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LT3640EFE#PBF PDF预览

LT3640EFE#PBF

更新时间： 2023-01-03 11:00:05
品牌 Logo 应用领域
亚德诺 - ADI 开关光电二极管
页数 文件大小 规格书
24页 510K
描述
Dual Monolithic Buck Regulator with Power-On Reset and Watchdog Timer

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中文翻译

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LT3640EFE#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：4.40 MM, LEAD FREE, PLASTIC, TSSOP-28
针数：28Reach Compliance Code：compliant
风险等级：5.17Is Samacsys：N
其他特性：PFM CONTROL TECHNIQUE ALSO POSSIBLE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 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：125 °C
最低工作温度：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）：260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：OTHER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

LT3640EFE#PBF 数据手册

 浏览型号LT3640EFE#PBF的Datasheet PDF文件第2页浏览型号LT3640EFE#PBF的Datasheet PDF文件第3页浏览型号LT3640EFE#PBF的Datasheet PDF文件第4页浏览型号LT3640EFE#PBF的Datasheet PDF文件第5页浏览型号LT3640EFE#PBF的Datasheet PDF文件第6页浏览型号LT3640EFE#PBF的Datasheet PDF文件第7页 
LT3640  
Dual Monolithic Buck  
Regulator with Power-On  
Reset and Watchdog Timer  
FeaTures  
DescripTion  
The LT®3640 is a dual channel, current mode monolithic  
buck switching regulator with a power-on reset and a  
watchdog timer. Both regulators are synchronized to a  
single oscillator 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 35V Operating Range  
1.3A Output Current  
n
OVLO Protects Input to 55V  
n
Low Voltage Synchronous Buck Regulator:  
2.5V to 5.5V Input Voltage Range  
1.1A Output Current  
n
Synchronizable, Adjustable 350kHz to 2.5MHz  
The high voltage channel is a nonsynchronous buck with  
an internal 2.4A top switch that operates from an input  
of 4V to 35V; a 36.5V OVLO protects the device 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.  
Switching Frequency  
Programmable Power-On Reset Timer  
Programmable Window Mode Watchdog Timer  
Typical Quiescent Current: 290µA  
n
n
n
n
Short-Circuit Robust  
Programmable Soft-Start  
Low Shutdown Current: I < 1µA  
Available in Thermally Enhanced 28-Lead  
n
n
Q
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.  
(4mm × 5mm) QFN and 28-Lead TSSOP Packages  
applicaTions  
n
Industrial Power Supplies  
Automotive Electronic Control Units  
The LT3640 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
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 3.3V/0.8A and 1.8V/0.8A Step Down Regulators  
HV Channel Efficiency,  
2MHz, VOUT1 = 3.3V  
LV Channel Efficiency,  
2MHz, VOUT2 = 1.8V  
0.22µF  
V
IN  
5V TO 35V  
10µF  
3.3µH  
80.6k  
90  
85  
80  
75  
70  
90  
85  
80  
75  
70  
V
OUT1  
EN/UVLO  
V
SW  
BST SW1  
IN  
3.3V/0.8A  
V
= 3.3V  
IN2  
SYNC  
WDE  
PGOOD  
22µF  
DA  
FB1  
V
= 12V  
IN  
49.9k  
V
OUT1  
100k  
µP  
100k  
LT3640  
V
IN2  
RST1  
RST2  
WDO  
WDI  
EN2  
1µH  
V
OUT2  
SW2  
1.8V/0.8A  
100k  
22µF  
CWDT  
CPOR  
FB2  
RT GND SS2 SS1  
49.9k  
0
0.2  
0.4  
0.6  
0.8  
1.0  
1.2  
0
0.2  
0.4  
0.6  
0.8  
1
1nF  
1.5nF  
1.5nF  
32.4k  
V
CURRENT (A)  
V
OUT2  
CURRENT (A)  
OUT1  
1nF  
3640 TA01b  
3640 TA01c  
3640 TA01a  
3640f  
ꢀ
1234567...24

中文翻译

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