Datasheet > LM22672

LM22672

更新时间： 2024-09-17 02:58:27

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
30页	1331K
描述
SIMPLE SWITCHERÂ® Step-Down Voltage Regulator with Features

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LM22672, LM22672-Q1

SNVS588M –SEPTEMBER 2008–REVISED NOVEMBER 2014

LM22672/-Q1 42-V, 1-A SIMPLE SWITCHER Step-Down Voltage Regulator

with Features

1 Features

3 Description

The LM22672 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

capable of providing up to 1 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.

•

Wide Input Voltage Range: 4.5 V to 42 V

Internally Compensated Voltage Mode Control

Stable with Low ESR Ceramic Capacitors

200 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 Junction Temperature Range

Precision Enable Input

The default switching frequency is set at 500 kHz

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 (typ). An adjustable soft-start feature is

provided through the selection of a single external

capacitor. The LM22672 also has built in thermal

shutdown, and current limiting to protect against

accidental overloads.

Integrated Boot-Strap Diode

Adjustable Soft-Start

Fully WEBENCH^®Enabled

LM22672-Q1 is an Automotive Grade Product

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

+125°C Junction Temperature)

•

SO PowerPAD (Exposed Pad)

2 Applications

•

Industrial Control

Telecom and Datacom Systems

Embedded Systems

The LM22672 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.

Conversions from Standard 24 V, 12 V and 5 V

Input Rails

Simplified Application Schematic

VIN

BOOT

VIN

Device Information⁽¹⁾

LM22672-ADJ

VOUT

PART NUMBER

PACKAGE

BODY SIZE (NOM)

RT/SYNC SS EN GND

LM22672,

LM22672-Q1

HSOP (8)

4.89 mm x 3.90 mm

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

the end of the data sheet.

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...30

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LM22672 替代型号

型号	品牌	替代类型	描述	数据表
LM22676	TI	功能相似	LM22676/-Q1 42 V, 3 A SIMPLE SWITCHERÂ® Step-
LM22671	TI	功能相似	LM22671/LM22671-Q1 42V, 500mA SIMPLE SWITCHER
LM22675	TI	功能相似	LM22675/LM22675Q 42V, 1A SIMPLE SWITCHER Step-Down Voltage Regulator with

与LM22672相关器件

型号	品牌	获取价格	描述	数据表
LM22672_15	TI	获取价格	SIMPLE SWITCHERÂ® Step-Down Voltage Regulator
LM22672MR-5.0	NSC	获取价格	1A SIMPLE SWITCHER®, Step-Down Voltage Regula
LM22672MR-5.0/NOPB	TI	获取价格	SIMPLE SWITCHERÂ® Step-Down Voltage Regulator
LM22672MR-ADJ	NSC	获取价格	1A SIMPLE SWITCHER®, Step-Down Voltage Regula
LM22672MR-ADJ/NOPB	TI	获取价格	SIMPLE SWITCHERÂ® Step-Down Voltage Regulator
LM22672MRE-5.0	NSC	获取价格	1A SIMPLE SWITCHER®, Step-Down Voltage Regula
LM22672MRE-5.0/NOPB	TI	获取价格	SIMPLE SWITCHERÂ® Step-Down Voltage Regulator
LM22672MRE-ADJ	NSC	获取价格	1A SIMPLE SWITCHER®, Step-Down Voltage Regula
LM22672MRE-ADJ/NOPB	TI	获取价格	SIMPLE SWITCHERÂ® Step-Down Voltage Regulator
LM22672MRX-5.0	NSC	获取价格	1A SIMPLE SWITCHER®, Step-Down Voltage Regula

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