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MIC4720BML PDF预览

MIC4720BML

更新时间: 2024-10-28 04:22:47
品牌 Logo 应用领域
麦瑞 - MICREL 稳压器开关
页数 文件大小 规格书
21页 1062K
描述
3mm x 3mm 2.0MHz 2A Integrated Switch Buck Regulator

MIC4720BML 数据手册

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MIC4720  
3mm x 3mm 2.0MHz 2A Integrated  
Switch Buck Regulator  
General Description  
Features  
The Micrel MIC4720 is a high efficiency PWM buck (step-  
down) regulator that provides up to 2A of output current.  
The MIC4720 operates at 2.0MHz and has proprietary  
internal compensation that allows a closed loop bandwidth  
of over 200KHz.  
2.7 to 5.5V supply voltage  
2.0MHz PWM mode  
Output current to 2A  
Up to 94% efficiency  
100% maximum duty cycle  
Adjustable output voltage option down to 1V  
Ultra-fast transient response  
Ultra-small external components  
Stable with a 1µH inductor and a 4.7µF output  
capacitor  
Fully integrated 2A MOSFET switch  
Micropower shutdown  
The low on-resistance internal p-channel MOSFET of the  
MIC4720 allows efficiencies over 92%, reduces external  
components count and eliminates the need for an  
expensive current sense resistor.  
The MIC4720 operates from 2.7V to 5.5V input and the  
output can be adjusted down to 1V. The devices can  
operate with a maximum duty cycle of 100% for use in low-  
dropout conditions.  
Thermal shutdown and current limit protection  
Pb-free 12-pin 3mm x 3mm MLF® package  
–40°C to +125°C junction temperature range  
Pb-free 10-pin ePad MSOP package  
The MIC4720 is available in the exposed pad 12-pin  
3mm x 3mm MLF® and 10-pin ePad MSOP package with a  
junction operating range from –40°C to +125°C.  
Applications  
FPGA/DSP/ASIC applications  
General point of load  
Broadband communications  
DVD/TV recorder  
Point of Sale  
Printers/Scanners  
Set Top Boxes  
Computing Peripherals  
Video Cards  
Typical Application  
MIC4720  
3.3VOUT Efficiency  
100  
95  
90  
85  
80  
75  
70  
65  
VIN = 4.5V  
MIC4720  
VIN = 5.0V  
VIN = 5.5V  
OUTPUT CURRENT (A)  
2A 2.0MHz Buck Regulator  
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  
M9999-051707  
May 2007  

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