LM2599S-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2599S-3.3 is a SIMPLE SWITCHER power converter from Texas Instruments, functioning as a fixed-output step-down switching regulator. It accepts an input voltage range of 4.5 V to 40 V and provides a fixed 3.3 V output with a maximum load current of 3 A. The device operates at a typical switching frequency of 150 kHz and utilizes a TO-263 (D2PAK) surface-mount package. It features internal frequency compensation and a fixed-frequency current-mode control architecture for stable operation.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic switching regulator designed for high-efficiency DC-DC conversion
• Fixed 3.3 V output eliminates the need for external feedback resistors
• Internal frequency compensation simplifies external component requirements
• Built-in thermal shutdown and current limit protection mechanisms

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for distributed power systems
• Pre-regulator stages for post-LDO linear regulators
• Efficient buck converters for battery-powered equipment

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against the manufacturer datasheet to confirm pinout compatibility and electrical tolerances. Ensure the procurement source provides original manufacturer documentation to validate RoHS compliance and lead-free status. Cross-reference the part number with official TI databases to distinguish between legacy and current production versions.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V output is required with up to 3 A load capability. It is suitable for designs prioritizing simplicity over adjustable output flexibility. Consider the TO-263 package for its thermal dissipation advantages in space-constrained applications requiring moderate current handling without external heat sinks.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2599 series of SIMPLE SWITCHER regulators, which are known for their ease of use and robust performance. The series includes various fixed voltage options and adjustable variants, catering to diverse industrial and commercial power supply needs while maintaining a consistent control architecture.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other LM2599 series variants with compatible output voltages or current ratings, such as the LM2599T-5.0 for through-hole applications. Verify pinout alignment and thermal characteristics when transitioning between different package types within the same family.