lm5022mme National Semiconductor Corporation, lm5022mme Datasheet

lm5022mme

Manufacturer Part Number

lm5022mme

Description

60v Low Side Controller For Boost And Sepic

Manufacturer

National Semiconductor Corporation

Datasheet

1.LM5022MME.pdf (22 pages)

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LM5022

60V Low Side Controller for Boost and SEPIC

General Description

The LM5022 is a high voltage low-side N-channel MOSFET

controller ideal for use in boost and SEPIC regulators. It con-

tains all of the features needed to implement single ended

primary topologies. Output voltage regulation is based on

current-mode control, which eases the design of loop com-

pensation while providing inherent input voltage feed-forward.

The LM5022 includes a start-up regulator that operates over

a wide input range of 6V to 60V. The PWM controller is de-

signed for high speed capability including an oscillator fre-

quency range up to 2 MHz and total propagation delays less

than 100 ns. Additional features include an error amplifier,

precision reference, line under-voltage lockout, cycle-by-cy-

cle current limit, slope compensation, soft-start, external syn-

chronization capability and thermal shutdown. The LM5022 is

available in the MSOP-10 package.

Typical Application

202122

Features

■

Applications

■

Internal 60V Startup Regulator

1A Peak MOSFET Gate Driver

Duty Cycle Limit of 90%

Programmable UVLO with Hysteresis

Cycle-by-Cycle Current Limit

External Synchronizable (AC-coupled)

Single Resistor Oscillator Frequency Set

Slope Compensation

Adjustable Soft-start

MSOP-10 Package

Boost Converter

SEPIC Converter

Range 6V to 60V

20212201

www.national.com

August 2007

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