LM5106

100V Half Bridge Gate Driver with Programmable

Dead-Time

General Description

The LM5106 is a high voltage gate driver designed to drive

both the high side and low side N-Channel MOSFETs in a

synchronous buck or half bridge configuration. The floating

high side driver is capable of working with rail voltages up to

100V. The single control input is compatible with TTL signal

levels and a single external resistor programs the switching

transition dead-time through tightly matched turn-on delay

circuits. The robust level shift technology operates at high

speed while consuming low power and provides clean output

transitions. Under-voltage lockout disables the gate driver

when either the low side or the bootstrapped high side

supply voltage is below the operating threshold. The LM5106

is offered in the MSOP-10 or thermally enhanced 10-pin LLP

plastic package.

Features

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Drives both a high side and low side N-channel

MOSFET

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1.8A peak output sink current

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1.2A peak output source current

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Bootstrap supply voltage range up to 118V DC

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Single TTL compatible Input

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Programmable turn-on delays (Dead-time)

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Enable Input pin

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Fast turn-off propagation delays (32ns typical)

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Drives 1000pF with 15ns rise and 10ns fall time

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Supply rail under-voltage lockout

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Low power consumption

Typical Applications

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Solid State motor drives

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Half and Full Bridge power converters

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Two switch forward power converters

Package

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LLP-10 (4 mmx4mm)

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MSOP-10

Simplified Block Diagram

20175902

FIGURE 1.

January 2006

© 2006 National Semiconductor Corporation

DS201759

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