参数资料
| 型号： | LT3085MPMS8E#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 16/28页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ .5A 8-MSOP |
| 产品培训模块： | More Information on LDOs |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 可调 |
| 输入电压： | 1.2 V ~ 36 V |
| 电压 - 压降（标准）： | 1.35V @ 500mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 500mA |
| 电流 - 限制（最小）： | 500mA |
| 工作温度： | -55°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 供应商设备封装： | 8-MSOP-EP |
| 包装： | 带卷 (TR) |
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LT3085
APPLICATIONS INFORMATION
The power in the output transistor equals:
P OUTPUT = (V IN – V OUT )(I OUT )
The total power equals:
P TOTAL = P DRIVE + P OUTPUT
The current delivered to the SET pin is negligible and can
be ignored.
V CONTROL(MAX CONTINUOUS) = 3.630V (3.3V + 10%)
V IN(MAX CONTINUOUS) = 1.575V (1.5V + 5%)
Reducing Power Dissipation
In some applications it may be necessary to reduce
the power dissipation in the LT3085 package without
sacri?cing output current capability. Two techniques are
available. The ?rst technique, illustrated in Figure 8, em-
ploys a resistor in series with the regulator’s input. The
voltage drop across R S decreases the LT3085’s IN-to-OUT
differential voltage and correspondingly decreases the
LT3085’s power dissipation.
V IN
I CONTROL = OUT =
V OUT = 0.9V, I OUT = 0.5A, T A = 50°C
Power dissipation under these conditions is equal to:
P DRIVE = (V CONTROL – V OUT )(I CONTROL )
I 0.5A
= 8.3mA
60 60
C1
V CONTROL
LT3085
+
–
IN
OUT
R S
V IN
V OUT
P DRIVE = (3.630V – 0.9V)(8.3mA) = 23mW
P OUTPUT = (V IN – V OUT )(I OUT )
SET
R SET
C2
3085 F08
P OUTPUT = (1.575V – 0.9V)(0.5A) = 337mW
Total Power Dissipation = 360mW
Junction Temperature will be equal to:
T J = T A + P TOTAL ? θ JA (approximated using tables)
T J = 50°C + 360mW ? 73°C/W = 76°C
Figure 8. Reducing Power Dissipation Using a Series Resistor
As an example, assume: V IN = V CONTROL = 5V, V OUT = 3.3V
and I OUT(MAX) = 0.5A. Use the formulas from the Calculating
Junction Temperature section previously discussed.
In this case, the junction temperature is below the maximum
rating, ensuring reliable operation.
3085fb
16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3090EDD#PBF | 制造商:Linear Technology 功能描述:IC REG LDO NEG ADJ 0.6A 10DFN 制造商:Linear Technology 功能描述:IC, LINEAR VOLT REG, -36V, DFN-10 制造商:Linear Technology 功能描述:LDO, ADJ, 0V-32V, 600MA, DFN-10, Primary Input Voltage:-36V, Dropout Voltage Vdo 制造商:Linear Technology 功能描述:LDO, ADJ, 0V-32V, 600MA, DFN-10, Input Voltage Min:-36V, Input Voltage Max:-1.5V, Output Voltage Min:-32V, Output Voltage Max:0V, Output Current:600mA, Dropout Voltage Vdo:300mV, No. of Pins:10, Operating Temperature Min:-40C , RoHS Compliant: Yes |
| LT3090EMSE#PBF | 制造商:Linear Technology 功能描述:IC REG LDO NEG ADJ 0.6A 12MSOP 制造商:Linear Technology 功能描述:IC, LINEAR VOLT REG, -36V, MSOP-12 制造商:Linear Technology 功能描述:LDO, ADJ, 0V-32V, 600MA, MSOP-12, Primary Input Voltage:-36V, Dropout Voltage Vd |
| LT3090EMSE#TRPBF | 制造商:Linear Technology 功能描述:IC REG LDO NEG ADJ 0.6A 12MSOP 制造商:Linear Technology 功能描述:LDO, ADJ, 0V-32V, 600MA, MSOP-12, Primary Input Voltage:-36V, Dropout Voltage Vd |
| LT3090HDD#PBF | 制造商:Linear Technology 功能描述:IC REG LDO NEG ADJ 0.6A 10DFN 制造商:Linear Technology 功能描述:IC, LINEAR VOLT REG, -36V, DFN-10 制造商:Linear Technology 功能描述:LDO, ADJ, 0V-32V, 600MA, DFN-10, Input Voltage Min:-36V, Input Voltage Max:-1.5V, Output Voltage Min:-32V, Output Voltage Max:0V, Output Current:600mA, Dropout Voltage Vdo:300mV, No. of Pins:10, Operating Temperature Min:-40C , RoHS Compliant: Yes |
| LT3090HMSE#PBF | 制造商:Linear Technology 功能描述:IC REG LDO NEG ADJ 0.6A 12MSOP 制造商:Linear Technology 功能描述:IC, LINEAR VOLT REG, -36V, MSOP-12 |
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