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MAX777LESA+

更新时间： 2024-11-05 20:07:55
品牌 Logo 应用领域
美信 - MAXIM 光电二极管
页数 文件大小 规格书
12页 121K
描述
Switching Regulator, Current-mode, 1A, 150kHz Switching Freq-Max, PDSO8, 0.150 INCH, SOIC-8

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中文翻译

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MAX777LESA+ 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：SOIC
包装说明：SOP,针数：8
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.23
Base Number Matches：1

MAX777LESA+ 数据手册

 浏览型号MAX777LESA+的Datasheet PDF文件第2页浏览型号MAX777LESA+的Datasheet PDF文件第3页浏览型号MAX777LESA+的Datasheet PDF文件第4页浏览型号MAX777LESA+的Datasheet PDF文件第5页浏览型号MAX777LESA+的Datasheet PDF文件第6页浏览型号MAX777LESA+的Datasheet PDF文件第7页 
19-0186; Rev 2; 7/96  
Lo w -Vo lt a g e In p u t , 3 V/3 .3 V/5 V/  
Ad ju s t a b le Ou t p u t , S t e p -Up DC-DC Co n ve rt e rs  
8/MAX79L  
_______________Ge n e ra l De s c rip t io n  
____________________________Fe a t u re s  
♦ 1V to 4.5V Input Guarantees Start-Up Under Load  
♦ Up to 210mA Output  
The MAX777L/MAX778L/MAX779L are pulse-skipping DC-DC  
converters that step up from low-voltage inputs (1V guaran-  
teed). They require only three external components—an induc-  
tor (typically 22µH) and two capacitors. The MAX777L delivers  
a 5V output, the MAX778L generates pin-selectable voltages of  
3.0V or 3.3V, and the MAX779L output can be adjusted from  
2.5V to 6V through an external resistive divider.  
♦ Load Fully Disconnected in Shutdown  
♦ 82% Efficiency  
♦ Output in Regulation with Input Voltage above  
The devices include an Active RectifierTM that eliminates the  
need for an external catch diode, and permits regulation even  
when the input is greater than the output. Also, unlike those in  
other step-up converters, the MAX777L/MAX778L/MAX779L’s  
Active RectifierTM turns off in the shutdown mode, disconnect-  
ing the output from the source. This eliminates the current drain  
associated with conventional step-up converters when off or in  
shutdown.  
Output Voltage  
♦ Internal 1A Power Switch and Active Rectifier  
♦ Adjustable Current Limit Allows Low-Cost  
Inductors  
♦ 190µA No Load Supply Current  
♦ 20µA Shutdown Supply Current  
High-frequency operation (up to 150kHz) allows the use of  
small, surface-mount inductors with values of 10µH or less.  
Supply current is 190µA under no load and only 20µA in stand-  
by mode; supply voltage can range from 1V to 4.5V (1 to 3  
cells). With a 2V input, the devices typically deliver 200mA at  
5V, or 300mA at 3V.  
♦ 3V/3.3V (MAX778L), 5V (MAX777L), and  
Adjustable (MAX779L) Output Voltage  
______________Ord e rin g In fo rm a t io n  
PART  
TEMP. RANGE  
0°C to +70°C  
PIN-PACKAGE  
8 Plastic DIP  
8 SO  
For fully specified devices designed for step-up/step-down  
applications (where the input can be above or below the out-  
put), refer to the MAX877L/MAX878L/MAX879L data sheet.  
MAX777LCPA  
MAX777LCSA  
MAX777LC/D  
MAX777LEPA  
MAX777LESA  
MAX777LMJA  
0°C to +70°C  
0°C to +70°C  
Dice*  
________________________Ap p lic a t io n s  
-40°C to +85°C  
-40°C to +85°C  
-55°C to +125°C  
8 Plastic DIP  
8 SO  
Single Battery-Cell (1V), Step-Up Voltage Conversion  
Efficient, High-Power Step-Up Regulation from  
Low Input Voltages  
8 CERDIP**  
Ordering Information continued at end of data sheet.  
* Dice are specified at T = +25°C, DC parameters only.  
A
Pagers  
**Contact factory for availability and processing to MIL-STD-883.  
Portable Instruments & Hand-Held Terminals  
Notebook and Palmtop Computers  
__________________P in Co n fig u ra t io n  
__________Typ ic a l Op e ra t in g Circ u it  
INPUT  
1V TO 4.5V  
TOP VIEW  
2
22µF  
22µH  
IN  
*
ILIM  
IN  
1
2
3
4
8
7
6
5
N.C. (MAX777L)  
5
6
1
7
SHDN  
OUT  
LX  
MAX777L  
ILIM  
SHDN  
LX  
MAX777L  
MAX778L  
MAX779L  
AGND  
PGND  
OUTPUT  
5V  
ON/OFF  
OUT  
100µF  
PGND  
AGND  
3
DIP/SO  
4
* SEL FOR MAX778L, FB FOR MAX779L.  
Active Rectifier is a trademark of Maxim Integrated Products.  
________________________________________________________________ Maxim Integrated Products  
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800  
1234567...12

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