Datasheet > LM22677

LM22677

更新时间： 2024-11-22 02:58:23

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
28页	1240K
描述
LM22677/-Q1 42-V, 5-A SIMPLE SWITCHERÂ®, Step-Down Voltage Regulator With Features

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LM22677, LM22677-Q1

SNVS582O –SEPTEMBER 2008–REVISED AUGUST 2015

LM22677/-Q1 42-V, 5-A SIMPLE SWITCHER , Step-Down Voltage Regulator

With Features

1 Features

3 Description

The LM22677 switching regulator provides all of the

functions necessary to implement an efficient high-

voltage step-down (buck) regulator using a minimum

of external components. This easy-to-use regulator

incorporates a 42-V N-channel MOSFET switch that

can provide up to 5 A of load current. Excellent line

and load regulation along with high efficiency (> 90%)

are featured. Voltage mode control offers short

minimum on-time, allowing the widest ratio between

input and output voltages. Internal loop compensation

means that the user is free from the tedious task of

calculating the loop compensation components. Fixed

5-V output and adjustable output voltage options are

available. The default switching frequency is set at

500 kHz, thus allowing for small external components

and good transient response. In addition, the

frequency can be adjusted over a range of 200 kHz

to 1 MHz with a single external resistor. The internal

oscillator can be synchronized to a system clock or to

the oscillator of another regulator. A precision enable

input allows simplification of regulator control and

system power sequencing. In shutdown mode the

regulator draws only 25 µA (typical). The LM22677

also has built-in thermal shutdown, and current

limiting to protect against accidental overloads.

•

Wide Input Voltage Range: 4.5 V to 42 V

Internally Compensated Voltage Mode Control

Stable With Low ESR Ceramic Capacitors

100-mΩ N-Channel MOSFET

•

Output Voltage Options:

–

-ADJ (Outputs as Low as 1.285 V)

-5.0 (Output Fixed to 5 V)

•

±1.5% Feedback Reference Accuracy

500-kHz Default Switching Frequency

Adjustable Switching Frequency and

Synchronization

•

–40°C to +125°C Operating Junction Temperature

Range

•

Precision Enable Input

Integrated Boot-Strap Diode

Integrated Soft-Start

Fully WEBENCH^®Enabled

LM22677-Q1 is an Automotive-Grade Product

that is AEC-Q100 Grade 1 Qualified (–40°C to

+125°C Operating Junction Temperature)

•

NDR (Exposed Pad)

The LM22677 device is

a member of Texas

Instruments' SIMPLE SWITCHER^®family. The

SIMPLE SWITCHER concept provides for an easy-to-

use complete design using a minimum number of

external components and the TI WEBENCH design

tool. TI's WEBENCH tool includes features such as

external component calculation, electrical simulation,

thermal simulation, and Build-It boards for easy

design-in.

2 Applications

•

Industrial Control

Telecom and Datacom Systems

Embedded Systems

Conversions from Standard 24-V, 12-V and 5-V

Input Rails

Device Information⁽¹⁾

Simplified Application Schematic

PART NUMBER

LM22677

PACKAGE

BODY SIZE (NOM)

VIN

LM22677-ADJ BOOT

TO-263 (7)

10.16 mm x 9.85 mm

LM22677-Q1

VOUT

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

RT/SYNC EN GND

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...28

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LM22677 替代型号

型号	品牌	替代类型	描述	数据表
LM3150	TI	功能相似	具有可调输出电压的 6V 至 42V 同步降压控制器
LM22675	TI	功能相似	LM22675/LM22675Q 42V, 1A SIMPLE SWITCHER Step-Down Voltage Regulator with
LM22678	TI	功能相似	LM22678/LM22678Q 42V, 5A SIMPLE SWITCHER Step-Down Voltage Regulator with Features

与LM22677相关器件

型号	品牌	获取价格	描述	数据表
LM22677_15	TI	获取价格	LM22677/-Q1 42-V, 5-A SIMPLE SWITCHERÂ®, Step
LM22677Q	NSC	获取价格	5A SIMPLE SWITCHER?, Step-Down Voltage Regulator with Synchronization or Adjustable Switch
LM22677-Q1	TI	获取价格	LM22677/-Q1 42-V, 5-A SIMPLE SWITCHERÂ®, Step
LM22677QTJ-5.0	NSC	获取价格	5A SIMPLE SWITCHER?, Step-Down Voltage Regulator with Synchronization or Adjustable Switch
LM22677QTJ-ADJ	NSC	获取价格	5A SIMPLE SWITCHER?, Step-Down Voltage Regulator with Synchronization or Adjustable Switch
LM22677QTJ-ADJ/NOPB	TI	获取价格	LM22677/-Q1 42-V, 5-A SIMPLE SWITCHERÂ®, Step
LM22677QTJE-5.0	NSC	获取价格	5A SIMPLE SWITCHER?, Step-Down Voltage Regulator with Synchronization or Adjustable Switch
LM22677QTJE-5.0/NOPB	TI	获取价格	LM22677/-Q1 42-V, 5-A SIMPLE SWITCHERÂ®, Step
LM22677QTJE-ADJ	NSC	获取价格	5A SIMPLE SWITCHER?, Step-Down Voltage Regulator with Synchronization or Adjustable Switch
LM22677QTJE-ADJ/NOPB	TI	获取价格	LM22677/-Q1 42-V, 5-A SIMPLE SWITCHERÂ®, Step

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