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MIC4685-3.3YR PDF预览

MIC4685-3.3YR

更新时间： 2024-02-08 14:15:31
品牌 Logo 应用领域
美国微芯 - MICROCHIP 开关
页数 文件大小 规格书
15页 2094K
描述
SWITCHING REGULATOR, 225kHz SWITCHING FREQ-MAX, PSSO7

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MIC4685-3.3YR 技术参数

是否Rohs认证： 符合生命周期：Active
包装说明：,Reach Compliance Code：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：e3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封装主体材料：PLASTIC/EPOXY
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：2.16 mm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：Matte Tin (Sn)
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：40
宽度：8 mmBase Number Matches：1

MIC4685-3.3YR 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.  
TheMIC4685achieves3Aofcontinuouscurrentinthe7-lead  
SPAK package.  
• Low 2mm profile SPAK package  
• 3A continuous output current  
• Wide 4V to 30V input voltage range (34V transient)  
• Fixed 200kHz PWM operation  
• 3.3V, 5V, and Adjustable output versions  
• Over 85% efficiency  
• Output voltage adjustable to 1.235V  
• All surface mount solution  
• Internally compensated with fast transient response  
• Over-current protection  
• Frequency foldback short-circuit protection  
• Thermal shutdown  
The thermal performance of the SPAK allows it to replace  
2
TO-220s and TO-263s (D PAKs) in many applications. The  
SPAK saves board space with a 36% smaller footprint than  
TO-263.  
High-efficiency 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-efficiency, only the ground plane of the PCB is  
needed for a heat sink.  
Applications  
• Point-of-load power supplies  
• Simple high-efficiency 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 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.  
• LCD power supplies  
• Battery chargers  
The MIC4685 is available in an 7-lead SPAK package with a  
junction temperature range of –40°C to +125°C.  
Ordering Information  
Part Number  
Standard  
Voltage  
Junction Temp. Range  
Package  
Pb-Free  
MIC4685BR  
MIC4685YR  
Adj.  
3.3V  
5.0V  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
SPAK-07L  
SPAK-07L  
SPAK-07L  
MIC4685-3.3BR  
MIC4685-5.0BR  
MIC4685-3.3YR  
MIC4685-5.0YR  
DBS  
3A, 20V  
Typical Applications  
VIN  
5V  
±10%  
CBS  
VIN  
8V to 30V  
0.33µF/50V  
MIC4685-3.3BR  
MIC4685BR  
CBS  
2
5
1
6
3
2
5
1
6
3
0.33µF/50V  
IN  
BS  
SW  
FB  
VOUT  
3.3V/2A  
IN  
BS  
SW  
FB  
VOUT  
1.8V/3A  
L1  
L1  
EN  
EN  
39µH  
R1  
39µH  
CIN  
68µF  
10V  
CIN  
33µF  
35V  
330µF  
6.3V  
3.01k  
COUT  
330µF  
6.3V  
D1  
D1  
R2  
6.49k  
GND  
4, Tab  
GND  
4, Tab  
3A  
3A  
20V  
40V  
5V to 3.3V Converter  
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  
March 2005  
1
M9999-031805  
1234567...15

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