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LM2105

ACTIVE

107-V 0.5-A/0.8-A half-bridge gate driver with 5-V UVLO and integrated bootstrap diode

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Data sheet

LM2105

ACTIVE
Data sheet Order now

Product details

Bootstrap supply voltage (max) (V) 107 Power switch IGBT, MOSFET Input supply voltage (min) (V) 5 Input supply voltage (max) (V) 18 Peak output current (A) 0.65 Operating temperature range (°C) -40 to 125 Undervoltage lockout (typ) (V) 5 Rating Catalog Propagation delay time (µs) 0.125 Rise time (ns) 28 Fall time (ns) 18 Iq (mA) 0.0333 Input threshold CMOS, TTL Channel input logic Noninverting Switch node voltage (V) -1 Features Integrated bootstrap diode Driver configuration Dual inputs
Bootstrap supply voltage (max) (V) 107 Power switch IGBT, MOSFET Input supply voltage (min) (V) 5 Input supply voltage (max) (V) 18 Peak output current (A) 0.65 Operating temperature range (°C) -40 to 125 Undervoltage lockout (typ) (V) 5 Rating Catalog Propagation delay time (µs) 0.125 Rise time (ns) 28 Fall time (ns) 18 Iq (mA) 0.0333 Input threshold CMOS, TTL Channel input logic Noninverting Switch node voltage (V) -1 Features Integrated bootstrap diode Driver configuration Dual inputs
SOIC (D) 8 29.4 mm² 4.9 x 6 WSON (DSG) 8 4 mm² 2 x 2
  • Drives two N-channel MOSFETs in half-bridge configuration
  • Integrated bootstrap diode
  • 5-V typical undervoltage lockout on GVDD
  • 107-V absolute maximum voltage on BST
  • –19.5-V absolute maximum negative transient voltage handling on SH
  • 0.5-A/0.8-A peak source/sink currents
  • 115-ns typical propagation delay
  • Drives two N-channel MOSFETs in half-bridge configuration
  • Integrated bootstrap diode
  • 5-V typical undervoltage lockout on GVDD
  • 107-V absolute maximum voltage on BST
  • –19.5-V absolute maximum negative transient voltage handling on SH
  • 0.5-A/0.8-A peak source/sink currents
  • 115-ns typical propagation delay

The LM2105 is a compact, high-voltage gate driver designed to drive both the high-side and the low-side N-channel MOSFETs in a synchronous buck or a half-bridge configuration. The integrated bootstrap diode saves board space and reduces system cost by eliminating the need for an external discrete diode.

The –1-V DC and –19.5-V transient negative voltage handling on the SH pin improve the system robustness in high noise applications. The small, thermally-enhanced 8-pin WSON package improves PCB layout by allowing the driver to be placed closer to the motor phases. The LM2105 is also available in an 8-pin SOIC package compatible with industry standard pinouts. Undervoltage lockout (UVLO) is provided on both the low-side and the high-side power rails for protection during power up and power down.

The LM2105 is a compact, high-voltage gate driver designed to drive both the high-side and the low-side N-channel MOSFETs in a synchronous buck or a half-bridge configuration. The integrated bootstrap diode saves board space and reduces system cost by eliminating the need for an external discrete diode.

The –1-V DC and –19.5-V transient negative voltage handling on the SH pin improve the system robustness in high noise applications. The small, thermally-enhanced 8-pin WSON package improves PCB layout by allowing the driver to be placed closer to the motor phases. The LM2105 is also available in an 8-pin SOIC package compatible with industry standard pinouts. Undervoltage lockout (UVLO) is provided on both the low-side and the high-side power rails for protection during power up and power down.
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Technical documentation

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* Data sheet LM2105 107-V, 0.5-A, 0.8-A Half-Bridge Driver with 5-V UVLO and Integrated Bootstrap Diode datasheet (Rev. C) PDF | HTML 09 Sep 2023
Application note Riding the Wave of Non-Isolated Gate Drivers in LEVs PDF | HTML 14 Nov 2025
Application brief Why Low-Side Gate Drivers are Better Than Discrete Designs PDF | HTML 13 Nov 2025
Application note Applying Non-isolated Gate Drivers in Your Home Tool and Accessory Designs PDF | HTML 16 May 2025
Application note Benefits and Use of Single Input Gate Drivers with Programmable Dead Time PDF | HTML 23 Apr 2025
Product overview LM2x0x: TI's First 2mm by 2mm Half-Bridge Gate Driver PDF | HTML 10 Apr 2025
Application note Mapping Application Requirements with the 120V Halfbridge Gate Driver (Rev. A) PDF | HTML 04 Apr 2025
Application note Using Half-Bridge Gate Driver to Achieve 100% Duty Cycle for High Side FET PDF | HTML 25 Mar 2024
Application note Challenges and Solutions for Half-Bridge Gate Drivers in Bidirectional DC-DC Converters PDF | HTML 24 Jan 2024
Application note How to Choose a Gate Driver for DC Motor Drives PDF | HTML 05 Oct 2023
Application note Bootstrap Circuitry Selection for Half Bridge Configurations (Rev. A) PDF | HTML 08 Sep 2023
Certificate LM2105EVM EU RoHS Declaration of Conformity (DoC) 01 Feb 2023
Application note Comparative Analysis of Two Different Methods for Gate-Drive Current Boosting (Rev. A) PDF | HTML 17 Feb 2022
Application note Voltage Fed Full Bridge DC-DC & DC-AC Converter High-Freq Inverter Using C2000 (Rev. D) 07 Apr 2021
Application note Implementing High-Side Switches Using Half-Bridge Gate Drivers for 48-V Battery. 12 May 2020
Application brief External Gate Resistor Selection Guide (Rev. A) 28 Feb 2020
Application brief Understanding Peak IOH and IOL Currents (Rev. A) 28 Feb 2020
Application brief Small Price Competitive 100-V Driver for 48-V BLDC Motor Drives 22 Oct 2019
Application note Maximizing DC/DC converter designs with UCC27282 18 Jan 2019
Application note UCC27282 Improving motor drive system robustness 11 Jan 2019

Design & development

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Evaluation board

LM2105EVM — LM2105 evaluation module for 105-V half-bridge driver with integrated bootstrap diode

The LM2105 evaluation module (EVM) is a platform for evaluating LM2105 performance. LM2105 is a 105-V, boot-voltage, high-side, low-side driver with 0.5-A peak source and 0.8-A sink current for driving two N-channel metal–oxide–semiconductor field-effect transistors (MOSFETs). The same (...)

User guide: PDF | HTML
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Simulation model

LM2105 PSpice Model (LM2105DR) (Rev. A)

SNVMCD8A.ZIP (23 KB) - PSpice Model
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Calculation tool

LM2X0X-CALC — LM2x0x Schematic Review Template

LM2x0x Schematic Review Template (zip)
Supported products & hardware

Supported products & hardware
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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 (...)
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SOIC (D) 8 Ultra Librarian
WSON (DSG) 8 Ultra Librarian
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