LM2575SX-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575SX-ADJ/NOPB 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 4 V to 40 V and delivers up to 1 A output current. The device features an adjustable output voltage ranging from 1.23 V to 37 V. It utilizes a fixed switching frequency of 52 kHz and incorporates internal frequency compensation to minimize external component count. Key protection features include thermal shutdown and cycle-by-cycle current limiting. The unit is housed in a TO-263-5 (D2PAK) surface-mount package and supports operation across a temperature range of -40 °C to +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated SIMPLE SWITCHER architecture enables efficient buck conversion with minimal external components.
• Built-in thermal shutdown and cycle-by-cycle current limiting ensure robust fault protection.
• Fixed-frequency oscillator simplifies design by reducing the need for external compensation networks.

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial power supply systems requiring regulated step-down conversion
• Battery-powered equipment utilizing wide input voltage ranges
• Embedded systems needing isolated or non-isolated DC/DC regulation

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the ordering suffix matches the exact part number to confirm the presence of lead-free plating and RoHS compliance. Confirm the package type corresponds to the required board layout. Ensure the supplier provides valid traceability documentation for quality assurance purposes before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing a system requiring a single-output buck converter with an input voltage up to 40 V. It is suitable for applications demanding an output current of 1 A with adjustable voltage settings. Consider the thermal performance of the TO-263-5 package relative to the expected ambient temperature and load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2575 series of monolithic integrated circuits, which provide all active functions for a buck switcher. The series is engineered to drive 1-A loads with excellent line and load regulation. It serves as a direct replacement for popular three-terminal linear regulators, offering significant reductions in size and weight while eliminating the need for large heat sinks in many applications.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2575S-ADJ/NOPB: Identical function with different packaging configuration.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the minimum output voltage achievable with this regulator?

The minimum adjustable output voltage is 1.23 V, determined by the internal reference voltage.

Does the device require external frequency compensation?

No, the LM2575SX-ADJ/NOPB includes internal frequency compensation, which significantly reduces the number of external components needed.