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MIC4685-3.3BR PDF预览

MIC4685-3.3BR

更新时间: 2024-11-19 14:53:35
品牌 Logo 应用领域
美国微芯 - MICROCHIP 开关
页数 文件大小 规格书
17页 332K
描述
Switching Regulator, Voltage-mode, 1A, 225kHz Switching Freq-Max, PSSO7, SPAK-7

MIC4685-3.3BR 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:MODULE包装说明:SPAK-7
针数:7Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.6模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:VOLTAGE-MODE控制技术:PULSE WIDTH MODULATION
最大输入电压:30 V最小输入电压:4 V
标称输入电压:12 VJESD-30 代码:R-PSSO-G7
JESD-609代码:e0长度:9.395 mm
湿度敏感等级:3功能数量:1
端子数量:7最高工作温度:125 °C
最低工作温度:-40 °C最大输出电流:1 A
封装主体材料:PLASTIC/EPOXY封装等效代码:SMSIP7H,.4,50TB
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):240认证状态:Not Qualified
座面最大高度:2.16 mm子类别:Switching Regulator or Controllers
表面贴装:YES切换器配置:BUCK
最大切换频率:225 kHz温度等级:AUTOMOTIVE
端子面层:Tin/Lead (Sn80Pb20)端子形式:GULL WING
端子节距:1.27 mm端子位置:SINGLE
处于峰值回流温度下的最长时间:30宽度:8 mm
Base Number Matches:1

MIC4685-3.3BR 数据手册

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MIC4685  
3A SPAK SuperSwitcher™  
Buck Regulator  
General Description  
Features  
The MIC4685 is a high-efficiency 200kHz stepdown (buck)  
switching regulator. Power conversion efficiency of above  
85% is easily obtainable for a wide variety of applications.  
The MIC4685 achieves 3A of continuous current in the  
7-pin SPAK package.  
Low 2mm prole SPAK package  
3A continuous output current  
Wide 4V to 30V input voltage range (34V transient)  
Fixed 200kHz PWM operation  
Over 85% efciency  
Output voltage adjustable to 1.235V  
All surface mount solution  
Internally compensated with fast transient response  
Over-current protection  
The thermal performance of the SPAK allows it to replace  
TO-220s and TO-263s (D2PAKs) in many applications.  
The SPAK saves board space with a 36% smaller footprint  
than TO-263.  
High-efciency is maintained over a wide output current  
range by utilizing a boost capacitor to increase the voltage  
available to saturate the internal power switch. As a result  
of this high-efciency, only the ground plane of the PCB is  
needed for a heat sink.  
Frequency foldback short-circuit protection  
Thermal shutdown  
The MIC4685 allows for a high degree of safety. It has a  
wide input voltage range of 4V to 30V (34V transient),  
allowing it to be used in applications where input voltage  
transients may be present. Built-in safety features include  
over-current protection, frequency-foldback short-circuit  
protection, and thermal shutdown.  
Applications  
Point-of-load power supplies  
Simple high-efciency step-down regulators  
5V to 3.3V/2A conversion  
12V to 5V/3.3V/2.5V/1.8V 3A conversion  
Dual-output ±5V conversion  
Base stations  
The MIC4685 is available in a 7-pin SPAK package with a  
junction temperature range of –40°C to +125°C.  
Data sheets and support documentation can be found on  
Micrel’s web site at www.micrel.com.  
LCD power supplies  
Battery chargers  
___________________________________________________________________________________________________________  
Typical Application  
VIN  
8V to 30V  
MIC4685_R  
CBS  
2
5
1
6
3
0.33µF/50V  
IN  
EN  
BS  
SW  
FB  
VOUT  
1.8V/3A  
L1  
R1  
3.01k  
39mH  
CIN  
33µF  
35V  
COUT  
330µF  
6.3V  
D1  
R2  
6.49k  
GND  
4, Tab  
3A  
40V  
1.8V Output Converter  
SuperSwitcher is a trademark of Micrel, 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  
M9999-012610  
January 2010  
1

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