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參數(shù)資料
| 型號： | MIC4043 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | Low-Voltage Secondary-Side Shunt Regulator |
| 中文描述： | 低電壓二次側(cè)并聯(lián)穩(wěn)壓器 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 3293K |
| 代理商： | MIC4043 |
May 2000
1
MIC4043
MIC4043
Micrel
MIC4043
Low-Voltage Secondary-Side Shunt Regulator
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
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
V
OUT
MIC4043
MIC38HC43BN
COMP
V
DD
V
REF
GND
V
OUT
R
T
/C
T
FB
I
SNS
2
1
4
3
8
5
7
6
Return
1
2
7
6
4
3
FB
GND
SNK
IN
V
IN
OPTICAL
ISOLATION
COMPENSATION
MIC4043
Low-Side Feedback
Control
P
S
R1
R2
V
1.245V
R2
R1
1
OUT
=
+
200kHz DC-DC Flyback Converter
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
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC4043_02 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Low-Voltage Secondary-Side Shunt Regulator |
| MIC4043_11 | 制造商:MIC 制造商全稱:MIC GROUP RECTIFIERS 功能描述:Low-Voltage Secondary-Side Shunt Regulator Final Information |
| MIC4043BM4 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MIC4043BM4 TR | 功能描述:IC REG SHUNT LOW VOLT SOT-143 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
| MIC4043YM4 | 制造商:MIC 制造商全稱:MIC GROUP RECTIFIERS 功能描述:Low-Voltage Secondary-Side Shunt Regulator Final Information |
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