LM2574HVMX-5.0 datasheet(3/38 Pages) TI1

部件名	LM2574HVMX-5.0

功能描述	SIMPLE SWITCHER 0.5A Step-Down Voltage Regulator

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制造商	TI1 [Texas Instruments]

网页	http://www.ti.com

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3 / 38 page

1

NC

14

NC

2

NC

13

NC

3

FB

12

OUTPUT

4

SIG_GND

11

NC

5

ON/OFF

10

V

IN

6

PWR_GND

9

NC

7

NC

8

NC

1

FB

8

NC

2

SIG_GND

7

OUTPUT

3

ON/OFF

6

NC

4

PWR_GND

5

V

IN

3

LM2574, LM2574HV

www.ti.com

SNVS104D – JUNE 1999 – REVISED APRIL 2016

Product Folder Links: LM2574 LM2574HV

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5 Pin Configuration and Functions

P Package

8-Pin PDIP

Top View

NPA Package

14-Pin SOIC

Top View

Pin Functions

I/O

DESCRIPTION

NAME

PDIP

SOIC

FB

1

3

I

Feedback sense input pin. Connect to the midpoint of feedback divider to set

VOUT for ADJ version or connect this pin directly to the output capacitor for a

fixed output version.

NC

8, 6

1, 2, 7, 8, 9,

11, 13, 14

—

No internal connection, but must be soldered to PCB for best heat transfer.

ON/OFF

3

5

I

Enable input to the voltage regulator. High = OFF and low = ON. Connect to

GND to enable the voltage regulator. Do not leave this pin float.

OUTPUT

7

12

O

Emitter pin of the power transistor. This is a switching node. Attached this pin

to an inductor and the cathode of the external diode.

PWR_GND

4

6

—

Power ground pins. Connect to system ground and SIF GND, ground pins of

CIN and COUT. Path to CIN must be as short as possible.

SIG_GND

2

4

—

Signal ground pin. Ground reference for internal references and logic. Connect

to system ground.

VIN

5

10

I

Supply input pin to collector pin of high-side transistor. Connect to power

supply and input bypass capacitors CIN. Path from VIN pin to high frequency

bypass CIN and PWR GND must be as short as possible.

类似零件编号 - LM2574HVMX-5.0

制造商	部件名	数据表	功能描述
Texas Instruments	LM2574HVMX-5.0	2Mb / 35P	[Old version datasheet] LM2574/LM2574HV SIMPLE SWITCHER??0.5A Step-Down Voltage Regulator
Texas Instruments	LM2574HVMX-5.0/NOPB	2Mb / 35P	[Old version datasheet] LM2574/LM2574HV SIMPLE SWITCHER??0.5A Step-Down Voltage Regulator

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