Programmable Power Management System
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Information Programmable Power Management System
# of Outputs 4
VIN MIN (V) 6.5
VIN MAX (V) 20
VOUT MIN (V) 0.9
VOUT MAX (V) 0.9*Vin
Set Point Resolution (mV) 50
Controller/ Regulator Controller
Gate Drive Pull Up/Down 3ohm / 1.8ohm
Internal MOSFETs No
IQ (mA) 9
Programmable Frequency Range (MHz) 0.3 to 1.5
Control Technology 11 bit DPWM
NVM Technology OTP
Junction Temp Range (°C) -40 to 125
Package TQFN40
Special Features High Current Drivers
PowerArchitect Version# 4
Additional Features
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The XRP7740 is a quad-output Pulse-Width Modulated (PWM) step-down DC-DC controller with a built-in LDO for standby power and GPIOs. The device provides a complete power management solution in one IC and is fully programmable via the included I2C serial interface. Independent Digital Pulse Width Modulator (DPWM) channels regulate output voltages and provide all required protection functions such as current limiting and overvoltage protection.

Each output voltage can be programmed from 0.9V to 5.1V without the need of an external voltage divider. The wide range of the programmable DPWM switching frequency (from 300 KHz to 1.5 MHz) enables the user to optimize between efficiency and component size. Input voltage range is from 6.5V to 20V. Two controllers support a load of up to 5A, while the other two controllers support up to 15A.

I2C bus interface is provided to program the IC as well as to communicate with the host for fault reporting and handling, power rail parameters monitoring, etc.

The device offers a complete solution for soft-start and soft-stop. The start-up delay and ramp of each PWM regulator can be independently controlled. The device can start up a pre-biased PWM channel without causing large negative inductor current.

The Exar Configuration Model XR77xxEVB-XCM-V80 interface board provides designers with a simple, quick and inexpensive means of evaluating and prototyping new designs using Programmable Universal PMIC devices with PowerArchitect4. This Evaluation Board is designed only for low volume engineering purposes; not production volumes. For production requirements commercial programmers must be used. The Evaluation Board is provided “as is and whereas” and without any warranty as to results, merchantability or purpose. Exar is not responsible for misuse of the Evaluation Board.

  • Four switching buck (step-down) controllers each with internal FET drivers. Two controllers (2 & 4) support loads up to 15A; two controllers (1 & 3) support load up to 5A.
  • 6.5V to 20V input voltage range – no additional voltage rails required
  • Output voltages programmable from 0.9V to 5.1V
  • Up to 6 reconfigurable GPIO pins
  • Fully programmable via I2C interface
  • Independent Digital Pulse Width Modulator (DPWM) channels with five coefficient PID control
  • High integration: elimination of external circuits and components required for compensation, parameter adjustment and interface
  • Programmable DPWM frequency range (300 kHz to 1.5 MHz) enables efficiency and component size optimization
  • Complete power monitoring and reporting
  • Independently controlled start-up delay and ramp for each regulator, including soft-start with a pre-biased load voltage
  • Independently controlled soft-stop delay and ramp for each regulator with a programmable stop voltage
  • Over temperature protection (OTP) and undervoltage lockout (UVLO); per-channel overcurrent protection (OCP) and overvoltage protection (OVP)
  • Built-in LDO (configurable to 3.3V or 5V) with overcurrent protection
  • Non-volatile memory for system configuration
  • Evaluation Board and Configuration Module (XCM) are available for evaluation and development purposes only
  • PowerArchitect™ Design and Configuration Software
  • Third-Party Programming Support

  • Computing: servers, storage systems
  • Consumer: set-top box (STB), game systems
  • Industrial: ATE, DC-DC converters, video processing
  • Plasma display panel (PDP)
  • Networking and telecommunications equipment

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets XRP7740 Quad Channel Digital PWM Step Down Controllers 1.3 March 2020 1.3 MB
Application Notes AN200, Downloading and Installing CAD Symbols and Footprints with Ultra Librarian April 2019 1.2 MB
Application Notes ANP-37, PowerXR EMI Reduction Technique Utilizing Spread-Spectrum Clock Dithering 1.0.1 July 2013 3 MB
Application Notes ANP-32, Practical Layout Guidelines for PowerXR Designs 1.1.0 October 2012 1.5 MB
Application Notes ANP-35, XRP77XX: Extending the MOSFET Gate Drive Conductors 1.0.0 May 2011 2 MB
Application Notes ANP-31, PowerXR Configuration and Programming 1.0.0 August 2010 405.5 KB
User Guides & Manuals XRP7740EVB-HC Evaluation Board Manual 1.0.1 March 2020 1.2 MB
User Guides & Manuals XR77XXEVB-XCM-V80 (Configuration Module) 1.0.1 October 2017 876.2 KB
Product Flyers Universal PMICs April 2019 2 MB
Product Brochures Power Management Brochure October 2020 2.4 MB
Symbols & Footprints XRP7740ILB-F CAD File (.bxl) September 2018 163.6 KB
PowerArchitect PowerArchitect
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
XRP7740ILB-0X18-F N Y Y Y Y L3 / 260ᵒC TQFN40 6x6
XRP7740ILB-F N Y Y Y Y L3 / 260ᵒC TQFN40 6x6
XRP7740ILBTR-0X18-F N Y Y Y Y L3 / 260ᵒC TQFN40 6x6

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
XRP7740ILB-0X18-F TQFN40 6x6 -40 125 Active Order
XRP7740ILB-F TQFN40 6x6 -40 125 Active Order
XR77XXEVB-XCM-V80 Board Active
XRP7740EVB Board Active
XRP7740EVB-HC 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
TQFN40 6x6
  • JEDEC Reference: MO-220
  • MSL Pb-Free: L3 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 18.1ºC/W
  • Bulk Pack Style: Tray
  • Quantity per Bulk Pack: 490
  • Quantity per Reel: 3000
  • Quantity per Tube: n/a
  • Quantity per Tray: 490
  • Reel Size (Dia. x Width x Pitch): 330 x 16 x 12
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 6.00
  • Width: 6.00
  • Thickness: 0.8
  • Lead Pitch: 0.50


Distribution Date Description File
01/12/2021 Product Discontinuation Notice
07/11/2017 Product Discontinuation Notification
01/05/2017 Addition of an alternate qualified location, ANST, China.
10/15/2010 Package/Shipping Change: New carrier tape dimension. Standardization.

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For best gate drive performance, it is recommended to route GL_RTN (PGND) together with its GL pin like a differential pair instead of just connecting GL_RTN to GND at the IC and subjecting it to ground noise. Routing them together cancels out any noise, inductive and electromagnetic field effects between these two traces. See ANP-32 Practical Layout Guidelines for PowerXR Designs http://www.exar.com/appnote/anp32 page 8 for more information.

The -F suffix indicates ROHS / Green compliance: