LM2575MX-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575MX-ADJ is a SIMPLE SWITCHER® step-down voltage regulator from Texas Instruments, designed for high-efficiency DC/DC conversion. It operates with an input voltage range of 4V to 60V and delivers a continuous output current of 1A. The device features an adjustable output voltage starting from 1.23V, controlled via an internal oscillator fixed at 52kHz. Packaged in the SOT-23 (SOT-23-5) surface-mount format, it integrates a 150mA driver transistor and includes comprehensive protection mechanisms such as thermal shutdown and current limiting.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated 150mA driver transistor eliminates the need for external pass transistors
• Fixed 52kHz switching frequency allows for small passive component sizes
• Internal compensation simplifies design and reduces external component count
• Built-in thermal shutdown and cycle-by-cycle current limiting ensure robust operation

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for industrial control systems
• Efficient battery-powered equipment power supplies
• General-purpose DC/DC converter modules
• Pre-regulator stages for linear regulators

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the package marking against the official SOT-23-5 specification to confirm authenticity. Ensure the suffix matches the exact part number variant required for your PCB footprint. Cross-reference the manufacturer's latest datasheet revision to confirm pinout compatibility and electrical characteristics before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact surface-mount solution is required for 1A buck applications. It is suitable for designs needing an input voltage up to 60V with minimal external components. Consider the thermal performance of the SOT-23 package under high load conditions and ensure adequate PCB copper area for heat dissipation compared to larger through-hole alternatives.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 family of SIMPLE SWITCHER regulators, which are known for their ease of use and high efficiency. The 'MX' suffix denotes the SOT-23 surface-mount package, distinguishing it from through-hole variants like TO-220 or TO-263. The 'ADJ' designation indicates that the output voltage is programmable using external resistors rather than being fixed at a standard value.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct functional substitutes include the LM2575HVT-ADJ for higher voltage tolerance or LM2575S-ADJ for different packaging needs. Verify pin-to-pin compatibility and thermal requirements when replacing with other buck converters from the same family or competing manufacturers offering similar 1A step-down specifications.