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LM5574-Q1

SNOSB22C – OCTOBER 2008 – REVISED OCTOBER 2014

1 Features

3 Description

The

LM5574-Q1

is

an

easy

to

use

SIMPLE

1

•

LM5574-Q1 is an Automotive Grade Product That

is AEC-Q100 Grade Qualified

engineers to design and optimize a robust power

•

−40°C to + 150°C Operating Junction

supply

using

a

minimum

set

of

components.

Temperature

Operating with an input voltage range of 6 - 75 V, the

LM5574-Q1 delivers 0.5 A of continuous output

•

Integrated 75 V, 750 m

Ω N-Channel MOSFET

current with an integrated 750 m

Ω N-Channel

•

Ultra-Wide Input Voltage Range From 6 V to 75 V

MOSFET. The regulator utilizes an Emulated Current

•

Adjustable Output Voltage as Low as 1.225 V

Mode

architecture

which

provides

inherent

line

•

1.65% Feedback Reference Accuracy

regulation, tight load transient response, and ease of

loop compensation without the usual limitation of low-

•

Operating Frequency Adjustable Between 50 kHz

duty cycles associated with current mode regulators.

and 500 kHz With Single Resistor

The operating frequency is adjustable from 50 kHz to

•

Master or Slave Frequency Synchronization

500 kHz to allow optimization of size and efficiency.

•

Adjustable Soft-Start

To reduce EMI, a frequency synchronization pin

allows multiple ICs from the LM(2)557x family to self-

•

Emulated Current Mode Control Architecture

synchronize or to synchronize to an external clock.

•

Wide Bandwidth Error Amplifier

The LM5574-Q1 ensures robustness with cycle-by-

•

Built-In Protection

cycle current limit, short-circuit protection, thermal

shut-down, and remote shut-down. The device is

•

Package:

available in a TSSOP-16 package. The LM5574-Q1 is

–

TSSOP-16

design tools.

2 Applications

•

Automotive

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Industrial

LM5574-Q1

TSSOP (16)

5.00 mm x 4.40 mm

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

the end of the datasheet.

Simplified Application Schematic

1

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.