LM2577S-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2577S-ADJ/NOPB is a step-up voltage regulator from the SIMPLE SWITCHER family, designed for boost and flyback topologies. It accepts an input voltage range of 4V to 40V and provides an adjustable output voltage between 1.23V and 60V. The device supports a maximum output current of 3A with a typical switching frequency of 52kHz. It features internal compensation, thermal shutdown, and current limiting. Packaged in a TO-263-5 surface-mount format, it operates within a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-current power switch capable of delivering up to 3A output current
• Fixed-frequency oscillator at 52kHz enabling efficient design with standard components
• Internal frequency compensation simplifies external circuit requirements
• Built-in thermal shutdown and cycle-by-cycle current limit protection

Voltage Regulators - DC DC Switching Regulators Applications

• Battery-powered systems requiring voltage step-up
• General-purpose DC-DC conversion modules
• Industrial control power supplies
• Automotive electronics applications

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix NOPB indicates lead-free compliance and RoHS standards. Confirm the package variant matches the required TO-263 footprint. Ensure the specific revision aligns with your design's thermal and electrical requirements. Cross-reference the manufacturer datasheet for latest availability status.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a boost topology is required for inputs up to 40V. Consider the 3A current limit for load requirements. Evaluate the 52kHz switching frequency against EMI constraints. Compare efficiency curves in the datasheet against alternative regulators for optimal thermal performance.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2577 series of switching regulators. It complements other members like the LM2576 (buck) and LM2587 (higher current boost). The series offers a balance of simplicity and performance for non-isolated power conversion needs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2577SX-ADJ/NOPB is a tape-and-reel variant of the same functional device. LM2577HV-ADJ/NOPB supports higher input voltages. Verify pin compatibility and thermal characteristics before substitution.