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参数资料
| 型号： | LT3092IDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 14/22页 |
| 文件大小： | 249K |
| 描述： | IC PROG CURRENT SOURCE 8DFN |
| 标准包装： | 2,500 |
| 功能： | 电流源 |
| 精确度： | ±1% |
| 输入电压： | 1.2 V ~ 40 V |
| 电流 - 输出： | 200mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN 裸露焊盘 |
| 供应商设备封装： | 8-DFN-EP（3x3） |
| 包装： | 带卷 (TR) |
LT3092
14
3092fb
Demo circuit 1531As board layout using multiple inner
V
OUT
planes and multiple thermal vias achieves 28癈/W
performance for the DFN package.
Table 2. DD Package, 8-Lead DFN
COPPER AREA
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)
TOPSIDE* BACKSIDE BOARD AREA
2500mm
2
2500mm
2
2500mm
2
25癈/W
1000mm
2
2500mm
2
2500mm
2
25癈/W
225mm
2
2500mm
2
2500mm
2
28癈/W
100mm
2
2500mm
2
2500mm
2
32癈/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
2500mm
2
2500mm
2
2500mm
2
54癈/W
1000mm
2
2500mm
2
2500mm
2
54癈/W
225mm
2
2500mm
2
2500mm
2
57癈/W
100mm
2
2500mm
2
2500mm
2
63癈/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
2500mm
2
2500mm
2
2500mm
2
20癈/W
1000mm
2
2500mm
2
2500mm
2
20癈/W
225mm
2
2500mm
2
2500mm
2
24癈/W
100mm
2
2500mm
2
2500mm
2
29癈/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 ?0%, an output voltage of 12V ?%,
an output current of 200mA and a maximum ambient
temperature of 50癈, what would be the maximum junc-
tion temperature for a DFN package?
The total circuit power equals:
P
TOTAL
= (V
IN
V
OUT
)(I
OUT
)
The SET pin current is negligible and can be ignored.
V
IN(MAX CONTINUOUS)
= 16.5 (15V + 10%)
V
OUT(MIN CONTINUOUS)
= 11.4V (12V 5%)
I
OUT
= 200mA
Power dissipation under these conditions equals:
P
TOTAL
= (16.5 11.4V)(200mA) = 1.02W
Junction temperature equals:
T
J
= T
A
+ P
TOTAL
" ?/DIV>
JA
T
J
= 50癈 + (1.02W " 30癈/W) = 80.6癈
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癈. The thermal shutdown circuits
typical temperature threshold is 165癈 and has about
5癈 of hysteresis.
The LT3092s IN pin withstands ?0V voltages with respect
to the SET and OUT pins. Reverse-current ow, if OUT is
greater than IN, is less than 1mA (typically under 100糀),
protecting the LT3092 and sensitive loads.
Clamping diodes and 1k limiting resistors protect the
LT3092s 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 ?0V differential voltages and ?5mA crosspin
current ow without concern.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3092IST | 制造商:LINER 制造商全称:Linear Technology 功能描述:200mA 2-Terminal Programmable Current Source |
| LT3092IST#PBF | 功能描述:IC PROG CUR SOURCE SOT223 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳流/电流管理 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 功能:电流开关 检测方法:- 精确度:±10% 输入电压:1.7 V ~ 5.5 V 电流 - 输出:600mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-UFQFN 供应商设备封装:10-UTQFN（1.4x1.8） 包装:管件 |
| LT3092IST#PBF | 制造商:Linear Technology 功能描述:PROGRAMMABLE CURRENT SOURCE S 制造商:Linear Technology 功能描述:PROGRAMMABLE CURRENT SOURCE, SOT-223-3 |
| LT3092IST#TRPBF | 功能描述:IC PROG CUR SOURCE SOT223 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳流/电流管理 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 功能:电流开关 检测方法:- 精确度:±10% 输入电压:1.7 V ~ 5.5 V 电流 - 输出:600mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-UFQFN 供应商设备封装:10-UTQFN（1.4x1.8） 包装:管件 |
| LT3092ISTPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:200mA 2-Terminal Programmable Current Source |
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