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MIC5255-2.8YML PDF预览

MIC5255-2.8YML

更新时间: 2024-11-25 22:25:15
品牌 Logo 应用领域
麦瑞 - MICREL 调节器光电二极管输出元件
页数 文件大小 规格书
11页 131K
描述
150mA Low Noise UCap CMOS LDO

MIC5255-2.8YML 数据手册

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MIC5255  
150mA Low Noise µCap CMOS LDO  
General Description  
Features  
The MIC5255 is an efficient, precise CMOS voltage regulator  
optimized for ultra-low-noise applications. It offers 1% initial  
accuracy, extremely-low dropout voltage (135mV at 150mA)  
and low ground current (typically 90µA). The MIC5255 pro-  
vides a very-low-noise output, ideal for RF applications  
where a clean voltage source is required. A noise bypass pin  
is also available for further reduction of output noise.  
• Input voltage range: 2.7V to 6.0V  
• Thin SOT package: 1mm height SOT-23-5  
• Ultra-low output noise: 30µV(rms)  
• Stability with ceramic output capacitors  
• Ultra-low dropout: 135mV @ 150mA  
• High output accuracy:  
1.0% initial accuracy  
2.0% over temperature  
Designed specifically for handheld and battery-powered de-  
vices, the MIC5255 provides a TTL-logic-compatible enable  
pin.Whendisabled,powerconsumptiondropsnearlytozero.  
• Low quiescent current: 90µA  
• Tight load and line regulation  
• TTL-Logic-controlled enable input  
• “Zero” off-mode current  
The MIC5255 also works with low-ESR ceramic capacitors,  
reducing the amount of board space necessary for power  
applications, critical in handheld wireless devices.  
• Thermal shutdown and current limit protection  
Key features include current limit, thermal shutdown, faster  
transient response, and an active clamp to speed up device  
turn-off. Available in the 6-pin 2mm × 2mm MLF™ package,  
the IttyBitty® SOT-23-5 package and the new Thin SOT-23-  
5, which offers the same footprint as the standard IttyBitty®  
SOT-23-5, but only 1mm tall. The MIC5255 offers a range of  
output voltages.  
Applications  
• Cellular phones and pagers  
• Cellular accessories  
• Battery-powered equipment  
• Laptop, notebook, and palmtop computers  
• Consumer/personal electronics  
All support documentation can be found on Micrel’s web  
site at www.micrel.com.  
Typical Application  
MIC5255-x.xBM5  
VOUT  
VIN  
VIN  
VOUT  
C
IN = 1.0µF  
Ceramic  
1
2
3
5
MIC5255-x.xBML  
ENABLE  
SHUTDOWN  
COUT  
6
5
4
1
2
3
EN  
CBYP  
(optional)  
COUT = 1.0µF  
Ceramic  
4
Enable  
Shutdown  
EN  
EN (pin 3) may be  
connected directly  
to IN (pin 1).  
C
BYP = 0.01µF  
Ultra-Low-Noise Regulator Application  
IttyBitty is a registered trademark of Micrel, Inc.  
MicroLeadFrame and MLF are trademarks of Amkor Technology.  
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000• http://www.micrel.com  
M0385-080204  
August, 2004  
1

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