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LT3957IUHE#PBF PDF预览

LT3957IUHE#PBF

更新时间： 2024-11-23 20:41:55
品牌 Logo 应用领域
凌特 - Linear 开关
页数 文件大小 规格书
28页 359K
描述
LT3957 - Boost, Flyback, SEPIC and Inverting Converter with 5A, 40V Switch; Package: QFN; Pins: 36; Temperature Range: -40°C to 85°C

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中文翻译

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LT3957IUHE#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：QFN包装说明：HVQCCN, LCC28/36,.19X.23,20
针数：36Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：7.58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封装等效代码：LCC28/36,.19X.23,20
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子类别：Switching Regulator or Controllers
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 (Sn)
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

LT3957IUHE#PBF 数据手册

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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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LT3957IUHE#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LT3957IUHE#TRPBF Linear

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 LT3957 - Boost, Flyback, SEPIC and Inverting Converter with 5A, 40V Switch; Package: QFN;

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