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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 XR77128ELBMTR-F is a quad-channel programmable digital buck controller from MaxLinear, designed for high-density power applications. It operates within an input voltage range of 4.75 V to 25 V and supports switching frequencies between 105 kHz and 1.23 MHz. The device features synchronous rectification and is rated for junction temperatures from -40°C to +125°C. Packaged in a TQFN-EP-44 format, it serves as a specialized PMIC solution intended for upgrade paths to DrMOS output configurations.
Feature Summary
- Quad-channel programmable digital control architecture
- Synchronous rectification capability for improved efficiency
- Wide operating temperature range suitable for industrial environments
Applications
- High-density server power supplies
- Industrial automation systems
- Telecommunications infrastructure equipment
Procurement Notes
Verify component authenticity through authorized channels due to end-of-life status. Confirm package integrity and pin alignment against the TQFN-EP-44 specification. Review Product Change Notifications (PCN) for any manufacturing updates. Ensure compatibility with existing board layouts before procurement. Validate thermal performance requirements against the specified junction temperature limits.
Selection Notes
Select this component when a multi-phase digital buck solution is required with flexible frequency programming. Consider the transition path to DrMOS outputs if higher integration is needed later. Evaluate the 4.75 V to 25 V input range against system power rails. Assess the need for digital programmability versus fixed analog alternatives. Verify that the TQFN-EP-44 footprint fits the mechanical constraints.
Part Context
This part belongs to the XR77128 series of professional power management ICs. It is manufactured by MaxLinear, Inc., which specializes in mixed-signal semiconductor solutions. The series targets advanced power delivery networks requiring precise digital control. Related development tools include the XR77128EVB-DEMO-1 evaluation kit for performance validation.
Replacement Considerations
Public documentation indicates this product is obsolete. No specific substitute part numbers are confirmed in the provided source material. Consult manufacturer engineering support for validated alternative components.
