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MIC23031-AYMT

更新时间： 2024-11-14 03:20:03
品牌 Logo 应用领域
麦瑞 - MICREL 稳压器
页数 文件大小 规格书
17页 3947K
描述
4MHz PWM 400mA Buck Regulator with Hyper Light Load⑩

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MIC23031-AYMT 数据手册

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MIC23031  
4MHz PWM 400mA Buck Regulator  
with Hyper Light Load™  
General Description  
Features  
• Input voltage range: 2.7V to 5.5V  
• 400mA output current  
The MIC23031 is a high efficiency 4MHz 400mA  
synchronous buck regulator with Hyper Light Load™  
mode. Hyper Light Load™ provides very high efficiency at  
light loads and ultra-fast transient response which is  
perfectly suited for supplying processor core voltages. An  
additional benefit of this proprietary architecture is very low  
output ripple voltage throughout the entire load range with  
the use of small output capacitors. The tiny 1.6mm x  
1.6mm Thin MLF® package saves precious board space  
and requires only three external components.  
• Up to 93% efficiency and 88% at 1mA  
• 21µA typical quiescent current  
• 4MHz PWM operation in continuous mode  
• Ultra fast transient response  
• Low voltage output ripple  
o 20mVpp ripple in Hyper Light LoadTM mode  
o 3mV output voltage ripple in full PWM mode  
• Fully integrated MOSFET switches  
The MIC23031 is designed for use with a very small  
inductor, down to 0.47µH, and an output capacitor as small  
as 2.2 µF that enables a sub-1mm height.  
• 0.01µA shutdown current  
• Thermal shutdown and current limit protection  
• Fixed and adjustable output voltage options available  
• 6-pin 1.6mm x 1.6mm Thin MLF®  
The MIC23031 has a very low quiescent current of 21µA  
and achieves as high as 88% efficiency at 1mA. At higher  
loads, the MIC23031 provides a constant switching  
frequency around 4MHz while achieving peak efficiencies  
up to 93%.  
• –40°C to +125°C junction temperature range  
Applications  
The MIC23031 is available in a 6-pin 1.6mm x 1.6mm Thin  
MLF® package with an operating junction temperature  
range from –40°C to +125°C.  
Data sheets and support documentation can be found on  
Micrel’s web site at: www.micrel.com.  
• Mobile handsets  
• Portable media/MP3 players  
• Portable navigation devices (GPS)  
• WiFi/WiMax/WiBro modules  
• Digital Cameras  
• Wireless LAN cards  
• USB powered devices  
• Portable applications  
Typical Application  
Efficiency VOUT = 2.5V  
U1 - MIC23031  
L1  
100  
= 3.0V  
VIN  
EN  
VOUT  
C2  
90  
VIN  
SW  
= 3.6V  
C1  
80  
= 4.2V  
SNS  
EN  
70  
AGND  
PGND  
L
60  
GND  
GND  
50  
1
10  
100  
1000  
OUTPUT CURRENT (mA)  
Hyper Light Load is a trademark of Micrel, Inc  
MLF and MicroLead Frame are registered trademark 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  
M9999-051608-A  
May 2008  
1234567...17

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