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LT3641IFE#PBF

更新时间： 2024-01-14 02:19:12
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
28页 451K
描述
LT3641 - Dual Monolithic Buck Regulator with Power-On Reset and Watchdog Timer; Package: TSSOP; Pins: 28; Temperature Range: -40°C to 85°C

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中文翻译

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LT3641IFE#PBF 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Active包装说明：HTSSOP,
针数：28Reach Compliance Code：compliant
风险等级：5.14其他特性：ALSO HAS CONTROL TECHNIQUE OF PFM
模拟集成电路 - 其他类型：DUAL SWITCHING CONTROLLER控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：30 V
最小输入电压：5 V标称输入电压：12 V
JESD-30 代码：R-PDSO-G28JESD-609代码：e3
长度：9.7 mm功能数量：1
端子数量：28最高工作温度：125 °C
最低工作温度：-40 °C最大输出电流：3.4 A
封装主体材料：PLASTIC/EPOXY封装代码：HTSSOP
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）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：1.2 mm表面贴装：YES
切换器配置：PHASE-SHIFT最大切换频率：2350 kHz
温度等级：AUTOMOTIVE端子面层：MATTE TIN
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：NOT SPECIFIED
宽度：4.4 mmBase Number Matches：1

LT3641IFE#PBF 数据手册

 浏览型号LT3641IFE#PBF的Datasheet PDF文件第2页浏览型号LT3641IFE#PBF的Datasheet PDF文件第3页浏览型号LT3641IFE#PBF的Datasheet PDF文件第4页浏览型号LT3641IFE#PBF的Datasheet PDF文件第5页浏览型号LT3641IFE#PBF的Datasheet PDF文件第6页浏览型号LT3641IFE#PBF的Datasheet PDF文件第7页 
LT3641  
Dual Monolithic Buck  
Regulator with Power-On  
Reset and Watchdog Timer  
FEATURES  
DESCRIPTION  
TheLT®3641isadualchannel,currentmodemonolithicbuck  
switching regulator with a power-on reset and a watchdog  
timer.Bothregulatorsaresynchronizedtoasingleoscillator  
with an adjustable frequency (350kHz to 2.5MHz). At light  
loads, both regulators operate in low ripple Burst Mode®  
to maintain high efficiency and low output ripple.  
n
High Voltage Buck Regulator:  
4V to 42V Operating Range  
1.3A Output Current  
n
Input Transient Protection to 55V  
n
Low Voltage Synchronous Buck Regulator:  
2.5V to 5.5V Input Voltage Range  
1.1A Output Current  
The high voltage channel is a nonsynchronous buck with  
an internal 2.4A top switch that operates from an input  
of 4V to 42V and input transient protection to 55V. The  
low voltage channel operates from an input of 2.5V to  
5.5V. Internal synchronous power switches provide high  
efficiency without the need of external Schottky diode.  
Bothchannelshavecycle-by-cyclecurrentlimit,providing  
protection against shorted outputs.  
n
Synchronizable, Adjustable 350kHz to 2.5MHz  
Switching Frequency  
Programmable Power-On Reset Timer  
Programmable Window Mode Watchdog Timer  
Typical Quiescent Current: 290μA  
Short-Circuit Robust  
Programmable Soft-Start  
Low Shutdown Current: I < 1μA  
Thermal Shutdown  
Available in Thermally Enhanced 28-Lead  
(4mm × 5mm) QFN and 28-Lead TSSOP Packages  
n
n
n
n
n
n
Q
n
n
The power-on reset and watchdog timeout periods are  
both adjustable using external capacitors. The window  
mode watchdog timer flags when the μP pulses group  
too close together or too far apart.  
APPLICATIONS  
The LT3641 is available in a 28-pin 4mm × 5mm QFN  
package and 28-pin TSSOP package. Both packages have  
an exposed pad for low thermal resistance.  
n
Industrial Power Supplies  
n
Automotive Electronic Control Units  
L, LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks  
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners.  
TYPICAL APPLICATION  
2MHz 5V/0.8A and 3.3V/0.5A Step Down Regulators  
HV Channel Efficiency,  
2MHz, VOUT1 = 5V  
LV Channel Efficiency,  
2MHz, VOUT2 = 3.3V  
0.22μF  
V
IN  
7V TO 42V*  
10μF  
4.7μH  
301k  
V
OUT1  
90  
85  
80  
75  
70  
95  
90  
85  
80  
75  
70  
EN/UVLO  
V
SW  
BST SW1  
IN  
5V/0.8A  
SYNC  
WDE  
PGOOD2  
22μF  
DA  
FB1  
V
IN  
= 12V  
V
IN2  
= 5V  
100k  
V
OUT1  
100k  
100k  
LT3641  
V
IN2  
RST1  
RST2  
WDO  
WDI  
EN2  
2.2μH  
μP  
V
OUT2  
SW2  
3.3V/0.5A  
226k  
22μF  
CWDT  
CPOR  
FB2  
RT GND SS2 SS1  
49.9k  
1nF  
1.5nF  
1.5nF  
32.4k  
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4  
CURRENT (A)  
0
0.2  
0.4  
0.6  
0.8  
1.0  
1.2  
1nF  
V
V
OUT2  
CURRENT (A)  
OUT1  
3641 TA01a  
3641 TA01b  
3641 TA01c  
* FOR INPUT VOLTAGES ABOVE 42V RESTRICTIONS APPLY  
3641fa  
1
1234567...28

中文翻译

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LT3641IFE#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LT3641EFE#TRPBF Linear

完全替代

 LT3641 - Dual Monolithic Buck Regulator with Power-On Reset and Watchdog Timer; Package: T

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