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ELM611DA 参数 Datasheet PDF下载

ELM611DA图片预览
型号: ELM611DA
PDF下载: 下载PDF文件 查看货源
内容描述: 高英法fi效率同步PWM降压型DC / DC转换器 [high efficiency synchronous PWM step down DC/DC converter]
分类和应用: 转换器
文件页数/大小: 11 页 / 976 K
品牌: ELM-TECH [ ELM Technology Corporation ]
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ELM611DA 2A 23V  
high efficiency synchronous PWM step down DC/DC converter  
For external BS diode, ELM recommends IN4148; BS capacitors between 0.1 to 1μF are preferable.  
To improve efficiency when Vin is ≤ 6V, it is possible to add an external Schottky diode between IN and BS.  
Schottky  
(B0520LW)  
BS  
ELM611DA  
Vout  
VIN  
SW  
5V to 6V  
GND  
Add a Schottky diode to improve efficiency when Vin is ≤ 6V.  
*
9. PCB layout guide  
To stabilize the operation, PCB layout is very important. Please take the following guidelines as reference.  
1) Keep the path of switching current as short as possible; minimize the loop area which is connected to input  
capacitor, high-side and low-side MOSFETs.  
2) Bypass ceramic capacitors are recommended to be connected as close to VIN as possible.  
3) Please connect all feedback loop wire in the shortest way. Locate feedback resistors and compensation  
components as close to the chip as possible.  
4) Locate wire of SW away from sensitive analog areas such as FB.  
5) To cool down the operation temperature of the chip and gain higher long-term reliability, please connect  
VIN, SW, and especially GND respectively to a large copper area.  
■Marking  
SOP-8  
Mark  
Content  
ELM  
611DA  
abc  
ELM611DA  
Product name  
Assembly lot No.:  
000 to 999 repeated  
abc  
Rev.1.2  
11 - 8