LM2577M-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2577M-ADJ is a SIMPLE SWITCHER step-up voltage regulator from Texas Instruments, designed for high-efficiency power conversion. It operates with an input voltage range of 3.5V to 40V and delivers up to 3A of output current. The device supports adjustable output voltages starting from 1.23V, utilizing external feedback resistors. Key electrical parameters include a typical switching frequency of 52kHz and a maximum switch voltage rating of 60V. It features integrated thermal shutdown and current limiting for robust protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic controller and power switch for simplified design
• Fixed-frequency current-mode control architecture
• Internal thermal shutdown and cycle-by-cycle current limiting
• Requires minimal external components for operation

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems
• Battery-powered applications requiring voltage boosting
• Positive-to-positive or positive-to-negative converter circuits
• Pre-regulators for downstream linear regulators

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the package type matches your PCB footprint requirements, as the LM2577 series includes TO-220 and TO-263 variants. Confirm the suffix indicates the adjustable version. Check for RoHS compliance status if required by your manufacturing standards. Ensure the supplier provides genuine Texas Instruments parts to avoid counterfeit risks associated with legacy power management ICs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a boost topology is required for inputs up to 40V. The adjustable output allows customization for specific load requirements. Consider the thermal performance of the chosen package for high-current applications. Compare against the LM2576 if a buck topology is more suitable for the system architecture.

Voltage Regulators - DC DC Switching Regulators Part Context

Part of the SIMPLE SWITCHER family, the LM2577 complements the LM2575 and LM2576 lines. While the LM2575 handles lower currents and the LM2576 provides buck regulation, the LM2577 specializes in step-up configurations. This family shares common control logic but differs in internal switch ratings and pinouts.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2577SX-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators FAQ

What is the minimum output voltage achievable with the LM2577M-ADJ?

The minimum regulated output voltage is determined by the internal reference voltage of 1.23V.

Does the LM2577 support negative output voltages?

Yes, the device can be configured to generate negative output voltages using appropriate circuit topology.