The NB675L is the low quiescent current version of the NB675 series from Monolithic Power Systems (MPS).

It provides a complete DDR power solution for DDR3, DDR3L, and LPDDR2 memory systems, integrating:

• A high-frequency synchronous buck converter (VDDQ)
• A 1.0A sink/source LDO (VTT)
• A low-noise buffered reference (VTTREF)

This IC is widely used in laptop motherboards, ultrabooks, AIO boards, and GPU/SoC memory rails where stable DDR power delivery is critical.

Technical Summary

• Low quiescent current version of NB675
• Delivers 10A continuous and 12A peak buck output
• Complete DDR power solution: VDDQ + VTT + VTTREF
• Wide input voltage range
• High-frequency synchronous rectified step-down converter
• Integrated 1.0A VTT sink/source LDO
• Ultra-low-noise VTTREF reference buffer
• Excellent load and line regulation
• Employs Constant-On-Time (COT) control for fast transient response
• Fully integrated design reduces external components
• Compact QFN package suitable for modern laptop PCB layouts
• IC Marking NBPB NBDD NBGO NBFN NBGD NBFE NBGC