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MIC2238-J4YMLTR

更新时间： 2024-09-28 15:46:47
品牌 Logo 应用领域
美国微芯 - MICROCHIP 开关光电二极管
页数 文件大小 规格书
15页 992K
描述
1.8A DUAL SWITCHING CONTROLLER, 2875kHz SWITCHING FREQ-MAX, PDSO12, 3 X 3 MM, LEAD FREE, MLF-12

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MIC2238-J4YMLTR 数据手册

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MIC2238  
2.5MHz Dual Phase  
PWM Buck Regulator  
General Description  
Features  
The Micrel MIC2238 is dual output 2-phase synchronous  
buck (step down) PWM DC/DC switching regulator. Power  
conversion efficiencies of above 95% are easily obtainable  
for a wide range of applications and loads. An ultra-low  
quiescent current of 28µA at light loads assures minimum  
current draw in battery powered applications that require  
standby modes. The 2.5MHz PWM operation of MIC2238  
allows the use of miniature 1µH, 2.2µH or 4.7µH inductor  
with the use of 2.2µF ceramic output capacitor.  
• Input voltage range: 2.5V to 5.5V  
• Dual output voltages running out of phase  
• 28µA quiescent current  
• Fixed output voltage versions  
• Adjustable version down to 0.8V  
• Low noise 2.5MHz PWM operation  
• 800mA output current capability for each channel  
• Stable with 2.2µH inductor, 2.2µF ceramic cap  
• Automatic switching into light load mode of operation  
• /FPWM pin allows low noise all-PWM mode operation  
The MIC2238 operates from 2.5V to 5.5V input and is  
available in fixed output voltage versions to save space  
and reduce external component count. The MIC2238-AA’s  
(adjustable version) output voltage versions can be  
programmed as low as 0.8V  
• Power good output with internal 5µA current source  
allows sequencing with programmable delay time  
For applications that require the lowest noise performance,  
the /FPWM pin allows the automatic Trickle mode to be  
disabled, remaining in full PWM mode. To maximize  
battery life in low-dropout conditions, MIC2238 can  
operate with a maximum duty cycle of 100%.  
• Internal soft-start  
• 1µA shutdown current  
• Built-in soft-start circuitry  
• Current limit protection  
• Pb-Free 3mm x 3mm MLF®-12L package  
The MIC2238 is available in a space-saving 3mm x 3mm  
MLF®-12L package with a 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.  
Applications  
• Cellular phones  
• PDAs  
• Digital Cameras  
• MP3 Players  
___________________________________________________________________________________________________________  
Typical Application  
MLF and MicroLead Frame 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  
M9999-042108  
April 2008  
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与MIC2238-J4YMLTR相关器件

型号 品牌 获取价格 描述 数据表
MIC2238-J4YML-TR MICROCHIP

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 		1.8A DUAL SWITCHING CONTROLLER, 2875kHz SWITCHING FREQ-MAX, PDSO12
MIC2238-S4YML MICREL

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 		2.5MHz Dual Phase PWM Buck Regulator
MIC2238-S4YMLTR MICREL

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 		1.8A DUAL SWITCHING CONTROLLER, 2875kHz SWITCHING FREQ-MAX, PDSO12, 3 X 3 MM, LEAD FREE, M
MIC2238-S4YMLTR MICROCHIP

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 		1.8A DUAL SWITCHING CONTROLLER, 2875kHz SWITCHING FREQ-MAX, PDSO12, 3 X 3 MM, LEAD FREE, M
MIC2238-S4YML-TR MICROCHIP

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 		1.8A DUAL SWITCHING CONTROLLER, 2875kHz SWITCHING FREQ-MAX, PDSO12
MIC2238-SSYML MICREL

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 		2.5MHz Dual Phase PWM Buck Regulator
MIC2238-SSYMLTR MICREL

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 		1.8A DUAL SWITCHING CONTROLLER, 2875kHz SWITCHING FREQ-MAX, PDSO12, 3 X 3 MM, GREEN, MLF-1
MIC2238-SSYMLTR MICROCHIP

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 		1.8A DUAL SWITCHING CONTROLLER, 2875kHz SWITCHING FREQ-MAX, PDSO12, 3 X 3 MM, GREEN, MLF-1
MIC2238-SSYML-TR MICROCHIP

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 		1.8A DUAL SWITCHING CONTROLLER, 2875kHz SWITCHING FREQ-MAX, PDSO12
MIC22400 MICREL

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 		4A Integrated Switch Synchronous Buck Regulator with Frequency Programmable up to 4MHz

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