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MIC23250-S4YMT

更新时间： 2024-11-10 10:57:19
品牌 Logo 应用领域
麦瑞 - MICREL 稳压器
页数 文件大小 规格书
20页 960K
描述
4MHz Dual 400mA Synchronous Buck Regulator with HyperLight Load

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MIC23250-S4YMT 数据手册

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MIC23250  
4MHz Dual 400mA Synchronous Buck  
Regulator with HyperLight Load™  
General Description  
Features  
The MIC23250 is a high efficiency 4MHz dual 400mA  
synchronous buck regulator with HyperLight Load™ mode.  
HyperLight 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 fixed output MIC23250 has  
a tiny 2mm x 2mm Thin MLF® package that saves  
precious board space by requiring only 6 additional  
external components to drive both outputs up to 400mA  
each.  
• Input voltage: 2.7V to 5.5V  
• Dual output current 400mA/400mA  
• Up to 94% peak efficiency and 85% efficiency at 1mA  
• 33µA dual quiescent current  
• 1µH inductor with a 4.7µF capacitor  
• 4MHz in PWM operation  
• Ultra fast transient response  
HyperLight Load™  
• Low voltage output ripple  
• 20mVpp in HyperLight Load™ mode  
• 3mV output voltage ripple in full PWM mode  
• 0.01µA shutdown current  
• Fixed output:10-pin 2mm x 2mm Thin MLF®  
• Adjustable output:12-pin 2.5mm x 2.5mm Thin MLF®  
• –40°C to +125°C junction temperature range  
The device is designed for use with a 1µH inductor and a  
4.7µF output capacitor that enables a sub-1mm height.  
The MIC23250 has a very low quiescent current of 33µA  
with both outputs enabled and can achieve over 85%  
efficiency at 1mA. At higher loads the MIC23250 provides a  
constant switching frequency around 4MHz while providing  
peak efficiencies up to 94%.  
Applications  
• Mobile handsets  
• Portable media players  
• Portable navigation devices (GPS)  
• WiFi/WiMax/WiBro modules  
• Digital cameras  
The MIC23250 fixed output voltage option is available in a  
10-pin 2mm x 2mm Thin MLF®. The adjustable output  
options is available in a 12-pin 2.5mm x 2.5mm Thin MLF®.  
The MIC23250 is designed to operate over the junction  
operating range from –40°C to +125°C.  
• Wireless LAN cards  
• USB Powered Devices  
Data sheets and support documentation can be found on  
Micrel’s web site at: www.micrel.com.  
____________________________________________________________________________________________________________  
Typical Application  
Efficiency V  
= 1.8V  
OUT  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
VIN = 3.0V  
VIN = 2.7V  
VIN = 4.2V  
VIN = 3.6V  
L = 1µH  
= 4.7µF  
C
OUT  
11  
0
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  
M9999-061110-E  
June 2010  
1234567...20

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