LM340T-15

Provides stable 1.5A output current
5,837 Effective Inventory

LM340T-15

Effective Inventory5,837

Provides stable 1.5A output current

  • Manufacturer Part # : LM340T-15

  • Package/Case: TO220-3

  • Part Status : NRND

  • Brand: Texas Instruments

  • Product Categories : Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

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Shipping & Payment

Shipping & Payment

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Service & Packaging

Service & Packaging

About After Sales Service

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Initiate the application within 90 days from the shipment date.

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LM340T-15 DataSheet
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Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!

Rapid Quote

Please submit RFQ for LM340T-15 or email to us: Email: [email protected], we will contact you in 12 hours.

Details

The LM340T-15 voltage regulator IC from National Semiconductor is a versatile and robust component designed to provide a stable output voltage of 15 volts, making it suitable for a wide range of electronic circuits. With a maximum output current of 1.0 ampere and a wide input voltage range of 17 to 35 volts, this IC offers flexibility and reliability in power supply and voltage regulation applications. Its built-in thermal shutdown protection feature prevents overheating, ensuring safe and continuous operation. Housed in a TO-220 package, the IC can be easily mounted onto a heat sink for improved thermal performance, further enhancing its reliability and longevity

Key Features

  • Efficient Power Conversion
  • Low Noise Operation Guaranteed
  • Safe and Reliable Design Features
  • Fast Transient Response Achieved
  • Compact and Space-Saving Design
  • Precision Voltage Regulation

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

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, 12, 15 Noise (µVrms) 40
Iq (typ) (mA) 8 Thermal resistance θJA (°C/W) 24
Rating Catalog Load capacitance (min) (µF) 0
Regulated outputs (#) 1 Accuracy (%) 2.5
PSRR at 100 KHz (dB) 50 Dropout voltage (Vdo) (typ) (mV) 2000
Operating temperature range (°C) 0 to 125, 0 to 70

Datasheet PDF

Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

Preliminary Specification LM340T-15 PDF Download

FAQs

What is LM340T-15?

The LM340T-15 is a 3-terminal, 1.5A positive voltage regulator in a TO-220 package manufactured by Texas Instruments. It is designed to provide a regulated output voltage of 15V with high current capability, making it suitable for a wide range of applications including power supplies, voltage regulation, and battery charging circuits.

How Does LM340T-15 Work?

The LM340T-15 operates by taking an unregulated input voltage and delivering a stable 15V output. It uses a reference voltage and an error amplifier to compare the output voltage to the reference and adjust the pass device to maintain a constant output voltage despite changes in input or load conditions.

How Many Pins does LM340T-15 have and What are the Functions of the Pinout Configuration?

The LM340T-15 is housed in a TO-220 package with three leads. The pinout configuration includes:

  • Input (Vin): The unregulated input voltage is applied to this pin.
  • Output (Vout): The regulated 15V output voltage is available at this pin.
  • Common (GND): This pin is connected to the ground or reference voltage of the system.

What are the Pros and Cons of LM340T-15?

Pros:

  • Simple to Use: Requires few external components for voltage regulation.
  • High Current Capability: Provides a continuous output current of 1.5A.
  • Thermal Shutdown Protection: Includes built-in thermal shutdown protection to prevent device failure under high temperature conditions.
  • Wide Operating Temperature Range: Can operate in a wide temperature range, making it suitable for various environments.
  • Cost-Effective: Offers cost-effective voltage regulation for many applications.

Cons:

  • Power Dissipation: May require a heat sink for high current applications to dissipate excess heat.
  • Dropout Voltage: Exhibits a higher dropout voltage compared to low-dropout regulators (LDOs).
  • External Capacitors: Requires input and output capacitors for stability and transient response.

Are There Any Equivalents/Alternatives to LM340T-15 for Recommendation?

  • The LM7815 from Texas Instruments is an equivalent 15V voltage regulator in the TO-220 package.
  • Alternatives to the LM340T-15 include the L7815CV from STMicroelectronics and the UA7815CKC from ON Semiconductor.

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