NCP81151MNTBG NCP81151 Marking A3* IC

The NCP81151 Power Management IC, commonly found with the marking A3* and part number NCP81151MNTBG, is a high-performance multi-phase PWM voltage regulator controller (VRM) from On Semiconductor (onsemi). This IC is widely used in laptop motherboards, desktop boards, and high-performance computing systems where precise and stable power delivery is required.

NCP81151 is designed to manage CPU and GPU power rails, providing accurate voltage regulation, load control, and power sequencing for modern processors. Its advanced control architecture helps maintain system stability under dynamic load conditions and thermal stress. The IC is frequently replaced during chip-level motherboard repair to fix issues such as no power, unstable booting, or voltage fluctuation faults.

At OKSpare, all NCP81151 ICs are quality tested before dispatch. IC ready stock OKSpare ensures reliable supply from Nehru Place, Delhi.

Technical Summary

• Multi-phase PWM voltage regulator controller IC

• Used for CPU and GPU power management

• Supports stable and efficient DC-DC conversion

• Marking A3* commonly found on chip

• Suitable for chip-level repair and replacement