参数资料
| 型号： | MIC4043BM4 TR |
| 厂商： | Micrel Inc |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG SHUNT LOW VOLT SOT-143 |
| 标准包装： | 3,000 |
| 应用： | 转换器，电源 |
| 输入电压： | 10V |
| 输出数： | 1 |
| 输出电压： | 10V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-253-4，TO-253AA |
| 供应商设备封装： | SOT-143 |
| 包装： | 带卷 (TR) |
| 其它名称： | MIC4043BM4TR MIC4043BM4TR-ND |
MIC4043
General Description
The MIC4043 is a shunt regulator optimized for secondary-
side regulation in low-voltage power supplies. Featuring an
output stage guaranteed to swing within 400mV of ground,
the MIC4043 can be used in power supplies operating down
to 1.8V, even with optoisolators requiring greater than 1.2V of
headroom.
In power supply applications, the MIC4043 normally drives
the LED of an optically isolated feedback circuit. The MIC4043
monitors a resistively-divided output voltage and sinks error
current through the optoisolator’s LED (secondary side); the
optoisolator’s transistor (primary side) provides this signal to
Micrel
MIC4043
Low-Voltage Secondary-Side Shunt Regulator
Final Information
Features
? Ideal for 1.8V switching converters
? Low-voltage operation
400mV maximum saturation over
operating temperature range
? Easy to use
voltage in, current out
? 2% voltage tolerance over operating temperature range
Applications
? Optically isolated low-volage power supplies
? Low-voltage discrete regulator control
the controller’s feedback input. The MIC4043 is also practical
for other voltage-monitoring applications requiring an open-
collector output.
The MIC4043 replaces conventional ’431-type shunt regula-
tors to allow low-voltage applications where there is inad-
equate headroom for a 2.5V regulator in series with an
optoisolator. Replacing ’431-type devices requires only a
minor change to the way that the resistive-divider values are
calculated.
Typical Application
OPTICAL
ISOLATION
MIC4043
IN SNK
GND FB
MIC4043
V IN
Low-Side Feedback
Control
COMPENSATION
V OUT
1
2
7
6
R1
R2
1
2
MIC38HC43BN
COMP V REF
FB
V DD
8
7
4
Return
V OUT = 1.245V ?
+ 1 ?
3
4
I SNS
R T /C T
V OUT
GND
6
5
3
? R2
? R1
?
?
200kHz DC-DC Flyback 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
November 2000
1
MIC4043
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC4043YM4 | 制造商:MIC 制造商全称:MIC GROUP RECTIFIERS 功能描述:Low-Voltage Secondary-Side Shunt Regulator Final Information |
| MIC4043YM4 TR | 功能描述:直流/直流开关调节器 Low-voltage secondary-side shunt 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 |
| MIC4043YM4-TR | 功能描述:- Converter, Power Supplies Voltage Regulator IC 1 Output SOT-143 制造商:microchip technology 系列:- 包装:* 零件状态:停产 应用:转换器，电源 电压 - 输入:10V 输出数:1 电压 - 输出:10V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:TO-253-4，TO-253AA 供应商器件封装:SOT-143 标准包装:1 |
| MIC4100 | 制造商:MIC 制造商全称:MIC GROUP RECTIFIERS 功能描述:100V Half Bridge MOSFET Drivers |
| MIC4100_11 | 制造商:MIC 制造商全称:MIC GROUP RECTIFIERS 功能描述:100V Half Bridge MOSFET Drivers |
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