The LM25005 switching regulator features all of the functions necessary to implement an efficient, high voltage buck regulator using a minimum of external components. This easy to use regulator includes a 42V, 160mΩ, N-channel MOSFET, with an output current capability of 2.5A.
The regulator control method is based upon current mode control using an emulated current ramp. Current mode control provides inherent line voltage feed-forward, cycle-by-cycle current limiting, and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications.
The operating frequency is programmable from 50kHz to 500kHz. An oscillator synchronization pin allows multiple LM25005 regulators to self-synchronize or synchronize to an external clock.
Additional protection features include current limit, thermal shutdown, and remote shutdown capability. The device is available in a power-enhanced HTSSOP package featuring an exposed die attach pad to aid thermal dissipation.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM25005 42V, 2.5A Step-Down Switching Regulator datasheet (Rev. D) | PDF | HTML | 02 Dec 2025 |
| White paper | Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A) | 03 Jul 2018 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| White paper | Buck regulator topologies for wide input/output voltage differentials (Rev. A) | 15 Sep 2016 | ||
| EVM User's guide | AN-1749 LM25005 Evaluation Board (Rev. A) | 24 Apr 2013 |
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (PWP) | 20 | Ultra Librarian |
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