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參數(shù)資料
| 型號： | LT3092IST#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO3 |
| 封裝： | PLASTIC, SOT-223, 4 PIN |
| 文件頁數(shù)： | 6/22頁 |
| 文件大?。?/td> | 245K |
| 代理商： | LT3092IST#TR |
LT3092
14
3092fb
Demo circuit 1531A’s board layout using multiple inner
VOUT planes and multiple thermal vias achieves 28°C/W
performance for the DFN package.
Table 2. DD Package, 8-Lead DFN
COPPER AREA
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)
TOPSIDE*
BACKSIDE
BOARD AREA
2500mm2
25°C/W
1000mm2
2500mm2
25°C/W
225mm2
2500mm2
28°C/W
100mm2
2500mm2
32°C/W
*Device is mounted on topside
Table 3. TS8 Package, 8-Lead SOT-23
COPPER AREA
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)
TOPSIDE*
BACKSIDE
BOARD AREA
2500mm2
54°C/W
1000mm2
2500mm2
54°C/W
225mm2
2500mm2
57°C/W
100mm2
2500mm2
63°C/W
*Device is mounted on topside
Table 4. ST Package, 3-Lead SOT-223
COPPER AREA
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)
TOPSIDE*
BACKSIDE
BOARD AREA
2500mm2
20°C/W
1000mm2
2500mm2
20°C/W
225mm2
2500mm2
24°C/W
100mm2
2500mm2
29°C/W
*Device is mounted on topside
For further information on thermal resistance and using thermal information,
refer to JEDEC standard JESD51, notably JESD51-12.
Calculating Junction Temperature
Example: Given an industrial factory application with an
input voltage of 15V ±10%, an output voltage of 12V ±5%,
an output current of 200mA and a maximum ambient
temperature of 50°C, what would be the maximum junc-
tion temperature for a DFN package?
The total circuit power equals:
PTOTAL = (VIN – VOUT)(IOUT)
The SET pin current is negligible and can be ignored.
VIN(MAX CONTINUOUS) = 16.5 (15V + 10%)
VOUT(MIN CONTINUOUS) = 11.4V (12V – 5%)
IOUT = 200mA
Power dissipation under these conditions equals:
PTOTAL = (16.5 – 11.4V)(200mA) = 1.02W
Junction temperature equals:
TJ = TA + PTOTAL θJA
TJ = 50°C + (1.02W 30°C/W) = 80.6°C
In this example, the junction temperature is below the
maximum rating, ensuring reliable operation.
Protection Features
The LT3092 incorporates several protection features ideal
for battery-powered circuits, among other applications.
In addition to normal circuit protection features such as
current limiting and thermal limiting, the LT3092 protects
itself against reverse-input voltages, reverse-output volt-
ages, and reverse OUT-to-SET pin voltages.
Current limit protection and thermal overload protection
protect the IC against output current overload condi-
tions. For normal operation, do not exceed a junction
temperature of 125°C. The thermal shutdown circuit’s
typical temperature threshold is 165°C and has about
5°C of hysteresis.
The LT3092’s IN pin withstands ±40V voltages with respect
to the SET and OUT pins. Reverse-current ow, if OUT is
greater than IN, is less than 1mA (typically under 100μA),
protecting the LT3092 and sensitive loads.
Clamping diodes and 1k limiting resistors protect the
LT3092’s SET pin relative to the OUT pin voltage. These
protection components typically only carry current under
transient overload conditions. These devices are sized to
handle ±10V differential voltages and ±15mA crosspin
current ow without concern.
APPLICATIONS INFORMATION
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相關(guān)代理商/技術(shù)參數(shù) |
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| LT3092ISTTRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:200mA 2-Terminal Programmable Current Source |
| LT3092ITS8 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:200mA 2-Terminal Programmable Current Source |
| LT3092ITS8#PBF | 制造商:Linear Technology 功能描述:Adjustable Current Source 8-Pin TSOT-23 制造商:Linear Technology 功能描述:Bulk |
| LT3092ITS8#TRMPBF | 功能描述:IC PROG CURRENT SOURCE TSOT23-8 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)流/電流管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 功能:電流開關(guān) 檢測方法:- 精確度:±10% 輸入電壓:1.7 V ~ 5.5 V 電流 - 輸出:600mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-UFQFN 供應(yīng)商設(shè)備封裝:10-UTQFN（1.4x1.8） 包裝:管件 |
| LT3092ITS8#TRPBF | 功能描述:IC PROG CURRENT SOURCE TSOT23-8 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)流/電流管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 功能:電流開關(guān) 檢測方法:- 精確度:±10% 輸入電壓:1.7 V ~ 5.5 V 電流 - 輸出:600mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-UFQFN 供應(yīng)商設(shè)備封裝:10-UTQFN（1.4x1.8） 包裝:管件 |
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