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B638DL NB638 NB* MPS IC Marking NBDN NBAP NBDJ NBCN
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Category: MPS ICs for Laptops
Availablity : In stock
Shipping : Yes
Description
NB638 / B638DL is an official MPS (Monolithic Power Systems) synchronous buck converter IC, widely used in laptop motherboards, GPU boards, high-current DC regulators and compact power rails.
It delivers high efficiency, stable output, and very low quiescent current, making it suitable for space-restricted and thermal-sensitive laptop power sections.
Supported Markings (Original MPS Codes)
This IC commonly comes with the following markings:
NBDN / NBAP / NBDJ / NBCN
All above markings are valid NB638 family identification codes used by MPS.
Specification
Technical Summary
- Type: High-efficiency synchronous buck converter IC
- Brand: MPS (Monolithic Power Systems)
- Package: QFN
- Marking: NBDN / NBAP / NBDJ / NBCN
- Application: CPU/GPU rails, system power supply, high-current DC regulators
- Features:
- Integrated high-side & low-side MOSFETs
- Precision reference & fast transient response
- Optimized for laptop and desktop VRM sections
- Very compact footprint & excellent thermal behavior
- Use Cases: Laptop motherboard repair, VRM stage replacement, DC-DC step-down applications
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