
The MP4559 is a high frequency step-down switching regulator with integrated internal high-side high voltage power MOSFET. It provides 1.5A output with current mode control for fast loop response and easy compensation. The wide 3.8V to 55V input range accommodates a variety of step-down applications, including those in automotive input environment. A 12µA shutdown mode supply current allows use in battery-powered applications. High power conversion efficiency over a wide load range is achieved by scaling down the switching frequency at light load condition to reduce the switching and gate driving losses. The frequency foldback helps prevent inductor current runaway during startup and thermal shutdown provides reliable, fault tolerant operation. By switching at 2MHz, the MP4559 is able to prevent EMI (Electromagnetic Interference) noise problems, such as those found in AM radio and ADSL applications.The MP4559 is available in small 3mm x 3mm QFN10 and SOIC8 with exposed pad packages.
YG GROUP (YUGUANG INTERNATIONAL(HK)CO.,LTD) supports reliable sourcing through quality controls and compliance documentation. Please confirm product requirements, applicable certifications and supporting documents before ordering.
MP4559DQ-LF-Z is an authentic electronic component manufactured by Monolithic Power Systems, categorized under Power Management ICs. It is supplied in the standard manufacturer-specified package footprint, providing industry-standard mechanical dimensions and terminal configurations for board-level assembly. Full pinout configurations, physical footprint drawings, and rated operating tolerances are documented in the official MP4559DQ-LF-Z datasheet above.
Electronic component spot-market pricing for MP4559DQ-LF-Z fluctuates based on real-time global availability, production date codes, minimum order quantities (MOQ), and packaging formats (e.g., Reel, Tube, Tray). Using an RFQ ensures you receive accurate, real-time volume pricing tied to verified, traceable inventory rather than stale catalog estimates.
Lead times for MP4559DQ-LF-Z depend on whether stock is dispatched from our central hub or regional franchise partners. Ready-to-ship inventory typically leaves the warehouse within 1–3 business days following quality inspection, while factory-direct or back-ordered allocations are confirmed with an estimated ship date upon RFQ reply.
Loading articles…
Loading related products…
| Picture | Part Number | Manufacturer | PDF / RoHS | Stock | Action |
|---|---|---|---|---|---|
![]() | Monolithic Power Systems | -- | 5,270 | ||
![]() | Monolithic Power Systems | 6,020 | |||
![]() | Monolithic Power Systems | -- | 2,540 | ||
![]() | Monolithic Power Systems | 6,980 | |||
![]() | Monolithic Power Systems | -- | 5,890 | ||
![]() | Monolithic Power Systems | -- | 1,540 | ||
![]() | Monolithic Power Systems | 2,680 | |||
![]() | Monolithic Power Systems | 7,800 | |||
![]() | Monolithic Power Systems | -- | 8,050 | ||
![]() | Monolithic Power Systems | 7,050 |
Loading articles…

Choosing OPA2227U/2K5? Compare bipolar and FET input trade-offs, source-current error and OPA2228 gain stability for the sensor BOM. Request a quote.
Read more →
Need FT232RL-REEL for a released BOM? Compare replenishment with FT232RNL migration, including clock and startup checks. Request a quote.
Read more →
Sourcing GCM155R71H103KA55D? Check its 10 nF/50 V X7R rating, D-code reel and automotive documentation before release. Request a quote.
Read more →
Reordering W25Q32JVSSIQ? Compare QE defaults, wide-body SOP-8 geometry and NRND guidance to protect the released boot design. Request a quote.
Read more →