LM2596R-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2596R-3.3 is a monolithic integrated circuit designed for step-down switching regulator applications, belonging to the SIMPLE SWITCHER family. It provides a fixed output voltage of 3.3V with a maximum load current capability of 3.0A. The device operates within an input voltage range of 4.5V to 40V and utilizes a fixed internal oscillator frequency of 150kHz. This specific variant features a surface-mount TO-263 (D2PAK) package configuration. Efficiency is optimized through low-loss switching, and the design requires only four external components.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Fixed 3.3V output voltage with high line and load regulation
• Integrated 150kHz fixed-frequency oscillator for simplified filter design
• Built-in thermal shutdown and two-stage current limit protection
• Low standby current consumption in shutdown mode

Voltage Regulators - DC DC Switching Regulators Applications

• Simple high-efficiency step-down (buck) regulators
• Efficient pre-regulators for linear regulators
• On-card switching regulators
• Positive to negative converter (buck-boost) circuits

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the ordering suffix corresponds to the correct moisture sensitivity level and tape-and-reel packaging specifications. Confirm that the component meets RoHS compliance standards if required by the target application. Ensure the supplier provides valid traceability documentation for the TO-263 package variant to guarantee authenticity and performance consistency.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required from an input voltage up to 40V. The 150kHz switching frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the TO-263 package for surface-mount assembly needs. Ensure the external inductor saturation current exceeds the maximum load requirement to prevent performance degradation.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2596 series of buck converters, which are widely used in industrial and consumer electronics for DC-DC conversion. The 'R' suffix typically denotes the surface-mount TO-263 package, distinguishing it from through-hole variants like the TO-220. It serves as a robust solution for power management where efficiency and simplicity are prioritized over ultra-low noise or high-frequency operation.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Compatible substitutes include LM2596S-3.3 from Texas Instruments and equivalent parts from other manufacturers offering the same 3.3V fixed output and 3A current rating. Verify pinout compatibility and thermal characteristics when replacing. Ensure the alternative component supports the same 150kHz operating frequency to maintain existing filter component values.