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LM22678TJ-ADJ 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
电源管理
封装:
TO-263
描述:
LM22678 / LM22678Q 42V ， 5A SIMPLE SWITCHER降压稳压器与特点 LM22678/LM22678Q 42V, 5A SIMPLE SWITCHER Step-Down Voltage Regulator with Features
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P2Hot
原理图在P1P7
封装尺寸在P18P20P21
标记信息在P18P19
封装信息在P18P19P20P21
技术参数、封装参数在P3
应用领域在P1P23
电气规格在P3P4P5P6P8P9P12P15
导航目录
LM22678TJ-ADJ数据手册
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LM22678-ADJ
VIN
EN
SW
BOOT
FB
GND
VIN
VOUT
LM22678
www.ti.com
SNVS585K –SEPTEMBER 2008–REVISED MARCH 2013
LM22678/LM22678Q 42V, 5A SIMPLE SWITCHER
®
Step-Down Voltage Regulator with
Features
Check for Samples: LM22678
1
FEATURES
DESCRIPTION
The LM22678 switching regulator provides all of the
23
• Wide Input Voltage Range: 4.5V to 42V
functions necessary to implement an efficient high
• Internally Compensated Voltage Mode Control
voltage step-down (buck) regulator using a minimum
• Stable with Low ESR Ceramic Capacitors
of external components. This easy to use regulator
incorporates a 42V N-channel MOSFET switch
• 100 mΩ N-Channel MOSFET
capable of providing up to 5A of load current.
• Output Voltage Options:
Excellent line and load regulation along with high
– -ADJ (Outputs as Low as 1.285V)
efficiency (>90%) are featured. Voltage mode control
offers short minimum on-time, allowing the widest
– -5.0 (Output Fixed to 5V)
ratio between input and output voltages. Internal loop
• ±1.5% Feedback Reference Accuracy
compensation means that the user is free from the
• Switching Frequency of 500 kHz
tedious task of calculating the loop compensation
components. Fixed 5V output and adjustable output
• -40°C to 125°C Operating Junction
voltage options are available. A switching frequency
Temperature Range
of 500 kHz allows for small external components and
• Precision Enable Pin
good transient response. A precision enable input
• Integrated Boot-Strap Diode
allows simplification of regulator control and system
power sequencing. In shutdown mode the regulator
• Integrated Soft-Start
draws only 25 µA (typ.). Built in soft-start (500µs, typ)
• Fully WEBENCH
®
enabled
saves external components. The LM22678 also has
• LM22678Q is an Automotive Grade Product
built in thermal shutdown, and current limiting to
that is AEC-Q100 Grade 1 Qualified (-40°C to
protect against accidental overloads.
+125°C Operating Junction Temperature)
The LM22678 is a member of Texas Instruments'
• PFM (Exposed Pad) Package
SIMPLE SWITCHER
®
family. The SIMPLE
SWITCHER concept provides for an easy to use
APPLICATIONS
complete design using a minimum number of external
components and the TI WEBENCH design tool. TI's
• Industrial Control
WEBENCH tool includes features such as external
• Telecom and Datacom Systems
component calculation, electrical simulation, thermal
• Embedded Systems
simulation, and Build-It boards for easy design-in.
• Conversions from Standard 24V, 12V and 5V
Input Rails
Simplified Application Schematic
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2SIMPLE SWITCHER, WEBENCH are registered trademarks of Texas Instruments.
3All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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