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MAX1951A

更新时间： 2024-10-04 14:57:43
品牌 Logo 应用领域
亚德诺 - ADI 调节器
页数 文件大小 规格书
12页 945K
描述
1MHz、2A、2.6V至5.5V输入、PWM DC-DC降压调节器，具有使能控制

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MAX1951A 数据手册

 浏览型号MAX1951A的Datasheet PDF文件第2页浏览型号MAX1951A的Datasheet PDF文件第3页浏览型号MAX1951A的Datasheet PDF文件第4页浏览型号MAX1951A的Datasheet PDF文件第5页浏览型号MAX1951A的Datasheet PDF文件第6页浏览型号MAX1951A的Datasheet PDF文件第7页 
19-4689; Rev 0; 7/09  
1MHz, 2A, 2.6V to 5.5V Input, PWM DC-DC  
Step-Down Regulator with Enable  
MX951A  
General Description  
Features  
The MAX1951A high-efficiency, DC-DC step-down  
switching regulator delivers up to 2A of output current.  
The device operates from an input voltage range of 2.6V  
to 5.5V and provides an adjustable output voltage from  
2
o Compact 0.385in Circuit Footprint  
o 10µF Ceramic Input and Output Capacitors, 2µH  
Inductor for 2A Output  
0.8V to V , making the MAX1951A ideal for on-board  
IN  
o Efficiency Up to 94%  
o 1.5% Output Accuracy Over Load, Line, and  
postregulation applications. The MAX1951A total output  
error is less than 1.5ꢀ over load, line, and temperature.  
Temperature  
The MAX1951A operates at a fixed frequency of 1MHz  
with an efficiency of up to 94ꢀ. The high operating fre-  
quency minimizes the size of external components.  
Internal soft-start control circuitry reduces inrush current.  
Short-circuit and thermal-overload protection improve  
design reliability.  
o Guaranteed 2A Output Current  
o Operates from 2.6V to 5.5V Supply  
o Adjustable Output from 0.8V to V  
o Internal Digital Soft-Soft  
o Short-Circuit and Thermal-Overload Protection  
IN  
The MAX1951A can start up safely with a prebiased or  
without a preexisting output. This feature simplifies track-  
ing supply designs for core and I/O applications and  
redundant supply designs.  
o 1MHz Switching Frequency Reduces Component  
Size  
The MAX1951A is available in an 8-pin SO package  
and operates over the -40°C to +85°C extended tem-  
perature range.  
o Enable Input Audio Shutdown for Reducing  
Power Consumption  
o Safe Startup into Prebiased Output  
Applications  
ASIC/DSP/µP/FPGA Core and I/O Voltages  
Ordering Information  
Set-Top Boxes  
PART  
TEMP RANGE  
PIN-PACKAGE  
Networking and Telecommunications  
MAX1951AESA+  
-40°C to +85°C  
8 SO  
Servers  
TVs  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
Pin Configuration  
Typical Operating Circuit  
OUTPUT  
0.8V TO V , UP TO 2A  
INPUT  
2.6V TO 5.5V  
IN  
TOP VIEW  
IN  
LX  
FB  
EN  
+
MAX1951A  
V
1
2
3
4
8
7
6
5
IN  
CC  
V
CC  
EN  
GND  
FB  
LX  
MAX1951A  
PGND  
COMP  
ON  
OFF  
COMP  
PGND  
GND  
SO  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,  
or visit Maxim’s website at www.maxim-ic.com.  
1234567...12

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