参数资料
| 型号： | LT3085EMS8E#PBF |
| 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： | LT3085 Adjustable Low Dropout Regulator More Information on LDOs |
| 标准包装： | 50 |
| 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： | -40°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： | 管件 |
| 产品目录页面： | 1331 (CN2011-ZH PDF) |
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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
相关PDF资料 |
PDF描述 |
|---|---|
| LT1121IS8-5#PBF | IC REG LDO 5V .15A 8-SOIC |
| HMC17DRTI-S13 | CONN EDGECARD 34POS .100 EXTEND |
| RSC12DTES | CONN EDGECARD 24POS .100 EYELET |
| EMM28DTMS | CONN EDGECARD 56POS R/A .156 SLD |
| HSC22DRES-S13 | CONN EDGECARD 44POS .100 EXTEND |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3085EMS8E-TR | 制造商:LINER 制造商全称:Linear Technology 功能描述:Adjustable 500mA Single Resistor Low Dropout Regulator |
| LT3085EMS8E-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Adjustable 500mA Single Resistor Low Dropout Regulator |
| LT3085IDCB | 制造商:LINER 制造商全称:Linear Technology 功能描述:Adjustable 500mA Single Resistor Low Dropout Regulator |
| LT3085IDCB#PBF | 制造商:Linear Technology 功能描述:LDO Regulator Pos 0V to 36V 0.5A 6-Pin DFN EP 制造商:Linear Technology 功能描述:LDO Regulator Pos 0V to 36V 0.5A 6-Pin DFN EP Bulk |
| LT3085IDCB#TRMPBF | 功能描述:IC REG LDO ADJ .5A 6-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:800 系列:- 稳压器拓扑结构:正，固定式 输出电压:2.5V 输入电压:最高 16V 电压 - 压降（标准）:0.7V @ 4A 稳压器数量:1 电流 - 输出:4A 电流 - 限制（最小）:4.2A 工作温度:0°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-263-6，D²Pak（5 引线+接片），TO-263BA 供应商设备封装:TO-263-5 包装:带卷 (TR) 其它名称:AP1184K525L-13AP1184K525LDITR |
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