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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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Technical documentation

Design & development

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

Design tools & simulation

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

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

Ordering & quality

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