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线性和低压降 (LDO) 稳压器

LM2940C

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1A、26V、高 PSRR、低压降稳压器

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LM2940C

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产品详情

Output options Fixed Output Iout (max) (A) 1 Vin (max) (V) 26 Vin (min) (V) 6 Vout (max) (V) 15 Vout (min) (V) 5 Fixed output options (V) 5, 9, 12, 15 Rating Catalog Noise (µVrms) 150 PSRR at 100 KHz (dB) 54 Iq (typ) (mA) 10 Thermal resistance θJA (°C/W) 23, 41 Load capacitance (min) (µF) 22 Regulated outputs (#) 1 Accuracy (%) 5 Dropout voltage (Vdo) (typ) (mV) 500 Operating temperature range (°C) 0 to 125
Output options Fixed Output Iout (max) (A) 1 Vin (max) (V) 26 Vin (min) (V) 6 Vout (max) (V) 15 Vout (min) (V) 5 Fixed output options (V) 5, 9, 12, 15 Rating Catalog Noise (µVrms) 150 PSRR at 100 KHz (dB) 54 Iq (typ) (mA) 10 Thermal resistance θJA (°C/W) 23, 41 Load capacitance (min) (µF) 22 Regulated outputs (#) 1 Accuracy (%) 5 Dropout voltage (Vdo) (typ) (mV) 500 Operating temperature range (°C) 0 to 125
TO-220 (NDE) 3 46.5328 mm² 10.16 x 4.58 TO-220 (NDG) 3 193.548 mm² 10.16 x 19.05 TO-263 (KTT) 3 154.8384 mm² 10.16 x 15.24
  • Input Voltage Range = 6 V to 26 V
  • Dropout Voltage Typically 0.5 V at IOUT = 1 A
  • Output Current in Excess of 1 A
  • Output Voltage Trimmed Before Assembly
  • Reverse Battery Protection
  • Internal Short Circuit Current Limit
  • Mirror Image Insertion Protection
  • P+ Product Enhancement Tested
  • Input Voltage Range = 6 V to 26 V
  • Dropout Voltage Typically 0.5 V at IOUT = 1 A
  • Output Current in Excess of 1 A
  • Output Voltage Trimmed Before Assembly
  • Reverse Battery Protection
  • Internal Short Circuit Current Limit
  • Mirror Image Insertion Protection
  • P+ Product Enhancement Tested

The LM2940-N and LM2940C positive voltage regulators feature the ability to source 1 A of output current with a dropout voltage of typically 0.5 V and a maximum of 1 V over the entire temperature range. Furthermore, a quiescent current reduction circuit has been included which reduces the ground current when the differential between the input voltage and the output voltage exceeds approximately 3 V. The quiescent current with 1 A of output current and an input-output differential of 5 V is therefore only 30 mA. Higher quiescent currents only exist when the regulator is in the dropout mode (VIN − VOUT ≤ 3 V).

Designed also for vehicular applications, the LM2940-N and LM2940C and all regulated circuitry are protected from reverse battery installations or 2-battery jumps. During line transients, such as load dump when the input voltage can momentarily exceed the specified maximum operating voltage, the regulator will automatically shut down to protect both the internal circuits and the load. The LM2940-N and LM2940C cannot be harmed by temporary mirror-image insertion. Familiar regulator features such as short circuit and thermal overload protection are also provided.

The LM2940-N and LM2940C positive voltage regulators feature the ability to source 1 A of output current with a dropout voltage of typically 0.5 V and a maximum of 1 V over the entire temperature range. Furthermore, a quiescent current reduction circuit has been included which reduces the ground current when the differential between the input voltage and the output voltage exceeds approximately 3 V. The quiescent current with 1 A of output current and an input-output differential of 5 V is therefore only 30 mA. Higher quiescent currents only exist when the regulator is in the dropout mode (VIN − VOUT ≤ 3 V).

Designed also for vehicular applications, the LM2940-N and LM2940C and all regulated circuitry are protected from reverse battery installations or 2-battery jumps. During line transients, such as load dump when the input voltage can momentarily exceed the specified maximum operating voltage, the regulator will automatically shut down to protect both the internal circuits and the load. The LM2940-N and LM2940C cannot be harmed by temporary mirror-image insertion. Familiar regulator features such as short circuit and thermal overload protection are also provided.
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* 数据表 LM2940x 1-A Low Dropout Regulator 数据表 (Rev. J) PDF | HTML 2014年 12月 22日

设计和开发

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参考设计

TIDA-01414 — TPA3244 Dolby Atmos 条形音箱参考设计

TPA3244 Dolby Atmos® 条形音箱参考设计结合了超高清音频和高动态范围，从而通过小尺寸系统提供充满整个房间的音频体验。该设计利用 TI 的高性能 TPA3244 放大器、具有处理功能的 PCM5252 高性能 DAC 以及集成 SoC 来解码和呈现 Dolby Atmos®。条形音箱参考板使用 TI 用于独立通道处理的集成音频 DSP 来提供 10DAC + 放大器通道，该 DSP 包含数字有源分频器、DRC 和双二阶滤波器以支持 5.1.2 条形音箱输出配置。该设计使用 66AK2G 音频 SoC 进行 Dolby Atmos® 解码和呈现。
设计指南: PDF
原理图: PDF
封装 引脚 CAD 符号、封装和 3D 模型
TO-220 (NDE) 3 Ultra Librarian
TO-220 (NDG) 3 Ultra Librarian
TO-263 (KTT) 3 Ultra Librarian
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订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

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