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參數(shù)資料
| 型號(hào)： | MIC5254 |
| 廠商： | Micrel Semiconductor,Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | DUAL 150MA UCAP LDO WITH ERROR FLAG OUTPUTS |
| 中文描述： | 150mA雙路LDO的管理平臺(tái)與錯(cuò)誤標(biāo)志輸出 |
| 文件頁數(shù)： | 10/11頁 |
| 文件大?。?/td> | 160K |
| 代理商： | MIC5254 |
MIC5254
Micrel
MIC5254
10
September 2003
Each output is rated for 150mA of output current, but the
application may limit the amount of output current based on
the total power dissipation and the ambient temperature. A
typical application may call for one 3.3V output and one 2.5V
output from a single Li-Ion battery input. This input can be as
high as 4.2V.
When operating at high ambient temperatures, the output
current may be limited. When operating at an ambient of
60
°
C, the maximum power dissipation of the package is
calculated as follows:
P
125 C
200 C/W
6
C
D(max)
=
°
0
P
D
= 325mW
For the application mentioned above, if regulator 1 is sourcing
150mA, it contributes the following to the overall power
dissipation:
P
D(reg2)
= (V
IN
– V
OUT
)I
OUT
+ V
IN
×
I
GND
P
D(reg1)
= (4.2V – 3.3V)150mA + 4.2V
×
100
μ
A
P
D(reg1)
= 135.5mW
Since the total power dissipation allowable is 325mW, the
maximum power dissipation of the second regulator is limited
to:
P
D(max)
= P
D(reg1)
+ P
D(reg2)
325mW = 135.5mW + P
D(reg2)
P
D(reg2)
= 189.5mW
The maximum output current of the second regulator can be
calculated using the same equations but solving for the
output current (ground current is constant over load and
simplifies the equation):
P
D(reg2)
= (V
IN
– V
OUT
)I
OUT
+ V
IN
×
I
GND
189.5mW = (4.2V – 2.5V)I
OUT
+ 4.2V
×
100
μ
A
I
OUT
= 111.2mA
The second output is limited to 110mA due to the total power
dissipation of the system when operating at 60
°
C ambient
temperature.
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| MIC5254-SJBMM | DUAL 150MA UCAP LDO WITH ERROR FLAG OUTPUTS |
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| MIC5256-3.3BM5 | 150mA UCap LDO with Error Flag |
| MIC5256 | 4.5V to 20V, 6A Synchronous Step Down SWIFT? Converter 16-HTSSOP -40 to 150 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC5254_07 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Dual 150mA μCap LDO with Error Flag Outputs |
| MIC5254-SJBMM | 功能描述:IC REG LDO 3.3/2.5V .15A 10-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 |
| MIC5254-SJBMM TR | 功能描述:IC REG LDO 3.3/2.5V .15A 10-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 |
| MIC5254-SJYMM | 功能描述:低壓差穩(wěn)壓器 - LDO Dual 150mA/150mA Cap LDO with Error Flag Outputs (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(dòng)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 |
| MIC5254-SJYMM TR | 功能描述:低壓差穩(wěn)壓器 - LDO Dual 150mA/150mA Cap LDO with Error Flag Outputs (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(dòng)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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