LM2591HVSX-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2591HVSX-ADJ/NOPB is a SIMPLE SWITCHER power converter from Texas Instruments, utilizing a buck topology to provide step-down voltage regulation. It operates with an input voltage range of 4.5 V to 60 V and delivers a maximum output current of 1 A. The adjustable output voltage spans from 1.2 V to 57 V. Key electrical parameters include a fixed switching frequency of 150 kHz and a typical quiescent current of 5 mA. The device is housed in a TO-263-5 (DDPAK) surface-mount package and supports an operating temperature range from -40 °C to +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic switching regulator designed for high-voltage step-down applications
• Fixed 150 kHz internal oscillator enables the use of compact external components
• Internal frequency compensation simplifies circuit design and reduces component count
• Built-in thermal shutdown and current limiting protect against overload conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems requiring high input voltage tolerance
• Efficient pre-regulators for downstream linear regulators
• Battery-powered systems needing extended operational life through high efficiency
• On-board switching regulators for general-purpose DC/DC conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'SX' corresponds to the TO-263-5 tape-and-reel packaging configuration when ordering. Confirm that the 'NOPB' designation ensures compliance with RoHS standards and absence of lead-based materials. Cross-reference the manufacturer part number with authorized distributors to ensure authenticity and traceability. Check for any recent product change notifications regarding pinout or thermal characteristics.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when an input voltage up to 60 V must be stepped down to an adjustable level between 1.2 V and 57 V. The 1 A output current capability suits moderate load requirements where high efficiency is critical. The TO-263-5 package provides adequate thermal dissipation for continuous operation without excessive heatsinking. Ensure the application environment remains within the specified -40 °C to +125 °C temperature range for reliable performance.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2591HV series of SIMPLE SWITCHER converters, which are engineered for high-voltage inputs. Unlike standard low-voltage counterparts, the HV variant tolerates inputs up to 60 V, making it suitable for industrial and automotive bus architectures. The adjustable version allows designers to tailor the output voltage using external resistors, offering flexibility across various system voltage rails.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2591HVS-ADJ/NOPB: Identical functional specifications but may differ in package style or reel orientation; verify mechanical fit before substitution.