LM2598T-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2598T-3.3/NOPB is a SIMPLE SWITCHER power converter from Texas Instruments, functioning as a 150-kHz step-down voltage regulator. It provides a fixed 3.3 V output with a maximum current of 1 A. The device operates within an input voltage range of 4.5 V to 40 V and supports both through-hole and surface-mount installations in TO-220 or DPAK packages. It features internal frequency compensation, a 5 mA typical operating supply current, and thermal shutdown protection. The operational temperature range spans from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated 150 kHz oscillator eliminates the need for external timing components
• Internal frequency compensation simplifies design requirements
• Thermal shutdown protection safeguards against overheating conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for distributed power systems
• Pre-regulator stages for switching regulators
• Battery-powered applications requiring efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix (e.g., NOPB) to confirm lead-free compliance and RoHS status. Ensure the package type matches the intended PCB layout, as the T suffix indicates a TO-220 variant. Confirm availability through authorized distributors, as production cycles may vary. Cross-reference the datasheet revision to ensure compatibility with existing design specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V output at 1 A is required from a higher voltage rail up to 40 V. It is suitable for designs prioritizing simplicity and low external component count. Consider the TO-220 package for through-hole assembly or high thermal dissipation needs. Evaluate the 150 kHz switching frequency against EMI constraints and inductor size requirements.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2598 family of SIMPLE SWITCHER regulators, which are designed for straightforward buck converter implementations. The family includes adjustable and fixed voltage variants. The LM2598 series is known for its robust performance and minimal external component requirements, making it a standard choice for general-purpose DC-DC conversion tasks in industrial and consumer electronics.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2598T-ADJ/NOPB offers adjustable output voltage instead of fixed 3.3 V. LM2596T-3.3/NOPB is a similar regulator but typically rated for lower input voltages and different thermal characteristics. Verify pinout compatibility and thermal performance when substituting.