LM2587T-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2587T-3.3/NOPB is a SIMPLE SWITCHER step-up/flyback switching regulator manufactured by Texas Instruments. It features a fixed 3.3 V output and supports up to 5 A output current with an input voltage range of 4 V to 40 V. The device utilizes a TO-220-5 package for through-hole mounting. Key electrical specifications include a 100 kHz switching frequency, 90% efficiency, and ±4% system output voltage tolerance. It incorporates internal soft-start, current-mode control, and protection circuits including overcurrent, undervoltage lockout, and thermal shutdown.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated 5.0 A, 65 V NPN power switch for high-current handling
• Current-mode control architecture for improved transient response and line regulation
• Internal 100 kHz oscillator allows use of compact magnetic components
• Built-in soft-start functionality reduces inrush current during startup

Voltage Regulators - DC DC Switching Regulators Applications

• Flyback converter designs
• Boost converter topologies
• Forward converter applications
• Industrial power supply systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free/RoHS compliance status according to the manufacturer's latest documentation. Confirm the TO-220-5 through-hole package type matches your PCB layout requirements. Ensure the fixed 3.3 V output variant aligns with your target voltage specification, as adjustable versions exist within the same series.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V output is required from a wide input voltage range up to 40 V. The TO-220-5 package is suitable for applications requiring robust thermal performance via through-hole mounting. Consider the 100 kHz switching frequency for balancing component size and efficiency. Verify that the 5 A current capability meets the maximum load demands of the design.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2587 SIMPLE SWITCHER family, which includes variants for different output voltages (3.3 V, 5.0 V, 12 V) and adjustable outputs. The 'T' suffix denotes the TO-220-5 through-hole package, while 'S' indicates surface-mount options. The series is designed for minimal external component count and cost-effective power conversion solutions.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2587T-ADJ/NOPB: Adjustable output version of the same package and series. LM2587S-3.3/NOPB: Surface-mount equivalent using TO-263-5 package. LM2587T-5.0/NOPB: Fixed 5.0 V output alternative.