参数资料
| 型号： | MIC4684BM TR |
| 厂商： | Micrel Inc |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 8SOIC |
| 标准包装： | 2,500 |
| 系列： | SuperSwitcher™ |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 1.235V |
| 输入电压： | 4 V ~ 30 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 200kHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-SOIC |
| 其它名称： | MIC4684BMTR MIC4684BMTR-ND |
MIC4684
General Description
The MIC4684 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 MIC4684 achieves 2A of continuous current in an 8-lead
SO (small outline) package at 60°C ambient temperature.
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, no external heat sink is required. The MIC4684,
housed in an SO-8, can replace larger TO-220 and TO-263
packages in many applications.
The MIC4684 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.
The MIC4684 is available in an 8-lead SO package with a
junction temperature range of –40°C to +125°C.
Micrel, Inc.
MIC4684
2A High-Efficiency SuperSwitcher? Buck Regulator
Features
? SO-8 package with 2A continuous output current
? Over 85% efficiency
? Fixed 200kHz PWM operation
? Wide 4V to 30V input voltage range
? 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
Applications
? Simple high-efficiency step-down regulator
? 5V to 3.3V/1.7A converter (60°C ambient)
? 12V to 1.8V/2A converter (60°C ambient)
? On-card switching regulator
? Dual-output ±5V converter
? Battery charger
Ordering Information
Part Number
Standard
Pb-Free
MIC4684BM MIC4684YM
Voltage
Adj
Junction Temp. Range
-40°C to +125°C
Package
SOP-8
V IN
MIC4684BM
6.5V to 25V
VIN
BS
EN
SW
C IN
33μF
V OUT = 2.5V
Typical Application
3
8
FB
35V GND
2, 6, 7
4
1
5
C BS
0.33μF/50V
68μH
3A
40V
R1
3.01k
R2
3.01k
V OUT
2.5V/1.5A
330μF
6.3V
100
80
60
40
Efficiency
vs. Output Current
V OUT = 3.3V
V OUT = 1.8V
Adjustable Buck Converter
20
V IN = 5.0V
0
0
0. 5 1 1. 5
OUTPUT CURRENT (A)
2
Efficiency vs. Output Current
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
January 2010
1
M9999-012610
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC4684YM | 功能描述:直流/直流开关调节器 SO-8 Efficient Simple Buck Regulator (Lead Free) RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MIC4684YM TR | 功能描述:直流/直流开关调节器 SO-8 Efficient Simple Buck Regulator (Lead Free) RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MIC4684YM | 制造商:Micrel Inc 功能描述:IC VOLTAGE REGULATOR SOIC |
| MIC4684YM | 制造商:Micrel Inc 功能描述:Voltage Regulator IC |
| MIC4684YMTR | 制造商:Micrel 功能描述:Conv DC-DC Single Step Down 4V to 30V |
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