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MAX877EPA

更新时间： 2024-11-20 22:55:11
品牌 Logo 应用领域
美信 - MAXIM 转换器
页数 文件大小 规格书
12页 130K
描述
5V/3.3V/3V/Adjustable-Output, Step-Up/Step-Down DC-DC Converters

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中文翻译

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MAX877EPA 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：DIP
包装说明：DIP, DIP8,.3针数：8
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.91
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：CURRENT-MODE
控制技术：PULSE FREQUENCY MODULATION最大输入电压：6.2 V
最小输入电压：1 VJESD-30 代码：R-PDIP-T8
JESD-609代码：e0长度：9.375 mm
功能数量：1端子数量：8
最高工作温度：85 °C最低工作温度：-40 °C
最大输出电流：0.22 A标称输出电压：5 V
封装主体材料：PLASTIC/EPOXY封装代码：DIP
封装等效代码：DIP8,.3封装形状：RECTANGULAR
封装形式：IN-LINE峰值回流温度（摄氏度）：NOT SPECIFIED
认证状态：Not Qualified座面最大高度：4.572 mm
子类别：Switching Regulator or Controllers最大供电电流 (Isup)：0.31 mA
表面贴装：NO切换器配置：BOOST
最大切换频率：300 kHz技术：BIPOLAR
温度等级：INDUSTRIAL端子面层：Tin/Lead (Sn/Pb)
端子形式：THROUGH-HOLE端子节距：2.54 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：7.62 mmBase Number Matches：1

MAX877EPA 数据手册

 浏览型号MAX877EPA的Datasheet PDF文件第2页浏览型号MAX877EPA的Datasheet PDF文件第3页浏览型号MAX877EPA的Datasheet PDF文件第4页浏览型号MAX877EPA的Datasheet PDF文件第5页浏览型号MAX877EPA的Datasheet PDF文件第6页浏览型号MAX877EPA的Datasheet PDF文件第7页 
19-0204; Rev 1; 5/94  
5 V/3 .3 V/3 V/Ad ju s t a b le -Ou t p u t ,  
S t e p -Up /S t e p -Do w n DC-DC Co n ve rt e rs  
/MAX879  
_______________Ge n e ra l De s c rip t io n  
____________________________Fe a t u re s  
♦ Regulates from Inputs Above & Below the Output  
♦ 1V to 6.2V Supply-Voltage Range  
The MAX877/MAX878/MAX879 are pulse-skipping, step-  
up/step-down DC-DC converters that provide a regulated  
output from inputs both above and below the output. They  
require only three external components—an inductor  
(typically 22µH) and two filter capacitors.  
♦ Internal 1A Active Rectifier with Input-to-Output  
Disconnect in Shutdown  
The MAX877 delivers a regulated 5V output from 2.5V to  
6.2V inputs. The MAX878 generates pin-selectable volt-  
ages of 3.0V or 3.3V from 1.5V to 6.2V inputs. The MAX879  
output can be adjusted from 2.5V to 6V via an external  
resistor divider from 2.5V to 6.2V inputs.  
♦ Up to 210mA Load Currents, Guaranteed  
♦ 85% Efficiency  
♦ Only 3 External Components  
♦ Adjustable Current Limit  
A unique high-power, internal, synchronous rectifier design  
(Active Rectifier™) enables the devices to regulate in a  
switched linear mode if the input voltage is higher than the  
desired output voltage. When the input voltage falls below  
the output voltage, the MAX877/MAX878/MAX879 will  
smoothly switch into a pulse-skipping boost mode and  
step up from input voltages as low as 1V. In shutdown, the  
active rectifier disconnects the output from the source. This  
stops the current drain from input to output associated with  
conventional step-up converters.  
♦ 195µA Quiescent Supply Current  
♦ 20µA Shutdown Supply Current  
♦ 3V/3.3V/5V and Adjustable Output Voltage Versions  
♦ Available in 8-Pin DIP and SO Packages  
______________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  
High-frequency operation (up to 300kHz) allows the use of  
small surface-mount inductors. Supply current is 195µA  
under no load, and only 20µA in shutdown mode. For 1-cell  
(1V) step-up converters with similar performance and the  
same pinout, refer to the MAX777/MAX778/MAX779 data  
sheet.  
MAX877CPA  
MAX877CSA  
MAX877C/D  
MAX877EPA  
MAX877ESA  
MAX877MJA  
0°C to +70°C  
0°C to +70°C  
Dice*  
-40°C to +85°C  
-40°C to +85°C  
-55°C to +125°C  
8 Plastic DIP  
8 SO  
________________________Ap p lic a t io n s  
Two or Three NiCd Cells to 3V/3.3V Conversion  
Three or Four Alkaline Cells to 5V Conversion  
One Lithium Cell to 3V/3.3V Conversion  
Pagers  
8 CERDIP  
Ordering Information continued on last page.  
* Contact factory for dice specifications.  
__________Typ ic a l Op e ra t in g Circ u it  
Palmtop and Notebook Computers  
Battery-Powered and Hand-Held Instruments  
INPUT  
1.8V TO 6.2V  
__________________P in Co n fig u ra t io n  
TOP VIEW  
2
22µF  
22µH  
IN  
5
6
1
7
*
MAX878  
ILIM  
SHDN  
LX  
ILIM  
IN  
1
2
3
4
8
7
6
5
N.C. (MAX877)  
OUTPUT  
3.3V  
SHDN  
210mA  
MAX877  
MAX878  
MAX879  
ON/OFF  
OUT  
AGND  
PGND  
OUT  
100µF  
LX  
SEL  
8
AGND  
3
PGND  
4
DIP/SO  
* SEL (MAX878), FB (MAX879)  
™ Active Rectifier is a trademark of Maxim Integrated Products.  
________________________________________________________________ Maxim Integrated Products  
1
Ca ll t o ll fre e 1 -8 0 0 -9 9 8 -8 8 0 0 fo r fre e s a m p le s o r lit e ra t u re .  
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中文翻译

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