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
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
SOT-23-THN (DDC) 6 5 mm² 2.9 x 1.6
  • 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)
  • 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)

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.

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.

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Technical documentation

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Type Title Date
* Data sheet LM5050-1, LM5050-1-Q1 High-Side OR-ing FET Controller datasheet (Rev. F) 23 Dec 2019
Application note Basics of Ideal Diodes (Rev. B) 05 Oct 2021
E-book 11 Ways to Protect Your Power Path white paper 03 Jul 2019
Application note Basics of Power Switches (Rev. A) 26 Apr 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Technical article Who tampered with my PLC? Are industrial control systems too flexible? 05 Aug 2016
Application note Achieving Stable VGS Using LM5050-1 with Low Current and Noisy Input Supply 12 Feb 2015
User guide AN-2087 LM5050-1EVAL Evaluation Board (Rev. A) 06 May 2013

Design & development

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

Evaluation board

LM5050MK-1EVAL — Evaluation Board for the LM5050-1

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.

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Evaluation board

PSEMTHR24EVM-081 — Mother board for 24-port IEEE 802.3bt ready PSE system

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.

Simulation model

LM5050 Unencrypted PSPICE Transient Model

SNVM010.ZIP (347 KB) - PSpice Model
Simulation model

LM5050-1 TINA-TI Transient Spice Model

SNVM060.ZIP (8 KB) - TINA-TI Spice Model
Simulation model

LM5050-1 TINA-TI Transient Reference Design

SNVM061.TSC (132 KB) - TINA-TI Reference Design
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 (...)
Reference designs

TIDA-050026-23882 — 24-port (PoE 2, 2-pair) power sourcing equipment reference design for multi-port applications ;

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 (...)
Reference designs

TIDA-050026-23881 — 24-port (PoE 2, 4-pair) power sourcing equipment reference design for multi-port applications ;

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 (...)
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TIDA-010070 — Protected DC-bus input power and control power supply reference design for low-voltage servo drives

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 (...)
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TIDA-01552 — 8 Channel, 2-A High-Side Driver Reference Design for Digital Output Modules

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