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NCP81276MNTXG
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Product Detailed Parameters
- Description：IC SYNC BUCK CTLR 4PHASE 40QFN
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：PWM Signal
- Function：Step-Down
- Output Configuration：Positive and Negative
- Topology：Buck
- Number of Outputs：4
- Output Phases：4
- Voltage - Supply (Vcc/Vdd)：4.5V ~ 20V
- Frequency - Switching：250kHz ~ 1.2MHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：No
- Clock Sync：No
- Serial Interfaces：I2C, PSI
- Control Features：Current Limit, Enable, Frequency Control, Power Good, Ramp, Soft Start
- Operating Temperature：-10°C ~ 100°C (TA)
- Mounting Type：Surface Mount
- Package / Case：40-VFQFN Exposed Pad
- Supplier Device Package：40-QFN (5x5)
- Grade：-
- Qualification：-
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Overview
The NCP81276MNTXG is a high-efficiency, synchronous buck controller designed for demanding computing applications. It integrates dual high-side and low-side drivers capable of delivering up to 40A per phase with precise current sharing. The device supports multiple output voltage rails and features comprehensive protection mechanisms including over-current, over-voltage, and thermal shutdown. Its compact 32-lead QFN package facilitates dense PCB layouts while maintaining robust thermal performance for server and storage systems.
Feature Summary
- Integrated dual-phase synchronous buck control architecture
- Advanced digital interface for dynamic voltage scaling
- Built-in protection against over-current and thermal events
Applications
- Server power supply modules
- Storage area network controllers
- High-performance computing boards
Procurement Notes
Verify the complete part number including suffixes such as 'G' for lead-free status and 'Tape & Reel' packaging designation when ordering. Confirm that the specific revision matches your design requirements. Ensure compatibility with existing gate drive voltages and feedback networks before finalizing procurement.
Selection Notes
Select this component for designs requiring high current density and tight transient response. Evaluate thermal dissipation capabilities based on ambient conditions and PCB copper area. Compare pinout compatibility with legacy controllers if replacing existing designs. Verify support for required communication protocols like PMBus or I2C.
Part Context
This controller belongs to onsemi's NCP81xxx series of multi-phase buck regulators. It complements other devices in the family by offering integrated driver stages and simplified external component count. The series targets enterprise-grade infrastructure where reliability and efficiency are critical.
Replacement Considerations
Check for direct pin-to-pin replacements within the same product family. Verify electrical parameter equivalence for input voltage range and maximum current capability. Assess software configuration compatibility if migrating between different revisions.
