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HO

DRIVER

HB

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EDGE

DELAY

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DELAY

RDT

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

LM5105

SNVS349D – FEBRUARY 2005 – REVISED MARCH 2016

LM5105 100V Half Bridge Gate Driver With Programmable Dead-Time

1

1 Features

1

•

Drives Both a High Side and Low Side N-Channel

MOSFET

•

1.8A Peak Gate Drive Current

•

Bootstrap Supply Voltage Range up to 118V DC

•

Integrated Bootstrap Diode

•

Single TTL Compatible Input

•

Programmable Turn-On Delays (Dead-Time)

•

Enable Input Pin

•

Fast Turn-Off Propagation Delays (26ns Typical)

•

Drives 1000pF with 15ns Rise and Fall Time

•

Supply Rail Under-Voltage Lockout

•

Low Power Consumption

•

Package: WSON-10 (4 mm x 4 mm)

2 Applications

•

Solid State motor drives

•

Half and Full Bridge power converters

3 Description

The LM5105 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. A high voltage diode is provided to

charge the high side gate drive bootstrap capacitor.

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 LM5105 is offered in the

thermally enhanced WSON plastic package.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LM5105

WSON (10)

4.00 mm × 4.00 mm

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Simplified Application Diagram