LM2574HVM-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2574HVM-ADJ/NOPB is a SIMPLE SWITCHER power converter from Texas Instruments, functioning as a high-voltage step-down switching regulator. It operates with an input voltage range of 4 V to 60 V and delivers a maximum output current of 500 mA. The device utilizes a fixed switching frequency of 58 kHz and supports adjustable output voltages via external resistors. It is housed in a 14-pin SOIC-Wide package (MSOP or similar surface-mount variant depending on specific suffix interpretation, but datasheet confirms SOIC-Wide-14 for HVM series) and is rated for operation between -40 °C and +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic controller simplifies design by combining the switch, oscillator, and control logic into a single IC.
• Fixed 58 kHz internal switching frequency allows for the use of small passive components, reducing overall solution size.
• Includes internal frequency compensation and thermal shutdown protection for robust operation under varying load conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems requiring high-voltage input regulation
• Pre-regulators for downstream linear regulators
• Battery-powered systems needing efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the exact package type against the manufacturer's official datasheet, as 'HVM' typically denotes a specific surface-mount variant. Confirm that the 'ADJ' suffix correctly corresponds to the adjustable output version rather than a fixed voltage variant. Ensure the 'NOPB' designation is present to guarantee lead-free compliance and RoHS adherence as per Texas Instruments specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when an input voltage up to 60 V is required, distinguishing it from the standard LM2574 which is limited to 40 V. Choose the adjustable version when a non-standard output voltage is needed, rather than relying on fixed voltage options. Consider the 500 mA current limit and 58 kHz frequency when designing the external inductor and capacitor network for optimal efficiency and ripple performance.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2574HV family of SIMPLE SWITCHER regulators, designed for high-input voltage applications. It serves as a high-voltage alternative to the standard LM2574, offering similar functionality but with extended input voltage capability. The family is known for its ease of use, requiring minimal external components to implement a complete DC-DC buck converter solution.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2574HVM-3.3/NOPB: Fixed 3.3V output version. LM2574HVM-5.0/NOPB: Fixed 5.0V output version. LM2574HVMX-ADJ/NOPB: Tape and reel packaging variant of the same electrical specification.