LM2598SX-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2598SX-ADJ/NOPB is a SIMPLE SWITCHER® step-down switching regulator from Texas Instruments, housed in a TO-263-7 surface-mount package. It operates with an input voltage range of 4.5 V to 40 V and delivers up to 1 A of output current. The device features an adjustable output voltage ranging from 1.2 V to 37 V, controlled via an external resistor divider. It integrates a fixed-frequency internal oscillator operating at 150 kHz, enabling the use of compact passive components. The regulator includes thermal shutdown and current limit protection for robust operation across temperatures from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a power switch rated for 1 A continuous load current within a single monolithic IC.
• Features a fixed 150 kHz internal oscillator to minimize external component count and size.
• Includes comprehensive protection mechanisms such as thermal shutdown and cycle-by-cycle current limiting.

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply architectures requiring efficient step-down conversion
• Pre-regulator stages for linear post-regulators
• Battery-powered systems needing high-efficiency voltage regulation

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm pinout compatibility and electrical specifications. Ensure the ordering part number matches the required package variant and temperature rating. Cross-reference datasheet revisions to validate design-in parameters before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a 1 A buck converter solution is required with an input voltage up to 40 V. The adjustable output allows flexibility for various rail voltages. Consider the TO-263 package for its thermal performance in space-constrained applications compared to smaller packages.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2598 family of SIMPLE SWITCHER regulators, designed for high-efficiency DC-DC conversion. It serves as a drop-in replacement for older National Semiconductor versions, offering improved thermal characteristics and compliance with modern environmental standards while maintaining functional equivalence.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2598S-ADJ/NOPB is a documented equivalent part number representing the same functional device with updated manufacturing codes. Verify pin-to-pin compatibility and thermal resistance values when substituting legacy parts.