LM2575S-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575S-3.3/NOPB is a SIMPLE SWITCHER® 1A step-down voltage regulator from Texas Instruments, designed for high-efficiency DC-DC conversion. It operates with an input voltage range of 4V to 40V and provides a fixed 3.3V output at up to 1A. The device features a 52kHz switching frequency and integrates current limiting and thermal shutdown protection. Packaged in TO-263 (D2PAK), it serves as a robust alternative to linear regulators, offering superior thermal performance and simplified design requirements.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated SIMPLE SWITCHER architecture minimizes external component count
• Built-in frequency compensation and fixed-frequency oscillator
• Includes overcurrent protection and thermal shutdown mechanisms

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for digital logic circuits
• Pre-regulation stage for downstream LDOs
• Battery-powered systems requiring efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the NOPB suffix confirms lead-free compliance and RoHS standards. Confirm package integrity for TO-263 mounting. Check manufacturer documentation for latest EOL status or PCN updates, as availability may vary. Ensure input/output capacitor specifications match application requirements for stability.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this model for applications requiring a fixed 3.3V output with up to 1A load capability. It is suitable where input voltages range between 4V and 40V. Consider the TO-263 package for surface-mount assembly with adequate thermal dissipation. Compare against adjustable variants if flexible output voltage is needed.

Voltage Regulators - DC DC Switching Regulators Part Context

Part of the LM2575 family, which includes LM1575 and LM2575HV variants. The 'S' denotes surface-mount TO-263 packaging, while '3.3' indicates the fixed output voltage. The NOPB suffix signifies non-pb (lead-free) construction compliant with environmental directives.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2575S-3.3 is listed as obsolete. Official substitutes include LM2575S-3.3/NOPB if available, or newer series like LMZ3 modules. Verify pin compatibility and thermal characteristics when transitioning to replacement components.