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线性和低压降 (LDO) 稳压器

LM340

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1.5A、35V 线性稳压器

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数据表

LM340

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产品详情

Rating Catalog Vin (max) (V) 35 Vin (min) (V) 7.5 Iout (max) (A) 1.5 Output options Fixed Output Vout (max) (V) 15 Vout (min) (V) 5 Fixed output options (V) 5, 12, 15 Noise (µVrms) 40 PSRR at 100 KHz (dB) 50 Iq (typ) (mA) 6.5 Thermal resistance θJA (°C/W) 24 Load capacitance (min) (µF) 0 Regulated outputs (#) 1 Accuracy (%) 2.5 Dropout voltage (Vdo) (typ) (mV) 2000 Operating temperature range (°C) 0 to 125
Rating Catalog Vin (max) (V) 35 Vin (min) (V) 7.5 Iout (max) (A) 1.5 Output options Fixed Output Vout (max) (V) 15 Vout (min) (V) 5 Fixed output options (V) 5, 12, 15 Noise (µVrms) 40 PSRR at 100 KHz (dB) 50 Iq (typ) (mA) 6.5 Thermal resistance θJA (°C/W) 24 Load capacitance (min) (µF) 0 Regulated outputs (#) 1 Accuracy (%) 2.5 Dropout voltage (Vdo) (typ) (mV) 2000 Operating temperature range (°C) 0 to 125
SOT-223 (DCY) 4 45.5 mm² (6.5 mm × 7 mm) TO-220 (NDE) 3 46.5328 mm² (10.16 mm × 4.58 mm) TO-220 (NDG) 3 193.548 mm² (10.16 mm × 19.05 mm) TO-263 (KTT) 3 154.8384 mm² (10.16 mm × 15.24 mm)
  • Output Current up to 1.5 A
  • Available in Fixed 5-V, 12-V, and 15-V Options
  • Output Voltage Tolerances of ±2% at TJ = 25°C (LM340A)
  • Line Regulation of 0.01% / V of at 1-A Load (LM340A)
  • Load Regulation of 0.3% / A (LM340A)
  • Internal Thermal Overload, Short-Circuit and SOA Protection
  • Available in Space-Saving SOT-223 Package
  • Output Capacitance Not Required for Stability
  • Output Current up to 1.5 A
  • Available in Fixed 5-V, 12-V, and 15-V Options
  • Output Voltage Tolerances of ±2% at TJ = 25°C (LM340A)
  • Line Regulation of 0.01% / V of at 1-A Load (LM340A)
  • Load Regulation of 0.3% / A (LM340A)
  • Internal Thermal Overload, Short-Circuit and SOA Protection
  • Available in Space-Saving SOT-223 Package
  • Output Capacitance Not Required for Stability

The LM340 and LM7805 Family monolithic 3-terminal positive voltage regulators employ internal current-limiting, thermal shutdown and safe-area compensation, making them essentially indestructible. If adequate heat sinking is provided, they can deliver over 1.5-A output current. They are intended as fixed voltage regulators in a wide range of applications including local (on-card) regulation for elimination of noise and distribution problems associated with single-point regulation. In addition to use as fixed voltage regulators, these devices can be used with external components to obtain adjustable output voltages and currents.

Considerable effort was expended to make the entire series of regulators easy to use and minimize the number of external components. It is not necessary to bypass the output, although this does improve transient response. Input bypassing is needed only if the regulator is located far from the filter capacitor of the power supply.

LM7805 is also available in a higher accuracy and better performance version (LM340A). Refer to LM340A specifications in the LM340A Electrical Characterisitcs table.

The LM340 and LM7805 Family monolithic 3-terminal positive voltage regulators employ internal current-limiting, thermal shutdown and safe-area compensation, making them essentially indestructible. If adequate heat sinking is provided, they can deliver over 1.5-A output current. They are intended as fixed voltage regulators in a wide range of applications including local (on-card) regulation for elimination of noise and distribution problems associated with single-point regulation. In addition to use as fixed voltage regulators, these devices can be used with external components to obtain adjustable output voltages and currents.

Considerable effort was expended to make the entire series of regulators easy to use and minimize the number of external components. It is not necessary to bypass the output, although this does improve transient response. Input bypassing is needed only if the regulator is located far from the filter capacitor of the power supply.

LM7805 is also available in a higher accuracy and better performance version (LM340A). Refer to LM340A specifications in the LM340A Electrical Characterisitcs table.

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技术文档

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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 LM340, LM340A and LM7805 Family Wide VIN 1.5-A Fixed Voltage Regulators 数据表 (Rev. L) PDF | HTML 2016-9-29
应用手册 A Topical Index of TI LDO Application Notes (Rev. F) 2019-6-27
选择指南 Low Dropout Regulators Quick Reference Guide (Rev. P) 2018-3-21
模拟设计期刊 防止过热与 EMI 损坏的工业级设计考量 英语版 2014-6-6
应用手册 AB-12 Wide Adjustable Range PNP Voltage Regulator (Rev. B) 2013-5-6
应用手册 AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B) 2013-5-6
应用手册 AN-1028 Maximum Power Enhancement Techniques for Power Packages (Rev. B) 2013-5-6
应用手册 AN-103 LM340 Series Three Terminal Positive Regulators (Rev. A) 2013-5-6
应用手册 AN-298 Isolation Techniques for Signal Conditioning (Rev. B) 2013-5-6
应用手册 AN-256 Circuitry for Inexpensive Relative Humidity Measurement (Rev. B) 2013-5-6
应用手册 AN-182 Improving Power Supply Reliability with IC Power Regulators (Rev. B) 2013-5-5
应用手册 Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A) 2013-5-5
应用手册 Super Matched Bipolar Transistor Pair Sets New Standards for Drift and Noise (Rev. B) 2013-5-5
应用手册 Packaging Limits Range of Linear Regulators 2010-5-8
应用手册 Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A) 2008-6-4
用户指南 A User's Guide to Compensating Low-Dropout Regulators 2007-3-21
应用手册 App Note 1148 Linear Regulators: Theory of Op & Comp 2004-5-10
应用手册 Understanding the Terms and Definitions of LDO Voltage Regulators 1999-10-21

设计与开发

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封装 引脚 CAD 符号、封装和 3D 模型
SOT-223 (DCY) 4 Ultra Librarian
TO-220 (NDE) 3 Ultra Librarian
TO-220 (NDG) 3 Ultra Librarian
TO-263 (KTT) 3 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

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