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MIC33050-CYHL

更新时间： 2024-11-20 10:57:07
品牌 Logo 应用领域
麦瑞 - MICREL 稳压器
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13页 627K
描述
4MHz Internal Inductor PWM Buck Regulator with HyperLight Load

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MIC33050-CYHL 数据手册

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MIC33050  
4MHz Internal Inductor PWM Buck  
Regulator with HyperLight Load™  
General Description  
Features  
The Micrel MIC33050 is a high efficiency 600mA PWM  
synchronous buck (step-down) regulator with internal  
inductor featuring HyperLight Load™, a patent-pending  
switching scheme that offers best-in-class light load  
efficiency and transient performance while providing very  
small external components and low output ripple at all  
loads.  
• Input voltage: 2.7V to 5.5V  
• 600mA output current  
• Fixed output voltage options from 0.72V to 3.3V  
• No external inductor required  
HyperLight Load™  
• Ultra fast transient response  
• 20µA typical quiescent current  
• 4MHz in PWM in constant current mode  
• Low voltage output ripple  
The MIC33050 also has a very low typical quiescent  
current draw of 20µA and can achieve over 85% efficiency  
even at 1mA.  
–
25mVpp in HyperLight Load™ mode  
–
3mV output voltage ripple in full PWM mode  
In contrast to traditional light load schemes, the HyperLight  
Load™ architecture does need not trade off control speed  
to obtain low standby currents and in doing so, the device  
only needs a small output capacitor to absorb the load  
transient as the powered device goes from light load to full  
load.  
• >93% efficiency  
• >85% at 1mA  
• Micropower shutdown  
• 3mm x 3mm MLF®-12L  
• –40°C to +125°C junction temperature range  
At higher loads, the MIC33050 provides a constant  
switching frequency of greater than 4MHz while providing  
peak efficiencies greater than 93%.  
Applications  
The MIC33050 comes in fixed output voltage options from  
0.72V to 3.3V thereby eliminating external feedback  
components.  
• Cellular phones  
• Digital cameras  
• Portable media players  
• Wireless LAN cards  
• WiFi/WiMax/WiBro modules  
• USB Powered Devices  
The MIC33050 is available in an 12-pin 3mm x 3mm MLF®  
with a junction operating range of –40°C to +125°C.  
Data sheets and support documentation can be found on  
Micrel’s web site at: www.micrel.com.  
____________________________________________________________________________________________________________  
Typical Application  
Efficiency VOUT = 1.8V  
100  
VIN = 3.0V  
90  
80  
70  
60  
50  
VIN = 4.2V  
VIN = 3.6V  
1
10  
100  
1000  
OUTPUT CURRENT (mA)  
HyperLight Load is a trademark of Micrel, Inc.  
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, 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  
M9999-070909-C  
July 2009  
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