5秒后页面跳转
捷配首页

Datasheet > LT1940EFE
LT1940EFE PDF预览

LT1940EFE

更新时间： 2024-10-02 22:07:19
品牌 Logo 应用领域
凌特 - Linear 稳压器开关
页数 文件大小 规格书
20页 259K
描述
Dual Monolithic 1.4A, 1.1MHz Step-Down Switching Regulator

阅读下载

中文翻译

获取价格

LT1940EFE 技术参数

是否Rohs认证： 不符合生命周期：Transferred
零件包装代码：TSSOP包装说明：HTSSOP, TSSOP16,.25
针数：16Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.12模拟集成电路 - 其他类型：SWITCHING REGULATOR
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：25 V最小输入电压：3.6 V
标称输入电压：5 VJESD-30 代码：R-PDSO-G16
JESD-609代码：e0长度：5 mm
湿度敏感等级：1功能数量：2
端子数量：16最高工作温度：85 °C
最低工作温度：-40 °C最大输出电流：1.4 A
封装主体材料：PLASTIC/EPOXY封装代码：HTSSOP
封装等效代码：TSSOP16,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：235
认证状态：Not Qualified座面最大高度：1.1 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：BUCK最大切换频率：1350 kHz
技术：BIPOLAR温度等级：INDUSTRIAL
端子面层：Tin/Lead (Sn/Pb)端子形式：GULL WING
端子节距：0.65 mm端子位置：DUAL
处于峰值回流温度下的最长时间：20宽度：4.4 mm
Base Number Matches：1

LT1940EFE 数据手册

 浏览型号LT1940EFE的Datasheet PDF文件第2页浏览型号LT1940EFE的Datasheet PDF文件第3页浏览型号LT1940EFE的Datasheet PDF文件第4页浏览型号LT1940EFE的Datasheet PDF文件第5页浏览型号LT1940EFE的Datasheet PDF文件第6页浏览型号LT1940EFE的Datasheet PDF文件第7页 
Final Electrical Specifications  
LT1940  
Dual Monolithic 1.4A,  
1.1MHz Step-Down Switching Regulator  
U
August 2002  
DESCRIPTIO  
FEATURES  
The LT®1940 is a dual current mode PWM step-down  
DC/DC converter with internal 2A power switches. Both  
converters are synchronized to a single 1.1MHz oscillator  
and run with opposite phases, reducing input ripple cur-  
rent. The output voltages are set with external resistor  
dividers, and each regulator has independent shutdown  
and soft-start circuits. Each regulator generates a power-  
good signal when its output is in regulation, easing power  
supply sequencing and interfacing with microcontrollers  
and DSPs.  
■
Wide Input Voltage Range: 3.6V to 25V  
Two 1.4A Output Switching Regulators with  
Internal Power Switches  
■
■
■
■
■
■
Small 16-Lead TSSOP Surface Mount Package  
Constant 1.1MHz Switching Frequency  
Anti-Phase Switching Reduces Ripple  
Independent Shutdown/Soft-Start Pins  
Independent Power Good Indicators Ease  
Supply Sequencing  
■
Uses Small Inductors and Ceramic Capacitors  
U
The LT1940’s 1.1MHz switching frequency allows the use  
of tiny inductors and capacitors, resulting in a very small  
dual 1.4A output solution. Constant frequency and ce-  
ramic capacitors combine to produce low, predictable  
output ripple voltage. With its wide input range of 3.6V to  
25V,theLT1940regulatesawidevarietyofpowersources,  
from 4-cell batteries and 5V logic rails to unregulated wall  
transformers, lead acid batteries and distributed-power  
supplies. A current mode PWM architecture provides fast  
transient response with simple compensation compo-  
nents and cycle-by-cycle current limiting. Frequency  
foldbackandthermalshutdownprovideadditionalprotec-  
tion.  
APPLICATIO S  
■
Disk Drives  
■
DSP Power Supplies  
■
Wall Transformer Regulation  
Distributed Power Regulation  
DSL Modems  
Cable Modems  
■
■
■
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATIO  
V
IN  
7V TO 25V  
Efficiency vs Load Current  
4.7µF  
CMDSH-3  
100  
V
IN  
CMDSH-3  
V
= 12V  
OUT2  
5V  
IN  
BOOST1 BOOST2  
LT1940  
1.4A  
0.1µF  
0.1µF  
90  
80  
70  
60  
3.3µH  
4.7µH  
OUT1  
3.3V  
1.4A  
V
= 5V  
OUT  
SW1  
SW2  
UPS140  
16.5k  
UPS140  
30.1k  
FB1  
FB2  
V
= 3.3V  
OUT  
V
C1  
V
C2  
10µF  
15k  
15k  
10.0k  
RUN/SS1  
PG1  
PG2  
10.0k  
100k  
330pF  
1nF  
RUN/SS2  
10µF  
330pF  
GND  
0
0.5  
1.0  
1.5  
POWER  
GOOD  
1940 F01  
LOAD CURRENT (A)  
1940 F01b  
Figure 1. 3.3V and 5V Dual Output Step-Down  
Converter with Output Sequencing  
1940i  
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.  
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-  
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.  
1
1234567...20

中文翻译

下载PDF

与LT1940EFE相关器件

型号 品牌 获取价格 描述 数据表
LT1940EFE#PBF Linear

获取价格

 		LT1940 - Dual Monolithic 1.4A, 1.1MHz Step-Down Switching Regulator; Package: TSSOP; Pins:
LT1940EFE#TR Linear

获取价格

 		LT1940 - Dual Monolithic 1.4A, 1.1MHz Step-Down Switching Regulator; Package: TSSOP; Pins:
LT1940EFE#TRMPBF Linear

获取价格

 		Dual Switching Controller
LT1940EFE#TRPBF Linear

获取价格

 		LT1940 - Dual Monolithic 1.4A, 1.1MHz Step-Down Switching Regulator; Package: TSSOP; Pins:
LT1940L_15 Linear

获取价格

 		Dual Monolithic 1.4A, 1.1MHz Step-Down Switching Regulator
LT1940LEFE Linear

获取价格

 		LT1940 - Dual Monolithic 1.4A, 1.1MHz Step-Down Switching Regulator; Package: TSSOP; Pins:
LT1940LEFE#PBF Linear

获取价格

 		LT1940 - Dual Monolithic 1.4A, 1.1MHz Step-Down Switching Regulator; Package: TSSOP; Pins:
LT1940LEFE#TRPBF Linear

获取价格

 		LT1940 - Dual Monolithic 1.4A, 1.1MHz Step-Down Switching Regulator; Package: TSSOP; Pins:
LT1941 Linear

获取价格

 		Triple Monolithic Switching Regulator
LT1941 ADI

获取价格

 		三通道、单片式开关稳压器

与LT1940EFE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