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MIC2285A

更新时间： 2024-01-19 12:07:11
品牌 Logo 应用领域
麦瑞 - MICREL 稳压器
页数 文件大小 规格书
14页 547K
描述
8MHz PWM Synchronous Buck Regulator with LDO Standby Mode

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MIC2285A 技术参数

是否Rohs认证： 符合生命周期：Active
包装说明：3 X 3 MM, LEAD FREE, MLF-10Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：1.04其他特性：PFM TECHNIQUE ALSO POSSIBLE; IT ALSO HAS ADJUSTABLE OUTPUT VOLTAGE DOWN TO 1 V
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制技术：PULSE WIDTH MODULATION
最大输入电压：5.5 V最小输入电压：2.7 V
标称输入电压：3.6 VJESD-30 代码：S-PDSO-N10
JESD-609代码：e4长度：3 mm
湿度敏感等级：1功能数量：1
端子数量：10最高工作温度：125 °C
最低工作温度：-40 °C最大输出电流：2 A
封装主体材料：PLASTIC/EPOXY封装代码：HVSON
封装形状：SQUARE封装形式：SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：1 mm表面贴装：YES
切换器配置：BUCK最大切换频率：8800 kHz
温度等级：AUTOMOTIVE端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：NO LEAD端子节距：0.5 mm
端子位置：DUAL处于峰值回流温度下的最长时间：40
宽度：3 mm

MIC2285A 数据手册

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MIC2285A  
8MHz PWM Synchronous Buck Regulator  
with LDO Standby Mode  
General Description  
Features  
The Micrel MIC2285A is a high efficiency 8MHz  
PWM synchronous buck (step-down) regulator that  
features a LOWQ® LDO standby mode that draws  
only 20µA of quiescent current. The MIC2285A  
allows an ultra-low noise, small size, and high  
efficiency solution for portable power applications.  
• 2.7 to 5.5V supply/input voltage  
• Light load LOWQ® LDO mode  
–
–
20µA quiescent current  
Low noise, 75µVrms  
• 8MHz PWM mode  
–
–
–
Output current to 600mA  
>90% efficiency  
100% maximum duty cycle  
In PWM mode, the MIC2285A operates with a  
constant frequency 8MHz PWM control. Under light  
load conditions, such as in system sleep or standby  
modes, the PWM switching operation can be  
disabled to reduce switching losses. In this light load  
LOWQ® mode, the LDO maintains the output voltage  
and draws only 18µA of quiescent current. The LDO  
mode of operation saves battery life while not  
introducing spurious noise and high ripple as  
experienced with pulse skipping or bursting mode  
regulators.  
• Adjustable output voltage option down to 1V  
Fixed output voltage options available  
–
• Ultra-fast transient response  
• Requires only a 0.47µH inductor  
• Enables sub 0.55mm profile solution  
• Fully integrated MOSFET switches  
• Micropower shutdown  
• Thermal shutdown and current limit protection  
• 10-pin 2mm x 2mm x 0.55mm MLF® package  
• –40°C to +125°C junction temperature range  
The MIC2285A operates from 2.7V to 5.5V input and  
features internal power MOSFETs that can supply  
up to 600mA output current in PWM mode. It can  
operate with a maximum duty cycle of 100% for use  
in low-dropout conditions.  
The MIC2285A is available in the 10-pin 2mm x  
2mm Thin MLF® package with a junction operating  
range from –40°C to +125°C.  
Data sheets and support documentation can be  
found on Micrel’s web site at: www.micrel.com.  
Applications  
• Cellular phones  
• PDAs  
• USB peripherals  
____________________________________________________________________________________________________  
Typical Application  
2.5V  
Efficiency  
OUT  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
V
=3.2V  
=3.6V  
=4.2V  
IN  
V
IN  
V
IN  
Adjustable Output Buck Regulator with LOWQ® Mode  
0
100 200 300 400 500 600  
OUTPUT CURRENT (mA)  
LOWQ is a registered 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  
M9999-083107-B  
August 2007  
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