参数资料
| 型号： | LT3082EST#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 12/20页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ .2A SOT223-3 |
| 产品培训模块： | LT3082 - 200mA Single Resistor Low Dropout Linear Regulator |
| 标准包装： | 78 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 可调 |
| 输入电压： | 1.2 V ~ 40 V |
| 电压 - 压降（标准）： | 1.3V @ 200mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 200mA（最小值） |
| 电流 - 限制（最小）： | 200mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-261-4，TO-261AA |
| 供应商设备封装： | SOT-223 |
| 包装： | 管件 |
| 产品目录页面： | 1331 (CN2011-ZH PDF) |
LT3082
APPLICATIONS INFORMATION
The LT3082 uses a unity-gain follower from the SET pin
to the OUT pin. Therefore, multiple possibilities exist
(besides a SET pin resistor) to set output voltage. For
IN
10μA
LT3082
example, using a high accuracy voltage reference from
SET to GND removes the errors in output voltage due to
reference current tolerance and resistor tolerance. Active
driving of the SET pin is acceptable.
The typical noise scenario for a linear regulator is that the
output voltage setting resistor divider gains up the noise
SET
3082 F06
+
–
R SET
OUT
PARASITIC
RESISTANCE
R P
R P
R P
LOAD
reference, especially if V OUT is much greater than V REF . The
LT3082’s noise advantage is that the unity-gain follower
presents no noise gain whatsoever from the SET pin to the
output. Thus, noise ?gures do not increase accordingly.
Error ampli?er noise is typical 100nV/√ Hz (33μV RMS over
the 10Hz to 100kHz bandwidth). The error ampli?er’s noise
is RMS summed with the other noise terms to give a ?nal
noise ?gure for the regulator.
Curves in the Typical Performance Characteristics sec-
tion show noise spectral density and peak-to-peak noise
characteristics for both the reference current and error
ampli?er over the 10Hz to 100kHz bandwidth.
Load Regulation
The LT3082 is a ?oating device. No ground pin exists on
the packages. Thus, the IC delivers all quiescent current
and drive current to the load. Therefore, it is not possible
to provide true remote load sensing. The connection resis-
tance between the regulator and the load determines load
regulation performance. The data sheet’s load regulation
speci?cation is Kelvin sensed at the package’s pins. Nega-
tive-side sensing is a true Kelvin connection by returning
the bottom of the voltage setting resistor to the negative
side of the load (see Figure 6).
Connected as shown, system load regulation is the sum
of the LT3082’s load regulation and the parasitic line
resistance multiplied by the output current. To minimize
load regulation, keep the positive connection between the
regulator and load as short as possible. If possible, use
large diameter wire or wide PC board traces.
Figure 6. Connections for Best Load Regulation
Thermal Considerations
The LT3082’s internal power and thermal limiting circuitry
protects itself under overload conditions. For continuous
normal load conditions, do not exceed the 125°C maximum
junction temperature. Carefully consider all sources of
thermal resistance from junction-to-ambient. This includes
(but is not limited to) junction-to-case, case-to-heat sink
interface, heat sink resistance or circuit board-to-ambient
as the application dictates. Consider all additional, adjacent
heat generating sources in proximity on the PCB.
Surface mount packages provide the necessary heatsinking
by using the heat spreading capabilities of the PC board,
copper traces and planes. Surface mount heat sinks, plated
through-holes and solder-?lled vias can also spread the
heat generated by power devices.
Junction-to-case thermal resistance is speci?ed from
the IC junction to the bottom of the case directly, or
the bottom of the pin most directly, in the heat path.
This is the lowest thermal resistance path for heat ?ow.
Only proper device mounting ensures the best possible
thermal ?ow from this area of the package to the heat
sinking material.
Note that the Exposed Pad of the DFN package and the
tab of the SOT-223 package is electrically connected to
the output (V OUT ).
3082f
12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3082ESTTR | 制造商:LINER 制造商全称:Linear Technology 功能描述:200mA Single Resistor Low Dropout Linear Regulator |
| LT3082ESTTRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:200mA Single Resistor Low Dropout Linear Regulator |
| LT3082ETS8 | 制造商:LINER 制造商全称:Linear Technology 功能描述:200mA Single Resistor Low Dropout Linear Regulator |
| LT3082ETS8#PBF | 制造商:Linear Technology 功能描述:LDO Regulator Pos 0V to 40V 0.2A 8-Pin TSOT-23 制造商:Linear Technology 功能描述:Bulk 制造商:Linear Technology 功能描述:LDO ADJ 200mA SOT-23-8 制造商:Linear Technology 功能描述:LDO, ADJ, 200mA, SOT-23-8; Primary Input Voltage:40V; Dropout Voltage Vdo:1.3V; No. of Pins:8; Output Current:200mA; Operating Temperature Min:-40C; Operating Temperature Max:125C; Package / Case:8-SOT-23 ;RoHS Compliant: Yes |
| LT3082ETS8#TRMPBF | 功能描述:IC REG LDO ADJ .2A SOT23-8 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 产品培训模块:MIC5365/66 Ultra-small LDO Regulators 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3V 输入电压:最高 5.5V 电压 - 压降（标准）:0.155V @ 150mA 稳压器数量:1 电流 - 输出:150mA 电流 - 限制（最小）:200mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:4-UDFN 裸露焊盘，4-TMLF? 供应商设备封装:4-TMLF?（1x1） 包装:Digi-Reel® 其它名称:576-3192-6 |
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