參數(shù)資料
型號(hào)： MCP1726
廠商： Microchip Technology Inc.
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： 1A, Low Voltage, Low Quiescent Current LDO Regulator
中文描述： 1A中，低電壓，低靜態(tài)電流LDO穩(wěn)壓器
文件頁(yè)數(shù)： 20/30頁(yè)
文件大?。?/td> 431K
代理商： MCP1726
MCP1726
DS21936B-page 20
2005 Microchip Technology Inc.
Junction Temperature Estimate
To estimate the internal junction temperature, the
calculated temperature rise is added to the ambient or
offset temperature. For this example, the worst-case
junction temperature is estimated below:
As you can see from the result, this application will be
operating very near the maximum operating junction
temperature of 125°C. The PCB layout for this applica-
tion is very important as it has a significant impact on
the junction-to-ambient thermal resistance (R
θ
JA
) of
the 3X3 DFN package, which is very important in this
application.
Maximum Package Power Dissipation at
70°C Ambient Temperature
From this table you can see the difference in maximum
allowable power dissipation between the 3X3 DFN
package and the 8-pin SOIC package. This difference
is due to the exposed metal tab on the bottom of the
DFN package. The exposed tab of the DFN package
provides a very good thermal path from the die of the
LDO to the PCB. The PCB then acts like a heatsink,
providing more area to distribute the heat generated by
the LDO.
T
J
= T
JRISE
+ T
A(MAX)
T
J
= 48.8°C + 70.0°C
T
J
= 118.8°C
3X3DFN (41° C/W R
θ
JA
)
P
D(MAX)
= (125°C – 70°C) / 41° C/W
P
D(MAX)
= 1.34W
SOIC8 (150°C/Watt R
θ
JA
)
P
D(MAX)
= (125°C – 70°C)/ 150° C/W
P
D(MAX)
= 0.366W
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MCP1726-0802E/MF 功能描述:低壓差穩(wěn)壓器 - LDO 1A .8V Vout Extended Temp 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
MCP1726-0802E/SN 功能描述:低壓差穩(wěn)壓器 - LDO 1A .8V Vout Extended Temp 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
MCP1726-1202E/MF 功能描述:低壓差穩(wěn)壓器 - LDO 1A 1.2V Vout Extended Temp 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
MCP1726-1202E/SN 功能描述:低壓差穩(wěn)壓器 - LDO 1A 1.2V Vout Extended Temp 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
MCP1726-1802E/MF 功能描述:低壓差穩(wěn)壓器 - LDO 1A 1.8V Vout Extended Temp 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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