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LT3581IDE-PBF

更新时间： 2024-01-03 04:24:35
品牌 Logo 应用领域
凌特 - Linear 转换器
页数 文件大小 规格书
36页 497K
描述
3.3A Boost/Inverting DC/DC Converter with Fault Protection

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LT3581IDE-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：16Reach Compliance Code：compliant
风险等级：5.15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：22 V
最小输入电压：2.5 V标称输入电压：5 V
JESD-30 代码：R-PDSO-G16JESD-609代码：e3
长度：4.039 mm湿度敏感等级：1
功能数量：1端子数量：16
最高工作温度：125 °C最低工作温度：-40 °C
最大输出电流：5.4 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峰值回流温度（摄氏度）：NOT SPECIFIED
认证状态：Not Qualified座面最大高度：1.1 mm
表面贴装：YES切换器配置：BOOST
最大切换频率：2750 kHz技术：BIPOLAR
温度等级：AUTOMOTIVE端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：0.5 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：3 mmBase Number Matches：1

LT3581IDE-PBF 数据手册

 浏览型号LT3581IDE-PBF的Datasheet PDF文件第2页浏览型号LT3581IDE-PBF的Datasheet PDF文件第3页浏览型号LT3581IDE-PBF的Datasheet PDF文件第4页浏览型号LT3581IDE-PBF的Datasheet PDF文件第5页浏览型号LT3581IDE-PBF的Datasheet PDF文件第6页浏览型号LT3581IDE-PBF的Datasheet PDF文件第7页 
LT3581  
3.3A Boost/Inverting DC/DC  
Converter with Fault Protection  
FeaTures  
DescripTion  
The LT®3581 is a PWM DC/DC converter with built-in fault  
protection features to aid in protecting against output  
shorts, input/output overvoltages, and overtemperature  
conditions. The part consists of a 42V master switch, and  
a 42V slave switch that can be tied together for a total  
current limit of 3.3A.  
n
3.3A, 42V Combined Power Switch  
n
Master/Slave (1.9A/1.4A) Switch Design  
n
Output Short Circuit Protection  
Wide Input Range: 2.5V to 22V Operating,  
40V Maximum Transient  
Switching Frequency Up to 2.5MHz  
Easily Configurable as a Boost, SEPIC, Inverting or  
Flyback Converter  
User Configurable Undervoltage Lockout  
n
n
n
The LT3581 is ideal for many local power supply designs. It  
canbeeasilyconfiguredinBoost,SEPIC,InvertingorFlyback  
configurations, and is capable of generating 12V at 830mA,  
or–12Vat625mAfroma5Vinput. Inaddition, theLT3581’s  
slaveswitchallowstheparttobeconfiguredinhighvoltage,  
high power charge pump topologies that are very efficient  
and require fewer components than traditional circuits.  
n
n
Low V  
Switch: 250mV at 2.75A (Typical)  
CESAT  
n
n
n
Can be Synchronized to External Clock  
Can Be Synchronized to other Switching Regulators  
High Gain SHDN Pin Accepts Slowly Varying Input  
Signals  
n
TheLT3581’sswitchingfrequencyrangecanbesetbetween  
200kHz and 2.5MHz. The part may be clocked internally at  
a frequency set by the resistor from the RT pin to ground,  
or it may be synchronized to an external clock. A buffered  
version of the clock signal is driven out of the CLKOUT  
pin, and may be used to synchronize other compatible  
switching regulator ICs to the LT3581.  
14-Pin 4mm × 3mm DFN and 16-Lead MSE Packages  
applicaTions  
n
Local Power Supply  
n
Vacuum Fluorescent Display (VFD) Bias Supplies  
n
TFT-LCD Bias Supplies  
Automotive Engine Control Unit (ECU) Power  
The LT3581 also features innovative SHDN pin circuitry  
that allows for slowly varying input signals and an adjust-  
able undervoltage lockout function. Additional features  
such as frequency foldback and soft-start are integrated.  
The LT3581 is available in 14-Pin 4mm × 3mm DFN and  
16-Lead MSE packages.  
n
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
Protected by U.S. Patents, including 7579816.  
Efficiency and Power Loss vs  
Load Current  
Typical applicaTion  
100  
95  
90  
85  
80  
75  
70  
65  
60  
55  
50  
2000  
1800  
1600  
1400  
1200  
1000  
800  
Output Short Protected, 5V to 12V Boost Converter Operating at 2MHz  
1.5µH  
V
OUT  
V
IN  
12V  
5V  
830mA  
4.7µF  
130k  
6.04k  
SW1 SW2  
18.7k  
V
FB  
GATE  
IN  
100k  
FAULT  
V
IN  
4.7µF  
SHDN  
CLKOUT  
600  
RT  
V
C
LT3581  
4.7µF  
10k  
400  
56pF  
SYNC  
SS  
10.5k  
1nF  
43.2k  
200  
GND  
0.1µF  
0
3581 TA01  
0
200  
600  
LOAD CURRENT (mA)  
800  
1000  
400  
3581 TA01b  
3581f  
ꢀ
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