Product details


Vin (Min) (V) 5 Vin (Max) (V) 75 Features AUX input, Linear control Iq (Typ) (mA) 0.4 Iq (Max) (mA) 0.72 IGate source (Typ) (uA) 31 IGate source (Max) (uA) 41 IGate sink (Typ) (mA) 2.8 IGate pulsed (Typ) (A) 2.8 Operating temperature range (C) -40 to 125 IReverse (Typ) (uA) VSense reverse (Typ) (mV) -28 /-41 Design support EVM, Simulation Model Rating Catalog Channel(s) controlled (#) 1 FET External VGS (Max) (V) 14 open-in-new Find other Ideal diode/ORing controllers

Package | Pins | Size

SOT-23-THN (DDC) 6 5 mm² 2.9 x 1.6 open-in-new Find other Ideal diode/ORing controllers


  • Available in Standard and AEC-Q100 Qualified Versions LM5050Q0MK-1 (up to 150°C TJ) and LM5050Q1MK-1 (up to 125°C TJ)
  • Functional safety capable
    • Documentation available to aid functional safety system design
  • Wide Operating Input Voltage Range, VIN: 1 V to 75 V (VBIAS required for VIN < 5 V)
  • 100-V Transient Capability
  • Charge Pump Gate Driver for External N-Channel MOSFET
  • Fast 50-ns Response to Current Reversal
  • 2-A Peak Gate Turnoff Current
  • Minimum VDS Clamp for Faster Turnoff
  • Package: SOT-6 (Thin SOT-23-6)

All trademarks are the property of their respective owners.

open-in-new Find other Ideal diode/ORing controllers


The LM5050-1/-Q1 High 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 ORing controller allows MOSFETs to replace diode rectifiers in power distribution networks thus reducing both power loss and voltage drops.

The LM5050-1/-Q1 controller provides charge pump 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 LM5050-1/-Q1 can connect power supplies ranging from 5 V to 75 V and can withstand transients up to 100 V.

open-in-new Find other Ideal diode/ORing controllers
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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet LM5050-1, LM5050-1-Q1 High-Side OR-ing FET Controller datasheet (Rev. F) Dec. 23, 2019
E-book 11 Ways to Protect Your Power Path white paper Jul. 03, 2019
Application note Basics of Ideal Diodes May 09, 2019
Application note Basics of Power Switches (Rev. A) Apr. 26, 2019
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical articles How to simulate a load switch circuit with varying input voltages and loads Nov. 14, 2016
Technical articles How to protect your server from hot swap events Aug. 08, 2016
Technical articles Who tampered with my PLC? Are industrial control systems too flexible? Aug. 05, 2016
Technical articles Simplify digital hot swap design using the PI-Commander GUI Jun. 06, 2016
Application note Achieving Stable VGS Using LM5050-1 with Low Current and Noisy Input Supply Feb. 12, 2015
User guide AN-2087 LM5050-1EVAL Evaluation Board (Rev. A) May 06, 2013

Design & development

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

Hardware development


The LM5050-1 evaluation board is designed to demonstrate the capabilities of the LM5050-1 OR-ing Diode Controller. One high side N-channel power MOSFET is used. The evaluation board is designed to highlight applications with a small solution size.



  • Assembled LM5050MK-1EVAL Board

PSEMTHR24EVM-081 is the base board for the TPS23881 and TPS23882 PSE controllers. This board contains 24 2-Pair / 4-Pair ports that can that can be used to send up to 30W/port for IEEE 802.3at applications and up to 90W/port for IEEE 802.3bt applications.

  • 24 port PoE PSE system and expandable to 48 ports
  • Highly flexible system with configurable GUI and host interface
  • Multiport power management
  • IEEE802.3bt compliance
  • Mutiple power supplies
  • Supporting legacy powered devices

Design tools & simulation

SNVM010.ZIP (347 KB) - PSpice Model
SNVM060.ZIP (8 KB) - TINA-TI Spice Model
SNVM061.TSC (132 KB) - TINA-TI Reference Design
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

EtherCAT P® One Cable for Power and EtherCAT® Reference Design
TIDA-01461 This reference design shows a physical implementation of the power couple in circuitry of an EtherCAT P® power sourcing device. The reference design is designed to meet all requirements from the official EtherCAT P implementation guide. This includes features like reverse polarity protection (...)
document-generic Schematic
24-port (PoE 2, 2-pair) power sourcing equipment reference design for multi-port applications
TIDA-050026-23882 — This reference design showcases a Type-3, 30W, 2-Pair 24-port Ethernet switch for Power over Ethernet (PoE) applications which can send up to 30W per port for IEEE 802.3bt Type 3 applications and up to 60W per port for non-standard applications. Based on the MSP430F523x family, TI's TPS2388x FirmPSE (...)
document-generic Schematic
24-port (PoE 2, 4-pair) power sourcing equipment reference design for multi-port applications
TIDA-050026-23881 — This reference design showcases a Type-4 (PoE 2, 4-Pair) 24-port Ethernet switch for Power over Ethernet (PoE) applications which can send up to 90W per port for for IEEE 802.3bt (PoE 2) applications and up to 120W per port for non-standard applications. Based on the MSP430F523x family, our (...)
document-generic Schematic
Protected DC-bus input power and control power supply reference design for low-voltage servo drives
TIDA-010070 — This reference design uses an ORing controller, the LM5050-1 to provide protection against reverse polarity and reverse current. In conjunction, the LM5069 hot swap controller is used for overcurrent, over voltage, under voltage protection, and inrush current limitation. The design also features (...)
document-generic Schematic
8 Channel, 2-A High-Side Driver Reference Design for Digital Output Modules
TIDA-01552 — This eight-channel, parallel, 2-A, high-side, digital output reference design for factory automation applications like PLCs shows the diagnostic features and the power density of new Texas Instruments high-side driver components (such as TPS27S100). Each output can individually measure the output (...)
document-generic Schematic
24VDC 10A eFuse and Protection Circuit for Programmable Logic Controllers (PLC)
TIDA-00233 This sub system design shows an IC based implementation of  over voltage, over current, reverse current,  reverse polarity and miss wire protection which is more accurate, lower power and faster compared to fuses, PTCs and diodes. Programmable Logic Controller (PLC) I/O modules connected (...)
document-generic Schematic
Automotive Boost Converter Reference Design with Reverse Battery Protection
PMP7936 — PMP7936 is a boost converter capable of 138W output power and targeted for automotive appli-cations. This design uses the LM5122 synchronous boost current-mode PWM controller. The circuit will start at a minimum input of 6.5V and has an operating input voltage range of 4.5V to 42V. The output is (...)

CAD/CAE symbols

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SOT-23-THIN (DDC) 6 View options

Ordering & quality

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