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MIC94345-GYCSTR PDF预览

MIC94345-GYCSTR

更新时间: 2024-11-08 06:53:19
品牌 Logo 应用领域
美国微芯 - MICROCHIP /
页数 文件大小 规格书
16页 500K
描述
Regulator, 1 Output, 1.8V1, CMOS, PBGA6

MIC94345-GYCSTR 数据手册

 浏览型号MIC94345-GYCSTR的Datasheet PDF文件第2页浏览型号MIC94345-GYCSTR的Datasheet PDF文件第3页浏览型号MIC94345-GYCSTR的Datasheet PDF文件第4页浏览型号MIC94345-GYCSTR的Datasheet PDF文件第5页浏览型号MIC94345-GYCSTR的Datasheet PDF文件第6页浏览型号MIC94345-GYCSTR的Datasheet PDF文件第7页 
MIC94325/45/55  
500mA LDO with  
Ripple BlockerTechnology  
General Description  
Features  
The MIC943x5 Ripple Blockeris a monolithic integrated  
circuit that provides low-frequency ripple attenuation  
(switching noise rejection) to a regulated output voltage.  
This is important for applications where a DC/DC switching  
converter is required to lower or raise a battery voltage but  
where switching noise cannot be tolerated by sensitive  
downstream circuits such as in RF applications. The  
MIC943x5 maintains high power supply ripple rejection  
(PSRR) with input voltages operating near the output  
voltage level to improve overall system efficiency. A low-  
voltage logic enable pin facilitates ON/OFF control at  
typical GPIO voltage levels.  
1.8V to 3.6V input voltage range  
Active noise rejection over a wide frequency band  
>50dB from 10Hz to 5MHz at 500mA load  
Rated to 500mA output current  
Fixed and adjustable output voltages  
Optional output auto-discharge when disabled  
Current-limit and thermal-limit protected  
Ultra-small 0.84mm x 1.32mm 6-ball CSP  
1.6mm x 1.6mm, 6-pin Thin DFN  
Logic-controlled enable pin  
The MIC943x5 operates from an input voltage of 1.8V to  
3.6V. The MIC943x5 options include fixed (MIC94345/55)  
or adjustable (MIC94325) output voltages. The MIC94355  
version offers an auto-discharge to discharge the output  
capacitor when the part is disabled.  
 40C to +125C junction temperature range  
Applications  
Smart phones  
Packaged in a 0.84mm x 1.32mm 6-ball CSP or a 6-pin  
1.6mm x 1.6mm Thin DFN, the MIC943x5 has a junction  
operating temperature range of –40C to +125C.  
Data sheets and support documentation can be found on  
Micrel’s web site at: www.micrel.com.  
Tablet PC/notebooks and webcams  
Digital still and video cameras  
Global positioning systems  
Mobile computing  
Automotive and industrial applications  
_________________________________________________________________________________________________  
Typical Application  
MIC94355 PSRR  
COUT = 4.7µF  
0
VIN = 2.8V + 40mVpp  
-20  
-40  
V
OUT = 1.8V  
C
OUT = 4.7µF  
500mA  
-60  
10mA  
-80  
-100  
-120  
200mA  
10  
100  
1K10K100K1M10M,  
0
00  
000  
FREQUENCY (Hz)  
Ripple Blocker is a trademark of Micrel, Inc  
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com  
M9999-102512-A  
October 2012  

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