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參數資料
| 型號： | MIC4043BM4 |
| 廠商： | MICREL INC |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | FPGA - 100000 SYSTEM GATE 2.5 VOLT - NOT RECOMMENDED for NEW DESIGN |
| 中文描述： | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 1.245 V, PDSO4 |
| 封裝： | SOT-143, 4 PIN |
| 文件頁數： | 1/12頁 |
| 文件大小： | 3293K |
| 代理商： | MIC4043BM4 |
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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相關代理商/技術參數 |
參數描述 |
|---|---|
| MIC4043BM4 TR | 功能描述:IC REG SHUNT LOW VOLT SOT-143 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - 專用型 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,000 系列:- 應用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數: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 供應商設備封裝: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 |
| MIC4043YM4 TR | 功能描述:直流/直流開關調節器 Low-voltage secondary-side shunt regulator (Lead Free) RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體: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:- 包裝:* 零件狀態:停產 應用:轉換器，電源 電壓 - 輸入:10V 輸出數:1 電壓 - 輸出:10V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:TO-253-4，TO-253AA 供應商器件封裝:SOT-143 標準包裝:1 |
| MIC4100 | 制造商:MIC 制造商全稱:MIC GROUP RECTIFIERS 功能描述:100V Half Bridge MOSFET Drivers |
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