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Product Detailed Parameters
- Description：IC REG CTRLR BUCK SMBUS 44TQFN
- Series：-
- Mfr：MaxLinear, Inc.
- Package：Tray,Tray
- 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 XR77128ELB-F is a synchronous buck DC-DC controller IC from MaxLinear, housed in a 44-pin TQFN (7x7 mm) package. It operates with an input supply voltage range of 5.5V to 25V and supports switching frequencies between 105kHz and higher values. The device features I2C and SMBus interface capabilities for digital control and monitoring. It is designed for operation within a junction temperature range of -40°C to +125°C.
Feature Summary
- Supports I2C and SMBus digital interfaces for configuration and monitoring
- Integrated synchronous buck controller architecture
- Wide operating junction temperature range suitable for industrial environments
Applications
- Industrial power supply systems
- Telecommunications infrastructure equipment
- Embedded computing platforms requiring regulated DC-DC conversion
Procurement Notes
Verify the specific suffix and tape/reel packaging requirements against the official datasheet before ordering. Confirm that the 44-TQFN footprint matches the target PCB design. Check for any recent Product Change Notifications regarding pinout or electrical parameter updates. Ensure compatibility with existing I2C/SMBus bus protocols in the system design.
Selection Notes
Select this component when a digitally programmable synchronous buck solution is required within a 5.5V to 25V input range. Consider the 44-TQFN package size constraints and thermal dissipation needs for the application environment. Verify that the target switching frequency aligns with the external inductor and capacitor selection guidelines provided in the technical documentation.
Part Context
This part belongs to the MaxLinear XR77128 series of power management ICs. It serves as a core component for multi-phase or single-phase step-down voltage regulation in complex electronic systems. The series is characterized by high integration and digital control features aimed at improving efficiency and system flexibility.
Replacement Considerations
Consult the official MaxLinear replacement guide for qualified alternatives. Cross-reference pinouts and electrical specifications carefully if substituting with other synchronous buck controllers.
