Startseite Energiemanagement Linear- und Low-Dropout-Regler (LDO)

LM340-MIL

AKTIV

Linearregler, 1,5 A, mit festem Ausgang

Produktdetails

Output options Fixed Output Iout (max) (A) 1.5 Vin (max) (V) 35 Vin (min) (V) 7.5 Vout (max) (V) 15 Vout (min) (V) 5 Fixed output options (V) 5 Rating Military Noise (µVrms) 40 PSRR at 100 KHz (dB) 50 Iq (typ) (mA) 8 Thermal resistance θJA (°C/W) 24 Load capacitance (min) (µF) 0 Regulated outputs (#) 1 Accuracy (%) 3.5 Dropout voltage (Vdo) (typ) (mV) 2000 Operating temperature range (°C) 0 to 125
Output options Fixed Output Iout (max) (A) 1.5 Vin (max) (V) 35 Vin (min) (V) 7.5 Vout (max) (V) 15 Vout (min) (V) 5 Fixed output options (V) 5 Rating Military Noise (µVrms) 40 PSRR at 100 KHz (dB) 50 Iq (typ) (mA) 8 Thermal resistance θJA (°C/W) 24 Load capacitance (min) (µF) 0 Regulated outputs (#) 1 Accuracy (%) 3.5 Dropout voltage (Vdo) (typ) (mV) 2000 Operating temperature range (°C) 0 to 125
TO-CAN (NDS) 2 969.2166 mm² 38.94 x 24.89
  • Output Current up to 1.5 A
  • Available in Fixed 5-V, 12-V, and 15-V Options
  • 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
  • Internal Thermal Overload, Short-Circuit and SOA Protection
  • Available in Space-Saving SOT-223 Package
  • Output Capacitance Not Required for Stability

The LM340-MIL monolithic 3-pin 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 regulator 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.

The LM340-MIL monolithic 3-pin 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 regulator 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.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet LM340-MIL Wide VIN 1.5-A Fixed Voltage Regulator datasheet PDF | HTML 16 Jun 2017
Application note A Topical Index of TI LDO Application Notes (Rev. F) 27 Jun 2019
Analog Design Journal Industrial-strength design considerations to prevent thermal and EMI damage 11 Apr 2014
Application note AB-12 Wide Adjustable Range PNP Voltage Regulator (Rev. B) 06 Mai 2013
Application note AN-1028 Maximum Power Enhancement Techniques for Power Packages (Rev. B) 06 Mai 2013
Application note AN-103 LM340 Series Three Terminal Positive Regulators (Rev. A) 06 Mai 2013
Application note AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B) 06 Mai 2013
Application note AN-256 Circuitry for Inexpensive Relative Humidity Measurement (Rev. B) 06 Mai 2013
Application note AN-298 Isolation Techniques for Signal Conditioning (Rev. B) 06 Mai 2013
Application note AN-182 Improving Power Supply Reliability with IC Power Regulators (Rev. B) 05 Mai 2013
Application note Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A) 05 Mai 2013
Application note Super Matched Bipolar Transistor Pair Sets New Standards for Drift and Noise (Rev. B) 05 Mai 2013
More literature Die D/S LM7808C MDC Series 3-Terminal Positive Regulators 28 Sep 2012
More literature Die D/S LM6172 MDC Dual Hi Spd, Low Pwr, Low Distortion Voltage Feedback Amp 27 Sep 2012
Application note Packaging Limits Range of Linear Regulators 08 Mai 2010
Application note Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A) 04 Jun 2008
User guide A User's Guide to Compensating Low-Dropout Regulators 21 Mär 2007
Application note Understanding the Terms and Definitions of LDO Voltage Regulators 21 Okt 1999

Design und Entwicklung

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