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MIC2186_05 PDF预览

MIC2186_05

更新时间: 2024-02-20 07:53:53
品牌 Logo 应用领域
麦瑞 - MICREL /
页数 文件大小 规格书
15页 189K
描述
Low Voltage PWM Control IC

MIC2186_05 数据手册

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MIC2186  
Micrel, Inc.  
MIC2186  
Low Voltage PWM Control IC  
General Description  
Features  
Micrel’s MIC2186 is a high efficiency boost PWM control IC.  
With its wide input voltage range of 2.9V to 14V, the MIC2186  
can be used to efficiently boost voltages in 1- or 2-cell Li Ion  
battery powered applications, as well as to boost voltages in  
fixed 3.3V, 5V, or 12V systems. Its powerful 1.6output  
driverallowstheMIC2186tosupplylargeoutputcurrentswith  
the selection of proper external MOSFETs.  
• Input voltage range: 2.9V to 14V  
• 1.6output driver  
• Oscillator frequency of 100kHz/200kHz/400kHz  
• Frequency sync to 600kHz  
• Front edge blanking  
• PWM Current Mode Control  
• Selectable light load SKIP mode  
• 600µA quiescent current (SKIP-Mode)  
• 0.5µA shutdown current  
The MIC2186 can be configured to operate at 100kHz,  
200kHz, or 400kHz. With it’s fixed frequency PWM architec-  
ture, and easily synchronized drive, the MIC2186 is ideal for  
noise-sensitive telecommunications applications.  
• Cycle-by-Cycle current limiting  
• Frequency foldback protection  
• Adjustable under-voltage lockout  
• Precision 1.245V reference output  
• 16 pin SOIC and QSOP package options  
• Selectable 50% maximum duty cycle for flyback applica-  
tions  
MIC2186 also features a low current shutdown mode of  
0.5µA and programmable undervoltage lockout. A manually  
selectable SKIP Mode allows high efficiencies in light load  
situations.  
TheMIC2186isavailablein16pinSOICandQSOPpackage  
Applications  
options with an operating range from –40°C to 125°C.  
• DC power distribution systems  
• Wireless Modems  
• ADSL line cards  
• SLIC power supplies  
• 1-and 2-cell Li Ion battery operated equipment  
Ordering Information  
Part Number  
Ambient  
Standard  
Pb-Free  
MIC2186YM  
MIC2186YQS  
Frequency (kHz)  
100 / 200 / 400  
100 / 200 / 400  
Voltage  
Adj  
Adj  
Temp. Range  
–40°C to +125°C  
–40°C to +125°C  
Package  
16-lead SOP  
16-lead QSOP  
MIC2186BM  
MIC2186BQS  
Typical Application  
MBR2535CT  
2.2µH  
VIN = 3.3V  
VOUT = 12V  
CIN  
120µF  
20V  
1
VINA  
EN/UVLO  
HIDC  
FREQ/2  
VDD  
COMP  
VREF  
SKIP  
12V Output Efficiency  
7
13  
15  
10  
4
COUT  
95  
90  
85  
80  
75  
70  
65  
60  
16  
6
VINP  
FB  
150µF(x2)  
20V  
MIC2186  
Si4404DY  
(x2)  
14  
9
OUTN  
CSH  
8
2
4.5m  
11  
12  
SYNC  
PGND  
SS  
SGND  
VIN = 3.3V  
3
5
0
0.5  
1
1.5  
2
2.5  
3
OUTPUT CURRENT (A)  
Adjustable Output Boost Converter  
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com  
M9999-042205  
April 2005  
1

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