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LM2677S-3.3SLASHNOPB.B中文资料德州仪器数据手册PDF规格书

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厂商型号

LM2677S-3.3SLASHNOPB.B

功能描述

LM2677 SIMPLE SWITCHER® High Efficiency 5-A Step-Down Voltage Regulator with Sync

文件大小

1.04321 Mbytes

页面数量

31

生产厂商

TI

中文名称

德州仪器

网址

网址

数据手册

下载地址一下载地址二到原厂下载

更新时间

2025-10-4 15:50:00

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LM2677S-3.3SLASHNOPB.B规格书详情

1 Features

1• Efficiency up to 92%

• Simple and Easy to Design Using Off-the-Shelf

External Components

• 100-mΩ DMOS Output Switch

• 3.3-V, 5-V, and 12-V Fixed Output and Adjustable

(1.2 V to 37 V) Versions

• 50-μA Standby Current When Switched OFF

• ±2% Maximum Output Tolerance Over Full Line

and Load Conditions

• Wide Input Voltage Range: 8 V to 40 V

• External Sync Clock Capability (280 kHz to

400 kHz)

• 260-kHz Fixed Frequency Internal Oscillator

• −40°C to 125°C Operating Junction Temperature

Range

2 Applications

• Simple to Design, High Efficiency (> 90%) Step-

Down Switching Regulators

• Efficient System Preregulator for Linear Voltage

Regulators

• Battery Chargers

• Communications and Radio Equipment Regulator

With Synchronized Clock Frequency

3 Description

The LM2677 series of regulators are monolithic

integrated circuits which provide all of the active

functions for a step-down (buck) switching regulator

capable of driving up to 5-A loads with excellent line

and load regulation characteristics. High efficiency

(>90%) is obtained through the use of a low onresistance

DMOS power switch. The series consists

of fixed output voltages of 3.3-V, 5-V, and 12-V and

an adjustable output version.

The SIMPLE SWITCHER® concept provides for a

complete design using a minimum number of external

components. The switching clock frequency can be

provided by an internal fixed frequency oscillator

(260 kHz) or from an externally provided clock in the

range of 280 kHz to 400 kHz, which allows the use of

physically smaller-sized components. A family of

standard inductors for use with the LM2677 are

available from several manufacturers to greatly

simplify the design process. The external Sync clock

provides direct and precise control of the output ripple

frequency for consistent filtering or frequency

spectrum positioning.

The LM2677 series also has built-in thermal

shutdown, current-limiting, and an ON/OFF control

input that can power down the regulator to a low

50-μA quiescent-current standby condition. The

output voltage is ensured to a ±2% tolerance.

供应商 型号 品牌 批号 封装 库存 备注 价格
TI
23+
NA
20000
询价
TexasInstruments
18+
ICREGBUCK5V5ATO263-7
6580
公司原装现货/欢迎来电咨询!
询价
NS
22+
SOIC
3000
原装正品,支持实单
询价
TI
23+
TO-263-7
3200
公司只做原装,可来电咨询
询价
TI
23+
DDPAK/TO2637
9000
原装正品,支持实单
询价
NS/国半
2447
TO-263
100500
一级代理专营品牌!原装正品,优势现货,长期排单到货
询价
TI
22+
TO-263-8
9000
原厂渠道,现货配单
询价
TI
24+
DDPAK/TO-263-7
66800
原厂授权一级代理,专注汽车、医疗、工业、新能源!
询价
NSC
23+
TO-263-7
7566
原厂原装
询价
TI/德州仪器
22+
TO-263-7
20000
原装现货,实单支持
询价