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MIC5245-3.3YM5-TR

更新时间： 2024-11-09 22:38:15
品牌 Logo 应用领域
美国微芯 - MICROCHIP /
页数 文件大小 规格书
12页 126K
描述
IC REG LINEAR 3.3V 150MA SOT23-5

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MIC5245  
150mA µCap CMOS LDO Regulator  
Final Information  
General Description  
Features  
The MIC5245 is an efficient, precise CMOS voltage regulator  
optimized for ultra-low-noise applications. The MIC5245 of-  
fers better than 1% initial accuracy, extremely low dropout  
voltage (typically 150mV at 150mA) and constant ground  
current over load (typically 100µA). The MIC5245 provides a  
very low noise output, ideal for RF applications where quiet  
voltage sources are required. A noise bypass pin is also  
available for further reduction of output noise.  
• Ultralow dropout—100mV @ 100mA  
• Ultralow noise—30µV(rms)  
• Stability with tantalum or ceramic capacitors  
• Load independent, ultralow ground current  
• 150mA output current  
• Current limiting  
• Thermal Shutdown  
• Tight load and line regulation  
• “Zero” off-mode current  
• Fast transient response  
Designed specifically for hand-held and battery-powered  
devices, the MIC5245 provides a TTL logic compatible en-  
able pin. When disabled, power consumption drops nearly to  
zero.  
• TTL-Logic-controlled enable input  
Applications  
• Cellular phones and pagers  
• Cellular accessories  
• Battery-powered equipment  
The MIC5245 also works with low-ESR ceramic capacitors,  
reducing the amount of board space necessary for power  
applications, critical in hand-held wireless devices.  
Key features include current limit, thermal shutdown, a push-  
pull output for faster transient response, and an active clamp  
tospeedupdeviceturnoff.AvailableintheIttyBitty™SOT-23-5  
and power MSO-8 packages, the MIC5245 also offers a  
range of fixed output voltages.  
• Laptop, notebook, and palmtop computers  
• PCMCIA V and V regulation/switching  
• Consumer/personal electronics  
• SMPS post-regulator/dc-to-dc modules  
• High-efficiency linear power supplies  
CC  
PP  
Not recommended for new designs, see MIC5255.  
Ordering Information  
Part Number  
Marking Voltage  
Junction Temp. Range  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
Package  
MIC5245-2.5BM5  
MIC5245-2.7BM5  
MIC5245-2.8BM5  
MIC5245-2.85BM5  
MIC5245-3.0BM5  
MIC5245-3.1BM5  
MIC5245-3.2BM5  
MIC5245-3.3BM5  
MIC5245-3.3BMM  
LS25  
LS27  
LS28  
LS2J  
LS30  
LS31  
LS32  
LS33  
—
2.5V  
2.7V  
2.8V  
2.85V  
3.0V  
3.1V  
3.2V  
3.3V  
3.3V  
SOT-23-5  
SOT-23-5  
SOT-23-5  
SOT-23-5  
SOT-23-5  
SOT-23-5  
SOT-23-5  
SOT-23-5  
MSOP-8  
Other voltages available. Contact Micrel for details.  
Typical Application  
MIC5245-3.3MM  
ENABLE  
SHUTDOWN  
1
2
3
4
8
7
6
5
MIC5245-x.xBM5  
VIN  
VOUT  
COUT  
1
5
VIN  
2
VOUT  
3
4
Enable  
Shutdown  
EN  
EN (pin 3) may be  
connected directly  
o IN (pin 1).  
CBYP  
(optional)  
CBYP  
(OPTIONAL)  
COUT  
Ultra-Low-Noise Regulator Application  
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com  
August 2002  
1
MIC5245  
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