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1 January 2024

LM340 pinout | Introduction | Specifications | Packages | Features | Applications

Introduction 

LM340 is a 1.5-A fixed voltage regular. The LM340 is a three-terminal positive voltage regulator that uses safe area compensation, internal current limitation, and thermal shutdown, which basically makes it indestructible. This article mainly covers the configuration, pinout, circuit, applications, features, and more details about the LM340 voltage regulator.

Description

The LM340 is a three-terminal positive voltage regulator that uses a safe area compensation, internal current limitation, and thermal shutdown, which basically make them indestructible. Over the 1.5 A output current, they can provide sufficient heat sinking. Several uses, including local regulation to reduce noise and address distribution issues related to single-point regulation. This device can be utilized with external components to provide chargeable output voltage and currents, allowing it to be used as a fixed regulator. Much work was put into minimizing the amount of external components and making the complete line of regulators simple to operate.

Specifications

Output option - Fixed output
  • Iout(max) (A) - 1.5 
  • Vin(max) (V) - 35
  • Vin(min) (V) - 7.5
  • Vout(max (V) - 15
  • Vout(min) (V) - 5
  • Rating - Catalog
  • Noise (μVrms) -  40
  • Fixed output option (V) - 5,12,15
  • Accuracy (%) - 2.5
  • Thermal resistance θJA ( ºC/W) - 24
  • PSRR at 100 KHz(dB) - 50
  • Dropout voltage(Vdo) (typ) (mv) - 2000
  • Operating temperature range ( ºC) - 0 to 125
LM340 Pinout Configuration
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Packages
  • SOT - 223 - size -  45.5 mm2  6.5 * 7
  • TO-220 (NDE) - Size -  46.5328 mm² 10.16 ⨯ 4.58
  • TO-220(NDG) - Size - 193.548 mm² 10.16 ⨯ 19.05
  • TO-263 (KTT) - Size  - 154.8384 mm² 10.16 ⨯ 15.24

Features of LM340 IC

  • Output current up to 1.5 A.
  • Output voltage tolerance of  ±2% at TJ = 25 ºC.
  • Line configuration of 0.01% /V of at 1 -A load.
  • Load regulation of 0.3% / A 
  • Available in fixed  5-V, 10-V and 15-V options.
  • Internal thermal overload, short circuit, and SOA protection.
  • Output capacitance is not required for stability
LM340 Functional Block Diagram

LM340 functional block diagram

LM340 Functional Block Diagram


LM340 Applications

  • Industrial power supply
  • SMPS post regulation
  • Fixe3d voltage regulator
  • Test and measurement equipment
  • Solar energy string inverters
  • Brushed and brushless DC motors
  • HVAC system
  • Local on-card regulation
  • AC inverters
  • Energy string inverters

Conclusions :

Here this post gives the all about information IC LM 340 like pinout, applications, advantages, and features. We hope you all understand this topic. Furthermore, query regarding your project please give your feedback by commenting in the comment sections.

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