Product
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LM5051
  • LM5051
  • LM5051
  • LM5051

LM5051

ACTIVE

-6-V to -100-V 690-uA IQ ORing FET controller

Texas Instruments LM5051 Product Info

1 April 2026 2

Parameters

Vin (max) (V)

100

Vin (min) (V)

-6

FET

External single FET

Device type

ORing controller

Number of channels

1

Rating

Catalog

Features

FET test, Linear control, Power good signal, Reverse current blocking

Imax (A)

250

Iq (typ) (mA)

0.69

Iq (max) (mA)

0.78

IGate source (typ) (µA)

660

IGate source (max) (µA)

950

IGate sink (typ) (mA)

3.5

IGate pulsed (typ) (A)

3.5

Operating temperature range (°C)

-40 to 125

VSense reverse (typ) (mV)

-45

Design support

EVM, Simulation Model

Shutdown current (ISD) (mA) (A)

0.1

Product type

ORing controller

Package

SOIC (D)-8-29.4 mm² 4.9 x 6

Features

  • 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.

Description

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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