Product details

Vin (Min) (V) -6 Vin (Max) (V) 100 Features FET test, Linear control Iq (Typ) (mA) 0.69 Iq (Max) (mA) 0.78 IGate source (Typ) (uA) 660 IGate source (Max) (uA) 950 IGate sink (Typ) (mA) 3.5 IGate pulsed (Typ) (A) 3.5 Operating temperature range (C) -40 to 125 IReverse (Typ) (uA) VSense reverse (Typ) (mV) -45 Design support EVM, Simulation Model Rating Catalog Channel(s) controlled (#) 1 FET External
Vin (Min) (V) -6 Vin (Max) (V) 100 Features FET test, Linear control Iq (Typ) (mA) 0.69 Iq (Max) (mA) 0.78 IGate source (Typ) (uA) 660 IGate source (Max) (uA) 950 IGate sink (Typ) (mA) 3.5 IGate pulsed (Typ) (A) 3.5 Operating temperature range (C) -40 to 125 IReverse (Typ) (uA) VSense reverse (Typ) (mV) -45 Design support EVM, Simulation Model Rating Catalog Channel(s) controlled (#) 1 FET External
SOIC (D) 8 19 mm² 4.9 x 3.9
  • Wide operating input voltage range: -6V to -100V
  • -100V Transient Capability
  • Gate drive for external N-Channel MOSFET
  • MOSFET diagnostic test mode
  • Fast 50ns response to current reversal
  • 2A peak gate turn-off current
  • Package: 8-Lead SOIC

All trademarks are the property of their respective owners.

  • Wide operating input voltage range: -6V to -100V
  • -100V Transient Capability
  • Gate drive for external N-Channel MOSFET
  • MOSFET diagnostic test mode
  • Fast 50ns response to current reversal
  • 2A peak gate turn-off current
  • Package: 8-Lead SOIC

All trademarks are the property of their respective owners.

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.

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.

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Technical documentation

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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

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LM5051MAEVAL — Evaluation Board for the LM5051

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.

User guide: PDF
Not available on TI.com
Simulation model

LM5051 TINA-TI Transient Reference Design (Rev. A)

SNVM465A.TSC (361 KB) - TINA-TI Reference Design
Simulation model

LM5051 TINA-TI Transient Spice Model (Rev. A)

SNVM466A.ZIP (23 KB) - TINA-TI Spice Model
Simulation model

LM5051 Unencrypted PSpice Transient Model Package (Rev. B)

SNVM467B.ZIP (51 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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