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Administración de potencia
Reguladores lineales y de baja salida (LDO)

LM340

ACTIVO

Regulador de tensión lineal de 1.5 A y 35 V

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LM340

ACTIVO
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Detalles del producto

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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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LM340, LM340A and LM7805 Family Wide VIN 1.5-A Fixed Voltage Regulators datasheet (Rev. L) PDF | HTML 29/09/2016
Nota sobre la aplicación A Topical Index of TI LDO Application Notes (Rev. F) 27/06/2019
Guía de selección Low Dropout Regulators Quick Reference Guide (Rev. P) 21/03/2018
Analog Design Journal Industrial-strength design considerations to prevent thermal and EMI damage 11/04/2014
Nota sobre la aplicación AB-12 Wide Adjustable Range PNP Voltage Regulator (Rev. B) 6/05/2013
Nota sobre la aplicación AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B) 6/05/2013
Nota sobre la aplicación AN-1028 Maximum Power Enhancement Techniques for Power Packages (Rev. B) 6/05/2013
Nota sobre la aplicación AN-103 LM340 Series Three Terminal Positive Regulators (Rev. A) 6/05/2013
Nota sobre la aplicación AN-298 Isolation Techniques for Signal Conditioning (Rev. B) 6/05/2013
Nota sobre la aplicación AN-256 Circuitry for Inexpensive Relative Humidity Measurement (Rev. B) 6/05/2013
Nota sobre la aplicación AN-182 Improving Power Supply Reliability with IC Power Regulators (Rev. B) 5/05/2013
Nota sobre la aplicación Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A) 5/05/2013
Nota sobre la aplicación Super Matched Bipolar Transistor Pair Sets New Standards for Drift and Noise (Rev. B) 5/05/2013
Nota sobre la aplicación Packaging Limits Range of Linear Regulators 8/05/2010
Nota sobre la aplicación Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A) 4/06/2008
Guía del usuario A User's Guide to Compensating Low-Dropout Regulators 21/03/2007
Nota sobre la aplicación Understanding the Terms and Definitions of LDO Voltage Regulators 21/10/1999

Diseño y desarrollo

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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
SOT-223 (DCY) 4 Ultra Librarian
TO-220 (NDE) 3 Ultra Librarian
TO-220 (NDG) 3 Ultra Librarian
TO-263 (KTT) 3 Ultra Librarian
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