LM2576S-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576S-ADJ is a monolithic integrated circuit step-down switching regulator manufactured by UMW, belonging to the SIMPLE SWITCHER family. It operates with an input voltage range of 4V to 40V and delivers a maximum output current of 3A. The output voltage is adjustable from 1.23V to 37V via external resistors. Key electrical parameters include a fixed switching frequency of 52kHz, a typical standby current of 50µA, and an operating temperature range of -40°C to +125°C. The device utilizes a TO-263-5L surface-mount package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a synchronous rectifier for improved efficiency compared to standard asynchronous designs.
• Features internal frequency compensation to minimize the number of external components required.
• Includes comprehensive protection mechanisms such as thermal shutdown and cycle-by-cycle current limiting.

Voltage Regulators - DC DC Switching Regulators Applications

• High-efficiency DC-to-DC buck converters
• Positive adjustable output power supplies
• Pre-regulators for switching post-regulator linear regulators

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer marking on the component body matches UWM specifications. Confirm the suffix 'S' indicates the TO-263-5L surface mount package variant rather than through-hole or other packages. Ensure the datasheet version aligns with the production batch for accurate pinout and thermal characteristics.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when an adjustable output voltage is required within the 4V to 40V input range. The synchronous rectification feature makes it suitable for applications prioritizing higher efficiency over cost-sensitive non-synchronous alternatives. Ensure the external inductor selection supports the 3A output current capability.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2576HV/S series of SIMPLE SWITCHER regulators. Unlike the LM2576HVS-3.3 which provides a fixed 3.3V output, the LM2576S-ADJ offers adjustable output flexibility. It differs from the LM2576S-3.3 by allowing user-defined voltage settings rather than providing a fixed 3.3V rail.

Voltage Regulators - DC DC Switching Regulators FAQ

Does the LM2576S-ADJ use synchronous rectification?

Yes, the LM2576S-ADJ integrates a synchronous rectifier, which distinguishes it from earlier asynchronous versions of the LM2576 series.

What is the minimum input voltage for operation?

The device requires a minimum input voltage of 4V to function correctly.