LM2598S-5.0

Voltage Regulators - DC DC Switching Regulators Overview

The LM2598S-5.0/NOPB is a SIMPLE SWITCHER® fixed-output step-down switching regulator from Texas Instruments, designed for efficient DC-DC conversion. It operates with an input voltage range of 4.5 V to 40 V and provides a fixed 5 V output at up to 1 A load current. The device integrates a 150 kHz oscillator for compact external component sizing and includes thermal shutdown and current limiting protection. Packaged in TO-263 (DDPAK-7) surface-mount format, it supports operation temperatures from -40 °C to +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic buck converter topology simplifies power supply design
• Built-in thermal shutdown and current limit protection ensures operational reliability
• Fixed 5 V output eliminates need for external feedback resistors

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Input stage conditioning for battery-powered devices
• General-purpose 5 V distribution networks

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix /NOPB indicates lead-free packaging compliant with RoHS standards. Confirm the package variant matches the required footprint, as 'S' denotes TO-263 while 'SX' may indicate tape-and-reel handling. Ensure the specific revision aligns with current production status, as older variants like LM2598S-50 may be marked as Not Recommended for New Designs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this part when a fixed 5 V rail is required from a higher bus voltage up to 40 V. It is suitable for applications needing moderate efficiency without complex control loops. Compare against the LM2596 series if higher 3 A output current is necessary, or consider the LM2595 series for adjustable output flexibility within similar thermal constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

Part of the SIMPLE SWITCHER family, the LM2598 complements the higher-current LM2596 and lower-pin-count LM2595. While sharing the 150 kHz architecture, it targets 1 A applications requiring fewer external components than adjustable regulators. It serves as a direct replacement for legacy National Semiconductor parts under the TI portfolio.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2598S-5.0/NOPB is the active lead-free version. The LM2598S-50 is listed as Not Recommended for New Design (NRND), with the /NOPB variant explicitly recommended as the alternate source.