LM2577SX-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2577SX-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 3.5V to 40V and provides an adjustable output voltage between 1.23V and 60V. The device delivers a maximum output current of 3A with a typical switching frequency of 52kHz. It operates within a temperature range of -40°C to +125°C TJ and utilizes a TO-263-5 surface-mount package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic controller supporting boost, flyback, and forward converter configurations
• Built-in fixed-frequency oscillator eliminating external timing components
• Internal thermal shutdown and current limit protection mechanisms

Voltage Regulators - DC DC Switching Regulators Applications

• Battery-powered systems requiring voltage step-up
• General-purpose DC-DC power supplies
• Negative voltage generation circuits

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm pinout compatibility and functional equivalence. Ensure the ordering part number matches the required package variant and regulatory compliance status before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications requiring high efficiency in boost or flyback architectures. Consider the 3A current capability and wide input voltage range when designing power stages. Evaluate thermal performance requirements due to the TO-263 package constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2577 SIMPLE SWITCHER series, which integrates a controller, switch, and freewheeling diode into a single monolithic IC. The series is characterized by minimal external component count and robust protection features for standard switching regulator applications.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2577SX-ADJ/NOPB serves as the direct RoHS-compliant replacement for older non-NOPB variants. Verify pinout consistency when substituting legacy parts.