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Product details

Parameters

Bus voltage (Max) (V) 90 Power switch MOSFET Input VCC (Min) (V) 8 Input VCC (Max) (V) 14 Peak output current (A) 1 Rise time (ns) 15 Operating temperature range (C) -40 to 125 Rating Catalog Number of channels (#) 2 Fall time (ns) 15 Prop delay (ns) 25 Iq (uA) 10 Input threshold TTL Channel input logic TTL Negative voltage handling at HS pin (V) -1 Features open-in-new Find other Half-bridge drivers

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 WSON (NGT) 8 16 mm² 4 x 4 open-in-new Find other Half-bridge drivers

Features

  • Drives Both a High-Side and Low-Side N-Channel MOSFET
  • 1-A Peak Output Current (1.0-A Sink and 1.0-A Source)
  • Inputs Compatible With Independent TTL and CMOS
  • Bootstrap Supply Voltage to 108-V DC
  • Fast Propagation Times (30 ns Typical)
  • Drives 1000-pF Load With 15-ns Rise and Fall Times
  • Excellent Propagation Delay Matching (2 ns Typical)
  • Supply Rail Undervoltage Lockout
  • Low Power Consumption
  • 8-Pin SOIC and Thermally-Enhanced 8-Pin WSON Package
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Description

The LM5109B device is a cost-effective, 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 floating high-side driver is capable of working with rail voltages up to 90 V. The outputs are independently controlled with cost-effective TTL and CMOS-compatible input thresholds. The robust level shift technology operates at high speed while consuming low power and providing clean level transitions from the control input logic to the high-side gate driver. Undervoltage lockout is provided on both the low-side and the high-side power rails. The device is available in the 8-pin SOIC and thermally-enhanced 8-pin WSON packages.

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LM5102 ACTIVE 2-A, 100-V half bridge gate driver with 8-V UVLO and programmable delay This product adds programmable rising-edge delay with similar current drive specs.
LM5104 ACTIVE 2-A, 100-V half bridge gate driver with 8-V UVLO and adaptive delay This product adds resistor-programmable dead-time and an integrated bootstrap diode with a single PWM input.

Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet LM5109B High Voltage 1-A Peak Half-Bridge Gate Driver datasheet (Rev. C) Oct. 15, 2015
Application notes External Gate Resistor Selection Guide (Rev. A) Feb. 28, 2020
Application notes Understanding Peak IOH and IOL Currents (Rev. A) Feb. 28, 2020
More literature Fundamentals of MOSFET and IGBT Gate Driver Circuits (Replaces SLUP169) (Rev. A) Oct. 29, 2018
Technical articles How to achieve higher system robustness in DC drives, part 3: minimum input pulse Sep. 19, 2018
Technical articles How to achieve higher system robustness in DC drives, part 2: interlock and deadtime May 30, 2018
Technical articles Boosting efficiency for your solar inverter designs May 24, 2018
Application notes AN-1317 Selection of External Bootstrap Diode for LM510X Devices (Rev. B) May 04, 2018
Technical articles How to achieve higher system robustness in DC drives, part 1: negative voltage Apr. 17, 2018
User guides AN-1299 LM5041 Evaluation Board (Rev. A) May 06, 2013
User guides AN-1331 LM5033 Evaluation Board (Rev. A) May 06, 2013

Design & development

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Design tools & simulation

SIMULATION MODELS Download
SNVMAM7.ZIP (75 KB) - PSpice Model
SIMULATION MODELS Download
SNVMAM8.ZIP (3 KB) - PSpice Model
SIMULATION TOOLS Download
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 (...)
Features
  • 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

REFERENCE DESIGNS Download
Digitally Controlled Non-Isolated DC/DC Buck Converter Reference Design
TIDM-DC-DC-BUCK The purpose of this design is to demonstrate digital power control using a C2000™ microcontroller and evaluate the powerSUITE Digital Power software tools. The design consists of two separate boards:
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
WSON (NGT) 8 View options

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