Datasheet > LM2576-12

LM2576-12

更新时间： 2024-11-25 04:59:39

品牌	Logo	应用领域
摩托罗拉 - MOTOROLA		稳压器
页数	文件大小	规格书
28页	288K
描述
Easy Switcher 3.0A Step-Down Voltage Regulator

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LM2576-12 数据手册

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EASY SWITCHER

3.0 A STEP–DOWN

VOLTAGE REGULATOR

The LM2576 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 3.0 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 LM2576 are offered by several different

inductor manufacturers.

SEMICONDUCTOR

TECHNICAL DATA

Since the LM2576 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 many cases, the power

dissipated is so low that no heatsink is required or its size could be reduced

dramatically.

A standard series of inductors optimized for use with the LM2576 are

available from several different manufacturers. This feature greatly simplifies

the design of switch–mode power supplies.

The LM2576 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 80 µA (typical) standby current. The output switch

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

protection under fault conditions.

T SUFFIX

PLASTIC PACKAGE

CASE 314D

Pin 1. V

2. Output

3. Ground

4. Feedback

5. ON/OFF

TV SUFFIX

PLASTIC PACKAGE

CASE 314B

Features

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

Heatsink surface

connected to Pin 3.

• Adjustable Version Output Voltage Range, 1.23 to 37 V ±4% Maximum

Over Line and Load Conditions

• Guaranteed 3.0 A Output Current

• Wide Input Voltage Range

D2T SUFFIX

PLASTIC PACKAGE

CASE 936A

• 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

(D PAK)

Heatsink surface (shown as terminal 6 in case outline

drawing) is connected to Pin 3.

DEVICE TYPE/NOMINAL OUTPUT VOLTAGE

Applications

LM2576–3.3

LM2576–5

LM2576–12

LM2576–15

LM2576–ADJ

3.3 V

5.0 V

12 V

• Simple High–Efficiency Step–Down (Buck) Regulator

• Efficient Pre–Regulator for Linear Regulators

• On–Card Switching Regulators

• Positive to Negative Converter (Buck–Boost)

• Negative Step–Up Converters

15 V

1.23 V to 37 V

ORDERING INFORMATION

• Power Supply for Battery Chargers

Operating

Temperature Range

Device

Package

LM2576T–XX

Straight Lead

Vertical Mount

Surface Mount

LM2576TV–XX T = –40° to +125°C

LM2576D2T–XX

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

Adjustable Output.

Motorola, Inc. 1999

Rev 1, 07/1999

MOTOROLA ANALOG IC DEVICE DATA

12 3 4 5 6 7...28

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与LM2576-12相关器件

型号	品牌	获取价格	描述	数据表
LM2576-12BT	MICREL	获取价格	52kHz Simple 3A Buck Voltage Regulator
LM2576-12BT⒂	MICREL	获取价格	52kHz Simple 3A Buck Voltage Regulator
LM2576-12BT-LB02	MICROCHIP	获取价格	3.5A SWITCHING REGULATOR, 52kHz SWITCHING FREQ-MAX, PSFM5
LM2576-12BT-LB03	MICROCHIP	获取价格	3.5A SWITCHING REGULATOR, 52kHz SWITCHING FREQ-MAX, PSFM5
LM2576-12BU	MICREL	获取价格	52kHz Simple 3A Buck Voltage Regulator
LM2576-12BUT&R	MICROCHIP	获取价格	Switching Regulator, Voltage-mode, 7.5A, 63kHz Switching Freq-Max, PSSO5, TO-263, 5 PIN
LM2576-12MDC	NSC	获取价格	IC 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, UUC, DIE, Switching Regulator or
LM2576-12MWC	NSC	获取价格	IC 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, UUC, WAFER, Switching Regulator o
LM2576-12WT	MICREL	获取价格	52kHz Simple 3A Buck Regulator
LM2576-12WU	MICREL	获取价格	52kHz Simple 3A Buck Regulator

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