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Product Detailed Parameters
- Description：IC REG CTRLR BUCK SMBUS 44TQFN
- Series：-
- Mfr：MaxLinear, Inc.
- Package：Tape & Reel (TR)
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：4
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：5.5V ~ 25V
- Frequency - Switching：105kHz ~ 1.23MHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：Yes
- Clock Sync：No
- Serial Interfaces：I2C, SMBus
- Control Features：Enable
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：44-WFQFN Exposed Pad
- Supplier Device Package：44-TQFN (7x7)
- Grade：-
- Qualification：-
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Overview
The XR77128ELBTR-F is a quad-channel programmable digital buck controller from MaxLinear, designed as an upgrade to the XRP7724 with DrMOS output capability. It operates within an input voltage range of 4.75 V to 25 V and supports a control supply voltage of 4.75 V to 5.5 V or 5.5 V to 25 V. The device features an input current of 18 mA and utilizes a TQFN-EP-44 package. This component is classified under specialized PMICs and digital power management solutions.
Feature Summary
- Quad-channel programmable digital buck controller architecture
- Designed for integration with DrMOS outputs
- Supports SMBus communication interface
Applications
- Digital power management systems requiring multi-phase buck regulation
- Upgrades from legacy XRP7724 designs utilizing DrMOS topology
- Industrial or server applications needing programmable digital control
Procurement Notes
Verify component status carefully as this part is marked as obsolete or not recommended for new designs in several distributor records. Confirm availability through authorized channels and check for product discontinuation notifications (PCN) prior to procurement. Ensure that any substitute components maintain compatibility with existing DrMOS configurations and SMBus requirements.
Selection Notes
Select this component only if the design specifically requires a quad-channel digital buck controller compatible with DrMOS outputs. Consider the input voltage range of 4.75 V to 25 V and the 18 mA input current when designing the power supply circuitry. Evaluate the TQFN-EP-44 package constraints for thermal management and PCB layout. Since the part is obsolete, assess long-term supply chain risks and potential need for redesign.
Part Context
The XR77128 series belongs to MaxLinear's specialized PMIC portfolio, focusing on digital power management. This specific model serves as a successor or alternative to the XRP7724, offering enhanced integration with DrMOS technology. It falls under the category of DC-DC switching controllers and is intended for applications demanding precise digital control over multiple voltage rails.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. As the component is marked obsolete, consult MaxLinear or authorized distributors for current alternatives or end-of-life guidance.
