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参数资料
| 型号： | LT1083CK-12 |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 3A, 5A, 7.5A Low Dropout Positive Fixed Regulators |
| 中文描述： | 12 V FIXED POSITIVE LDO REGULATOR, 1.5 V DROPOUT, MBFM2 |
| 封装： | METAL CAN, TO-3, 2 PIN |
| 文件页数： | 9/12页 |
| 文件大小： | 287K |
| 代理商： | LT1083CK-12 |
9
LT1083/84/85 Fixed
thermal resistance specifications have been developed to
more accurately reflect device temperature and ensure
safe operating temperatures. The data section for these
new regulators provides a separate thermal resistance and
maximum junction temperature for both the Control Sec-
tionand the Power Section Previous regulators, with a
single junction-to-case thermal resistance specification,
used an average of the two values provided here and
therefore could allow excessive junction temperatures
under certain conditions of ambient temperature and heat
sink resistance. To avoid this possibility, calculations
should be made for both sections to ensure that both
thermal limits are met.
Junction-to-case thermal resistance is specified from the
IC junction to the bottom of the case directly below the die.
This is the lowest resistance path for heat flow. Proper
mounting is required to ensure the best possible thermal
flow from this area of the package to the heat sink. Thermal
compound at the case-to-heat sink interface is strongly
recommended. If the case of the device must be electroni-
cally isolated, a thermally conductive spacer can be used
as long as its added contribution to thermal resistance is
considered. Note that the case of all devices in this series
is electronically connected to the ouput.
For example, using a LT1083-5CK (TO-3, Commercial)
and assuming:
V
IN
(max continuous) = 9V, V
OUT
= 5V, I
OUT
= 6A,
T
A
= 75
°
C
θ
HEAT SINK
= 1
°
C/W,
θ
CASE-TO-HEAT SINK
= 0.2
°
C/W for K package with
thermal compound.
Power dissipation under these conditions is equal to:
P
D
= (V
IN
– V
OUT
) (I
OUT
) = 24W
Junction temperature will be equal to:
T
J
= T
A
+
P
D
(
θ
HEAT SINK
+ θ
CASE-TO-HEAT SINK
+
θ
JC
)
For the Control Section:
T
J
= 75
°
C
+
24W (1
°
C/W
+
0.2
°
C/W
+
0.6
°
C/W) =
118
°
C
118
°
C < 125
°
C = T
JMAX
(Control Section Commer-
cial Range)
For the Power Transistor:
T
J
= 75
°
C
+
24W (1
°
C/W
+
0.2
°
C/W
+
1.6
°
C/W) =
142
°
C
142
°
C < 150
°
C = T
JMAX
(Power Transistor Commer-
cial Range)
In both cases the junction temperature is below the
maximum rating for the respective sections, ensuring
reliable operation.
APPLICATIO
S I
FOR
ATIO
U
W
U
U
High Efficiency Regulator
+
–
+
28V
INPUT
28V
470
28V
4N28
1N914
1N914
LT1011
10k
10k
10k
1k
1M
MR1122
1mH
10,000μF
OUTPUT
LT1083-5 OUT
IN
GND
LT1083/4/5 TA03
TYPICAL APPLICATIO
N
S
相关PDF资料 |
PDF描述 |
|---|---|
| LT1083CK-5 | 3A, 5A, 7.5A Low Dropout Positive Fixed Regulators |
| LT1083MK-12 | 3A, 5A, 7.5A Low Dropout Positive Fixed Regulators |
| LT1083MK-5 | 3A, 5A, 7.5A Low Dropout Positive Fixed Regulators |
| LT1084CP-12 | 3A, 5A, 7.5A Low Dropout Positive Fixed Regulators |
| LT1084CT-12 | 3A, 5A, 7.5A Low Dropout Positive Fixed Regulators |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1083CP | 功能描述:IC REG LDO ADJ 7.5A TO-3P-3 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，固定式 输出电压:2.5V 输入电压:2.5 V ~ 5.5 V 电压 - 压降（标准）:- 稳压器数量:1 电流 - 输出:300mA（最小值） 电流 - 限制（最小）:360mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 供应商设备封装:TSOT-23-5 包装:带卷 (TR) |
| LT1083CP#PBF | 功能描述:IC REG LDO ADJ 7.5A TO-3P-3 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，固定式 输出电压:2.5V 输入电压:2.5 V ~ 5.5 V 电压 - 压降（标准）:- 稳压器数量:1 电流 - 输出:300mA（最小值） 电流 - 限制（最小）:360mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 供应商设备封装:TSOT-23-5 包装:带卷 (TR) |
| LT1083CP-12 | 功能描述:IC REG LDO 12V 7.5A TO-3P-3 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，固定式 输出电压:2.5V 输入电压:2.5 V ~ 5.5 V 电压 - 压降（标准）:- 稳压器数量:1 电流 - 输出:300mA（最小值） 电流 - 限制（最小）:360mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 供应商设备封装:TSOT-23-5 包装:带卷 (TR) |
| LT1083CP-12#PBF | 功能描述:IC REG LDO 12V 7.5A TO-3P-3 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，固定式 输出电压:2.5V 输入电压:2.5 V ~ 5.5 V 电压 - 压降（标准）:- 稳压器数量:1 电流 - 输出:300mA（最小值） 电流 - 限制（最小）:360mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 供应商设备封装:TSOT-23-5 包装:带卷 (TR) |
| LT1083CP-12PBF | 制造商:Linear Technology 功能描述:7500mA,12V,LDO Voltage Reg.,LT1083CP-12 |
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