LM2588S-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2588S-3.3/NOPB is a SIMPLE SWITCHER 5A Flyback Regulator manufactured by Texas Instruments, formerly National Semiconductor. It operates as a step-up wide VIN flyback converter with an input voltage range of 4V to 40V and provides a fixed 3.3V output. The device supports up to 6.5A output current in flyback topology and features a 200kHz switching frequency. It is housed in a TO-263-7 (DDPAK/TO-263) surface-mount package and functions within an operating temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated 5A flyback power converter capability for high-current step-up applications
• Wide input voltage range supporting 4V to 40V sources
• Built-in shutdown functionality for power management
• Fixed 3.3V output voltage option

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial control systems requiring isolated or non-isolated step-up power
• Battery-powered equipment needing extended runtime via flyback conversion
• Automotive electronics operating within wide input voltage variations
• Telecommunications infrastructure power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation carefully, as the component was originally produced by National Semiconductor before its acquisition by Texas Instruments. Ensure the suffix /NOPB confirms lead-free and RoHS compliance status according to current datasheets. Confirm the specific output voltage variant matches the required 3.3V specification, as other fixed voltage options exist within the LM2588 family. Cross-reference the package type TO-263-7 to ensure compatibility with existing PCB footprints.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this regulator when a fixed 3.3V output is required from a wide input range between 4V and 40V. The choice depends on the need for a 5A rated controller capable of driving external MOSFETs in a flyback topology. Consider the thermal performance of the TO-263 package for heat dissipation requirements. Verify that the 200kHz switching frequency aligns with electromagnetic interference constraints and passive component sizing goals for the target design.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2588 series belongs to the SIMPLE SWITCHER family of switching regulators designed for simplified power supply designs. This specific part represents the flyback variant, distinct from buck or boost topologies. The /NOPB suffix indicates a non-lead-based product compliant with environmental directives. The transition from National Semiconductor branding to Texas Instruments reflects corporate consolidation while maintaining technical continuity.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2588SX-12/NOPB offers identical topology and pinout but provides a 12V fixed output instead of 3.3V. LM2587S-33/NOPB is a similar 5A flyback regulator but may differ in internal reference or shutdown characteristics; verify electrical equivalence before substitution.