5秒后页面跳转
捷配首页

Datasheet > LM2748
LM2748 PDF预览

LM2748

更新时间： 2024-11-25 12:48:31
品牌 Logo 应用领域
德州仪器 - TI 控制器时钟
页数 文件大小 规格书
37页 1275K
描述
LM2745 / LM2748 Synchronous Buck Controller with Pre-Bias Startup, and Optional Clock

阅读下载

中文翻译

获取价格

LM2748 数据手册

 浏览型号LM2748的Datasheet PDF文件第2页浏览型号LM2748的Datasheet PDF文件第3页浏览型号LM2748的Datasheet PDF文件第4页浏览型号LM2748的Datasheet PDF文件第5页浏览型号LM2748的Datasheet PDF文件第6页浏览型号LM2748的Datasheet PDF文件第7页 
LM2745, LM2748  
www.ti.com  
SNOSAL2E –APRIL 2005–REVISED APRIL 2013  
LM2745 / LM2748 Synchronous Buck Controller with Pre-Bias Startup, and Optional Clock  
Synchronization  
Check for Samples: LM2745, LM2748  
1
FEATURES  
DESCRIPTION  
The LM2745/8 are high-speed synchronous buck  
regulator controllers with an accurate feedback  
voltage accuracy of ±1.5%. It can provide simple  
down conversion to output voltages as low as 0.6V.  
Though the control sections of the IC are rated for 3  
to 6V, the driver sections are designed to accept  
input supply rails as high as 14V. The use of adaptive  
non-overlapping MOSFET gate drivers helps avoid  
potential shoot-through problems while maintaining  
high efficiency. The IC is designed for the more cost-  
effective option of driving only N-channel MOSFETs  
in both the high-side and low-side positions. It senses  
the low-side switch voltage drop for providing a  
simple, adjustable current limit.  
2
•
Switching Frequency from 50 kHz to 1 MHz  
•
Switching Frequency Synchronize Range 250  
kHz to 1 MHz (LM2745 Only)  
•
•
•
•
•
•
Startup with a Pre-biased Output Load  
Power Stage Input Voltage from 1V to 14V  
Control Stage Input Voltage from 3V to 6V  
Output Voltage Adjustable Down to 0.6V  
Power Good Flag and Shutdown  
Output Overvoltage and Undervoltage  
Detection  
•
±1.5% Feedback Voltage Accuracy Over  
Temperature  
The LM2745/8 features a fixed-frequency voltage-  
mode PWM control architecture which is adjustable  
from 50 kHz to 1 MHz with one external resistor. In  
addition, the LM2745 also allows the switching  
frequency to be synchronized to an external clock  
signal over the range of 250 kHz to 1 MHz. This wide  
range of switching frequency gives the power supply  
designer the flexibility to make better tradeoffs  
between component size, cost and efficiency.  
•
•
•
Low-side Adjustable Current Sensing  
Adjustable Soft-start  
Tracking and Sequencing with Shutdown and  
Soft Start Pins  
•
TSSOP-14 Package  
APPLICATIONS  
•
•
•
•
•
Down Conversion from 3.3V  
Cable Modem, DSL and ADSL  
Laser Jet and Ink Jet Printers  
Low Voltage Power Modules  
DSP, ASIC, Core and I/O  
Features include the ability to startup with a pre-  
biased load on the output, soft-start, input  
undervoltage lockout (UVLO) and Power Good  
(based on both undervoltage and overvoltage  
detection). In addition, the shutdown pin of the IC can  
be used for providing startup delay, and the soft-start  
pin can be used for implementing precise tracking, for  
the purpose of sequencing with respect to an external  
rail.  
Typical Application  
V
= 3.3V  
V
= 3.3V  
IN  
CC  
D
1
C
BOOT  
R
PULL-UP  
+
C
1,2  
R
C
IN  
CC  
Q1  
Q2  
V
HG  
CC  
LM2745  
SD  
BOOT  
R
CS  
L1  
CC  
V
= 1.2V@16A  
OUT  
I
PWGD  
SEN  
Clk  
FREQ/SYNC  
SS/TRACK  
SGND  
LG  
PGND  
PGND  
FB  
C
+
Clk  
R
FB2  
C
O
1,2  
R
FADJ  
C
SS  
EAO  
R
C
C3  
C2  
R
FB1  
C
C1  
C
C2  
R
C1  
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.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2005–2013, Texas Instruments Incorporated  
 
1234567...37

中文翻译

下载PDF

LM2748 替代型号

型号 品牌 替代类型 描述 数据表
LM3743 TI

功能相似

 High-Performance Synchronous Buck Controller with Comprehensive Fault Protection Features
LM2747 TI

功能相似

 Synchronous Buck Controller with Pre-Bias Startup, and Optional Clock Synchronization
LM2743 TI

功能相似

 LM2743 Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller

与LM2748相关器件

型号 品牌 获取价格 描述 数据表
LM2748MTC NSC

获取价格

 		Synchronous Buck Controller with Pre-bias Startup, and Optional Clock Synchronization
LM2748MTC TI

获取价格

 		LM2745 / LM2748 Synchronous Buck Controller with Pre-Bias Startup
LM2748MTC/NOPB TI

获取价格

 		LM2745 / LM2748 Synchronous Buck Controller with Pre-Bias Startup
LM2748MTCX TI

获取价格

 		LM2745 / LM2748 Synchronous Buck Controller with Pre-Bias Startup, and Optional Clock
LM2748MTCX NSC

获取价格

 		Synchronous Buck Controller with Pre-bias Startup, and Optional Clock Synchronization
LM2748MTCX/NOPB TI

获取价格

 		LM2745 / LM2748 Synchronous Buck Controller with Pre-Bias Startup
LM2750 NSC

获取价格

 		Low Noise, 5.0V Regulated Switched Capacitor Voltage Converter
LM2750 TI

获取价格

 		LM2750 Low Noise Switched Capacitor Boost Regulator
LM2750LD-5.0 NSC

获取价格

 		Low Noise, 5.0V Regulated Switched Capacitor Voltage Converter
LM2750LD-5.0 TI

获取价格

 		LM2750 Low Noise Switched Capacitor Boost Regulator

与LM2748相关文章

您还可以找


热门产品
PCB打样/小批量
铝基板
BOM智能配单
PCBA制造
钣金
精密CNC
模具注塑
薄膜开关
精选活动
PCBA打样特惠
四六层板品质升级
铝基板品质升级
一体化电子制造
DFM下载
服务支持
企业认证
产品展示
工厂展示
工艺能力
积分商城
关于捷配
捷配简介
企业文化
公司动态
人才招聘
联系我们
帮助中心
下单流程
付款流程
开票流程
常见问题
全球PCB制造服务专线 400-613-0088

工作时间：9:00-21:00

CEO邮箱：ceo@jiepei.com

投诉邮箱：tousu@jiepei.com

捷配网-微信公众号 微信公众号
捷配网-微信公众号 抖音公众号
资质认证：
合作快递：
支付方式：
Copyright © 2024 Jiepei.com Inc. All Rights Reserved. 版权所有:杭州捷配信息科技有限公司 浙公网安备 33010502006866号 浙ICP备10014259号-119 营业执照ICP证