LM2596ADJ Adjustable Step-Down Regulator IC | 3A Buck Converter – TO263-5

The LM2596ADJ is a high-efficiency adjustable step-down (buck) switching regulator IC capable of delivering up to 3A output current with precise line and load regulation. Designed for versatile DC–DC conversion, it offers an adjustable output voltage ranging from 1.2V up to 37V, depending on the input supply.

With an input voltage range of 4.5V to 40V DC and a fixed 150 kHz switching frequency, the LM2596ADJ enables compact, efficient power supply designs using smaller inductors and filter components. The regulator includes built-in thermal shutdown, current limiting, and low standby current (≈80 µA) for improved power efficiency and system protection.

This IC is widely used in DIY power modules, industrial power supplies, battery systems, LED drivers, and embedded power circuits that require reliable adjustable voltage output.

Features / Specifications

• Model: LM2596ADJ

• Package: TO263-5 (SMD)

• Input Voltage Range: 4.5V to 40V DC

• Output Voltage: 1.2V to 37V (adjustable)

• Maximum Output Current: 3A

• Switching Frequency: 150 kHz

• Standby Current: ~80 µA

• Regulation: Excellent line and load response

• Protections:

  • Internal thermal shutdown

  • Current limiting

• Applications:

  • Adjustable DC power supplies

  • Buck converter modules

  • LED drivers

  • Battery charging & regulation

  • Embedded system power rails

Package Includes:
1 × LM2596ADJ Adjustable Step-Down Regulator – TO263-5

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