LM2574-5 datasheet, PDF - EEWORLD Datasheet

Datasheet> All Categories > LM2574-5

Preview

LM2574-5: DescriptionEASY SWITCHERE⑩ 0.5 A STEP-DOWN VOLTAGE REGULATOR; File Size265KB，24 Pages; ManufacturerMotorola ( NXP ); Websitehttps://www.nxp.com

Download Datasheet Compare View All

LM2574-5 Overview

EASY SWITCHERE⑩ 0.5 A STEP-DOWN VOLTAGE REGULATOR

Preview

Download Datasheet

View All

Order this document by LM2574/D

Advance Information

LM2574

Easy Switcher

™

0.5 A

Step-Down Voltage Regulator

The LM2574 series of regulators are monolithic integrated circuits ideally

suited for easy and convenient design of a step–down switching regulator

(buck converter). All circuits of this series are capable of driving a 0.5 A load

with excellent line and load regulation. These devices are available in fixed

output voltages of 3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output version.

These regulators were designed to minimize the number of external

components to simplify the power supply design. Standard series of

inductors optimized for use with the LM2574 are offered by several different

inductor manufacturers.

Since the LM2574 converter is a switch–mode power supply, its efficiency

is significantly higher in comparison with popular three–terminal linear

regulators, especially with higher input voltages. In most cases, the power

dissipated by the LM2574 regulator is so low, that the copper traces on the

printed circuit board are normally the only heatsink needed and no additional

heatsinking is required.

The LM2574 features include a guaranteed

±4%

tolerance on output

voltage within specified input voltages and output load conditions, and

±10%

on the oscillator frequency (±2% over 0°C to +125°C). External shutdown is

included, featuring 60

µA

(typical) standby current. The output switch

includes cycle–by–cycle current limiting, as well as thermal shutdown for full

protection under fault conditions.

Features

EASY SWITCHER™

0.5 A STEP–DOWN

VOLTAGE REGULATOR

SEMICONDUCTOR

TECHNICAL DATA

N SUFFIX

PLASTIC PACKAGE

CASE 626

•

3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions

Adjustable Version Output Voltage Range, 1.23 to 37 V

±4%

max over

Line and Load Conditions

Guaranteed 0.5 A Output Current

Wide Input Voltage Range: 4.75 to 40 V

Requires Only 4 External Components

52 kHz Fixed Frequency Internal Oscillator

TTL Shutdown Capability, Low Power Standby Mode

High Efficiency

Uses Readily Available Standard Inductors

Thermal Shutdown and Current Limit Protection

PIN CONNECTIONS

Sig Gnd

ON/OFF

Pwr Gnd

Output

Vin

(Top View)

* No internal connection, but should be soldered to

PC board for best heat transfer.

Applications

Simple and High–Efficiency Step–Down (Buck) Regulators

Efficient Pre–regulator for Linear Regulators

On–Card Switching Regulators

Positive to Negative Converters (Buck–Boost)

Negative Step–Up Converters

Power Supply for Battery Chargers

DEVICE TYPE/NOMINAL OUTPUT VOLTAGE

LM2574–3.3

LM2574–5

LM2574–12

LM2574–15

LM2574–ADJ

3.3 V

5.0 V

12 V

15 V

1.23 V to 37 V

ORDERING INFORMATION

Device

Operating

Temperature Range

Package

DIP–8

LM2574N–XX TA = –40° to +125°C

XX = Voltage Option, i.e, 3.3, 5, 12, 15 V; and ADJ for

Adjustable Output.

This document contains information on a new product. Specifications and information herein

are subject to change without notice.

Motorola, Inc. 1997

Rev 0

LM2574-5 Related Products

	LM2574-5	LM2574-ADJ	LM2574-3.3	LM2574-15	LM2574-12
Description	EASY SWITCHERE⑩ 0.5 A STEP-DOWN VOLTAGE REGULATOR	EASY SWITCHERE⑩ 0.5 A STEP-DOWN VOLTAGE REGULATOR	EASY SWITCHERE⑩ 0.5 A STEP-DOWN VOLTAGE REGULATOR	EASY SWITCHERE⑩ 0.5 A STEP-DOWN VOLTAGE REGULATOR	EASY SWITCHERE⑩ 0.5 A STEP-DOWN VOLTAGE REGULATOR

Recommended Resources

STK441-105 STK441 power amplifier circuit diagram

Gallstone hybrid amplifier new production

VMOS, IGBT inverter charging circuit diagram

Automatic water inlet control circuit

555 electric fan intermittent power supply socket circuit

Internal structure and working principle diagram of M57957L/M57958L

How to use XBYTE to read and write DS12B887: The 51 MCU and DS12B8 are connected in bus mode, where the CS chip select segment is connected to Y0 of the decoder 74HC154, and the address lines A\B\C\D of 74HC154 are connected to P2_3, P2_4, P2_5,...; 38824520 Embedded System

Explanation of op amp parameters and selection of commonly used op amps: [i=s]This post was last edited by qwqwqw2088 on 2015-9-11 09:20[/i] [align=left]Integrated op amps have many parameters, the main parameters are divided into DC indicators and AC indicators, and all c...; qwqwqw2088 Analogue and Mixed Signal

[Contribute to C2000] The principle of CCS and DSP_BIOS - routines: I think this information is good. Students who find it useful can collect it and don't forget to leave a footprint. I have a lot of information here, all of which I would like to share. Let's make pro...; fxw451 Microcontroller MCU

TI LM3s3748, this is its USB data: ...; bootloader MCU

[Zephyr] Getting Started: Building a Zephyr Development Environment and Hello-World: [i=s]This post was last edited by tidyjiang8 on 2017-1-19 11:01[/i] [align=center][size=6][b]Zephyr Getting Started: Building a Development Environment and Hello-World[/b][/size][/align] Zephyr OS's d...; tidyjiang8 Real-time operating system RTOS

New key scanning program: [i=s] This post was last edited by yaoyuanytu on 2016-3-13 22:34 Edit [/i] Core algorithm: unsigned char Trg; unsigned char Cont; void KeyRead( void ) { unsigned char ReadData = PINB^0xff; // 1 XOR di...; yaoyuanytu 51mcu

Shortcut: A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF AG AH AI AJ AK AL AM AN AO AP AQ AR AS AT AU AV AW AX AY AZ B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF BG BH BI BJ BK BL BM BN BO BP BQ BR BS BT BU BV BW BX BY BZ C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF CG CH CI CJ CK CL CM CN CO CP CQ CR CS CT CU CV CW CX CY CZ D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF DG DH DI DJ DK DL DM DN DO DP DQ DR DS DT DU DV DW DX DZ

Popular Components