TILM2596T-12/NOPB

Overview

The LM2596T-12/NOPB is a monolithic integrated circuit that provides all the active functions for a step-down (buck) switching regulator, capable of driving a 3A load with excellent line and load regulation. This specific variant provides a fixed 12V output and operates at a switching frequency of 150 kHz, allowing for the use of smaller filter components compared to lower frequency regulators. It is housed in a through-hole TO-220 package, making it suitable for applications requiring robust thermal management.

Why Choose This Part

The device simplifies design by requiring only four external components while offering internal frequency compensation and a fixed-frequency oscillator. It includes thermal shutdown and cycle-by-cycle current limit protection, ensuring robust performance in harsh environments. The 150 kHz switching frequency offers a good balance between component size and electromagnetic interference (EMI) management.

Applications

Getting Started

When designing with the LM2596T-12/NOPB, ensure the input capacitor is placed as close as possible to the VIN and GND pins to minimize voltage transients. Use a Schottky catch diode with a current rating at least 1.3 times the maximum load current to maintain efficiency and reliability. For thermal management in 3A applications, a proper heat sink should be mounted to the TO-220 tab to prevent thermal throttling.

LM2596T Family