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MIC2185BQS

更新时间： 2024-02-02 12:03:54
品牌 Logo 应用领域
麦瑞 - MICREL 开关光电二极管信息通信管理
页数 文件大小 规格书
15页 135K
描述
Low Voltage Synchronous Boost PWM Control IC

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中文翻译

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MIC2185BQS 数据手册

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MIC2185  
Low Voltage Synchronous Boost PWM Control IC  
Final Information  
General Description  
Features  
Micrel’s MIC2185 is a high efficiency synchronous boost  
PWM control IC. With its wide input voltage range of 2.9V to  
14V, the MIC2185 can be used to efficiently boost voltages in  
1- or 2-cell Li Ion battery powered applications, as well as  
fixed 3.3V and 5V systems. Its powerful 5Ω output drivers  
allow the MIC2185 to supply large output currents with the  
selection of the proper external MOSFETs.  
• Input voltage range: 2.9V to 14V  
• 95% efficiency  
• Oscillator frequency of 200kHz/400kHz  
• Frequency sync to 600kHz  
• 0.5µA shutdown current  
• Two 5Ω output drivers  
• Front edge blanking  
• PWM Current Mode Control  
• Cycle-by-Cycle current limiting  
• Frequency foldback protection  
• Adjustable under-voltage lockout  
• Precision 1.245V reference output  
• 16 pin SOIC narrow body package and 16 pin QSOP  
package  
With it’s fixed frequency PWM architecture, and easily syn-  
chronized drive, the MIC2185 is ideal for noise-sensitive  
telecommunicationsapplications. Thenominal400kHzoper-  
ating frequency of the MIC2185 can be divided by two,  
allowing the device to be externally synchronized to frequen-  
cies below 400kHz.  
TheMIC2185alsofeaturesalowcurrentshutdownmodeand  
aprogrammableundervoltagelockout.Askippedpulsemode  
of operation can be manually set to achieve higher efficien-  
cies at light load conditions.  
Applications  
• 3.3V to 5V conversion in telecom systems  
• Satellite Phones  
The MIC2185 is available in a 16 pin SOIC package and 16  
pin QSOP package with an ambient temperature operating  
range from –40°C to 85°C.  
• Cable Modems  
• 1-and 2-cell Li Ion battery operated equipment  
Ordering Information  
Part Number  
MIC2185BM  
MIC2185BQS  
Frequency Voltage  
Junction Temp. Range  
–40°C to +125°C  
Package  
200/400kHz  
200/400kHz  
Adj  
Adj  
16-lead SOP  
16-lead QSOP  
–40°C to +125°C  
Typical Application  
2.4µH  
VIN = 3.3V  
Si9803DY (x2)  
VOUT = 5V  
CIN  
1
14  
VINA  
OUTP  
COUT  
7
16  
EN/UVLO  
VINP  
5V Output Efficiency  
100  
95  
90  
85  
80  
75  
70  
15  
10  
4
6
FREQ/2  
VDD  
FB  
Si4884DY (x2)  
MIC2185  
13  
9
COMP  
VREF  
SYNC  
SKIP  
OUTN  
CSH  
8
11  
8mΩ  
2
12  
PGND  
VIN = 3.3V  
200kHz PWM  
SS  
3
SGND  
5
0
1
2
3
4
5
OUTPUT CURRENT (A)  
Adjustable Output Synchronous Boost 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  
May 2002  
1
MIC2185  
1234567...15

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MIC2185BQS 替代型号

型号 品牌 替代类型 描述 数据表
MIC2185YQSTR MICREL

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 SWITCHING CONTROLLER, 440kHz SWITCHING FREQ-MAX, PDSO16, LEAD FREE, QSOP-16

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