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The LM5051 Low Side OR-ing FET Controller operates in conjunction with an external MOSFET as an ideal diode rectifier when connected in series with a power source. This OR-ing controller allows MOSFETs to replace diode rectifiers in power distribution networks thus reducing both power loss and voltage drops.
The LM5051 controller provides gate drive for an external N-Channel MOSFET and a fast response comparator to turn off the FET when current flows in the reverse direction. The LM5051 can connect power supplies ranging from -6V to -100V and can withstand transients up to -100V.
The LM5051 also provides a FET test diagnostic mode which allows the system controller to test for shorted MOSFETs.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM5051 Low Side OR-ing FET Controller datasheet (Rev. D) | 21 Mar 2013 | |
| Application note | Basics of Ideal Diodes (Rev. B) | PDF | HTML | 05 Oct 2021 | |
| E-book | 11 Ways to Protect Your Power Path | 03 Jul 2019 | ||
| Application note | Basics of Power Switches (Rev. A) | PDF | HTML | 26 Apr 2019 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| User guide | AN-2148 LM5051MAEVAL Evaluation Board (Rev. B) | 06 May 2013 |
For additional terms or required resources, click any title below to view the detail page where available.
The LM5051 evaluation board is designed to demonstrate the capabilities of the LM5051 OR-ing Diode Controller. One lowside N-channel power MOSFET is used per channel. The evaluation board is designed to highlight applications with a small solution size.
| Package | Pins | Download |
|---|---|---|
| SOIC (D) | 8 | View options |
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