LM5033

100V Push-Pull Voltage Mode PWM Controller

General Description

The LM5033 High Voltage PWM controller contains all the

features needed to implement Push-Pull, Half-Bridge, and

Full-Bridge topologies. Applications include closed loop volt-

age mode converters with a highly regulated output voltage,

or an open loop "DC transformer" such as an Intermediate

ing gate driver outputs with a guaranteed deadtime are

provided. The LM5033 includes a start-up regulator that

operates over a wide input range of 15V to 100V. Additional

features include: precision voltage reference output, current

limit detection, remote shutdown, softstart, sync capability

and thermal shutdown. This high speed IC has total propa-

gation delays less than 100 ns and a 1MHz capable oscilla-

tor.

Features

n

Internal high voltage (100V) start-up regulator

n

Single resistor oscillator setting

n

Synchronizable

n

Precision reference output

n

Adjustable soft-start

n

Over-current protection

n

Direct optocoupler interface

n

1.5A peak gate drivers

n

Thermal Shutdown

Applications

n

Intermediate DC/DC Bus Converter

n

Telecommunication Power Converters

n

Industrial Power Converters

n

+42V Automotive Systems

Package

n

MSOP-10

n

LLP-10

Connection Diagram

20035401

10-Lead MSOP, LLP

Ordering Information

Order Number

Package Type

NSC Package Drawing

Supplied As

LM5033MM

MSOP-10

MUB10A

1000 Units on Tape and Reel

LM5033MMX

MSOP-10

MUB10A

3500 Units on Tape and Reel

LM5033SD

LLP-10 (4 x 4 mm)

SDC10A

1000 Units on Tape and Reel

LM5033SDX

LLP-10 (4 x 4 mm)

SDC10A

4500 Units on Tape and Reel

February 2005

© 2005 National Semiconductor Corporation

DS200354

www.national.com