LM2575M-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575M-ADJ is a monolithic integrated circuit step-down switching regulator from Texas Instruments, belonging to the SIMPLE SWITCHER family. It operates with an input voltage range of 4V to 40V and delivers up to 1A output current. The device supports adjustable output voltages from 1.23V to 37V using external feedback resistors. Key electrical parameters include a typical switching frequency of 52kHz, a maximum duty cycle of 85%, and a quiescent current of 10mA. It features internal frequency compensation for stability and thermal shutdown protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated power switch rated for 1A continuous load current
• Internal fixed-frequency oscillator at 52kHz for simplified design
• Thermal shutdown circuitry protects against overheating conditions
• Standard 5-pin SOP-8 surface-mount package for compact integration

Voltage Regulators - DC DC Switching Regulators Applications

• General-purpose DC-to-DC buck converter circuits
• Pre-regulators for linear post-regulator applications
• Efficient battery-powered systems requiring voltage reduction
• Local on-card switching regulators for distributed power architectures

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'M' corresponds to the SOP-8 package variant rather than TO-220 or TO-263 configurations. Confirm the 'ADJ' designation indicates the adjustable output version. Ensure compliance with RoHS standards if required by the target application environment. Cross-reference the manufacturer part number against official TI documentation to avoid confusion with similar series components.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact surface-mount solution is required for buck conversion tasks. The adjustable output capability allows flexibility in setting specific voltage levels via external resistors. Consider the 52kHz switching frequency for balancing component size and efficiency. Evaluate thermal performance requirements given the small footprint and potential heat dissipation challenges in enclosed spaces.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 series of simple switchers, designed for ease of use in step-down applications. It competes with other standard buck converters offering similar current ratings. The series is known for its robustness and straightforward external component requirements. It serves as a foundational component for basic power management designs where cost and simplicity are prioritized over high-frequency operation.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-compatible substitutes may include other LM2575 variants with different packages or fixed outputs, though functional equivalence requires checking input/output specifications. Alternative families from other manufacturers should be evaluated based on switching frequency, current rating, and package dimensions. Verify that any replacement maintains the same control loop characteristics and protection features.