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Product details

Parameters

Vin (Min) (V) 6 Vin (Max) (V) 75 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 Features FET Test, Linear Control 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 VGS (Max) (V) 14.7 FET External 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

Features

  • 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)

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Description

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
* Datasheet LM5050-2 High Side OR-ing FET Controller datasheet (Rev. B) Mar. 08, 2013
White papers 11 Ways to Protect Your Power Path white paper Jul. 03, 2019
Application notes Basics of Ideal Diodes May 09, 2019
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical articles How can a load switch extend your device’s battery life? Mar. 20, 2018
Technical articles How and why you should use load switches for power sequencing Feb. 06, 2018
Technical articles How to use load switches and eFuses in your set-top box design Nov. 23, 2017
Technical articles Don’t leave it floating! Power off your outputs with quick output discharge Dec. 09, 2016
User guides 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

EVALUATION BOARDS Download
document-generic User guide
$49.00
Description
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

SIMULATION MODELS Download
SNVM010.ZIP (347 KB) - PSpice Model
SIMULATION MODELS Download
SNVM062.ZIP (11 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SNVM063.TSC (85 KB) - TINA-TI Reference Design

Reference designs

REFERENCE DESIGNS Download
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 document-generic User guide
REFERENCE DESIGNS Download
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 document-generic User guide
REFERENCE DESIGNS Download
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 document-generic User guide
REFERENCE DESIGNS Download
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

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