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NCV81277DMNTXG
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Product Detailed Parameters
- Description：NCV81277DMNTXG
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR),Tape & Reel (TR),Cut Tape (CT)
- Output Type：PWM
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：1
- Output Phases：4
- Voltage - Supply (Vcc/Vdd)：4.5V ~ 20V
- Frequency - Switching：250kHz ~ 1.2MHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：I2C, PSI
- Control Features：-
- Operating Temperature：-40°C ~ 105°C (TA)
- Mounting Type：Surface Mount, Wettable Flank
- Package / Case：40-VFQFN Exposed Pad
- Supplier Device Package：40-QFNW (5x5)
- Grade：-
- Qualification：-
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Overview
The NCV81277DMNTXG is a synchronous buck DC-DC switching controller manufactured by onsemi. It features four output phases and supports I2C and PSI serial interfaces for configuration. The device operates within an input voltage range of 4.5V to 20V and offers a programmable switching frequency between 250kHz and 1.2MHz. It utilizes a 40-pin QFNW (5x5mm) package with exposed pad, designed for surface-mount installation. The component is rated for an operating temperature range from -40°C to +105°C.
Feature Summary
- Supports four-phase synchronous buck topology for high-current applications
- Enables digital control via integrated I2C and PSI serial communication interfaces
- Features clock synchronization capability for multi-device phase shifting
- Includes wettable flank design in the QFNW package for enhanced inspection
Applications
- High-performance computing systems requiring multi-phase power delivery
- Telecommunications infrastructure power supplies
- Industrial equipment power management subsystems
- Automotive electronic control units (ECUs)
Procurement Notes
Verify the specific suffix 'DMNTXG' against official onsemi documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with required I2C/PSI interface protocols during system integration. Confirm that the 40-QFNW footprint matches the target PCB layout constraints. Check current availability status as supply levels may fluctuate.
Selection Notes
Select this controller when designing multi-phase power stages requiring digital programmability. Consider the 4.5V to 20V input range and up to 1.2MHz frequency for efficiency optimization. Evaluate thermal requirements given the 105°C rating and four-phase operation. Compare against single-phase alternatives if lower current demands exist.
Part Context
This component belongs to the NCV81277D series of professional power management ICs. It is part of onsemi's portfolio of synchronous buck controllers designed for demanding applications. The automotive-grade variant distinguishes itself through extended reliability standards and specific packaging options suitable for harsh environments.
Replacement Considerations
Consult official cross-reference lists for direct substitutes. Verify pinout compatibility and electrical parameters before substitution. Ensure any replacement maintains support for I2C and PSI interfaces.
