V input voltage dual range allows for single supply operation from standard power rails. It is pin compatible to the popular XRP7724 and provides full flexibility during the development phase while offering a cost effective option for high volume production units.

With integrated FET gate drivers, it can operate from 105kHz to 1.23MHz with independent channel-to-channel programmable operating frequency, the XRP7720 reduces overall component count and solution footprint while optimizing conversion efficiencies. A selectable Digital Pulse Frequency Mode (DPFM) and low operating current result in better than 80% efficiency down to 10mA load provides support for portable and Energy Star compliant applications. Each XRP7720 output channel is individually programmable down to a minimum 0.6V with a resolution of 2.5mV, and configurable for precise soft-start and soft-stop sequencing, including delay and ramp control.

During development, the XRP7720ILB-DEV is configured using PowerArchitectTM 5.1 (PA 5.1) through an I2C interface, allowing for short development of the power system and short time-to-market for the entire system. Once development is completed and volume production is ready to commence, Exar will assign a unique part suffix and deliver a customized XRP7720.

Built-in independent output overvoltage, over temperature, overcurrent and undervoltage lockout protections ensure safe operation under abnormal operating conditions.

The XRP7720 is offered in a RoHS compliant, “green”/halogen free 44-pin TQFN package.

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  • Pin compatible to XRP7724
    • SMBus compliant I2C interface available on XRP7720ILB-DEV only
  • Supported by PowerArchitect™ Design and Configuration Software
    • XRP7720ILB-DEV only
  • Quad channel step-down controller
      Digital PWM 105kHz to 1.23MHz operation
    • Individual channel frequency selection
    • Patented digital PFM with ultrasonic mode
    • Integrated MOSFET drivers
    • Programmable 5 coefficient PID control
  • 4.75V to 18V input voltage
    • 4.75V-5.5 and 5.5V-18V input range
    • 0.6V to 5.5V output voltage
  • 3 x 15V capable PSIOs + 2 x GPIOs
  • Full start/stop sequencing support
  • Built-in thermal, overcurrent, UVLO and output overvoltage protections
  • On board 5V standby LDO
  • 7x7mm TQFN44 package


  • Blade servers
  • Micro servers
  • Network adapter cards
  • Switches/routers
  • Video surveillance systems

Design Tools

Evaluation Hardware and Software


Pkg Code Details Quantities Dimensions PDF
TQFN44 7x7
  • JEDEC Reference: MO-220
  • MSL Pb-Free: L3 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 30.2ºC/W
  • Bulk Pack Style: Tray
  • Quantity per Bulk Pack: 260
  • Quantity per Reel: 3000
  • Quantity per Tube: n/a
  • Quantity per Tray: 260
  • Reel Size (Dia. x Width x Pitch): 330 x 16 x 12
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 7.00
  • Width: 7.00
  • Thickness: 0.8
  • Lead Pitch: 0.50

Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
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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
07/11/2017 Product Discontinuation Notification Product Discontinuation Notice 17-0623-02 r-1033.pdf