XR77128

Quad Channel Digital Programmable Power Management System with Selectable DrMOS Output
Product Flyer OBS (Obsolete)

Overview

Information Quad Channel Digital Programmable Power Management System with Selectable DrMOS Output
Package TQFN44
# of Channels 4
Special Features DrMOS Support, Expanded GPIO Options
VIN MIN (V) 4.75
VIN MAX (V) 25
# of Outputs 4
VOUT MIN (V) 0.6
VOUT MAX (V) 0.9*Vin
Junction Temp Range (°C) -40 to 125
IQ (mA) 4
Controller/ Regulator Controller
Gate Drive Pull Up/Down 4ohm / 2ohm
Internal MOSFETs No
Programmable Frequency Range (MHz) 0.1 to 1.2
NVM Technology Flash
PowerArchitect Version# 5
Additional Features XR7724 upgrade with the ability to drive MOSFETs and DrMOS
Set Point Resolution (mV) 2.5
Control Technology 17 bit DPWM/DPFM
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The XR77128 is a quad channel Digital Pulse Width Modulated (DPWM) step-down (buck) controller. A wide 4.75V to 25V input voltage range allows for single supply operation from standard power rails.

With integrated FET gate drivers, two LDOs for standby power and a 105kHz to 1.23MHz independent channel-to-channel programmable constant operating frequency, the XR77128 reduces overall component count and solution footprint and optimizes conversion efficiencies. A selectable digital Pulse Frequency Mode (DPFM) capable of better than 80% efficiency at light current load and low operating current allow for portable and Energy Star compliant applications. Each XR77128 output channel is individually programmable as low as 0.6V with a resolution as fine as 2.5mV and configurable for precise soft-start and soft-stop sequencing, including delay and ramp control.

The XR77128 operation is fully controlled via a SMBus-compliant I2C interface allowing for advanced local and/or remote reconfiguration, full performance monitoring and reporting as well as fault handling.

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

The XR77128 is offered in a RoHS compliant, "green"/halogen free 44-pin TQFN package.

  • Quad channel step-down controller
    • Digital PWM 105kHz to1.23MHz operation
    • Individual channel frequency selection
    • Patented digital PFM with ultrasonic mode
    • Patented oversampling feedback
  • Pin compatible to XRP7724 with added features
    • Selectable DrMOS drive capability
    • Additional GPIO configurability
    • Current limit fault options
    • Additional conditional fault options
    • Improved output voltage accuracy
  • 4.75V to 25V input voltage
    • 4.75V to 5.5V and 5.5V to 25V input ranges
    • 0.6V to 5.5V output voltage
  • SMBus compliant - I2C interface
    • Full monitoring and reporting
  • 3 x 15V capable PSIO + 2 x GPIOs
  • Full start/stop sequencing support
  • Built-in thermal, overcurrent, UVLO and output overvoltage protections
  • Onboard 5V and 3.3V standby LDOs
  • Onboard non-volatile memory
  • Evaluation Board, Demo Kit and Configuration Module (XCM) are available for evaluation and development purposes only
  • Supported by PowerArchitect™ Design and Configuration Software
  • Third-Party Programming Support

  • Automotive infotainment
  • Industrial control systems
  • Audio systems
  • Automatic test equipment
  • Video surveillance systems

Documentation & Design Tools

Type Title Version Date File Size
Application Notes AN200, Downloading and Installing CAD Symbols and Footprints with Ultra Librarian April 2019 1.2 MB
User Guides & Manuals XRP77xxEVB-XCM-V62 (Configuration Module) 1.0.1 October 2017 880.5 KB
User Guides & Manuals XR77128 Evaluation Board Manual 1.0.0 December 2014 1.5 MB
Product Flyers Universal PMICs April 2019 2 MB
Product Brochures Power Management Brochure October 2020 2.4 MB
Symbols & Footprints XR77128ELB-F CAD File (.bxl) September 2018 209.1 KB
PowerArchitect PowerArchitect
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
XR77128EVB-DEMO-1-KITA N/A N/A N/A N/A N/A Kit N/A
XR77128ELB-F N Y Y Y Y TQFN44 7x7 Y

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 PDN
XR77128ELB-F TQFN44 7x7 -40 125 OBS XRP7714ILBTR-F
XR77128ELBMTR-F TQFN44 7x7 OBS
XR77128ELBTR-F TQFN44 7x7 OBS
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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.

Packaging

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

Notifications

Distribution Date Description File
03/05/2021 Product Discontinuation Notice
07/21/2017 Qualification of alternate assembly subcon, ANST.
07/11/2017 Product Discontinuation Notification

FAQs & Support

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The -F suffix indicates ROHS / Green compliance:
https://www.exar.com/quality-assurance-and-reliability/lead-free-program

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