Product details


Vin (Min) (V) 6 Vin (Max) (V) 75 Features FET test, Linear control Iq (Typ) (mA) 0.4 Iq (Max) (mA) 0.72 IGate source (Typ) (uA) 32 IGate source (Max) (uA) 45 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, Reference Design, Simulation Model Rating Catalog Channel(s) controlled (#) 1 FET External VGS (Max) (V) 14.7 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


  • Wide Operating Input Voltage Range: +6V to +75V
  • +100 Volt Transient Capability
  • Charge Pump Gate Driver for External N-Channel MOSFET
  • MOSFET Diagnostic Test Mode
  • Fast 50ns Response to Current Reversal
  • 2A Peak Gate Turn-off Current
  • Minimum VDS Clamp for Faster Turn-off
  • Package: SOT-6 (Thin SOT23-6)

All trademarks are the property of their respective owners.

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The LM5050-2 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 OR-ing controller allows MOSFETs to replace diode rectifiers in power distribution networks thus reducing both power loss and voltage drops.

The LM5050-2 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 LM5050-2 can connect power supplies ranging from +6V to +75V and can withstand transients up to +100V.

The LM5050-2 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 LM5050-2 High Side OR-ing FET Controller datasheet (Rev. B) Mar. 08, 2013
Application note Basics of Ideal Diodes (Rev. A) Feb. 17, 2021
E-book 11 Ways to Protect Your Power Path white paper Jul. 03, 2019
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
User guide AN-2051 LM5050-2EVAL 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

document-generic User guide

The LM5050-2 evaluation board is designed to demonstrate the capabilities of the LM5050-2 OR-ing Diode Controller. It is intended for evaluation of the functions of the LM5050-2.

Design tools & simulation

SNVM010.ZIP (347 KB) - PSpice Model
SNVM062.ZIP (11 KB) - TINA-TI Spice Model
SNVM063.TSC (85 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
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Reference designs

High efficiency power supply architecture reference design for protection relay processor module
TIDA-010011 — This reference design showcases various power architectures for generating multiple voltage rails for an application processor module, requiring >1A load current and high efficiency . The required power supply is generated using 5-, 12- or 24-V DC input from the backplane. Power supplies are (...)
document-generic Schematic
100W, 24V High Efficiency High PF Industrial Power Supply with Precision Current & Power Limit
TIDA-00701 TIDA-00701 is a 100W, 24V, Industrial AC-DC power supply designed for use in Industrial & Instrumentation systems such as process controls, factory automation and machinery control. This reference design has front end Power Factor Correction (PFC) circuit designed using UCC28051 PFC controller (...)
document-generic Schematic
60W, 24V High Efficiency Industrial Power Supply with Precision Voltage, Current and Power Limit
TIDA-00702 The TIDA-00702 is a 60-W, industrial AC-DC power supply designed for use in industrial and instrumentation systems such as process controls, factory automation, and machinery control. This reference design is a Quasi-resonant (QR) flyback converter implemented using the UCC28740 CC-CV flyback (...)
document-generic Schematic
12Vin ORing Circuit Design (12V@7.5A)
PMP7824 — A 12V nominal OR-ing circuit design, allowing users to select one of the two input supplies to be directed as the power supply to a system.
Design files

CAD/CAE symbols

Package Pins Download
SOT-23-THIN (DDC) 6 View options

Ordering & quality

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