5秒后页面跳转
捷配首页

Datasheet > LT1939EDD
LT1939EDD PDF预览

LT1939EDD

更新时间： 2024-12-02 01:16:15
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
24页 354K
描述
Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller

阅读下载

中文翻译

获取价格

LT1939EDD 数据手册

 浏览型号LT1939EDD的Datasheet PDF文件第2页浏览型号LT1939EDD的Datasheet PDF文件第3页浏览型号LT1939EDD的Datasheet PDF文件第4页浏览型号LT1939EDD的Datasheet PDF文件第5页浏览型号LT1939EDD的Datasheet PDF文件第6页浏览型号LT1939EDD的Datasheet PDF文件第7页 
LT1939  
Monolithic 2A Step-Down  
Regulator Plus Linear  
Regulator/Controller  
FEATURES  
DESCRIPTION  
The LT®1939 is a current mode PWM step-down DC/DC  
converter with an internal 2.3A switch. The wide input  
range of 3V to 25V makes the LT1939 suitable for regu-  
lating power from a wide variety of sources, including  
automotive batteries, industrial supplies and unregulated  
wall adapters.  
n
Wide Input Range: 3V to 25V  
n
Short-Circuit Protected Over Full Input Range  
n
2A Output Current Capability  
n
Adjustable/Synchronizable Fixed Frequency  
Operation from 250kHz to 2.2MHz  
n
Soft-Start/Tracking Capability  
n
Output Adjustable Down to 0.8V  
Resistor-programmable 250kHz to 2.2MHz frequency  
range and synchronization capability enable optimization  
between efficiency and external component size. Cycle-  
by-cycle current limit, frequency foldback and thermal  
shutdown provide protection against a shorted output.  
The soft-start feature controls the ramp rate of the output  
voltage, eliminating input current surge during start-up,  
and also provides output tracking.  
n
Adjustable Linear Regulator/Driver with 13mA  
Output Capability  
n
Power Good Comparator with Complementary  
Outputs  
Low Shutdown Current: 12μA  
n
n
Thermally Enhanced 3mm × 3mm DFN Package  
APPLICATIONS  
The LT1939 contains an internal NPN transistor with feed-  
back control which can be configured as a linear regulator  
or as a linear regulator controller.  
n
Automotive Battery Regulation  
n
Industrial Control  
n
Wall Transformer Regulation  
Distributed Power Regulation  
n
TheLT1939’slowcurrentshutdownmode(<12μA)enables  
easy power management in battery-powered systems.  
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
Dual Step-Down Converters  
Switching Converter Efficiency  
Output Voltage Ripple  
90  
BAT54  
V
IN  
6V TO 25V  
2.2μF  
V
BST  
SW  
IN  
85  
80  
75  
70  
65  
60  
55  
50  
0.47μF  
6.8μH  
LT1939  
V
5V  
1A  
OUT1  
V
OUT1  
= 5V AT 1A  
AC COUPLED  
2mV/DIV  
B240A  
SHDN  
SS  
42.2k  
22μF  
0.47μF  
FB  
PG  
PG  
8.06k  
V
= 3.3V AT 1A  
AC COUPLED  
2mV/DIV  
OUT2  
R
V
SYNC LDRV  
V
OUT2  
= 12V  
T/  
IN  
I
= 0A  
53.6k  
330pF  
C
1k  
FREQUENCY = 800kHz  
V
24.9k  
8.06k  
OUT2  
3.3V  
1A  
1939 TA01c  
LFB  
500ns/DIV  
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0  
40.2k  
22μF  
LOAD CURRENT (A)  
1939 TA01b  
1939 TA01a  
1939f  
1
1234567...24

中文翻译

下载PDF

与LT1939EDD相关器件

型号 品牌 获取价格 描述 数据表
LT1939EDD#PBF Linear

获取价格

 		LT1939 - Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller; Package: DFN;
LT1939EDD#TRPBF Linear

获取价格

 		LT1939 - Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller; Package: DFN;
LT1939EDD-PBF Linear

获取价格

 		Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller
LT1939EDD-TRPBF Linear

获取价格

 		Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller
LT1939IDD#PBF Linear

获取价格

 		LT1939 - Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller; Package: DFN;
LT1939IDD#TRPBF Linear

获取价格

 		LT1939 - Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller; Package: DFN;
LT1939IDD-PBF Linear

获取价格

 		Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller
LT1939IDD-TRPBF Linear

获取价格

 		Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller
LT1940 Linear

获取价格

 		Dual Monolithic 1.4A, 1.1MHz Step-Down Switching Regulator
LT1940 ADI

获取价格

 		双通道、单片 1.4A、1.1MHz 降压型开关稳压器

与LT1939EDD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