LM2596T-12/LF03

Voltage Regulators - DC DC Switching Regulators Overview

The LM2596T-12/LF03 is a SIMPLE SWITCHER step-down voltage regulator manufactured by Texas Instruments. It operates with an input voltage range of 4.5 V to 40 V and provides a fixed output voltage of 12 V at up to 3 A. The device utilizes a buck topology with a switching frequency of 150 kHz. It features a shutdown function and low operating supply current of 5 mA. Designed for through-hole installation, it is housed in a TO-220-5 package. The component supports an operating temperature range from -40 °C to +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic switch rated for 3 A continuous load current
• Fixed 12 V output option within the SIMPLE SWITCHER family
• Built-in thermal shutdown protection circuitry
• High efficiency operation due to internal synchronous rectification

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power systems requiring high current
• On-board regulation prior to point-of-load converters
• Efficient buck converters for battery-powered applications

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix LF03 against the manufacturer datasheet to confirm the exact tube packaging configuration and lead-free status. Ensure the fixed 12 V output variant matches the design requirements, as other suffixes may indicate adjustable or different voltage options. Cross-reference the TO-220-5 pinout with the official schematic to prevent integration errors during PCB layout.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12 V output is required without external feedback resistors. The TO-220-5 package is suitable for applications where through-hole mounting and direct heat dissipation are preferred over surface-mount alternatives. Consider the 150 kHz switching frequency for balancing component size and electromagnetic interference levels compared to higher-frequency regulators.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2596 series of SIMPLE SWITCHER regulators, which are designed for ease of use and high performance. The series includes various fixed voltage outputs and an adjustable version. The LM2596T-12/LF03 specifically represents the through-hole, fixed 12 V variant, distinguishing it from the surface-mount LM2596S series and the adjustable LM2596-ADJ models.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2596T-12/NOPB