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LT3957IUHETRPBF PDF预览

LT3957IUHETRPBF

更新时间： 2024-01-18 19:32:04
品牌 Logo 应用领域
凌特 - Linear 转换器开关
页数 文件大小 规格书
28页 359K
描述
Boost, Flyback, SEPIC and Inverting Converter with 5A, 40V Switch

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中文翻译

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LT3957IUHETRPBF 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：HVQCCN,
针数：28Reach Compliance Code：compliant
风险等级：5.18其他特性：ALSO OPERATES AS LDO REGULATOR
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：40 V
最小输入电压：3 V标称输入电压：24 V
JESD-30 代码：R-PQCC-N36JESD-609代码：e3
长度：6 mm湿度敏感等级：1
功能数量：1端子数量：36
最高工作温度：125 °C最低工作温度：-40 °C
最大输出电流：6.8 A封装主体材料：PLASTIC/EPOXY
封装代码：HVQCCN封装形状：RECTANGULAR
封装形式：CHIP CARRIER峰值回流温度（摄氏度）：225
认证状态：Not Qualified座面最大高度：0.8 mm
表面贴装：YES切换器配置：BOOST
最大切换频率：1200 kHz技术：BIPOLAR
温度等级：AUTOMOTIVE端子面层：MATTE TIN
端子形式：NO LEAD端子节距：0.5 mm
端子位置：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：5 mmBase Number Matches：1

LT3957IUHETRPBF 数据手册

 浏览型号LT3957IUHETRPBF的Datasheet PDF文件第2页浏览型号LT3957IUHETRPBF的Datasheet PDF文件第3页浏览型号LT3957IUHETRPBF的Datasheet PDF文件第4页浏览型号LT3957IUHETRPBF的Datasheet PDF文件第5页浏览型号LT3957IUHETRPBF的Datasheet PDF文件第6页浏览型号LT3957IUHETRPBF的Datasheet PDF文件第7页 
LT3957  
Boost, Flyback, SEPIC and  
Inverting Converter  
with 5A, 40V Switch  
FEATURES  
DESCRIPTION  
The LT®3957 is a wide input range, current mode DC/DC  
converter which is capable of generating either positive  
or negative output voltages. It can be configured as either  
a boost, flyback, SEPIC or inverting converter. It features  
an internal low side N-channel power MOSFET rated for  
40V at 5A and driven from an internal regulated 5.2V  
supply. The fixed frequency, current-mode architecture  
results in stable operation over a wide range of supply  
and output voltages.  
n
Wide Input Voltage Range: 3V to 40V  
n
Single Feedback Pin for Positive or Negative  
Output Voltage  
n
Internal 5A/40V Power Switch  
n
Current Mode Control Provides Excellent Transient  
Response  
n
Programmable Operating Frequency (100kHz to  
1MHz) with One External Resistor  
n
Synchronizable to an External Clock  
n
Low Shutdown Current < 1μA  
The operating frequency of LT3957 can be set with an  
external resistor over a 100kHz to 1MHz range, and can  
be synchronized to an external clock using the SYNC pin.  
A minimum operating supply voltage of 3V, and a low  
shutdown quiescent current of less than 1μA, make the  
LT3957 ideally suited for battery-powered systems.  
n
Internal 5.2V Low Dropout Voltage Regulator  
n
Programmable Input Undervoltage Lockout with  
Hysteresis  
Programmable Soft-Start  
n
n
Thermally Enhanced QFN (5mm × 6mm) Package  
The LT3957 features soft-start and frequency foldback  
functions to limit inductor current during start-up.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
APPLICATIONS  
n
Automotive  
No R  
and ThinSOT are trademarks of Linear Technology Corporation.  
SENSE  
n
Telecom  
All other trademarks are the property of their respective owners. Patents pending.  
n
Industrial  
TYPICAL APPLICATION  
High Efficiency Output Boost Converter  
Efficiency vs Output Current  
10μH  
V
OUT  
100  
95  
90  
85  
80  
75  
70  
V
IN  
V
= 12V  
24V  
IN  
4.5V TO 16V  
600mA  
10μF  
s2  
10μF  
200k  
V
SW  
IN  
EN/UVLO  
GND  
95.3k  
LT3957  
SGND  
SYNC  
SENSE1  
226k  
SENSE2  
FBX  
INTV  
CC  
RT SS  
VC  
6.8k  
22nF  
15.8k  
41.2k  
300kHz  
4.7μF  
0.33μF  
0
400  
OUTPUT CURRENT (mA)  
500  
600  
100  
200  
300  
3957 TA01b  
3957 TA01a  
3957f  
1
1234567...28

中文翻译

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