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MIC2169YMMTR

更新时间： 2024-09-17 13:11:31
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麦瑞 - MICREL /
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14页 160K
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MIC2169YMMTR 数据手册

 浏览型号MIC2169YMMTR的Datasheet PDF文件第2页浏览型号MIC2169YMMTR的Datasheet PDF文件第3页浏览型号MIC2169YMMTR的Datasheet PDF文件第4页浏览型号MIC2169YMMTR的Datasheet PDF文件第5页浏览型号MIC2169YMMTR的Datasheet PDF文件第6页浏览型号MIC2169YMMTR的Datasheet PDF文件第7页 
MIC2169  
500kHz PWM Synchronous Buck Control IC  
General Description  
Features  
The MIC2169 is a high-efficiency, simple to use 500kHz  
PWM synchronous buck control IC housed in a small MSOP-  
10 package. The MIC2169 allows compact DC/DC solutions  
with a minimal external component count and cost.  
• 3V to 14.5V input voltage range  
• Adjustable output voltage down to 0.8V  
• Up to 95% efficiency  
• 500kHz PWM operation  
• Adjustable current limit senses high-side N-Channel  
MOSFET current  
• No external current-sense resistor  
• Adaptive gate drive increases efficiency  
• Ultra-fast response with hysteretic transient recovery  
mode  
• Overvoltage protection protects the load in fault  
conditions  
• Dual mode current limit speeds up recovery time  
• Hiccup mode short-circuit protection  
• Internal soft-start  
The MIC2169 operates from a 3V to 14.5V input, without the  
need of any additional bias voltage. The output voltage can  
be precisely regulated down to 0.8V. The adaptive all  
N-Channel MOSFET drive scheme allows efficiencies over  
95% across a wide load range.  
The MIC2169 senses current across the high-side N-Chan-  
nel MOSFET, eliminating the need for an expensive and  
lossy current-sense resistor. Current limit accuracy is main-  
tained by a positive temperature coefficient that tracks the  
increasing R  
of the external MOSFET. Further cost  
DS(ON)  
and space are saved by the internal in-rush-current limiting  
digital soft-start.  
• Dual function COMP and EN pin allows low-power  
shutdown  
• Small size MSOP 10-lead package  
The MIC2169 is available in a 10-pin MSOP package, with a  
wide junction operating range of –40°C to +125°C.  
Applications  
• Point-of-load DC/DC conversion  
• Set-top boxes  
All support documentation can be found on Micrel’s web  
site at www.micrel.com.  
• Graphic cards  
• LCD power supplies  
• Telecom power supplies  
• Networking power supplies  
• Cable modems and routers  
Typical Application  
VIN = 5V  
SD103BWS  
MIC2169 Efficiency  
100µF  
100  
95  
90  
85  
80  
75  
70  
4.7µF  
0.1µF  
1kΩ  
VDD  
BST  
CS  
IRF7821  
2.5µH  
VIN  
HSD  
VSW  
65  
MIC2169  
3.3V  
VIN = 5V  
60  
55  
50  
V
OUT = 3.3V  
COMP/EN  
10kΩ  
IRF7821  
LSD  
FB  
150pF  
100nF  
0
2
4
6
I
8
10 12 14 16  
(A)  
150µF x 2  
LOAD  
GND  
4kΩ  
3.24kΩ  
MIC2169 Adjustable Output 500kHz Converter  
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com  
M9999-111803  
November 2003  
1
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MIC2169YMMTR 替代型号

型号 品牌 替代类型 描述 数据表
MIC2169BMM MICREL

完全替代

 500kHz PWM Synchronous Buck Control IC
MIC2169YMM MICREL

完全替代

 500kHz PWM Synchronous Buck Control IC

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