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LT3050的基本参数
  • 制造厂商:AD
  • 产品类别:LDO 线性稳压器
  • 技术类目:正线性稳压器(LDO)
  • 功能描述:具精准电流限值和诊断功能的 100mA、性稳压器
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LT3050的产品详情:

LT3050 系列是一款微功率、低噪声、低压差电压 (LDO) 线性稳压器。该器件可提供 100mA 的输出电流和一个 340mV 的压差电压。一个 10nF 的旁路电容器将输出噪声降低至 30μVRMS (在一个 10Hz 至 100kHz 的带宽内),并对基准实施软起动。LT3050 的 ±45V 额定输入电压以及其精准的电流限值和诊断功能使得该 IC 成为坚固、高可靠性系统的理想选择。

由单个电阻器负责设置 LT3050 的电流限值,并在一个宽输入电压和温度范围内实现 ±5% 的准确度。利用单个电阻器来设置 LT3050 的最小输出电流监视器,对于检测开路情况是很有用。电流监视器功能电路提供了一个等于 1/100 输出电流的电流。如果 LT3050 处于电流限制状态、在低于其最小输出电流的条件下运作 (开路) 或处于热停机状态,则一个逻辑 FAULT  引脚将确定为低电平。

LT3050 利用低 ESR 陶瓷电容器优化稳定性和瞬态响应,所需的最小电容为 2.2μF。LT3050 可用作一款具一个低至0.6V 基准的输出电压范围的可调型器件。LT3050 采用耐热性能增强型 12 引脚 3mm x 2mm DFN 和 MSOP 封装。


Applications

  • 受保护的天线电源
  • 汽车信息服务系统
  • 工业应用 (货车、叉式升降机 … 等)
  • 高可靠性应用
LT3050的优势和特点:
  • 输出电流监视器:IOUT 的 1/100
  • 故障指示器:电流限值、最小 IOUT 或热限值
  • 输出电流:100mA
  • 压差电压:340mV
  • 输入电压范围:1.6V 至 45V
  • 可编程精准电流限值:±5%
  • 可编程最小 IOUT 监视器 
  • 低噪声:30μVRMS (10Hz 至 100kHz)
  • 可调输出 (VREF = VOUT(MIN) = 0.6V)
  • 固定输出电压:3.3V、5V
  • 输出容差:±2% (在整个电压、负载和温度范围)
  • 可在采用低 ESR 陶瓷输出电容器 (最小电容值为 2.2μF) 时保持稳定
  • 停机电流:<1μA
  • 反向电池、反向输出和反向电流保护功能
  • 热限制保护
  • 12 引脚 3mm x 2mm DFN 封装和 MSOP 封装
LT3050具体的完整产品型号参数及价格(美元):

LT3050EDDB#TRMPBF,封装:12-Lead DFN (3mm x 2mm w/ EP),包装形式及数量:卷带,500,工作温度:-40 to 125C,AD官网报价:2.07(100-499个);1.76(1000+个)

LT3050EDDB#TRPBF,封装:12-Lead DFN (3mm x 2mm w/ EP),包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:2.07(100-499个);1.76(1000+个)

LT3050EDDB-3.3#TRMPBF,封装:12-Lead DFN (3mm x 2mm w/ EP),包装形式及数量:卷带,500,工作温度:-40 to 125C,AD官网报价:2.07(100-499个);1.76(1000+个)

LT3050EDDB-3.3#TRPBF,封装:12-Lead DFN (3mm x 2mm w/ EP),包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:2.07(100-499个);1.76(1000+个)

LT3050EDDB-5#TRMPBF,封装:12-Lead DFN (3mm x 2mm w/ EP),包装形式及数量:卷带,500,工作温度:-40 to 125C,AD官网报价:2.07(100-499个);1.76(1000+个)

LT3050EDDB-5#TRPBF,封装:12-Lead DFN (3mm x 2mm w/ EP),包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:2.07(100-499个);1.76(1000+个)

LT3050EMSE#PBF,封装:12-Lead MSOP w/ EP,包装形式及数量:管装,37,工作温度:-40 to 125C,AD官网报价:2.18(100-499个);1.77(1000+个)

LT3050EMSE#TRPBF,封装:12-Lead MSOP w/ EP,包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:2.18(100-499个);1.77(1000+个)

LT3050EMSE-3.3#PBF,封装:12-Lead MSOP w/ EP,包装形式及数量:管装,37,工作温度:-40 to 125C,AD官网报价:2.18(100-499个);1.77(1000+个)

LT3050EMSE-3.3#TRPBF,封装:12-Lead MSOP w/ EP,包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:2.18(100-499个);1.77(1000+个)

LT3050EMSE-5#PBF,封装:12-Lead MSOP w/ EP,包装形式及数量:管装,37,工作温度:-40 to 125C,AD官网报价:2.18(100-499个);1.77(1000+个)

LT3050EMSE-5#TRPBF,封装:12-Lead MSOP w/ EP,包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:2.18(100-499个);1.77(1000+个)

LT3050IDDB#TRMPBF,封装:12-Lead DFN (3mm x 2mm w/ EP),包装形式及数量:卷带,500,工作温度:-40 to 125C,AD官网报价:2.34(100-499个);1.98(1000+个)

LT3050IDDB#TRPBF,封装:12-Lead DFN (3mm x 2mm w/ EP),包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:2.34(100-499个);1.98(1000+个)

LT3050IDDB-3.3#TRMPBF,封装:12-Lead DFN (3mm x 2mm w/ EP),包装形式及数量:卷带,500,工作温度:-40 to 125C,AD官网报价:2.34(100-499个);1.98(1000+个)

LT3050IDDB-3.3#TRPBF,封装:12-Lead DFN (3mm x 2mm w/ EP),包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:2.34(100-499个);1.98(1000+个)

LT3050IDDB-5#TRMPBF,封装:12-Lead DFN (3mm x 2mm w/ EP),包装形式及数量:卷带,500,工作温度:-40 to 125C,AD官网报价:2.34(100-499个);1.98(1000+个)

LT3050IDDB-5#TRPBF,封装:12-Lead DFN (3mm x 2mm w/ EP),包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:2.34(100-499个);1.98(1000+个)

LT3050IMSE#PBF,封装:12-Lead MSOP w/ EP,包装形式及数量:管装,37,工作温度:-40 to 125C,AD官网报价:2.45(100-499个);1.99(1000+个)

LT3050IMSE#TRPBF,封装:12-Lead MSOP w/ EP,包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:2.45(100-499个);1.99(1000+个)

LT3050IMSE-3.3#PBF,封装:12-Lead MSOP w/ EP,包装形式及数量:管装,37,工作温度:-40 to 125C,AD官网报价:2.45(100-499个);1.99(1000+个)

LT3050IMSE-3.3#TRPBF,封装:12-Lead MSOP w/ EP,包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:2.45(100-499个);1.99(1000+个)

LT3050IMSE-5#PBF,封装:12-Lead MSOP w/ EP,包装形式及数量:管装,37,工作温度:-40 to 125C,AD官网报价:2.45(100-499个);1.99(1000+个)

LT3050IMSE-5#TRPBF,封装:12-Lead MSOP w/ EP,包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:2.45(100-499个);1.99(1000+个)

LT3050MPMSE#PBF,封装:12-Lead MSOP w/ EP,包装形式及数量:管装,37,工作温度:-55 to 125C,AD官网报价:5.71(100-499个);4.68(1000+个)

LT3050MPMSE#TRPBF,封装:12-Lead MSOP w/ EP,包装形式及数量:卷带,2500,工作温度:-55 to 125C,AD官网报价:5.71(100-499个);4.68(1000+个)

LT3050MPMSE-3.3#PBF,封装:12-Lead MSOP w/ EP,包装形式及数量:管装,37,工作温度:-55 to 125C,AD官网报价:5.71(100-499个);4.68(1000+个)

LT3050MPMSE-3.3#TRPBF,封装:12-Lead MSOP w/ EP,包装形式及数量:卷带,2500,工作温度:-55 to 125C,AD官网报价:5.71(100-499个);4.68(1000+个)

LT3050MPMSE-5#PBF,封装:12-Lead MSOP w/ EP,包装形式及数量:管装,37,工作温度:-55 to 125C,AD官网报价:5.71(100-499个);4.68(1000+个)

LT3050MPMSE-5#TRPBF,封装:12-Lead MSOP w/ EP,包装形式及数量:卷带,2500,工作温度:-55 to 125C,AD官网报价:5.71(100-499个);4.68(1000+个)

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LT3050的评估套件:

DC1515A:LT3050EDDB Demo Board | Micropower Low Noise, Low Dropout Linear Regulator, Current Limit, Diagnostics, 2V ≤ VIN ≤ 45V, VOUT = 1.2V/1.5V/1.8V/2.5V/3.3V/5V/Adjustable at 100mA

Demonstration circuit 1515 is an adjustable 100mA linear regulator featuring the LT3050. The LT3050 is a micropower, low noise and low dropout voltage linear regulator. The device supplies 100mA of output current with a dropout voltage of 340mV. A 10nF bypass capacitor reduces output noise to 30μVRMS (10Hz to 100kHz bandwidth) and soft-starts the reference. The demo board's 2V to 45V input voltage range combined with its precision current limit and diagnostic functions make the IC an ideal choice for robust, high reliability applications such as protected antenna power supplies. The jumper-selectable output voltage can be set to 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V or a user-defined voltage. The input and output pins can withstand up to ±50V and the output is short-circuit protected.


The internal current limit should be considered when the input-to-output differential is high. The LT3050's current limit can be programmed by a single resistor and is accurate to ±5% over a wide input voltage and temperature range. A single resistor programs the LT3050’s minimum output current monitor, useful for detecting open-circuit conditions. The current monitor function sources a current equal to 1/100th of output current. A logic FAULT pin asserts low if the LT3050 is in current limit, operating below its minimum output current (open-circuit) or is in thermal shutdown.

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