XR77128

Quad Channel Digital Programmable Power Management System with Selectable DrMOS Output

Description

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.

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Features

  • 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

Application

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

Design Tools

Evaluation Hardware and Software
Technical Library

Packaging

Pkg Code Details Quantities Dimensions PDF
TQFN44 7x7
  • JEDEC Reference: MO-220
  • MSL Pb-Free: TBD @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 30.2ºC/W
  • Bulk Pack Style: n/a
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 2500
  • Quantity per Tube: n/a
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 16 x 12
  • Tape & Reel Unit Orientation: Pin 1 at the top left near sprocket hole.
  • Dimensions: mm
  • Length: 7.00
  • Width: 7.00
  • Thickness: 0.75
  • Lead Pitch: 0.50

Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
XR77128ELB-F TQFN44 7x7 Active
XR77128ELBMTR-F TQFN44 7x7 EOL
XR77128ELBTR-F TQFN44 7x7 EOL
XR77128EVB-DEMO-1 Board Active
XR77128EVB-DEMO-1-KITA Kit Active
XR77XXEVB-XCM-V62 Board Active
Show obsolete parts
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
07/21/2017 Qualification of alternate assembly subcon, ANST. PCN 17-0626-01 ANST-1033.pdf
07/11/2017 Product Discontinuation Notification PDN_17-0623-01-1033.pdf