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LT1941EFE#PBF

更新时间： 2024-12-01 21:21:03
品牌 Logo 应用领域
凌特 - Linear 开关光电二极管
页数 文件大小 规格书
24页 226K
描述
LT1941 - Triple Monolithic Switching Regulator; Package: TSSOP; Pins: 28; Temperature Range: -40°C to 85°C

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LT1941EFE#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：TSSOP包装说明：HTSSOP, TSSOP28,.25
针数：28Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：3.5模拟集成电路 - 其他类型：SWITCHING REGULATOR
控制模式：CURRENT-MODE控制技术：CONSTANT OFF TIME
最大输入电压：25 V最小输入电压：3.5 V
标称输入电压：5 VJESD-30 代码：R-PDSO-G28
JESD-609代码：e3长度：9.7 mm
湿度敏感等级：1功能数量：1
端子数量：28最高工作温度：70 °C
最低工作温度：最大输出电流：6 A
封装主体材料：PLASTIC/EPOXY封装代码：HTSSOP
封装等效代码：TSSOP28,.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）：260
认证状态：Not Qualified座面最大高度：1.2 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
温度等级：COMMERCIAL端子面层：Matte Tin (Sn)
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：30
宽度：4.4 mmBase Number Matches：1

LT1941EFE#PBF 数据手册

 浏览型号LT1941EFE#PBF的Datasheet PDF文件第2页浏览型号LT1941EFE#PBF的Datasheet PDF文件第3页浏览型号LT1941EFE#PBF的Datasheet PDF文件第4页浏览型号LT1941EFE#PBF的Datasheet PDF文件第5页浏览型号LT1941EFE#PBF的Datasheet PDF文件第6页浏览型号LT1941EFE#PBF的Datasheet PDF文件第7页 
LT1941  
Triple Monolithic  
Switching Regulator  
FEATURES  
DESCRIPTION  
The LT®1941 is a triple current mode DC/DC converter  
with internal power switches. Two of the regulators are  
step-down converters with 3A and 2A power switches.  
The third regulator can be configured as a boost, inverter  
or SEPIC converter and has a 1.5A power switch. All  
three converters are synchronized to a 1.1MHz oscillator.  
The two step-down converters run with opposite phase,  
reducing input ripple current. 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.  
n
Wide Input Range: 3.5V to 25V  
Three Switching Regulators with Internal Power  
n
Switches: 3A Step-Down, 2A Step-Down,  
1.5A Inverting/Boost  
n
Antiphase Switching Reduces Ripple  
n
Independent Shutdown/Soft-Start Pins  
n
Independent Power Good Indicators Ease Supply  
Sequencing  
n
Input Voltage Power Good Indicators Monitor Input  
Supply  
n
Uses Small Inductors and Ceramic Capacitors  
n
Constant 1.1MHz Switching Frequency  
n
Thermally Enhanced 28-Lead TSSOP Package  
The high switching frequency offers several advantages  
by permitting the use of small inductors and ceramic  
capacitors, leading to a very small triple output solution.  
The constant switching frequency, combined with low  
impedance ceramic capacitors, result in low, predictable  
output ripple. With its wide input voltage range of 3.5V to  
25V, the LT1941 regulates a broad array of power sources  
from 4-cell batteries and 5V logic rails to unregulated wall  
transformers, lead acid batteries and distributed-power  
supplies.  
APPLICATIONS  
n
Cable Modems  
n
DSL Modems  
n
Distributed Power Regulation  
Wall Transformer Regulation  
Disk Drives  
DSP Power  
n
n
n
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other  
trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
V
V
OUT2  
OUT1  
V
IN  
4.7V TO 14V  
130k 100k  
100k  
100k  
100k  
V
IN  
PGOOD1  
PGOOD1  
Start-Up Waveforms  
5GOOD  
PGOOD2  
5GOOD PGOOD2  
12GOOD PGOOD3  
BOOST1 BOOST2  
LT1941  
with Sequencing  
12GOOD  
PGOOD3  
0.22μF  
3300pF  
0.22μF  
10.7k  
3μH  
33μF  
22μH  
3.3μH  
RUN/SS  
V
OUT1  
1.8V  
2.4A  
2V/DIV  
SW1  
SW2  
V
3.3V  
1.4A  
13.7k  
OUT2  
FB1  
FB2  
V
OUT1  
1000pF  
1.5nF  
2V/DIV  
V
C1  
V
C2  
22μF  
V
OUT2  
10k 2.49k  
22nF  
7.32k 3.3k  
5V/DIV  
1.5nF  
RUNSS1 RUNSS2  
V
OUT3  
10V/DIV  
SW3  
NFB  
BIAS1  
BIAS2  
1μF  
22μH  
10μF  
I
V
VIN(AVE)  
1A/DIV  
OUT3  
V
C3  
13.7k  
133k  
–12V  
350mA*  
PGOOD2  
5V/DIV  
FB3  
RUNSS3  
1.5k  
GND  
1941 F01b  
1.5nF  
2ms/DIV  
10μF  
1941 F01  
*240mA AT V = 5V, 550mA AT V = 12V  
IN IN  
Figure 1. Triple Output Power Supply: 3.3V, 1.8V, –12V  
1941fb  
1
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中文翻译

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LT1941EFE#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LT1941EFE Linear

类似代替

 Triple Monolithic Switching Regulator

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