LM2599SX-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2599SX-ADJ/NOPB is a SIMPLE SWITCHER power converter from Texas Instruments, functioning as an adjustable step-down switching voltage regulator. It operates with a fixed switching frequency of 150 kHz and supports an input voltage range up to 40 V. The device delivers a maximum output current of 3 A with an adjustable output voltage range spanning from 1.23 V to the input voltage limit. Packaged in a TO-263-8 (D2PAK) surface-mount housing, it integrates a monolithic switching regulator designed for high efficiency and minimal external component requirements.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a fixed-frequency oscillator for simplified design implementation
• Includes internal frequency compensation to reduce external component count
• Features thermal shutdown protection for enhanced operational reliability

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation modules
• Pre-regulators for switching post-regulators
• Efficient buck converters for battery-powered systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'SX' confirms the TO-263-8 tape-and-reel packaging variant rather than the through-hole TO-220 version. Confirm the 'NOPB' designation indicates lead-free and RoHS compliance status per the manufacturer's latest documentation. Ensure the datasheet revision matches the required regulatory standards for your specific deployment environment.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust, single-inductor solution is required for medium-current applications. It is suitable for designs prioritizing simplicity over ultra-high efficiency at light loads. Consider the thermal performance of the TO-263 package relative to the expected ambient temperature and load current to ensure adequate heat dissipation without excessive heatsinking.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2599 family of SIMPLE SWITCHER regulators, which are widely recognized for their ease of use and high efficiency. The SX variant specifically denotes the surface-mount D2PAK package, distinguishing it from the TO-220 through-hole versions. This family is commonly used in industrial and commercial power supplies where reliable step-down conversion is essential.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-compatible alternatives within the same series include the LM2599SX-5.0/NOPB for fixed voltage needs. For higher current requirements, consider the LM2679 series. Verify that any substitute maintains the 150 kHz switching frequency and compatible control loop characteristics to avoid stability issues.