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參數(shù)資料
| 型號： | MIC5208 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | Dual 50mA LDO Voltage Regulator Preliminary Information |
| 中文描述： | 兩個50mA LDO穩(wěn)壓器的初步信息 |
| 文件頁數(shù)： | 6/6頁 |
| 文件大小： | 54K |
| 代理商： | MIC5208 |
1997
3-173
MIC5208
Applications Information
Supply/Ground
Both MIC5208 GND pins must be connected to the same
ground potential. INA and INB can each be connected to a
different supply.
Enable/Shutdown
ENA (enable/shutdown) and ENB may be enabled sepa-
rately. Forcing ENA/B high (> 2V) enables the associated
regulator. ENA/B requires a small amount of current, typically
15
μ
A. While the logic threshold is TTL/CMOS compatible,
ENA/B may be forced as high as 20V, independent of V
IN
.
Input Capacitor
A 0.1
μ
F capacitor should be placed from IN to GND if there is
more than 10 inches of wire between the input and the ac filter
capacitor or if a battery is used as the input.
Output Capacitor
An output capacitor is required between OUT and GND to
prevent oscillation. Larger values improve the regulator’s
transient response. The output capacitor value may be in-
creased without limit.
The output capacitor should have an ESR (effective series
resistance) of about 5
or less and a resonant frequency
above 500kHz. Most tantalum or aluminum electrolytic ca-
pacitors are adequate; film types will work, but are more
expensive. Since many aluminum electrolytics have electro-
lytes that freeze at about –30
°
C, solid tantalums are recom-
mended for operation below –25
°
C.
At lower values of output current, less output capacitance is
required for output stability. The capacitor can be reduced to
0.22
μ
F for current below 10mA or 0.1
μ
F for currents below
1mA.
Micrel
3
No-Load Stability
The MIC5208 will remain stable and in regulation with no load
(other than the internal voltage divider) unlike many other
voltage regulators. This is especially important in CMOS RAM
keep-alive applications.
Thermal Shutdown
Thermal shutdown is independent on both halves of the dual
MIC5208, however, an overtemperature condition in one half
may affect the other half because of proximity.
Thermal Considerations
Multilayer boards having a ground plane, wide traces near the
pads, and large supply bus lines provide better thermal
conductivity.
The MIC5208-xxBMM (8-lead MSOP) has a thermal resis-
tance of 200
°
C/W when mounted on a FR4 board with
minimum trace widths and no ground plane.
PC Board
Dielectric
θ
JA
FR4
200
°
C
MSOP Thermal Characteristics
For additional heat sink characteristics, please refer to Micrel
Application Hint 17, “Calculating P.C. Board Heat Sink Area
For Surface Mount Packages”.
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| MIC5208-3.3BMM | Dual 50mA LDO Voltage Regulator |
| MIC5208-3.6BMM | Dual 50mA LDO Voltage Regulator Preliminary Information |
| mic5211 | Dual μCap 80mA LDO Regulator(輸出電流80mA μCap技術(shù)低壓差雙穩(wěn)壓器) |
| MIC5211-3.0BM6 | Paired Cable; Number of Conductors:30; Conductor Size AWG:18; No. Strands x Strand Size:Solid; Jacket Material:Polyvinylchloride (PVC); Number of Pairs:15; Voltage Nom.:300V RoHS Compliant: Yes |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC5208-3.0BMM | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MIC5208-3.3BMM | 功能描述:IC REG LDO 3.3V 50MA 8-MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:500 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:12V 輸入電壓:14.5 V ~ 35 V 電壓 - 壓降（標(biāo)準(zhǔn)）:- 穩(wěn)壓器數(shù)量:1 電流 - 輸出:500mA 電流 - 限制（最小）:- 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:TO-205AD，TO-39-3 金屬罐 供應(yīng)商設(shè)備封裝:TO-39 包裝:散裝 其它名稱:*LM78M12CH*LM78M12CH/NOPBLM78M12CH |
| MIC5208-3.3BMM TR | 功能描述:IC REG LDO 3.3V 50MA 8-MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:500 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:12V 輸入電壓:14.5 V ~ 35 V 電壓 - 壓降（標(biāo)準(zhǔn)）:- 穩(wěn)壓器數(shù)量:1 電流 - 輸出:500mA 電流 - 限制（最?。?- 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:TO-205AD，TO-39-3 金屬罐 供應(yīng)商設(shè)備封裝:TO-39 包裝:散裝 其它名稱:*LM78M12CH*LM78M12CH/NOPBLM78M12CH |
| MIC5208-3.3YMM | 功能描述:低壓差穩(wěn)壓器 - LDO Dual 50mA 3% Cap LDO (Lead Free) RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MIC5208-3.3YMM TR | 功能描述:低壓差穩(wěn)壓器 - LDO Dual 50mA 3% Cap LDO (Lead Free) RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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