LM5574MT/NOPB National Semiconductor, LM5574MT/NOPB Datasheet

LM5574MT/NOPB

Manufacturer Part Number

LM5574MT/NOPB

Description

IC BUCK SYNC ADJ .5A 16TSSOP

Manufacturer

National Semiconductor

Series

PowerWise®, SIMPLE SWITCHER®r

Type

Step-Down (Buck)r

Datasheets

1.LM5574MTNOPB.pdf (22 pages)

2.LM5574MTNOPB.pdf (5 pages)

Specifications of LM5574MT/NOPB

Internal Switch(s)

Yes

Synchronous Rectifier

Number Of Outputs

Voltage - Output

1.23 ~ 70 V

Current - Output

500mA

Frequency - Switching

200kHz, 485kHz

Voltage - Input

6 ~ 75 V

Operating Temperature

-40°C ~ 125°C

Mounting Type

Surface Mount

Package / Case

16-TSSOP

Power - Output

700mW

Current, Input Bias

3.7 mA

Current, Input Offset

50 μA

Current, Output

0.5 A

Frequency, Oscillator

200/485 kHz

Package Type

TSSOP

Regulator Type

Buck (Step-Down), Switching

Resistance, Thermal, Junction To Case

30 °C/W

Temperature, Operating, Range

-40 to +125 °C

Voltage, Input

6 to 75 V

Voltage, Offset

0.7 V (COMP to PWM Comparator)

Voltage, Output

7.15 V

Dc To Dc Converter Type

Step Down

Pin Count

Input Voltage

75V

Output Voltage

1.225 to 70V

Switching Freq

50 TO 500KHz

Output Current

500mA

Efficiency

85%

Output Type

Adjustable

Switching Regulator

Yes

Mounting

Surface Mount

Input Voltage (min)

Operating Temp Range

-40C to 125C

Operating Temperature Classification

Automotive

For Use With

LM5574BLDT - WEBENCH BUILD IT BOARD LM5574LM5574EVAL - BOARD EVALUATION FOR LM5574

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

*LM5574MT
*LM5574MT/NOPB
LM5574MT

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM5574MT/NOPB

Manufacturer:

Quantity:

8 500

Company:

Meier Automation Equipment Co., Limited

Part Number:

LM5574MT/NOPB

Manufacturer:

TI/德州仪器

Quantity:

20 000

Current page: 1 of 5
Download datasheet (229Kb)

LM5574

SIMPLE SWITCHER® 75V, 0.5A Step-Down Switching

Regulator

General Description

The LM5574 is an easy to use SIMPLE SWITCHER® buck

regulator which allows design engineers to design and opti-

mize a robust power supply using a minimum set of compo-

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

LM5574 delivers 0.5A of continuous output current with an

integrated 750mΩ N-Channel MOSFET. The regulator uti-

lizes an Emulated Current Mode architecture which provides

inherent line regulation, tight load transient response, and

ease of loop compensation without the usual limitation of low-

duty cycles associated with current mode regulators. The

operating frequency is adjustable from 50kHz to 500kHz to

allow optimization of size and efficiency. To reduce EMI, a

frequency synchronization pin allows multiple IC’s from the

LM(2)557x family to self-synchronize or to synchronize to an

external clock. The LM5574 guarantees robustness with cy-

cle-by-cycle current limit, short-circuit protection, thermal

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

a TSSOP-16 package. The LM5574 is supported by the full

suite of WEBENCH

Simplified Application Schematic

WEBENCH

is a registered trademark of National Semiconductor Corporation.

On-Line design tools.

Features

■

Package

■

Integrated 75V, 750mΩ N-channel MOSFET

Ultra-wide input voltage range from 6V to 75V

Adjustable output voltage as low as 1.225V

1.5% feedback reference accuracy

Operating frequency adjustable between 50kHz and

500kHz with single resistor

Master or slave frequency synchronization

Adjustable soft-start

Emulated current mode control architecture

Wide bandwidth error amplifier

Built-in protection

TSSOP-16

20212001

Related parts for LM5574MT/NOPB

LM5574MT/NOPB Summary of contents

Page 1

... TSSOP-16 package. The LM5574 is supported by the full suite of WEBENCH ® On-Line design tools. Simplified Application Schematic WEBENCH ® registered trademark of National Semiconductor Corporation. Features ■ Integrated 75V, 750mΩ N-channel MOSFET ■ Ultra-wide input voltage range from 6V to 75V ■ Adjustable output voltage as low as 1.225V ■ ...

Page 2

Connection Diagram Ordering Information Order Number Package Type LM5574MT TSSOP-16 LM5574MTX TSSOP-16 20212002 Top View 16-Lead TSSOP NSC Package Drawing MTC16 MTC16 2 Supplied As 92 Units in Rail 2500 Units on Tape and Reel ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications GND IN BST to GND PRE to GND SW to GND (Steady State) BST SD GND CC Electrical Characteristics apply over full Operating Junction Temperature range. V Symbol ...

Page 4

Symbol Parameter RAMP GENERATOR Ramp Current 1 Ramp Current 2 PWM COMPARATOR Forced Off-time Min On-time COMP to PWM Comparator Offset ERROR AMPLIFIER Feedback Voltage FB Bias Current DC Gain COMP Sink / Source Current Unity Gain Bandwidth DIODE SENSE ...

Page 5

Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead TSSOP Package NS Package Number MTC16 20 ...

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